Sharp DVD Player SF 1020 User Manual

SERVICE MANUAL

CODE: 00ZSF1120SM/E

MODEL SF-1020

MODEL SF-1120

Option

• Paper tray (SF-UB15)

SF-1020

• Two-step paper feed unit (SF-CM15)

• One-step paper feed unit (SF-CM16)

• Personal counter (SF-71A/71B)

• 10-bin sorter (SF-S17N) @

• 10-bin staple sorter (SF-S54) @

• Auto document feeder (SF-A18) @

• Reverse automatic document feeder

(SF-A57) @

SF-1120

@ For the options, refer to their service manuals.

CONTENTS

[ 1 ] PRODUCT OUTLINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 – 1

[ 2 ] PRODUCT SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 – 1

[ 3 ] PRODUCT VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 – 1

[ 4 ] UNPACKING AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 – 1

[ 5 ] DESCRIPTION ON EACH SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 – 1

[ 6 ] DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 – 1

[ 7 ] ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 – 1

[ 8 ] SIMULATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 – 1

[ 9 ] SELF DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 – 1

[10] MEMORY TROUBLES, FLOWCHART FOR REPLACEMENT OF

MAIN CONTROL PWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 – 1

[11] MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 – 1

[12] ELECTRICAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 – 1

Parts marked with "!" is important for maintaining the safety of the set. Be sure to replace these parts with specified

ones for maintaining the safety and performance of the set.

This document has been published to be used

for after sales service only.

The contents are subject to change without notice.

SHARP CORPORATION

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1-8. Transport roller . . . . . . . . . . . . . . . . . . . . . 6-3

1-9. Lower paper feed roller/take-up roller . . . 6-3

2. Transport unit . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

2-1. Resist roller, transfer roller . . . . . . . . . . . . 6-3

2-2. Transport belt . . . . . . . . . . . . . . . . . . . . . . 6-4

3. Fusing section . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

3-1. Fusing unit removal . . . . . . . . . . . . . . . . . . 6-5

3-2. Heater lamp replacement . . . . . . . . . . . . . 6-5

3-3. Upper heat roller ass’y removal . . . . . . . . 6-5

3-4. Upper separation pawl replacement . . . . . 6-6

3-5. Lower heat roller replacement . . . . . . . . . 6-6

3-6. Lower separation pawl replacement . . . . . 6-6

3-7. Thermistor/thermostat removal . . . . . . . . . 6-7

4. Optical system . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

1) Copy lamp replacement . . . . . . . . . . . . . . 6-7

B. DB blade replacement

(Replace every 120K copies.) . . . . . . . . 6-21

C. V ring attachment . . . . . . . . . . . . . . . . . . 6-21

D. Note for toner hopper drive gear (31T)

and stirring shaft attachment . . . . . . . . . 6-21

G. Developing unit color identification . . . . . 6-22

8. Operation panel/intermediate cabinet . . . . . . . 6-22

9. Frame major parts . . . . . . . . . . . . . . . . . . . . . . 6-22

9-1. Cooling fan motor replacement . . . . . . . 6-22

9-2. Power unit . . . . . . . . . . . . . . . . . . . . . . . . 6-23

9-3. Tray size detecting PWB . . . . . . . . . . . . 6-23

9-4. Main PWB unit . . . . . . . . . . . . . . . . . . . . 6-24

9-5. AC power PWB . . . . . . . . . . . . . . . . . . . . 6-24

9-6. Ozone filter (Check every 50K copies,

and clean every 100K copies.) . . . . . . . . 6-24

10. Multi paper feed unit (SF-MF15: option) . . . . . 6-25

10-1. Separation roller . . . . . . . . . . . . . . . . . . . 6-25

10-2. Take-up roller/paper feed roller . . . . . . . 6-25

11. ADU (SF-1120 only) . . . . . . . . . . . . . . . . . . . . 6-26

2) Mirror base wire replacement and

adjustment . . . . . . . . . . . . . . . . . . . . . . . . 6-7

3) No. 2/3 mirror unit (mirror base B)

installation (Mirror base B positioning) . . 6-10

12. Paper feed unit

4) Copy lamp unit installation

(SF-CM15, SF-CM16, option) . . . . . . . . . . . . . 6-27

(Mirror base A positioning) . . . . . . . . . . . 6-11

[7] ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . 7-1

5) No. 4/5 mirror unit (mirror base C)

replacement . . . . . . . . . . . . . . . . . . . . . . 6-11

1. Developing section . . . . . . . . . . . . . . . . . . . . . . 7-1

6) Lens wire replacement . . . . . . . . . . . . . . 6-13

7) Lens unit replacement . . . . . . . . . . . . . . 6-15

5. High voltage section . . . . . . . . . . . . . . . . . . . . 6-16

5-1. Main charger (MC) unit . . . . . . . . . . . . . . 6-16

1-1. Developing doctor clearance

adjustment . . . . . . . . . . . . . . . . . . . . . . . . 7-1

1-2. Developing magnet roller main pole

position adjustment . . . . . . . . . . . . . . . . . . 7-1

2. Optical system . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

2-1. Adjustment items . . . . . . . . . . . . . . . . . . . 7-2

2-2. Note for adjustments . . . . . . . . . . . . . . . . 7-3

2-3. Adjustment of each section . . . . . . . . . . . 7-4

A. Lens reference position adjustment . . . . . 7-4

5-2. Transfer/separation charger (TC/SC)

unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17

6. Process section . . . . . . . . . . . . . . . . . . . . . . . 6-17

6-1. Process unit . . . . . . . . . . . . . . . . . . . . . . 6-17

6-2. Waste toner bottle replacement

(required when waste toner full detection/

maintenance) . . . . . . . . . . . . . . . . . . . . . 6-18

B. No.4/5 mirror reference position

adjustment . . . . . . . . . . . . . . . . . . . . . . . . 7-4

6-3. Drum (Replace every 50K copies) . . . . . 6-19

C. Vertical copy magnification ratio

6-4. Blank lamp unit

adjustment . . . . . . . . . . . . . . . . . . . . . . . . 7-5

(Clean every 50K copies.) . . . . . . . . . . . 6-19

D. Resolution adjustment

6-5. Discharge lamp unit

(Focus adjustment) . . . . . . . . . . . . . . . . . . 7-6

(Clean every 50K copies.) . . . . . . . . . . . 6-19

E. Horizontal copy magnification ratio

6-6. Cleaner blade

adjustment . . . . . . . . . . . . . . . . . . . . . . . . 7-8

(Replace every 50K copies.) . . . . . . . . . . 6-20

F. Comparison table of lens values and

6-7. Drum separation pawl

simulation input values . . . . . . . . . . . . . . . 7-9

(Replace every 50K copies.) . . . . . . . . . . 6-20

G. Vertical skew adjsutment . . . . . . . . . . . . 7-10

H. Horizontal skew adjustment . . . . . . . . . . 7-10

I. Center shift adjustment . . . . . . . . . . . . . . 7-12

J. Exposure balance adjustment . . . . . . . . 7-12

K. Copy lead edge adjustment . . . . . . . . . . 7-13

2-4. Original detecting section . . . . . . . . . . . . 7-15

A. Original detecting arm unit adjustment . . 7-15

B. Original detecting level adjustment . . . . 7-16

2-5. Copy density adjustment . . . . . . . . . . . . 7-17

6-8. Process control PWB (Clean the sensor

section every 50K copies.) . . . . . . . . . . . 6-20

6-9. Drum mark sensor PWB (Clean the sensor

section every 50K copies.) . . . . . . . . . . . 6-20

6-10. Toner reception seal (Replace every 50K

copies.) . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20

7. Developing section . . . . . . . . . . . . . . . . . . . . . 6-20

A. DV side seals F/R replacement

(Replace every 120K copies.) . . . . . . . . . 6-20

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2-6. Process section adjustment . . . . . . . . . . 7-21

[8] SIMULATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

1. Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

2. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

3. Operating procedure . . . . . . . . . . . . . . . . . . . . . 8-1

4. List of simulations . . . . . . . . . . . . . . . . . . . . . . . 8-2

5. Details of simulations . . . . . . . . . . . . . . . . . . . . 8-4

6. User simulation . . . . . . . . . . . . . . . . . . . . . . . . 8-20

(1) Functions which can be set and

canceled by the user simulation . . . . . . . 8-20

(2) User simulation . . . . . . . . . . . . . . . . . . . 8-21

(3) User simulation code table . . . . . . . . . . . 8-21

(4) Department counter setting content

(Set with user program P10 ∼ P15) . . . . 8-21

[9] SELF DIAGNOSTICS . . . . . . . . . . . . . . . . . . . 9-1

1. Summary/purpose . . . . . . . . . . . . . . . . . . . . . . . 9-1

2. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

3. Clearing the self diag display . . . . . . . . . . . . . . 9-1

[10] SERVICING AT MEMORY TROUBLE

AND MAIN CONTROL PWB

REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . 10-1

1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

2. Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

3. Remedies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

4. Set value recording sheet . . . . . . . . . . . . . . . . 10-3

5. Memory simulation list . . . . . . . . . . . . . . . . . . . 10-4

[11] MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . 11-1

1. Maintenance cycle and maintenance items . . 11-1

[12] ELECTRICAL SECTION . . . . . . . . . . . . . . 12-1

1. System block diagram . . . . . . . . . . . . . . . . . . . 12-1

2. Main circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-3

(1) Block diagram . . . . . . . . . . . . . . . . . . . . . 12-3

(2) CPU (IC6) SC3041K12F . . . . . . . . . . . . . 12-4

(3) I/O (IC8) CXD1095Q . . . . . . . . . . . . . . . . 12-8

(4) Detector circuit of sensor signal . . . . . . 12-11

(5) Start/stop control circuit . . . . . . . . . . . . 12-11

(6) Heater lamp control circuit . . . . . . . . . . 12-12

(7) Driver circuit (Solenoid, electromagnetic

clutch) . . . . . . . . . . . . . . . . . . . . . . . . . . 12-13

(8) Stepping motor drive circuit . . . . . . . . . 12-13

(9) AE (Auto Exposure) sensor circuit . . . . 12-14

(10) Toner supply motor drive circuit . . . . . . 12-14

(11) Reset IC (IC13) . . . . . . . . . . . . . . . . . . . 12-14

(12) Operation panel . . . . . . . . . . . . . . . . . . 12-15

(13) EnergyStar circuit description . . . . . . . . 12-16

(14) ADU circuit description . . . . . . . . . . . . . 12-17

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[1] PRODUCT OUTLINE

1. Product features

(1) Compact body

(2) Clean copy gentle to the environment

• Silent design,

• Compact body size

The body width of 600mm is the smallest in the class.

• Low level of ozone, use of recyclable materials

• The employment of the front loading tray and the folding-type multi

manual paper feed cassette realizes the small occupying area.

• The energy-saving mode reduces the power consumption.

(3) High capacity of copying

• Warm-up time is less than 45 sec. The first copy of 5.3 sec (SF-

1020) or 5.8 sec (SF-1120).

(4) Fully expandable system. (Refer to "2. System configuration.")

2. System configuration (options)

10-bin staple sorter SF-S54

10-bin sorter SF-S17

Reversing automatic document feeder SF-A57

(SF-1120 only)

Automatic document feeder SF-A18

Tray (reserve) SF-UB15

Two-step paper feed unit SF-CM15

Exclusive-use desk

SF-DS17

SF-DS18

Personal counter

One-step paper feed unit SF-CM16

1 – 1

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(10) Void width

Void area: Lead edge/rear edge: 3mm or less

[2] PRODUCT SPECIFICATIONS

Image loss Normal: 4mm or less

(11) Paper exit/finishing

1. Basic specifications

Paper exit tray capacity: 250 sheets

Finishing: option 10-bin sorter, 10-bin staple sorter

(12) Additional functions

(1) Type: Table top

(2) Copy speed:

<SF-1020/1120>

Function

Remark

Enlargement

(Magnification) (Magnification)

Reduction

Normal

SF-1020 SF-1120

Auto Paper

Selection

8¹⁄₂″ × 13″: only the

specified area, original size

input

11 sheets/min 10 sheets/min 10 sheets/min

(200%) (50%)

13 sheets/min 12 sheets/min 12 sheets/min

20 sheets/min 15 sheets/min 15 sheets/min

15 sheets/min 14 sheets/min 14 sheets/min

20 sheets/min 15 sheets/min 15 sheets/min

15 sheets/min 14 sheets/min 14 sheets/min

11 sheets/min 10 sheets/min 10 sheets/min

13 sheets/min 12 sheets/min 12 sheets/min

20 sheets/min 15 sheets/min 15 sheets/min

Auto

Magnification

ratio Selection

A4 (Portrait)

A4 (Landscape)

B5 (Portrait)

B5 (Landscape)

W letter

Shift

1-set 2-copy

Edge erase

Trimming

Enlargement is impossible.

Legal

Letter (Portrait)

Masking

Letter (Landscape) 15 sheets/min 14 sheets/min 14 sheets/min

Centering

Move image

Covers/inserts

Overlay

(Note) The copy speeds for enlargement and reduction are the lowest

ones.

(3) Warm up time: 45 sec or less

Job memory

Monochrome

(4) First copy time: SF-1020

5.3 sec (Paper feed port: Upper tray)

SF-1120

(Red, Blue)

SF-1120

(13) External dimensions

5.8 sec (Paper feed port – from copier paper tray)

SF-1020

First copy time from each paper feed port (A4 landscape)

W × D × H mm

Occupying area

(W × D)

Weight

600 × 585 × 460

885 × 595

600 × 585 × 510

935 × 595

Paper feed port

SF-1020 Paper feed port

SF-1120

Body tray upper stage 5.3 sec ADU

5.8 sec

from copier

paper tray

Body tray lower stage 5.8 sec Body 1st step

48.5Kg

61.2Kg

(14) Power source

Option paper feed

unit first step

Option paper

feed unit 1st step

6.1 sec

6.4 sec

6.5 sec

6.8 sec

Voltage: 100V 50/60Hz

Frequency: 50/60Hz common

(15) Power consumption

Option paper feed

unit second step

Option paper

feed unit 2nd step

(5) Jam recovery time: 8 sec (Conditions: After leaving the door

open for 60 sec, the standard conditions)

Max. power

consumption

1.5kw

(Note) Max. when the

option is installed

(6) Multi copy Max. 99 sheets

(7) Original

Stand-by power

consumption

18W (Heater lamp OFF)

20% greater for H version

1kW (Heater lamp ON)

SF-1020

SF-1120

Average power

consumption

during operation

1320W

Max. original size

Reference original size

Original sensing

Sensing size

A3/W letter

Left side/Center

YES (Japan only)

A3 ∼ B5R

Preheating

60W

Auto power shut

off

4.8W

(8) Copy magnification ratio

Fixed magnification: Inch series: 200, 141, 122, 115, 100, 86,

81, 70, 50% (9 steps)

AB series: 200, 141, 129, 121, 100, 95,

77, 64, 50% (9 steps)

Zoom range: 50% ∼ 200% (151 steps by the increment of 1%)

(9) Exposure

Exposure mode: Auto/Manual/Photo

No. of manual steps: 9 steps

2 – 1

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(2) Optical section

Light source

2. Description of each section

Halogen lamp

(1) Paper feed section

Exposure system Slit exposure by moving the light source

SF-1020

SF-1120

Zooming system

By changing the lens positions and the scan

speed.

Copying size

A3 ∼ A6/W letter ∼ Invoice

Paper feed

system

2 trays + multi

manual feed

1 tray + multi

manual feed

Lens

Fixed focus lens

(3) Process

Paper feed

capacity

250 sheets × 2

250 sheets × 1

Charging system

Transfer system

Separation system

(–) DC saw teeth electrode system

(–) tungsten system

Cassette

Paper size Paper weight Paper kind Remark

(AC) separation tungsten system

AB series:

56 ∼ 80g/m²

15 ∼ 20 lbs

56 ∼ 80g/m²

15 ∼ 20 lbs

56 ∼ 80g/m²

15 ∼ 20 lbs

Standard

paper,

recycled

paper

A3 ∼ A5

(4) Developing section

Developing system

Body tray

upper stage

Inch series:

W letter ∼

Invoice

SF-1120:

copier

paper

Dry, two-component magnetic brush

development (developer replacement)

Developing bias voltage DC–200V ±5V

AB series:

Standard

paper,

recycled

paper

feed tray

A3 ∼ A5

Body tray

lower stage

(5) Fusing section

Inch series:

W letter ∼

Invoice

Fusing system

Heat roller system

190 degrees C

Upper heat roller surface temperature

Heater lamp

AB series:

Standard

paper,

recycled

paper

SF-CM15

(2-step)

SF-CM16

(1-step)

Halogen lamp 1000W × 1

A3 ∼ A5

Paper feed

unit (option)

(6) ADU section (For SF-1120 only)

Inch series:

W letter ∼

Invoice

Paper kind

Capacity

Normal paper, 56g/m²∼ 80g/m²

30 sheets

B4/8¹⁄₂″ × 14″

Lead edge, 3mm or less

Rear edge, 3mm or less

50 sheets

A4, B5, A5/8¹⁄₂″ × 11″

AB series:

A3 ∼ A6R

56 ∼ 80g/m²Standard

paper,

Paper size

Copy void width

Multi Inch series:

specified

paper,

special

15 ∼ 20 lbs

W letter ∼

Multi

Invoice

manual

paper

feed

paper, OHP

52 ∼

film, Second

128g/m²

AB series:

A3 ∼ A6R

original

paper,

Single Inch series:

postcards

(without

folding)

W letter ∼

Invoice

14 ∼ 34 lbs

2 – 2

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3. Supply parts

Brazil/Asia except Hong Kong

Name

Contents

Life

Product name

SF-216DR

OPC Drum kit

OPC Drum

Cleaner Blade

Drum Separation Pawl

Separation Pawl Spring

× 1

× 2

50K

Black Developer

Black Toner

Black developer

× 10

50K × 10

6K × 10

100K

SF-216CD1

(SF-216SD1 × 10)

SF-116CT

Black Toner Bottle (240 g)

× 10

(SF-116ST × 10)

Upper Heat Roller Kit

Upper Heat Roller

Upper Separation Pawl

Fusing Bearing (F)

× 1

× 4

× 1

SF-216UH

Lower Heat Roller Kit

Staple Cartridge

Lower Heat Roller

Lower Separation Pawl

× 1

100K

SF-220LH

× 4

Staple Cartridge (For SF-S54)

× 3

5K staples × 3

SF-LS12

(SF-SC12 × 3)

Middle East/Africa

Name

Contents

Life

Product name

SF-216DM

OPC Drum Kit

OPC Drum

Cleaner Blade

Drum Separation Pawl

Separation Pawl Spring

× 1

× 2

50K

Black Developer

Black Toner

Black Developer (530g)

× 10

50K × 10

6K × 10

100K

SF-216LD1

(SF-216DV1 × 10)

SF-116LT

(SF-116T × 10)

Black Toner Bottle (240g)

× 10

Upper Heat Roller Kit

Upper Heat Roller

Upper Separation Pawl

Fusing Bearing (F)

× 1

× 4

× 1

× 4

SF-216UH

SF-220LH

Lower Heat Roller Kit

Staple Cartridge

Lower Heat Roller

Lower Separation Pawl

100K

Staple Cartridge (For SF-S54)

× 3

5K staples × 3

SF-LS12

(SF-SC12 × 3)

2 – 3

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Functions

4. Optional specifications

Original detection on the

tray

Available (For originals of indefinite

sizes, scanning is made.)

(1) Automatic document feeder (ADF)

Detection size

Japan: A3, B4, A4, A4R, B6, B6R

Inch series: 11" × 17", 8 1/2" × 14", 8

1/2" × 11", 8 1/2" × 11"R, 8 1/2" × 5 1/2"

E× AB series: A3, B4, A4, A4R, A5

Original set direction

Original set position

Face up

Center reference

Original mixture

Original reverse

Allowed (However, no linkage with the

AMS)

Original transport system Belt (half size) system

Original feed sequence

Original size

Bottom taking (Face up exit)

A3 ∼ A5/11" × 17" ∼ 8 1/2" × 5 1/2"

20 sheets/min

Allowed

Display section

Original change speed

(S → S)

1 Original feed display

The ADF shows the operation

allowable state. When an original is

set, the display lights up.

Original weight

35 ∼ 128g/m²

(50 ∼ 128g/m²for EX)

2 Original remaining

When the automatic document feeder

is used as the original cover, the LED

lights up simultaneously when the last

exposure is completed. When the

transport cover is opened, the LED

goes off.

Original set quantity

50 sheets, 35 ~ 80 g/cm²,

display

80 ~ 128 g/m²thickness max. 6.5 mm

Original stop system

Dimensions

Position control system

571 (W) × 521 (D) × 110 (H) (mm)

(Height: excluding the tray)

SDF mode

Selection between the SDF mode and

the ADF mode is possible. (Selected

by the user program.)

Weight

About 11.5kg

Power source

Power consumption

Supplied from the copier’s power section.

65W

(3) 10-bin sorter

Functions

Original sensing on

the tray

YES (Scanning read for uncertain size

originals.)

Type

Copier installation type/Hanging type

Distribution system

No. of bins

Bin shift by lead screw

Sensing size

Inch series: 11" × 17", 8 1/2" × 14", 8 1/2" ×

11", 8 1/2" × 11"R, 8 1/2" × 5 1/2"

AB series: A3, B4, A4, A4R, A5

10 bins (The top bin is used also for

non-sort.)

Original mixture

Original reverse

Allowed (However, no linkage with the AMS)

Capacity

Sorting

30 sheets/bin (L4/letter size), 100

sheets for the top bin only.

30 sheets (A4/letter)

15 sheets (B4/legal)

15 sheets (A3/W letter)

20 sheets (A4/letter)

15 sheets (B4/legal)

15 sheets (A3/W letter)

(2) Reverse automatic document feeder (RADF)

Grouping

Original set direction

Original set position

Original transport system

Original feed sequence

Original size

Face up

Center reference

Paper size

(Non-sort)

A3 ∼ A6 (Postcard)R/11" × 17" ∼

8 1/2" × 5 1/2"

Belt system

Bottom taking (Face up exit)

A3 ∼ A5, 11" × 17" ∼ 8 1/2" × 5 1/2"

20 sheets/min

(Sort/group)

A3 ∼ A5/11" × 17" ∼ 8 1/2" × 11"

Process capacity

Paper transport

Paper reception

Paper weight

20 sheets/min

Original replacement

speed (S → S)

Center reference

Face up

Original weight

35 ∼ 128g/m²(50 ∼ 128g/m²for EX)

(Non-sort)

52 ∼ 128g/m²(14 ∼ 34lbs)

Original set capacity

50 sheets, 35 ∼ 80g/m²

(Sort/group)

56 ∼ 80g/m²(15 ∼ 21lbs)

80 ∼ 128g/m²: thickness Max. 6.5mm

Dimensions

335 (W) × 493 (D) × 298 (H)

Original stop system

Dimensions

Position control

(Width: Including the tray.)

592 (W) × 521 (D) × 110 (H) mm

(Height; excluding the tray)

Weight

7kg

Weight

About 12.5kg

Power source

Supplied from the copier. DC24V (1.2A)

Max. 30W

Power source

Supplied from the copier (equipped

with the power source).

Power consumption

73W

2 – 4

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(4) 10-bin staple sorter (10-bin SS)

(5) Two-step paper feed unit

Type

Copier installation type/hanging type

Paper size

A3 ∼ A5

Distribution system

No. of bins

Bin shift system by lead screw

Paper feed capacity

Paper weight

Paper kind

250 sheets × 2 steps

10 bins (The top bin is commonly used

for non-sort.

56 ∼ 80g/m²(15 ∼ 21 lbs)

Standard paper, recycled paper

Tray replacement/user handling

Supplied from the copier.

570 (W) × 570 (D) × 208mm (H)

About 14kg

Capacity

Sort

30 sheets for each bin

(A4, 8 1/2" × 11", 80g/m²)

100 sheets for the top bin

Size selection

Power source

Dimensions (W × D × H)

Weight

30 sheets (A4, 8 1/2" × 11")

15 sheets (B4, 8 1/2" × 14", 8 1/2" × 13")

15 sheets (A3, 11" × 17") 80g/m²

Grouping

20 sheets (A4, 8 1/2" × 11")

15 sheets (B4, 8 1/2" × 14")

15 sheets (A3, 11" × 17"), 80g/m²

30 sheets (A4, 8 1/2" × 11")

15 SHEETS (B4, 8 1/2" × 14")

15 sheets (A3, 11" × 17") 80g/m²

(6) One-step paper feed unit

<SF-CM16>

Staple sort

Paper size

A3 ∼ A5

Paper feed capacity

Paper weight

Paper kinds

Size selection

Power source

Dimensions

Weight

250 sheets × 1 step

56 ∼ 80g/m², 15 ∼ 21 lbs

Standard paper, recycled paper

Tray replacement, user operation

Supplied from the copier.

570(W) × 570(D) × 103(H)mm

About 8.5kg

Paper size

Non-sort

Sort/group/staple sort

A3 ∼ A6R

11" × 17" ∼ 8 1/2" × 5 1/2"

A3 ∼ A5

11" × 17" ∼ 8 1/2" × 5 1/2"

Alignment (Sorting)

Process capacity

Paper transport

Max. shift 2mm (Alignment operation)

20 sheets/min

Center reference

Face up

Paper loading

(7) Exclusive-use desk

Paper weight Non-sort

49 ∼ 128g/m²

1. SF-DS17

Sort/group/staple sort

56 ∼ 80g/m²

(Desk without 2-step paper feed unit SF-CM15)

Dimensions

Weight

390(W) × 542(D) × 400(H)mm

Dimensions

Weight

570(W) × 523(D) × 520(H)mm

About 19.5kg

Caster

About 11.5kg, 15kg (including the

installation kit)

Functions

Provided

None

Adjuster

Door

Power source

DC24V (1.5A) supplied from the copier.

Max. 36W

None

Power consumption

Staple section

Type

Copier stapler

Stapling time

No. of stapled sheets

Binding reference

Staple supply

Staple

30 sheets (80g/m²)

Front reference

Cartridge (5,000 pcs.)

SF-SC12

No staple/no cartridge/no

stapler detection

Available

Staple jam detection

Manual staple mode

Available

Available (excluding manual stapling)

2 – 5

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[3] PRODUCT VIEWS

1. External view and internal structure

Upper unit

Lower unit

No.

Name

No.

Name

No.

Name

Original stocker

Paper exit tray

Original cover

Grip

Original table

Manual feed unit

Operation panel

Manual feed original guide

Front cover

Manual feed tray

Power switch

Paper tray (SF-1020),

Duplex tray (SF-1120)

Paper tray

Developing unit grip

Developing unit strap

Release lever

Toner hopper

Fusing unit

Developing unit lock lever

Drum

3 – 1

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2. Operation panel

SF-1020

(AB series)

9 10

ORIGINAL

SIZE

PAPER

SIZE

SORTER

SORT

PRESET

RATIO

EXPOSURE

200%

141%

122%

115%

POWER SAVE

AUDIT CLEAR

DUAL PAGE

COPY

EXTRA

AUTO

MANUAL

PHOTO

STAPLE

SORT

100%

MARGIN

SHIFT

86%

81%

70%

50%

ZOOM

INTERRUPT

GROUP

AUTO PAPER SELECT

EDGE

ERASE

LIGHT DARK

ORIGINAL SIZE

ENTER

TRAY SELECT

AUTO IMAGE

(Inch series)

25 26 27

ORIGINAL

SIZE

PAPER

SIZE

SORTER

SORT

PRESET

RATIO

EXPOSURE

200%

141%

129%

121%

POWER SAVE

AUDIT CLEAR

DUAL PAGE

COPY

AUTO

MANUAL

PHOTO

8½

8½ 5½

8½

STAPLE

SORT

100%

MARGIN

SHIFT

95%

77%

INT ER RUP T

ZOOM

GROUP

x13

64%

50%

EXTRA

A UTO PA PE R S ELEC T

EDGE

ERASE

LIGHT DARK

ORIGIN A L SIZ E

ENTER

T R AY S E LE CT

A UT O IM A GE

25 26 27

No.

Name

1-set 2-copy key/Display lamp

No.

Name

Density selection key/Display lamp

No.

Name

Paper jam lamp

Paper supply lamp

Tray position/Paper jam position lamp

Copy quantity display

Magnification ration lamp

Mini maintenance lamp

Pre-heat lamp

Maintenance lamp

Toner supply lamp

10-key pad

Department count end key

Sorter key/Display lamp

All clear key

Clip tray

Binding margin key/display lamp

Original size display lamp

Paper auto selection display lamp

Edge erase key/Edge erase lamp

Paper size display lamp

Density adjustment key/Display lamp

Tray selection key

Auto magnification ratio selection

key/Display lamp

[

Magnification ratio selection key

Zoom key

Zoom lamp

]

% key

Interruption key/Display lamp

PRINT button

Zero-Read-out key

Original size enter key

Erase key

3 – 2

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SF-1120

(AB series)

9 10

ORIGINAL

TO COPY

ORIGINAL

SIZE

PAPER

SIZE

SORTER

PRESET

RATIO

EXPOSURE

200%

141%

122%

115%

POWER SAVE

AUDIT CLEAR

DUAL PAGE

COPY

EXTRA

SORT

AUTO

MANUAL

PHOTO

EVEN

NUMBER

ODD

NUMBER

STAPLE

SORT

100%

MARGIN

SHIFT

86%

81%

70%

50%

INTERRUPT

ZOOM

GROUP

PRE-COUNT

ORIGINALS

AUTO PAPER SELECT

EDGE

ERASE

LIGHT DARK

ORIGINAL SIZE

ENTER

TRAY SELECT

AUTO IMAGE

25 26 27

(Inch series)

ORIGINAL

SIZE

PAPER

SIZE

SORTER

SORT

PRESET

RATIO

EXPOSURE

200%

141%

129%

121%

POWER SAVE

AUDIT CLEAR

T O

OPY

DUAL PAGE

COPY

11 17

AUTO

MANUAL

PHOTO

EVEN

8½

8½ 5½

8½ 11

NUMBER

ODD

STAPLE

SORT

100%

NUMBER

MARGIN

SHIFT

95%

77%

64%

50%

INT ER RUP T

ZOOM

GROUP

8½

x13

EXTRA

P RE -C OU NT

ORIGINALS

A UTO PA PE R S ELEC T

EDGE

ERASE

LIGHT DARK

ORIGIN A L SIZ E

ENTER

T R AY S E LE CT

A UT O IM A GE

25 26 27

No.

Name

No.

Name

Density selection key/Display lamp

No.

Name

1-set 2-copy key/Display lamp

Paper supply lamp

Paper jam lamp

Tray position/Paper jam position lamp

Copy quantity display

Magnification ration lamp

Mini maintenance lamp

Pre-heat lamp

Maintenance lamp

Toner supply lamp

10-key pad

Department count end key

Sorter key/Display lamp

All clear key

Clip tray

Binding margin key/display lamp

Original size display lamp

Paper auto selection display lamp

Edge erase key/Edge erase lamp

Paper size display lamp

Density adjustment key/Display lamp

Tray selection key

Auto magnification ratio selection

key/Display lamp

[

Magnification ratio selection key

Zoom key

Zoom lamp

]

% key

Interruption key/Display lamp

PRINT button

Zero-Read-out key

Erase key

Duplex key/Display lamp (SF-1120 only)

Original size enter key

3 – 3

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3. Clutches, solenoids, and motors (Explained with the SF-1120 and the SF-CM15)

Clutches and solenoids

No.

Signal name

PSPS

Name

Functions, operations

Paper separation solenoid drive

For resist roller rotation

Paper separation solenoid

Resist roller clutch

RRC

TRC

Transport roller clutch

For transport roller rotation

For paper feed roller rotation

For pressing take-up roller

For selection of the gate

CPFC1

CPFC2

CPFC3

CPFC4

MPFS

Tray paper feed clutch (Paper is fed from the ADU in the SF-1120)

Tray paper feed clutch

Option tray paper feed clutch (SF-CM15, SF-CM16)

Option tray paper feed clutch (SF-CM15 only)

Manual paper feed solenoid

Gate solenoid (SF-1120 only)

DPFC

DRRC

Take-up roller clutch (SF-1120 only)

For ADU take-up roller rotation

For ADU transport roller rotation

Transport roller clutch (SF-1120 only)

Motors

No.

Signal name

VFM

Name

Ventilation fan motor

Functions, operations

Type

Used to ventilate around the fusing section, cools

down the machine, and remove ozone.

DC brushless

Main motor

Used to drive the body.

DC brush

CFM

Optical system cooling fan

Lens motor

Used to cool and ventilate the optical system.

Used to move the optical lens.

Used to stir toner.

DC brushless

DC stepping

DC synchronous

DC stepping

DC brush

Toner motor

MRM

CS2M

CS3M

CS4M

SMF

VFM2

Mirror motor

Used to move the mirror base.

Used to drive the paper feed roller.

Used to drive the option paper feed roller.

Paper feed motor (SF-CM15, CM16)

Option paper feed motor

DC brush

Option paper feed motor (SF-CM15 only) Used to drive the option paper feed roller.

DC brush

Suction fan motor

Exhaust fan motor

Used to ventilate the suction section.

DC brushless

Used to ventilate the fusing section, cool the machine, DC brushless

and exhaust ozone.

DFM

Duplex copy fan motor (SF-1120 only)

ADU motor (SF-1120 only)

Used to ventilate and cool the ADU section.

Used to drive the ADU section

DC brushless

DC brush

Stepping

DDM

PAM1

PAM2

Matching motor (SF-1120 only)

Used to drive the ADU matching disk

Stepping

3 – 4

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4. PWB (Explained with the SF-1120 and the SF-CM15)

Name

Operation PWB A

Blank lamp PWB

Optical PWB

Main PWB

Description

Name

Description

Operation input, display control

Used to control the blank lamp.

Operation PWB B

DL PWB

Operation input, display control

Used to drive the discharge lamp.

Used to sense the toner density.

AC power input

AE sensor and lens motor interface

Used to control the body.

Process control PWB

AC circuit PWB

CSD PWB

Used to sense the body cassette

size.

DC circuit PWB

DC power input

Paper feed power PWB

(SF-CM15)

Used to supply power to drive the

paper feed unit.

Motor control PWB

Used to drive and control the

paper feed motor and the

transport motor.

CSD B PWB

Used to sense the cassette size of

2nd ∼ 4th tray.

Vertical transport of 2nd ∼ 4th

cassette, JAM detection, paper

feed clutch interface

Motor sensor PWB

DPPD PWB

Encoder for 2nd ∼ 4th paper feed

motor

Tray module PWB

Vertical transport of 2nd ∼ 4th tray,

JAM detection and cover open

detection

ADU PWB

PPD PWB

ADU control

PID PWB

Manual paper entry detection

Body PR roller JAM detection

High voltage PWB

Process high voltage, developing

bias voltage supply

PDD PWB

Body paper exit section JAM

detection, ventilation fan motor

interface

Paper feed I/F PWB

I/F of copier paper detection and

the paper feed clutch.

Sub DC power PWB

Used to supply power in the power

save mode. (5V is supplied to the

main PWB and the operation

PWB.)

3 – 5

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5. Sensors and switches (Explained with the SF-1120 and the SF-CM15)

20 21 22

For the ADU sensor, refer to page 5-18.

Operation, function

No.

Signal name

Name

Type

1 TCS

2 ILSW

3 MSW

4 TH

Toner density control sensor

Front cabinet open/close switch

Power switch

Fusing heater thermistor

Fusing heater thermostat

Transmission sensor

Interlock switch

Seesaw switch

Thermistor

HIGH when toner density falls.

ON when closed.

Greater resistance at low temperature

Contact open at abnormally high

temperature

5 TS

Thermostat

6 POD

Paper exit paper sensor

Mirror home position sensor

Main motor encoder

Waste toner full switch

Lens home position sensor

Paper transport sensor

Transmission photo sensor LOW when paper is present.

Transmission photo sensor HIGH when paper is sensed.

Transmission photo sensor Rotation pulse output

7 MHPS

8 MMRE

9 TFD

F LHPS

G PPD

Lead switch

HIGH when sensed.

Transmission photo sensor LOW when reduction.

Transmission photo sensor LOW when paper is present.

H 1 CSD0 ∼ 2

I 2 CSD0 ∼ 2

J 3 CSD0 ∼ 2

K 4 CSD0 ∼ 2

L PED1

Body upper tray paper size detection (SF-1020 only)

Body lower tray paper size detection

Option upper tray paper size detection @1

Option lower tray paper size detection @2

Tact switch

Shorted when the switch is turned on.

Body upper tray paper presence detection (SF-1020 only) Transmission photo sensor HIGH when paper is present.

M PED2

N PED3

O PED4

Body lower tray paper presence detection

Option upper tray paper presence detection @1

Option lower tray paper presence detection @2

Transmission photo sensor HIGH when paper is present.

Transmission photo sensor Rotation pulse output

Transmission photo sensor LOW when paper is present.

Transmission photo sensor LOW when the side door is open and

paper is present.

P Motor sensor 2 Body lower stage paper feed motor encoder sensor

Q Motor sensor 3 Option upper paper feed motor encoder sensor @1

R Motor sensor 4 Option lower paper feed motor encoder sensor @2

S DPPD1

T DPPD2

Body upper tray paper transport sensor

Body lower tray paper transport sensor

U DPPD3

Option upper tray paper transport sensor

Option lower tray paper transport sensor

Transmission photo sensor LOW when the option door is open

and paper is present.

Transmission photo sensor LOW when the option door is open

and paper is present.

V DPPD4

W PID

Single manual feed paper entry sensor

OC cover open/close sensor

Original size sensor

Drum mark sensor

Toner patch density sensor

Transmission photo sensor HIGH when paper is present.

Transmission photo sensor OC cover open/close detection

X OCSW

Y ORS

Z DMS

[ IDS

Photo transistor

Reflection sensor

Original size detection

Drum mark detection

Toner patch density detection

@1: SF-CM15, SF-CM16

@2: SF-CM15 only

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3 – 6

6. Rollers, mirrors, etc.

29 28

20 19

ADU

43 42

No.

[

‘

Name

No.

Name

No.

Name

No. 3 mirror

Copy lamp

No. 6 mirror

—

No. 2 mirror

No. 4 mirror

No. 1 mirror

No. 5 mirror

Manual tray

Developing unit toner box

Take-up roller

Paper feed roller

PS front roller

Reverse roller

Developing unit

PS front roller follower roll

Blank lamp

Main charger unit

Resist roller follower roll

Separation charger

Suction belt

Photoconductor drum

Resist roller

Cleaner unit

Transfer charger

Suction unit

Drum separation pawl

Fusing thermistor

Lower heat roller

Heater lamp

Upper heat roller

Tray paper feed roller

PE actuator

Developing magnet roller

Tray paper feed reverse roller

Tray paper feed take-up roller

Transport roller (lower)

Tray paper feed take-up roller

Take-up roller

Transport roller (lower) follower roller

Tray paper feed roller

Tray paper feed reverse roller

Reverse roller

Paper feed roller

@ Since \, ], _ ~ g are the same as in the SF-CM15 (option), they are omitted.

3 – 7

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2 Avoid high temperature and high humidity, and avoid sudden

temperature change. (Avoid installation near a cooler or a heater.)

If not, paper absorbs moisture and dew forms in the machine,

causing paper jam or degraded image quality.

[4] UNPACKING AND INSTALLATION

1. Unpacking

(Standard condition): The best condition to use the machine.

20 ∼ 25°C: 65±5%RH

(Temperature and humidity): 15 ∼ 30°C

20% ∼ 85% RH

35°C for 65%

Humidity

30 35 ˚C

Packing material/accessory list

Name

Paper exit tray

Q’ty

3 Avoid dust and vibrations.

If dust enters the machine, malfunctions may occur.

Instruction manual

Maintenance card

Dust cover

Service contract

Installation manual

Magnification ratio select label

2. Installation

Installing conditions

The surrounding conditions of the machine affect the machine perfor-

mance greatly. Use great care for the following items.

4 Avoid installation to an unstable place.

Keep the machine in horizontal state to maintain the performan-

ces.

(1) Environment

1 Avoid direct sunlight, and avoid installation near the window. (Cur-

tains or blinds must be shut completely.)

If not, the plastic parts and the original cover may be deformed.

Even if the window is of frosted glass, there is no difference.

4 – 1

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5 Avoid installation to a poorly ventilated place.

(5) Grounding wire connection

1 Connect the grounding wire to prevent against a danger.

2 When connecting the grounding wire, connect only to the ground-

ing object (the grounding terminal of the power outlet, etc.) and

never connect to a gas pipe.

6 Avoid installation to a place where there are flammable materials

or ammonia gas, etc. If the machine is installed near a diazo

copier, the picture quality may be degraded and malfunctions may

occur.

Grounding

terminal

7 Install near a power outlet.

(2) Space around the machine

Install the machine with its rear side about 10cm apart from the wall in

order to allow space to ventilation by the cooling fan.

Also allow enough space around the machine for proper operation.

(3) Installation base

Set the machine in horizontal position in the following procedure.

Be sure to use a leveling instrument (UKOGM0054CSZZ) to install

the machine on a flat, horizontal place.

(Note) If the machine is not in horizontal position, the toner density

control function may not work normally, resulting in degraded

picture quality.

(4) Power source

1 Use the power source of the rated capacity.

2 Avoid complicated wiring. If not, the breaker or the fuse may be

overloaded.

4 – 2

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3. Optical system lock release

4. Charger cleaning

A. No. 2/3 mirror unit lock release

A. Main charger unit electrode cleaning

Remove the one fixing screw of the No. 2/3 mirror unit on the left side

of the copier.

1 Press the hook section of the main charger unit to release lock,

and pull out and remove the main charger unit from the copier.

Hook

Mirror unit

fixing screw

main charger unit

2 Remove one fixing screw of the main charger unit (on the back

side).

Fixing screw

Electrode section

B. Lens and No. 4/5 mirror unit lock release

Remove two fixing screws of the No. 4/5 mirror unit on the right inside

of the copier.

Open the front cabinet and remove one fixing screw of the lens on the

lower side of the operation panel.

Lens fixing screw

Main charger unit

3 Press the electrode cleaner onto the tips of the electrode so that

the tips are inserted into the cleaner a few times to clean.

(Note)

• Do not move the cleaner back and forth with the electrode tips

inserted into it.

• When cleaning, clean thoroughly at one time. Avoid partial

cleaning.

Mirror unit

fixing screw

Paper feed tray

Electrode cleaner

Electrode section

4 – 3

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4 Return the electrode section to the original position and fix it with a

3 Remove three fixing screws of the toner hopper of the developing

screw.

unit, and remove the toner hopper.

5 Insert the main charger unit along the guide groove in the copier

fully to the bottom.

Fixing screw

Toner hopper

Fixing screw

Developing unit

Main charger unit

4 While supplying developer from the developer supply port of the

developing unit, turn the MG gear clockwise with a screwdriver or

a scale to supply fully in the developing unit.

5. Developing unit setting

A. Developing unit setting

1 Open the front cabinet, remove the installation toner fixed to the

developing unit level with tape, and pull the developing unit lever

toward you.

Developer

supply port

Developing unit

lever

Front cabinet

Developing unit

MG gear

Developing unit

5 Install the toner hopper to the developing unit and fix it with two

screws.

2 Hold the grip of the developing unit, and slowly pull out the

developing unit until it stops.

Then hold the hand carry strap and press the developing lever,

and remove the developing unit.

Fixing screw

Toner hopper

Fixing screw

Hand carry strap

Developing unit

Grip

DV lever

4 – 4

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6 Hold the hand carry strap of the developing unit and insert it into

7. Accessory installation

the copier fully to the bottom.

A. Copy tray installation

Install the copy tray to the paper exit section on the left side of the

copier.

Hand carry strap

Developing unit

Grip

7 Close the developing unit lever and close the front cabinet.

Copy tray

Developing unit lever

Front cabinet

8. Toner supply

1 Open the front cover.

With the above procedure, setting of the developing unit is com-

pleted.

6. Toner density sensor level adjustment

2 Pull down the developer unit lock lever and pull the developer unit

out slowly unit it stops.

Turn on the copier power switch.

A. Developing unit level adjustment

1 Execute simulation 25.

2 After 3 minutes, simulation 25 is completed.

(Note) If the simulation is terminated halfway, automatic reading

is not performed. Do not terminate it halfway.

3 Cancel simulation 25 with the CA key.

4 – 5

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3 Hold the new toner bottle as shown and shake it four or five times.

6 Close the toner hopper cover.

4 Open the toner hopper cover.

7 Slide the developer unit into the copier.

8 Return the developer unit lock lever into place.

5 Pour the toner evenly into the toner hopper.

9 Close the front cover.

4 – 6

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9. Center shift adjustment

10. Label attachment

There is basically no need to perform the center shift adjustment

because it is made when shipping. If the center should be shifted,

adjust in the following procedures.

Make a copy. If the center is shifted as shown in Fig. 1 or Fig. 2,

loosen the four screws which are fixing the cassette grip cabinet.

A. Label attachment

Attach the magnification ratio select label packed together with the

Operation manual to the position shown in the figure below.

• When attaching the label to the copier with the original cover.

Magnification ratio select lable

Section b

Section a

Section b

Section a

Direction A

Direction B

(Note) When fixing the cassette cabinet, the fixing screws and the

cabinet clearance a and b are in symmetry.

[Reference figure]

Section b

Section a

• When attaching the label to the optional automatic original feeder

(SF-A15)

Magnification ratio select lable

(1) Fig. 1

Move the cassette grip cabinet in direction A, tighten two fixing

screws (a) and tow fixing screws (b) in this sequence. Make a copy

again and check the center.

Paper center line

[Fig.1]

Image center line (First image)

(2) Fig. 2

Move the cassette grip cabinet in direction B, tighten two fixing

screws (a) and tow fixing screws (b) in this sequence. Make a copy

again and check the center.

Paper center line

[Fig.2]

Image center line (First image)

4 – 7

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3 The following procedure must be performed by two persons.

11. Optional two-step paper feed unit

(SF-CM15) installation

Hold the grips of the copier, and insert the positioning bosses (2

positions) of the two-stage paper feed unit into the positioning

holes (2 positions) on the bottom of the copier. Then put the four

legs of the copier on the two-stage paper feed unit.

Grip

Parts packed together

Grip

Positioning boss

Connection

adjustment plate

x 1 pc.

Connection

screw A

x 2 pcs.

Connection

screw B

x 1 pc.

Connection

screw C

x 2 pcs.

4 While lifting the lower stage tray slightly, pull it out until it stops.

Then hold the both sides of the tray and lift and remove it.

Disconnect the power plug of the copier and

perform the following procedures.

1 Remove two screws which are fixing the rear cabinet on the lower

stage of the copier, and remove the rear cabinet.

5 Attach the connection adjustment plate as shown in the figure and

fix it with two screws A. Then fix the left side with screw B.

Install the paper tray which was removed in procedure 4 to the

copier.

Fixing screw

Rear cabinet

2 Remove the notched section of the lower stage of the copier.

Connection

adjustment plate

Connection screw B

Connection screw A

Notched section

4 – 8

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Connect the rear side of the copier with two connection screws C.

12. Optional one-step paper feed unit

(SF-CM16)

Connection screw C

Included parts

6 Remove the connecter which is fixed to the rear cabinet of the

two-stage paper feed unit with tape. Connect the 4P connector

and 10P connector with the 4P connector and 16P connector of

the copier.

Securing fixture

(1pc)

Mounting

screws "A"

(2pc)

Mounting

screws "B"

(1pcs)

Mounting

screws "C"

(2pcs)

4P connector

16P

connector

Disconnect the plug to the main copier unit before

performing the following procedures.

1. Removing the rear cover to the main copier unit’s

lower tray

Remove the two securing screws which hold in place the cover to the

main copier unit’s lower tray, then remove the rear cover.

connector

Fixing tape

7 Install the rear cabinet which was removed in procedure 1 to the

original postilion, and fix it with two screws.

Rear

cabinet

Rear cover

Securing screws

2. Removing the cut-out from the lower tray of the main

copier unit

Remove the cut-out from the bottom of the main copier unit.

Fixing screw

8 Adjust according to "9. Center shift adjustment" in [4] UNPACK-

ING AND INSTALLATION.

Cut-out

4 – 9

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3. Placing the main copier unit over the paper feed unit

[Note]

• The following procedure should always be performed by two per-

sons.

Lift the main copier unit by the grips and slip the two positioning

holes on the bottom of the main copier unit over the two position-

ing bosses on the paper feed unit, then set the four feet on the

main copier unit in their proper places on the paper feed unit.

Grips

Securing fixture

Mounting screw "A"

Mounting screw "C"

Mounting screw "B"

Grips

Positioning bosses

Mounting screw "C"

Grips

Positioning bosses

6. Plugging in the relay harness

Remove the tape holding the connector to the rear cover of the paper

feed unit, then plug the 4P and 16P connectors into the correspond-

ing connectors on the main copier unit.

4. Removing the lower tray from the main copier unit

While lifting up slightly on the main copier unit’s lower tray, pull it out

gently as far as it will go.

Then lift up on it a little bit with both hands to remove it from the

copier.

4P connector

16P connector

Tape

5. Attaching the main copier unit and paper feed unit

4P connector

Orient the protrusions on the securing fixture (one of the included

parts) toward yourself as shown in the illustration and attach it with

the two mounting screws "A".

Then attach the left side with the mounting screw "B".

Finally, reinsert in the main copier unit the tray that was remove in

step 4.

7. Mounting the rear cover to the main copier unit’s

lower tray

Put the rear cover, which was removed in step 1, back where it came

from and secure it with its two securing screws.

Attach the rear side of the main copier unit to the paper feed unit

using the two securing screws "C".

Securing screws

Rear cover

Securing screws

4 – 10

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8. Set the mode.

Plug the copier into a grounded outlet and turn the power switch

on.

Center line of copy paper

• Operate the keys on the copier to set the mode.

Center of copy image (before adjustment)

• When copies come out off center as shown in figure 2

Move the front part of the tray in direction B, tighten first the two

"a" securing screws then the two "b" securing screws, then make

another copy to check whether the copies come out properly

centered.

The above key operation will display the currently set mode.

• Immediately after the above key operation, operate the keys as

follows:

13. Tray paper size selection

(Described with the SF-1020)

Select the necessary size according to the following procedures.

(A5 size paper is treated as a special size. When shipping, the size is

set to A3.)

9. Centering the paper

The paper trays are adjusted at the factory, so there should be

no need to center the copy paper yourself. If such an adjustment

is necessary, however, follow the procedures described below.

Make a copy. If it comes out off center as shown in either figure 1 or

figure 2 below, loosen the four screws which hold the front part of the

tray in place.

1. Fit the partition plates in the tray according to the

paper size (horizontal and vertical).

Be sure to fit with the paper scale position.

Partition plate A can be slid. Hold the fixing grip and slide it to the

proper paper size position.

Partition plate B is of insert-type. Remove it and insert to the suitable

paper size position.

Direction "A"

Fixing grip

Direction "B"

[Schematic illustration]

Partition plate (A)

Partition plate (B)

2. Remove the tray.

Pull out the tray completely toward you and tilt upward and remove.

[Note] When tightening down the front part of the tray, the two "b"

securing screws must be the same distance from the front

part of the tray. This requirement also applies to the two "a"

securing screws.

• When copies come out off center as shown in figure 1

Move the front part of the tray in direction A, tighten first the two

"a" securing screws then the two "b" securing screws, then make

another copy to check whether the copies come out properly

centered.

Center line of copy paper

Center of copy image (before adjustment)

4 – 11

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3. Remove the size block upward, and fit to the suitable

paper size.

A3 size

B4 size

A4 size

Hole

B5 size

size

A4R

B5R

Hole

Hole Hole

A5 size

When the size is changed to A5, fit

the size block display to"Special."

Special

Hole Hole

Caution

• When the tray paper size is changed, be sure to change the size

block.

If not, the paper size display lamp keeps indicating the previous

size.

4. Attach the tray.

Reverse the removing procedure of the tray. (Tilt upward and insert

the tray then push it into the machine.

5. Set paper, and change the paper size display.

Remove the paper size display plate, and insert it so that the selected

paper size is visible from the paper size display slit.

When A5 size is selected, set to "Special."

4 – 12

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In the case of SF-1020:

[5] DESCRIPTIONS OF EACH

SECTION

The SF-2020 is provided with the three-way paper feed system. The

tray is of the universal type and has capacity of 250 sheets. The front

loading system allows the tray to be loaded from the lower side of the

front cabinet.

(The SF-1120 has the two-way paper feed system with one 250-sheet

tray and manual feed.)

Descriptions are made on the following sections:

1 Paper feed section

The tray has the capacity of 500 sheets (250 sheets for the SF-1120).

In addition to that, the optional paper feed unit allows loading of 500

sheets more for the SF-CM15 (250 sheets for the SF-CM16).

2 Developing section

3 Optical section

4 Process section

2) Basic operations

5 Separation/transport section

6 Fusing/paper exit section

7 High voltage section

(Tray paper feed operation)

When the CPFC (Cassette paper feed clutch) turn on, the paper feed

roller shaft, the paper feed roller, and the take-up roller rotate in the

direction of A. At the same time, the limiter spring moves down the

roller release arm. As a result, the take-up roller falls by its own

weight onto the paper surface, starting paper feed.

8 ADU section (SF-1120 only)

Roller release arm

Take-up

roller

Paper feed roller

Paper feed roller shaft

When the CPFC turns off, rotation stops and the take-up roller is

pushed up to the original position by the roller release arm spring.

SF-CM15

(Option)

1. Paper feed section

1) General descriptions

(Multi manual paper feed operation)

To realize the compact design, the front loading system and the fol-

dable multi paper feed unit are employed.

Use of the optional two-stage paper feed unit for the SF-CM15 (one-

stage paper feed unit for the SF-CM16) and the spare tray allows a

variety of system configurations.

When the MPFS (multi paper feed solenoid) turns on, the spring

clutch rotates to press the take-up roller on the paper, feeding the

paper.

(System configuration) Example with the SF-1020:

SF-1020

50 sheets

250 sheets

SF-UB15

(Spare tray)

SF-CM16

(One-step paper feed unit)

250 sheets

SF-CM15

(Two-step paper feed unit)

5 – 1

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2. Developing section

(Details of DV harness connector)

For color identification

For bias

1) General descriptions

(1) Two-component developer

The developer is composed of toner and carrier.

Carrier serves as a medium for attaching toner onto the electrostatic

image on the photoconductor drum.

GND

By stirring toner and carrier, they are rubbed to be charged positive

(+) and negative (–) respectively.

Since developer will deteriorate to degrade copy quality, it should be

replaced regularly.

Resistor

(2) Two-component magnetic brush development

*For toner density sensor

The rotatable non-magnetic sleeve is provided over the magnet roller

and is rotated.

Carrier forms a magnetic brush on the sleeve surface by magnetic

force to attach toner onto the electrostatic image on the photoconduc-

tor drum.

GND

*Resistance value is identified by color

(3) Developing bias

When the photoconductor is charged and exposed to light (ex-

posure), the surface potential (voltage) of the photoconductor will not

be lost completely. (The residual potential remains.)

2) Basic composition

Toner is attracted to the photoconductor by this residual potential,

dirtying the photoconductor. As a result, a dirty copy of white back-

ground is generated.

To prevent against this, a voltage of the same polarity and higher than

the residual potential is applied to the MG roller, preventing toner from

being attached to the photoconductor surface.

Residual potential < DV BIAS

MG roller

DV BIAS

-200V

Toner

Carrier

No.

Name

Magnet roller

Forms a magnetic brush of carrier

by magnetic force.

Developing bias voltage

Developing doctor blade Limits the height of the magnetic

brush.

Developing MIX roller

Stirs carrier in the developing unit

and distributes toner evenly.

(4) DV harness

The toner density sensor, the developing bias, and the developing

unit identification resistance harness.

(For details, refer to [6] DISASSEMBLY AND ASSEMBLY.)

Toner transport roller

Transport toner sent from the

toner hopper unit to the stirring

section.

Toner density sensor

Senses

developer.

toner

density

(Viewed from the rear of develoing unit)

DV harness connector

5 – 2

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3) Basic operations

(Cassette paper feed)

Proccess

unit

Main motor

Fuser unit

When the CPFC (cassette paper feed clutch) is turned on, the paper

feed roller shaft, the paper feed roller, and the take-up roller rotates in

the direction of A, and the roller release arm is moved downward by

the limiter spring. As a result, the take-up roller falls by its weight to

reach the paper surface, feeding the paper. When the CPFC is turned

off, the take-up roller is pushed up to the position by the roller release

arm spring.

Main drive unit

Stirring roller

MG roller

DV drive unit

Cleaner

unit

Transport

unit

PS roller

Paper exit

roller

Multi manual

insertion paper

feed unit

(Option)

Transport

roller(upper)

Transport

roller(lower)

Paper feed

rive unit

Paper feed

unit

Paper feed

unit

(3) Optical section

1. General description

• The optical section of this model is composed of the fixed focus

lens and six mirrors. Since the fixed focus lens is used, No. 4/5

mirror base is shifted according to the shift of the lens to change

the distance between the original and the drum (OID, Original

Image Distance) in reduction or enlargement copy.

• Exposure is adjusted by changing the copy lamp voltage. The AE

sensor is provided in the zoom base to sense the density of the

original.

The copy lamp light is reflected by the original to the AE sensor,

which senses the density of the original and adjust the copy lamp

light quantity according to the density.

The lens and No. 4/5 mirror unit are shifted by driving the stepping

motor with the signals from the main control PWB, allowing zoom-

ing of 151 steps in 1% increment in the range of 0.50 to 2.00.

• The exposure system is the slit exposure system by moving light

source.

Copy lamp

No. 2 mirror

No. 4 mirror

Reflector

No. 1 mirror

No. 3 mirror

No. 5 mirror

Lens

No. 6 mirror

No. 2/3 mirror base unit

Mirror motor

Copy lamp unit

No. 4/5 mirror base unit

Lens home position sensor

Lens/No. 4/5 mirror base drive motor

Mirror home position sensor

Automatic exposure (AE) sensor/

Optical system dirt sensor

5 – 3

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(1) Original table

(2) Copy lamp

The original table is fixed. The original is set in the left center position.

100V series: 85V, 275W

200V series: 170V, 310W

(3) Mirror

This model uses six mirrors.

No. 1 mirror is attached to the copy lamp unit, No. 2/3 mirrors are

attached to No. 2/3 mirror base, No. 4/5 mirrors are attached to No.

4/5 mirror base.

The copy lamp unit and the No. 2/3 mirror base unit are scanned in

copying. The No. 4/5 mirror base is shifted in zoom copying to

change the distance between ten original and the drum.

(4) Lens (fixed focus lens)

• Construction (1 group 3 lenses)

• Brightness (F8.5)

• Focus: (195mm ±1%)

(5) Lens home position sensor (LHPS)

This sensor senses the lens home position. The output signal of this

sensor is the basic signal to control the copy magnification ratio.

(6) Lens base

The lens is mounted to the lens base, which is shifted toward the

paper feed direction in reduction copy or toward the paper exit direc-

tion in enlargement copy by the lens drive motor.

Mirror base scan speed is changed for zooming

Enlargment

Normal

Zooming by changing the lens

and mirror position

Original

Reduction

Copy direction

5 – 4

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Parts identification and functions

Mirror home position sensor

Lens home position sensor

Lens No. 4/5 mirror unit

drive motor

Mirror motor

AE sensor

No. 2/3 mirror unit

Reflector

Copy lamp

Copy lamp unit

Lens drive wire

No. 4/5 mirror unit

Lens

unit

Mirror base wire

Temperature fuse

(7) Lens drive shaft

(14) Temperature fuse

This shaft controls the optical axis of the lens in zoom copy. The lens

follows along the slide base shaft.

This is attached closely to the reflector to prevent against abnormal

temperature rise in the optical system. If the temperature rises abnor-

mally, it turns off the copy lamp power directly.

100V series (117°C)

(8) Lens drive wire

This is to shift the lens unit and the No. 4/5 mirror base.

200V series (117°C)

(9) No. 4/5 mirror unit

(15) Reflector

No. 4/5 mirrors are attached to this unit. It is shifted by the lens drive

motor to change the distance between the original and the drum

according to the zooming ratio.

Light from the copy lamp is reflected by the reflector to the original.

(16) Exposure adjustment plate

Four exposure adjustment plates are attached to the copy lamp unit

to adjust exposure balance in back and forth direction of the frame.

(10) Mirror motor

This stepping motor shifts the copy lamp unit and the No. 2/3 mirror

base. It is rotated at the rpm according to each zooming ratio.

(17) Mirror base drive wire

This wire transmits the mirror motor power to the copy lamp unit and

the No. 2/3 mirror base to scan the mirror base.

(11) Mirror home position sensor (MHPS)

This sensor senses the home position of the copy lamp unit. It is of

light transmission type.

(18) Lens drive motor

This stepping motor drives the lens and the No. 4/5 mirror base.

(12) No. 2/3 mirror unit

(19) AE sensor

No. 2/3 mirrors are attached to this unit. It is scanned by the mirror

motor.

This AE sensor senses the original density by the light emitted from

the copy lamp and reflected by the original, controlling the developing

bias. The photometric area is about 100m width at the center and in

the mirror base scanning direction.

(13) Copy lamp unit

This is composed of No. 1 mirror, the temperature fuse, the copy

lamp, the exposure adjustment plate, and the reflector, and scanned

by the mirror motor.

The element is photo diodes.

5 – 5

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(20) Original size sensing

Mirror base scan speed

The original size is sensed by the original interruption system.

The LED in the rear frame side emits light to the table glass surface.

The original interrupts this light, and its size is detected.

Lens and mirror positions

are changed to adjust the

magnification ratio

Light emit

Table glass

Copy paper

feed derection

Mirror scan speed is cahnged to adjust the magnification ratio

Mirror scan speed Drum rotation speed<Mirror scan speed

Enlargement

Light receiving

2. Basic operations

(Positions of the original, the lens, and the image in each mag-

nification ratio)

Normal: The distance between the original set on the table glass and

the lens is equal to the distance between the lens and the

drum, resulting in the equal size of the original and the

image.

Original

Reduction

(Copy lamp control in each copy density)

[MAX. 83V(166V)]

Enlargement: Compared to the normal copy, the lens is nearer to the

original and the distance between the original and the

lens is shorter.

The distance between the No. 4/5 mirror unit and the

lens is greater, and the distance between the lens and

the drum is also greater.

CLV

(Copy lamp

application

voltage)

The distance between the original and the exposure

surface of the drum is greater than that in the normal

copy.

[MIN. 45V(90V)]

(V)

EX1

EX5

Execute Sim 46-01 to determine the copy lamp application voltage

(CLV) in EX1 and EX5.

Then divide the difference between the voltages of EX1.0 and EX5.0

into nine.

The application voltage of the copy lamp in each exposure level is

determined by varying the ON timer duty of the copy lamp ON control

signal.

Reduction: Compared to the normal copy, the lens is nearer to the

drum, and the distance between the original surface and

the lens is longer.

• Photo density copy mode

The distance between the lens and the exposure surface

of the drum is shorter.

The distance between the No. 4/5 mirror unit and the

lens is greater.

The distance between the original and the exposure sur-

face of the drum is greater than that in the normal copy.

Make the same control procedures as the manual density copy

mode.

The image density is controlled by lowering the grid bias voltage of

the charging charger. To maintain the reproduction quality in half

tone, the ON time duty of the copy lamp ON signal is made shorter

than in the manual density copy mode. (The application voltage is

lower.)

5 – 6

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(Optical system dirt correction)

Reference plate (Glass holder)

Table glass

This model perform dirt correction by changing the copy lamp inten-

sity according to the dirt degree in the optical system (the copy lamp

unit, No. 1 mirror, No.2 mirror, No.3 mirror) to prevent against remark-

able degrading of copy quality.

The reference value is the AE sensor output value which is obtained

when the reference plate is exposed with the copy lamp voltage of

67.0V (134.0V) at power ON.

Copy lamp light quantity "UP"

This value is checked with sim 44-08, 09.

Automatic exposure

sensor

CPU

Reference value

>Measured value

Correction data output

CLV

Sim46

CL(V) = INI CL(V) + (0.33 x 2)

1step = (0.33 x 2)

100

200

300

400

79.8K

80K

CLV + (0.7)

(1) Setting the reference value for optical system correction.

(2) Dirt correction

Reference plate (Glass holder)

Table glass

Copy lamp light quantity "UP"

Automatic exposure

sensor

Automatic exposure

sensor

CPU

CPU reference value

setting

Reference value

>Measured value

Correction data output

1 Measure light quantity when performing mirror initialization.

2 Store the correction data into memory.

1 Clean the optical system at every maintenance.

2 Perform Simulation 46-1.

(The previous data are cleared.)

3 Reset the register inside the CPU.

3 After completion of Simulation 46-1, when performing the first

mirror initialization, measure light quantity of the copy lamp.

Obtain the average value from the four measurement values and

use the average value as the reference value for correction.

800ms

Light quantity

measurement

Obtain the average value of four AE sensor values, and store it.

5 – 7

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(4) Copy process

This model basic process and structure

• The Scorotron method is used to evenly charge the photoconduc-

tor surface to the given potential in the charge process. The

corona wire regularly used is now replaced with a new corona

charge mechanism that employs the 0.1mm thick stainless steel

saw teeth plate, in order to suppress ozone generated when the

oxide molecule in air is ionized.

• Considering the service efficiency, the process separation

mechanism is adopted.

• To prevent high voltage leakage by the loose corona charge unit, a

one-touch stopper mechanism is adopted.

Proccess

Main motor

unit

Main drive unit

Stirring roller

DV drive unit

Fuser unit

MG roller

Cleaner

unit

Transport

unit

PS roller

Paper exit

roller

Multi manual

insertion paper

feed unit

(Option)

Transport

roller(upper)

Transport

roller(lower)

Paper feed

rive unit

Paper feed

unit

Paper feed

unit

(1) Photoconductor

• This model uses OPC (organic photoconductor) as photoconduc-

tive material. (φ50 mm)

OPC layer

CTL (Electric charge moving layer)

CGL (Electric charge generating layer)

Aluminum layer

5 – 8

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(2) Process diagram

Original

Mirror lens

Exposure

Copy lamp

High voltage unit

Blank lamp

Main corona unit

Charging

Discharge lamp

Discharging

Discharge

High voltage unit

Toner

Development

Developer

Cleaning blade

Cleaning

Waste toner collection

Separation

Manual paper feed

Paper cassette

Drum upper

image/paper

synchronization

Paper feed roller

Transportroller

Resist roller

Paper exit

Fusing

Separation

Transfer

Separation corona unit

High voltage unit

Heat roller

Transfer charger

High voltage unit

Image forming process

Paper transport path

Heater lamp

Blank lamp

Main corona unit

Discharge lamp

Cleaning blade

Developer unit

MG roller

Resist roller

Seperation pawl

Seperation corona unit

Transfer corona unit

5 – 9

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(3) Details of image forming process

Step 1 (Main Charging)

By negative discharging of the main charger, uniform negative char-

ges are applied to the OPC drum surface.

The OPC drum surface potential is controlled by the screen grid

voltage to maintain the grid voltage at a constant level.

• When the drum surface potential is lower than the grid voltage,

electric charges generated by discharging of the charger go

through the screen grid to charge the drum surface potential until it

becomes equal to the grid voltage.

• When the drum surface potential virtually reaches the grid potential

level, electric charges generated by discharging of the charger

flows through the electrode of the screen grid to the high voltage

unit grid voltage output circuit, thus always maintaining the drum

surface potential at a level virtually equal to the grid voltage.

• The main corona unit employs the scorotron system to charge the

photoconductor surface to a certain level uniformly.

In addition, the conventional corona wire is replaced with the

corona charging mechanism by saw-teeth plate (stainless steel

plate of 0.1 mm thick). In corona discharge, oxygen molecules in

the air are ionized to generate ozone (O₃). The mechanism restrict

the generation of ozone.

Main corona unit

Blank lamp

Main corona unit

High voltage unit

Discharge lamp

Cleaning blade

Screen grid

Developer unit

MG roller

CTL

Resist roller

CGL

OPC drum

Seperation pawl

Seperation corona unit

Aluminum

layer

Transfer corona unit

Step 2 (Exposure)

Light from the copy lamp is radiated on the document, and the optical

image of the document is reflected by the mirrors and projected

through the lens to the OPC drum.

On the contrary, electric charges are generated more in the CGL

layer corresponding to the darker density of document (lower intensity

of the OPC drum surface), and less quantity of the negative charges

on the CPU drum surface is neutralized, decreasing the OPC drum

surface less. Therefore, the OPC drum surface potential correspond-

ing to the lighter portion of the document is lower, and that cor-

responding to the darker portion of the document is higher. Latent

static-electricity images are formed in the above manner.

The lighter portion of the document reflects more light (high intensity)

to the OPC drum, and the darker portion of the document reflect less

light (low intensity) to the OPC drum. Positive or negative charges are

generated in the CGL of the OPC drum where lights are radiated.

Negative charges generated in the CGL move towards the positive

charges in the aluminum layer generated in step 3. While the positive

charges in the CGL move towards the negative charges on the CPU

drum surface generated in step 3. Therefore, positive charges and

negative charges are neutralized in the aluminum layer and the OPC

drum surface at the light radiating position, decreasing the OPC drum

surface potential. The CGL electric charge generating amount in-

creases in proportion to the document density, that is, reflected light

intensity (the OPC drum surface intensity). Therefore, electric char-

ges are generated less in the CGL layer corresponding to the lighter

density of document (higher intensity of the OPC drum surface), and

a greater quantity of the negative charges on the OPC drum surface

is neutralized, decreasing the OPC drum surface potential more.

5 – 10

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Low intensity in

the area corre-

sponding to the

darker density

portion of the

document

HIgh intensity in

the area corre-

sponding to the

lighter density of

the document

Medium intensity

in the area corre-

sponding to the

medium density

portion of the

document

CTL

CGL

Blank lamp

Main corona unit

Aluminum

layer

Discharge lamp

Cleaning blade

OPC drum

Developer unit

MG roller

Surface potential

(High)

Surface

potential

(Medium)

Surface

potential

(Low)

CTL

CGL

Resist roller

Seperation pawl

Seperation corona unit

Aluminum

layer

Transfer corona unit

OPC drum

Step 3 (Development)

Toner is attached to the latent static-electricity images on the drum

surface to change them to visible images. The two-component mag-

netic brush development system charges toner positively by friction

with carriers, and toner is attached to negative charges on the drum

surface. The potential in the darker document projecting area (low

intensity) is high (much negative charges) and attracts more toner.

The potential in the lighter document projecting portion (high intensity)

is low (less negative charges), and attracts less toner.

OPC drum

Aluminum layer

CGL CTL

Blank lamp

Main corona unit

Higher surface

potential

(Much negative

(charges)

Discharge lamp

Cleaning blade

Developer unit

Medium surface

potential

(Less negative

(charges)

MG roller

Resist roller

Lower surface

potential

(No negative

(charges)

Seperation pawl

Seperation corona unit

-200V

Transfer corona unit

High voltage unit

bias voltage

At that time, a bias of –200V is applied to the MG roller (magnet

roller), which is provided for preventing toner from being attracted by

the residual voltage (about –80V to –100V) in the lighter portion after

exposure.

5 – 11

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Step 4 (Transfer)

The transfer paper is charged higher than the OPC drum surface

potential by strong negative discharge of the transfer charger, making

the binding force between the transfer paper and toner stronger than

that between the drum and toner, attracting toner to the transfer

paper.

Aluminum

layer

Blank lamp

Main corona unit

OPC drum

Discharge lamp

Cleaning blade

CGL

CTL

Toner

Developer unit

MG roller

Transfer paper

Seperation pawl

Resist roller

Transfer corona unit

Seperation corona unit

Transfer corona unit

High voltage unit

Step 5 (Separation)

After transfer, the copy paper and the drum are negatively charged.

Since, however, the negative potential of the copy paper is higher

than that of the drum, a attraction force is applied between the drum

and the copy paper. To avoid this, AC corona is applied to the copy

paper by the separation charger to decrease the copy paper potential

to the same level as the drum surface potential. The attraction be-

tween the copy paper and the drum is weakened by this, allowing

separation of the copy paper by its own extending force. If the copy

paper is not separated by the separation charger, it is separated by

the separation pawl mechanically.

Blank lamp

Main corona unit

Aluminum

layer

Discharge lamp

Cleaning blade

OPC drum

CGL

Developer unit

CTL

Toner

MG roller

Transfer paper

Seperation pawl

Resist roller

Transfer corona unit

Seperation corona unit

High voltage unit

5 – 12

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Step 6 (Cleaning)

Residual toner on the drum is removed by the cleaning blade. The

removed toner is sent to the waste toner container by the waste toner

transport screw.

Blade

CTL CGL

Aluminum layer

Blank lamp

Main corona unit

Discharge lamp

Cleaning blade

Developer unit

MG roller

Resist roller

Seperation pawl

Seperation corona unit

Residual toner

OPC drum

Transfer corona unit

Step 7 (Discharging)

When the OPC drum is exposed to the discharge lamp light, positive

and negative charges are generated in the OPC drum CGL. The

negative charges generated in the CGL move towards the residual

positive charges in the aluminum layer, while the positive charges in

the CGL move towards the residual negative charges on the OPC

drum surface. Therefore, the positive and the negative charges are

neutralized in the aluminum layer and on the OPC drum surface,

removing the residual charges on the OPC drum surface. As a result,

the OPC drum surface potential becomes 20V ∼ 30V.

Discharge lamp

Blank lamp

Main corona unit

Discharge lamp

Cleaning blade

Developer unit

OPC drum

Residual charge

MG roller

CTL

CGL

Resist roller

Seperation pawl

Seperation corona unit

Aluminum layer

Residual charge

Transfer corona unit

5 – 13

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(4) Transition of photoconductor surface potential

Develop

Charge

Exposure

Transfer Separate

Clean

-730V

Dark area

Developing bias voltage

-215V

Light area

Residual potential

(5) Photoconductor drum sensitivity correction

In this model, fall in sensitivity due to long use of the photoconductor

drum is corrected by the copy lamp light intensity to prevent against

considerable change in copy quality.

The photoconductor drum sensitivity fall correction is performed as

follows:

(NEW)

(USED)

CTL

CGL

CTL

CGL

Cleaner

Develop

OPC drum

CLV

1step = 0.33

(Sim46)

Sim46

Time (min)

(6) Process control function

[Summary]

The process control function detects the density of the standard toner

image formed on the photoconductor, the density of the initial image

and controls the charging grid voltage so that the same level as the

initial image density is provided.

Mark

That is, the process conditions are established and the high voltage

output and exposure level are controlled to stabilize the toner density.

In this model, the density sensing level is automatically set.

MAin control PWB

CPU density

judgement

High voltage PWB

I/O MC grid

MC grid bias

output (density

correction)

output selection

in each mode

(Light quantity

correction)

5 – 14

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The grid voltage value where the same density level as the refer-

ence level is obtained is displayed by Sim. 44-9 "a". This value is

displayed with 50 as the center in the range of 0 ~ 99 in integer

numbers. The correction for 50 is 0V (–410V), and the correction

for 58 is +30V (–442V).

Process control

1 Toner patch images are formed on the photoconductor surface

under the three process conditions (MC grid bias voltage).

At the first process control, a toner parch image is formed with the

reference grid voltage –410V as the center and ±30V. At the

second or later process control, the MC grid bias voltage deter-

mined at the former process control is used as the center, and a

toner patch is formed under the process condition of ±32V to the

center value.

4 When the MC grid bias voltage is corrected by the process con-

trol, the corresponding light quantity is calculated to control the

copy lamp.

To correct the MC grid voltage, the delta value of the sensitivity

level when the initially recorded reference grid voltage is –440V

and the MC grid voltage where the same density is obtained in

process control is fed back to the MC grid voltage of each mode.

2 Measure the three toner patch images formed in the above and

the drum surface with the process density sensor to obtain the

relations.

Process control timing

In the SF-2035, the process control is performed in the following

timing:

Toner

image

Toner

image

Toner

image

Surface

472V

440V

1 When the main switch is turned on and the first copy is made:

2 At every specified copy quantity (First copy after 1,000 copies)

Judged by the total counter.

408V

Bias

The correction is reset by Simulation 25-2.

3 After the specified time after turning on the main switch. (First

Drum 1/2 rotation

2/2 rotation

3/2 rotations

copy after 44, 60, 120, 180 min)

Drum marking

In this model, a toner patch image is formed in the same position on

the photoconductor drum surface to improve the accuracy of the

process control.

A marking is provided on the drum and the marking is sensed before

forming a toner patch image. If the marking level is not sensed, the

developing lamp blinks and the trouble code (F2-32) is displayed.

IDPAT

=PV

x 20

IDBAS

=BV

x 20

IDBAS

BVS: Sensor detection level on the photoconductor drum surface

PVS: Sensor detection level with the toner patch image

Obtain the above two levels from the calculation formula and record

them as the reference values.

A. STD BA: Reference level when detecting the drum surface

→ STD BA = BTS x 20

B. STD PA: Reference level when detecting the toner patch image

6mm x 7mm

→ STD PA = PTS x 20

In the density correction, the process conditions are determined

STD PA

so that the ratio of the reference levels

may be maintained at constant.

set in the above

STD BA

3 Obtain the MC grid bias voltage from the reference level ratio.

Basic structure

Photoconductor drum:

(

”ä)

The 65mmφ ground plate of the OPC

drum is on the rear frame side of the drum

unit so that it contacts the drum locator

pin.

ID PAT3

ID BAS3

STD PA

STD BA

ID PAT2

ID BAS2

Blank lamp:

The non-image area is exposed by the

light from the blank lamp to erase the

positive potential outside the drum CTL.

Use of the latchet simplifies the lamp posi-

tion adjustment.

ID PAT1

ID BAS1

Discharge lamp:

Eight bulbs cast light over the drum sur-

face to erase the positive potential in CTL.

Ventilation hole provided in the drum

frame releases heat from bulbs.

-380

-410

-440

GB PAT

MC grid bias voltage

In the SF-2214/2118, the absolute value of the output of the den-

sity sensor is not directly used for control calculation, but the ratio

of the sensor output value (BA) on the drum surface and the

sensor output (PA) of the toner patch image is used for control

calculation.

Cleaning mechanism:

Main corona:

The cleaning blade removes the toner

remaining on the drum surface. The blade

always rests on the drum surface.

The saw teeth corona charge method is

used. Use of the screen grid maintains the

even charge potential over the photocon-

ductor surface.

* The grid bias value is obtained so that the ratio of the drum

surface level and the sensor level when forming patch level and

the sensor level when forming patch images is 200:40.

Enforced separation

mechanism:

Using two pieces of separation pawl, the

copy paper stuck over the drum surface is

forced to separate from the drum surface.

Though, therefore the light quantity of the reflection type sensor is

varied by dirt or deterioration, the ratio (PA/PB) will not be affected

by change in light quantity to provide stable control.

5 – 15

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Waste toner transport

mechanism:

The waste toner is passed through waste

toner transport screw 1 and waste toner

pipe 2 to waste toner bottle 3.

(5) TRANSPORT/FUSING SECTION

1) General

The SF-2116/2118 allows transport of paper of max. A3 (11" x 17")

and min. A5 (8 1/2" x 5 1/2").

Waste toner bottle 3 is rotated by the

main drive gear via gear 4 to transport

toner evenly.

When the waste toner bottle is full of

waste toner, the rotation torque of gear 4

is increased to escape gear 5 in the

arrow direction A, and switch 6 is turned

on at the same time to light the waste

toner replacement lamp.

After images are transferred on the paper, the paper is separated

from the drum by the separation pawl and transported to the fuser

section by rotations of the resist roller and the transport belt.

The drum separation pawl is provided under the process unit. It is

made by turning on (separating) the solenoid inside the main drive

unit.

2) Basic composition and functions

1 Transport belts (2pcs)

The transport belts are provided with notches to hold paper rear

ends.

Paper

Feeding direction

Transport belt

(6) Fusing paper exit section

1 Upper heat roller

The upper heat roller is teflon-coated.

2 Lower heat roller

A silicone rubber roller is used.

3 Separation pawl

The upper heat roller is equipped with four pawls which are teflon

coated to reduce friction.

the lower heat roller is equipped with two pawls.

4 Upper/lower separation function

The upper and lower heat roller sections are separated by rotating

operations with the transport roller as a fulcrum, providing better

serviceability.

5 – 16

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5 Drive system division

(7) High voltage section

1) General

The fuser unit is rotated by the main drive unit. In case of manual

rotation of the fuser unit to remove paper jam, however, excessive

loads may be applied to the gears. To prevent against this, the

pressure of the upper/lower heat rollers is reduced when the

machine clamshells are opened. In addition, the fusing gear is so

constructed that the drive is not transferred to the drive system.

There are three kinds of coronas; the main corona, the transfer

corona, and the separation corona. The main corona employs the

scorotron system, where the drum surface is evenly charged with

negative charges controlled by the screen grid between the corona

and the drum. The transfer corona is used to transfer toner images on

the drum to the copy paper. A high, negative voltage is applied to the

rear side of the paper. The separation corona applies AC corona to

the copy paper to eliminate potential difference with the drum to allow

separation of the paper.

Proccess

Main motor

unit

Main drive unit

Stirring roller

The output voltage of the main charger and the transfer charger is

supplied by transformer 1. The feedback current from the transfer

charger is controlled to be constant and outputted to the main

charger.

DV drive unit

Fuser unit

MG roller

Cleaner

unit

Transport

unit

PS roller

2) Basic composition

Paper exit

roller

Multi manual

insertion paper

feed unit

1 Main (charging) corona – High voltage transformer (MHVG)

(Option)

Grid voltage Developing bias voltage

Transport

roller (upper)

Standard mode

Photo mode

TSM mode

–750V

–500V

–650V

–200V

Transport

roller (lower)

Paper feed

rive unit

Paper feed

unit

2 Main transfer corona – High voltage transformer (THVG)

–41µA (Electrode sheet front-rear balance difference: max. 7.0µA)

3 Separation corona – High voltage transformer (SHVG)

AC4KV ±0.1KV

Paper feed

unit

Thermo control

Heat roller surface

temperature detection

(8) ADU unit (SF-1120 only)

1) Basic operation

Thermistor

The ADU unit is stored above the paper cassette in the lower side of

the copier. In the duplex copy mode, the copy paper is passed from

the fusing unit through the reverse roller to the ADU, where it is

aligned by the alignment plate. Then it is pressed onto the take-up

roller by the paper holding plate, and only one sheet is transported by

the paper feed and reverse roller. It is transported from through the

transport roller to the copier, where duplex copy is made.

Heat roller

The heat roller is heated by the

heater lamp.

(When the heat roller surface

temperature is 190 C˚ or lower,

the heater lamp is actuated)

CPU

Heater lamp

(Heater trouble)

Self diag display

Thermostat

Contact open (*)

Abnormal high

temperature

• Abnormally high temperature (H3) 240°C or upper

• Abnormally low temperature (H4)

• Thermistor disconnection (H2)

* When the thermostat contact is open, it is required to press the

reset button in the upper side of the thermostat. (The contact is not

reset automatically.)

Transport upper unit

Reverse roller

Cur correction unit

DPHPS2

(Rear edge plate home

position sensor)

Rear edge plate

Paper feed roller

Take-up roller

5 – 17

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DPTD

(DDM rotary encoder sensor)

-1

-2

DPHPS1

(Alignment plate home position sensor)

2) Details of operation

1 The alignment plate and the rear edge plate detect the home

positions, and moves to the paper size position. (ADU motor 1, 2,

ON)

2 Paper exit, reverse unit operation (ADU gate solenoid ON)

3 Rollers in the ADU rotate in the direction of paper entry. (ADU

drive motor ON)

4 ADU paper entry detection (ADU paper entry/exit sensors 1, 2

ON)

5 ADU paper presence detection (ADU paper sensors 1, 2 ON)

(5-1 is used only in the AB series.)

6 Rollers in the ADU rotate in the direction of paper exit. (ADU drive

motor ON)

7 Holding plate operation (Take-up clutch ON)

8 Take-up roller. paper feed roller rotation (Paper feed clutch ON)

9 ADU paper feed detection (ADU paper entry, exit sensor ON)

F ADU paper transport detection (ADU transport sensor ON)

ADU sensor list

Signal name

DPHPS1

Name

Alignment plate home position sensor

Rear edge plate home position sensor

Paper sensor 1

Type

Operation, function

Transmission sensor

LOW at home position

HIGH with paper present

Motor rotation detection

DPHPS2

DPED1

DPPD1

DPED2

DPOD

Paper entry sensor

Paper sensor 2

Paper exit sensor

DPTD

DDM rotary encoder sensor

5 – 18

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(Note for assembly)

1) There is the 8-pin connector on the back of the rear frame side.

When assembling it, carefully insert.

[6] DISASSEMBLY AND ASSEMBLY

The descriptions are divided into the following sections.

2) The belt must be on the paper feed unit gear and the resist roller

gear.

1. Paper feed section

2. Transport section and power section

3. Fusing section

1-2. Paper feed roller ass’y removal

4. Optical system

5. SPF section

6. Drum section

7. Developing section

8. Operation panel section and intermediate cabinet

9. Major parts on the frame side

10. Manual multi paper feed unit (SF-MF15, option)

11. Paper feed unit (SF-CM15, SF-CM16, option)

1) Remove the rear frame side electromagnetic clutch connector.

2) Remove the front frame side stopper and the bearing.

3) Remove the roller release arm spring from the paper feed frame.

1. Paper feed section

1-1. Paper feed unit

1 Open the front cover and lift up the upper clamshell. Remove two

fixing screws of the manual paper feed section, and remove the

manual paper feed section.

4) Remove the rear frame bearing, and one side of the paper feed

roller ass’y will be disengaged. To remove the ass’y completely,

remove the E-ring.

(Note for assembly 1)

With roller release arm spring A hooked on the spring notch, attach

the paper feed roller ass’y to the paper feed unit, and hook the spring

on the paper feed frame.

2 Remove the four fixing screws (M4 x 10 x 1pcs, step screw x 1 pc)

of the paper feed unit, and lift the rear frame side of the paper

feed unit and remove it. (Since there is the 8-pin connector on the

back of the rear frame side, it requires some force to remove.

Carefully pull it out straight.)

6 – 1

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(Note for assembly 2)

1-4. Separation roller

When attaching the paper feed section roller ass’y, adjust so that the

paper feed roller clutch and the PS front roller ass’y clutch projection

face toward the paper feed side.

1 Remove the paper feed unit and remove the separation roller.

1-5. Paper feed roller, take-up roller

1-3. PS front roller ass’y

1 Remove the paper feed roller, and remove the take-up roller.

1 Remove the paper feed unit. (For the details, refer to the 1-1.)

2 Disengage the hook section of the front frame side bearing,

remove the connector on the rear frame side, and remove the PS

front roller ass’y from the paper feed frame.

2 Remove the roller holder, the stop ring, the bearing, and the paper

feed roller.

6 – 2

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(Note for assembly)

Attach the paper feed roller so that the one-way clutch is on the rear

frame side. (Be careful of the direction.)

Attach the roller holder as shown below.

One-way clutch side

1-6. Lower paper feed unit

1-8. Transport roller

Perform similarly for the optional two-stage paper feed

unit.

Remove two screws and remove the lower paper feed unit.

Perform similarly for the optional paper feed unit.

1 Remove the lower paper feed unit. (Refer to 1-6.)

2 Remove the stopper, slide the bearing, and remove the transport

roller.

1-7. Lower separation roller

Perform similarly for the optional two-stage paper feed

unit.

1-9. Lower paper feed roller/take-up roller

For removal of these rolls, refer to 1-2 (Paper feed roller ass’y) and

1-5 (Paper feed roller, take-up roller).)

1 Remove the lower paper feed unit. Refer to 1-6.)

2 Remove the paper feed frame. (4 screws, 2 connector)

3 Remove the separation roller.

2. Transport unit

2-1. Resist roller, transfer roller

1 Open the front cover.

2 Release two lock pawls of the TC case, and lift the front side of

the TC case to remove.

6 – 3

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TC/SC case

4) When attaching the resist roller ass’y to the copier, attach over the

upper side of the PS roller lower mylar, then rotate the roller to set

the mylar to the normal position. (If the mylar is deformed, it may

cause paper jam. Replace it if deformed.)

3 Remove the hook of the front frame side bearing, and lift it up to

remove it toward the upper frame side. Remove the rear frame

side connector, and slide and remove the resist roller ass’y toward

the rear frame side.

PS mylar

2-2. Transport belt

1 Remove the fusing unit.

2 Remove the TC case.

3 Disengage the transport belt drive shaft holder on the TC case

side, then disengage the drive shaft on the paper exit side and

remove the belt.

4 Remove the clutch and the gears as shown below.

(Note for assembly)

1) Attach so that the resist roller clutch projection is on the paper exit

side as shown in the figure below.

(Note for assembly)

2) Arrange the cable and the power grounding wire from the resist

roller clutch as shown in the figure below.

1 There is a mark ( î ) on the transport belt. Set so that the tip of

the mark faces toward the paper exit direction.

3) Hook the hook section of the TC case as shown below.

2 Be careful of the installing direction of the transport belt drive

shaft.

6 – 4

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(Note for assembly)

3. Fusing section

When removing the unit from the copier, ba careful not to scratch the

photoconductor drum and the lower heat roller. Be careful not to

break the actuator of the paper exit sensor (POD).

3-1. Fusing unit removal

1 Open the front cover.

3-2. Heater lamp replacement

2 Push the open/close lever down to the right side, and slowly open

the upper unit.

1 Remove the fusing cover fixing screw (1 pc.), and slide the cover

3 Remove the fixing screw of the fusing connector cover and

to the front side to remove.

remove the cover.

2 While pressing the Fasten terminal projection connected to the

thermostat, remove the lead wire from the connection section.

3 Remove the fixing screw of the lamp holder on the upper side of

the rear frame, and remove the holder.

4 Remove the fusing unit hanging wire from the copier frame and

remove two connectors from the unit.

4 Pull out the heater lamp from the front frame side.

For assembly, reverse the disassembly procedures.

3-3. Upper heat roller ass’y removal

1 Remove two fixing screws of bearings of the front and the rear

frames.

2 Push the paper guide down to the paper exit side and separate

the separation pawl from the roller and fix it.

5 Remove the stop ring and remove the unit.

3 Rotate the bearing fixing screws about 45 degrees downward and

remove the ass’y.

For assembly, reverse the disassembly procedures.

6 – 5

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(Note for assembly)

3-4. Upper separation pawl replacement

Assemble so that the lower separation pawl is on the upper side of

the lower heat roller. (At that time, return the separation pawl which

was set upright in procedure (2).)

1 Remove the fusing unit, and remove the cover.

2 Put the fusing unit so that the paper guide is on the lower side of

the fusing unit (the separation pawl is on the upper side).

3 Remove the tension spring, hold the separation pawl tip and

remove it from the supporting section, and remove it from the unit

by tilting.

For assembly, reverse the disassembly procedures.

3-6. Lower separation pawl replacement

1 Remove the fusing unit.

2 Remove the lower heat roller.

3-5. Lower heat roller replacement

1 Remove the fusing unit.

2 With the lower separation pawl upright, slide it to the rear frame

side and keep the lower separation pawl upright.

3 Remove the lower heat roller together with the bearing.

For assembly, reverse the disassembly procedures.

3 Remove three screws and remove the lower separation pawl unit.

5 Remove the tension spring, hold the separation pawl tip to remove

it from the supporting section, and remove it by tilting.

6 – 6

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3-7. Thermistor/thermostat removal

1 Remove the fusing unit.

(B)

2 Remove the fusing cover, and remove the thermistor/thermostat.

Optical adjustment plate

* Note for assembly

• Check that the thermistor center is in contact with the heat roller.

• Clean the thermistor surface with alcohol to remove foreign

materials.

4. Optical system

The optical system is an integrated finish product delivered by the

maker as stated in the previous section. The replacement procedures

for the major parts in the optical system are described here.

Install so that the projected portion of the copy lamp is near the rear

side as shown above.

1) Copy lamp replacement

2) Mirror base wire replacement and adjustment

A. Copy lamp unit removal

1 Remove the OR guide, and remove the table glass. (2 screws)

2 Slide the copy lamp unit to the notch at the rear of the upper

cabinet. Push the copy lamp electrode (section A) in the arrow

direction B, and remove the lamp.

1 Remove OR guides R/L, and remove the table glass.

Do not move the optical adjustment plate. (If it is moved, the light

balance will go wrong.)

Note: Be careful of the installing direction of the copy lamp.

6 – 7

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2 Remove the operation panel, the upper cabinet R, and the right

B. Mirror base wire removal

cabinet.

1 Remove the upper cabinet L, and the left cabinet.

2 Remove the mirror wire spring from the groove on the left side of

the optical base plate.

3 Remove the dark box cover upper.

3 Remove the mirror base wire from the winding pulley.

(Remove he wire fixing screw.)

4 Manually move mirror base B. (Within the range where the wire

fixing plate fixing screw can be removed.)

5 Remove the wire fixing plate in the front/rear frame side of the

copy lamp unit, and remove the wire from the side plates F/R.

6 Remove the harness from the copy lamp unit.

7 Rotate the copy lamp unit counterclockwise to remove.

C. No. 2/3 mirror unit (mirror base B) removal

1 Move the mirror base B to the center between the positioning and

the optical base plate left surface.

2 Lift the front side of mirror base B and separate it from the rail.

(The front side only)

6 – 8

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3 Rotate the mirror base B counterclockwise to remove.

1 Hook the metal fixture of the mirror base wire on the optical base

plate hook.

4 Disconnect the connector from the copy lamp unit on the rear

frame side and from the No. 2/3 mirror unit.

2 Pass the mirror base wire along the groove outside the double

pulley.

5 Rotate the No. 2/3 mirror unit counterclockwise and remove.

<Note> At the time, put the No. 2/3 mirror unit on the mirror base

positioning plate.

Hold it so that the winding pulley groove is on the upper

side, and wind the wire.

4 Pass it under the moving pulley supporting plate and wind it

around the fixed pulley.

5 Pass it along the groove inside the double pulley.

6 Pass in through the L pulley.

7 Hook the mirror base wire spring on the groove at the left of the

optical base plate.

(Same in the front and the rear side.)

D. No. 2/3 mirror unit (mirror base B) assembly

Reverse the above procedures.

E. Mirror base wire stretching

Check that the wire groove in the front winding pulley is aligned with

the wire groove in the rear winding pulley.

(If there is too much a shift in the circumference, loosen two pulley

fixing screws, and visually fit the positions and fix.

F. Mirror base wire fixing

1 Manually turn the mirror base drive pulley to bring the mirror base

B into contact with the mirror base positioning plate.

2 Shift the 9th winding tip of the mirror base wire from the pulley

screw hole section.

Mirror base B

6 – 9

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2 If the parallelism of the mirror base B is improper as shown in the

figure below (one side of the mirror base B is in contact with the

positioning plate and the other side is not in contact), perform the

following procedure.

3 Loosen the mirror base drive pulley fixing screw on the side where

the mirror base B is not in contact with the positioning plate.

4 Manually rotate the mirror base drive pulley on the side where the

mirror base B is not in contact with the positioning plate to bring

the mirror base B into contact with the positioning plate.

3 Fix the mirror base wire to the pulley with the mirror base wire

fixing screw.

4 Return the 9th winding tip of the mirror base wire to the original

position. (Perform the same procedure for the front frame side and

the rear frame side.)

(Note) After replacing the mirror base drive wire, perform the vertical

skew adjustment, the focus adjustment, and the horizontal

skew adjustment.

3) No. 2/3 mirror unit (mirror base B) installation

(Mirror base B positioning)

This is to adjust the parallelism of mirror base B and the drum surface

and the original surface.

This adjustment must be performed in the following cases:

• When the mirror base drive wire is replaced.

• When mirror base A or mirror base B is replaced.

1 Manually turn the mirror base drive pulley to bring the mirror base

B in contact with the mirror base positioning plate. If the front side

and the rear side of the mirror base B make contact with the

mirror base positioning plate simultaneously, the parallelism of the

mirror base B is proper, and there is no further adjustment.

5 Tighten the mirror base drive pulley fixing screw.

6 Manually rotate the mirror base drive pulley to separate the mirror

base B from the mirror base positioning plate once, then bring it

into contact with the positioning plate.

Check that the front side and the rear side of the mirror base B

make contact with the positioning plate simultaneously.

7 If the condition of 6 is not satisfied, repeat procedures 3

through 6 until the condition is satisfied.

Mirror base positioning plate

No.2/3 mirror unit

6 – 10

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2 Remove the dark box cover upper.

4) Copy lamp unit installation (Mirror base A

positioning)

This adjustment must be performed in the following cases:

• When the mirror base drive wire is replaced.

• When the mirror base A or B is replaced.

• When any part in the dark box is replaced.

When installing the mirror base, reverse the removal procedure of

(2)-A.

1 Put the mirror base A in the copier. Pass the mirror base drive

wires in the front frame side and the rear frame side through the

clearance between the mirror base A and the mirror base wire

fixing plate. Do not tighten the mirror base A wire fixing screw at

that time.

2 Bring the mirror base B into contact with the positioning plate, put

a flat jig (such as a scale edge) onto the right surface of the optical

base plate (paper feed side), press the projection of the copy lamp

unit onto the jig and fix it with two screws.

3 Remove the right cabinet.

(Note) When tightening the copy lamp unit fixing screws, be sure to

press the projection onto the scale.

Horizontal scales

Projections

5) No. 4/5 mirror unit (mirror base C) replacement

A. No. 4/5 mirror removal

4 Remember the positions of the lens drive shaft attachment plate

1 Remove the OR guide L and R, the remove the table glass.

(in the directions of A and B) (Inscribe a line).

Inscribed

line

* (IMPORTANT) This is to prevent against defective focusing.

(Measurable with a scale.)

6 – 11

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5 Remove the drive springs 4 and 5.

8 Remove the drive shafts 4 and 5.

* When removing the No. 4/5 mirror unit, remember the positions

(scales) of the arrow marks of the drive holder 4 and 5.

Zooming rack

6 Remove the zooming rack of the roll holder unit.

No.4/5

adjustment

screw

No.4/5 drive latch

stop screw

No.4/5 drive holder

B. No. 4/5 mirror unit assembly

Reverse the above procedures.

<Note>

When attaching the lens drive shaft attachment plate, attach it to

position 5 in the above description.

Fit the arrow positions of the drive holder 4 and 5 as the previous

state.

7 Remove the lens drive shaft attachment plate.

Zooming rack

No.4/5

adjustment

screw

No.4/5 drive latch

stop screw

No.4/5 drive holder

* When the arrow positions cannot be fit:

1 Loosen the zooming rack screw and slide it to adjust.

2 Loosen the two screws which are fixing the driver holder 4 and 5

and the drive latch 4 and 5. Adjust with the drive holder 4 and 5.

After completion of adjustment, tighten the two screws.

6 – 12

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4 Remove drive spring 4 and 5.

6) Lens wire replacement

A. Lens wire removal

1 Remove the OR guide L and R, and remove the table glass.

5 Remove the E-ring which is fixing the roll holder drive shaft, and

remove the roll holder unit.

2 Remove the dark box cover upper.

6 Remove the zooming cam and the zooming cam drive gear (which

are fixed with screws).

3 Remove the lens motor.

6 – 13

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7 Remove the drive wire spring and the wire hook from the lens

2. Procedures

carriage boss.

1 Manually move the lens carriage unit to fit the lens carriage hole

with the optical unit frame hole (which is not the home position

hole but the reduction side hole). Insert a pin into the holes, fix the

lens unit, and stretch the wire.

L drive pulley

Lens unit

Lens carriage unit

Wire hook

Wire SP

2 Under the above state, fit the zooming cam drive gear hole with

the No. 4/5 drive unit base hole A (by inserting a pin, etc.), and

insert the zooming can drive gear into the shaft.

8 Remove the L pulley and the L drive pulley from the lens wire.

B. Lens wire stretching

Zooming cam drive gear

Hole

1. This procedure is performed in the following case.

(1) When the lens unit is removed.

(2) When No. 4/5 mirror drive unit is disassembled.

Hole A

(3) When the copy is out of focus because relative position of the lens

unit and No. 4/5 mirror unit is shifted by moving the lens unit itself

back and forth without turning the L drive pulley.

Shaft

* In order to move the lens unit of this machine back and forth in

servicing, be sure to turn the L drive pulley. (If the lens unit itself is

moved, the wire may slip at the L drive pulley and the relative

position of the lens unit and No. 4/5 mirror unit is shifted, resulting

in improper focusing.)

L drive pulley

Hole B

3 Remove the pin which fixes the lens unit and the zooming cam.

Lens unit

6 – 14

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4 Manually turn the zooming can drive gear to fit the zooming cam

6 Loosen the zooming cam screw, and fit the mark of zooming cam

drive gear hole and No. 4/5 mirror drive unit base hole B.

drive gear with the mark of No. 4/5 drive shaft.

Zooming cam

drive gear

Hole

No. 4/5 mirror

drive unit base

Zooming

cam gear

Hole B

Do not move the zooming cam gear at this time.

∗

Zooming cam drive gear

5 Install No. 4/5 mirror drive shaft unit and the rack.

* When installing the rack, be sure to fit No. 4/5 mirror unit projection

with No. 4/5 mirror drive shaft unit hole.

Mark

* After this procedure, be sure to perform the optical system adjust-

ments (focus adjustment, etc.). (Refer to [7] ADJUSTMENTS.)

7) Lens unit replacement

A. Lens removal

1 Remove the lens wire. (Refer to the procedure of "A. Lens wire

removal" in 16) Lens wire replacement.)

Hook

2 Hold the lens drive shaft with radio nippers and remove it.

No. 4/5 mirror

drive shaft unit

Notch in the optical

base plate.

3 Remove the lens drive shaft from the notch in the optical base

plate. The lens unit is removed at that moment.

B. Lens unit installation

Reverse the disassembly procedures. (Refer to (6)-B. Lens wire

stretching.)

6 – 15

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4 Remove the screw and remove the charging plate (saw teeth)

5. High voltage section

ass’y.

Clean the MC case, and the TC/SC case every 50K copies. Clean the

screen grid, the charging plate (saw teeth), and the TC/SC wire every

50K copies, and replace them every 100K copies.

5-1. Main charger (MC) unit

1 Open the front cover.

2 Hold the MC unit lock section, and pull out the MC unit.

(Cleaning/replacement and note)

1 When attaching the screen grid, be careful not to deform and dirt

the screen grid. Check that the screen grid is securely in position.

3 Loosen screws Aand B, and remove screen grid E.

(When attaching the screen grid, tighten screw B until the mark-

ing position F of grid holder C in the above figure is aligned with

marking position Fof MC holder D, and tighten screw A.)

2 Be careful not to deform the saw teeth edge of the saw teeth

ass’y.

3 Do not touch the inside (saw teeth ass’y) of the MC case, the

screen grid, and the saw teeth.

4 To clean the MC saw teeth, push styrene foam onto the saw teeth

at right angles and remove dirt.

6 – 16

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5 When installing the unit to the body, check that the grounding

spring is in contact with the TC/SC case (metal section) on the

rear and the front sides. (Visually check, and push the center of

the TC/SC unit to check that it can be moved up and down.)

5-2. Transfer/separation charger (TC/SC) unit

1 Open the font cover, open the body up.

2 Push TC/SC unit pawl sections A (2 positions) and lift the front

side and pull it out.

TCUN

Front

Rear

Base plate

Rear pawl

Front pawl

6 Transfer mylar lower

TC mylar lower

attachment reference

1.5 0.5

0~0.5

(Cleaning/replacement and precautions)

1 Set the charger SP length to 17 ±1.0mm.

1.0 0.5

6. Process section

6-1. Process unit

1 Open the front cover, remove the developing unit, and open the

clamshell.

2 Remove process cover A. (Loosen the screw to remove.)

3 Loosen two blue screws which are fixing the unit. Remove one

screw, disconnect one connector, and remove unit B. (Do not

hold the toner transport pipe.)

17 1.0

2 The charger wire must be free from distortion and deformation,

and must be in the wire positioning groove of each holder.

3 The charger case must be free from oil, dirt or adhesion of foreign

material.

3~5mm

4 Clean the wire with alcohol.

6 – 17

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4 While pushing waste toner bottle in the direction of A and lift it

6-2. Waste toner bottle replacement (required when

waste toner full detection/maintenance)

and remove.

1 Take out the process unit as shown above,

<Note> If the unit is removed by holding the toner transport pipe,

toner is spilled. Avoid this.

2 Remove the bottle cover. (2 screws)

(Note for assembly/maintenance)

1 As shown in the figure below, attach so that two projections of

gear 19T g are on the rear frame side (on the screws supporting

plate f side).

3 Rotate waste toner bearing 1 A 90 degrees counterclockwise.

Hole the base of toner transport pipe B and pull it out. (At this

time, toner may be spilled. Put a sheet under the pipe.

2 Replace the waste toner bottle when waste toner full is detected

or at 50K maintenance. At this time, clean and remove the waste

toner from waste toner pipe A.

6 – 18

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6-3. Drum (Replace every 50K copies)

6-5. Discharge lamp unit (Clean every 50K copies.)

1 Remove the process unit from the copier. (Refer to 6-1.)

1 Remove three blue screws which are fixing the process unit

holder, slide the holder and remove it.

2 Loosen two blue screws which are fixing the drum, rotate the plate

slightly to the right and pull it out.

2 Remove the discharge lamp unit. (one screw, one connector)

3 Remove the drum.

<Note> Be careful not to scratch the drum.

6-4. Blank lamp unit (Clean every 50K copies.)

1 Remove three blue screws which are fixing the process unit

holder, slide the holder and remove it.

2 Tighten the blank lamp unit position adjustment screw completely,

and remove the unit rear side, then loosen the screw.

3 Remove two connectors of the blank lamp PWB, and remove the

blank lamp unit.

<Note> When the unit is installed or replaced, adjust according to

"Blank lamp position adjustment" in [7] ADJUSTMENTS.

6 – 19

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6-6. Cleaner blade (Replace every 50K copies.)

1 Remove the holder from the process unit. (3 blue screws)

2 Remove the cleaning blade. (3 blue screws)

7. Developing section

A. DV side seals F/R replacement (Replace every 120K

copies.)

1 Remove two screws which are connecting the hopper section and

the developing unit, and separate them each other.

Fixing screw

Toner hopper

Developing unit

6-7. Drum separation pawl (Replace every 50K

copies.)

Slide and remove the blue pin to remove the separation pawl.

Replace the star-shape washer with a new one if it is worn down.

2 Replace the developing unit side seals F/R as shown below.

6-8. Process control PWB (Clean the sensor

section every 50K copies.)

1 Remove the holder from the process unit (3 blue screws), and

remove the connector of the process control PWB.

2 Remove the holder of the process control PWB (2 screws), and

remove the PWB (2 screws).

(Side seal R attachment reference)

6-9. Drum mark sensor PWB (Clean the sensor

section every 50K copies.)

Remove the holder from the process unit (3 blue screws), and

remove the marking sensor PWB. (1 screw).

6-10. Toner reception seal (Replace every 50K

copies.)

Remove the drum and remove two screws to remove the seal.

(Side seal F attachment reference)

Note: Since the developing side seals are in the vicinity of the drum,

be careful of peeling off and defective attachment.

6 – 20

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B. DB blade replacement (Replace every 120K copies.)

1 Remove the old DV blade from the DV cover. (Remove the duplex

Plate MFE

tape.)

2 Attach the new DV blade with the pasteboard as shown below.

(Attach the DV blade to the reference of A and the inscribed line

(

0.2). Do not allow extrusion from the edge. Do not allow

covering the inscribed line. The allowable reference shift is within

0.5mm from the inscribed line. Attach the sheet without being

wavy.

φ6.5

Magnet fixing shaft

MAG roller

Do not allow contact between φ 6.5 hole in the plate MFE and the

magnet fixing shaft.

DV cover

Remove oil and dirt from the attachment section.

@ Note: When attaching the MG roller, put the milled surface up.

D. Note for toner hopper drive gear (31T) and stirring

shaft attachment

• Be careful of the stirring shafts A and B attachment positions.

Stirring shaft B

DV blade

3 Remove the base pasteboard from the DV blade.

Note: If the pasteboard is not removed, the drum is scratched.

C. V ring attachment

Be careful of the direction of the V ring when attaching it to the MG

roller and the MX roller.

Stirring shaft B

Attach so that the angle between stirring shaft A and B is 90

degrees.

Plate MFE

V ring

• When attaching the toner hopper drive gear (31T), be careful of

the E-ring stop position as shown below. (If the E ring is on the

milled surface, it is apt to disengage.)

+0.5

-0

3.0

V ring

(MG roller)

Section A

31T gear

V ring

Section A

V ring

Section A

(MX roller)

1 As shown above, be careful of the direction of the V ring.

2 Do not allow clearance at section (A) between the V ring and each

roller.

3 Attach the MG roller and the right V ring as shown in the figure.

(3.0⁺⁵

)

−0

@ Note: When replacing the MG roller, attach the plate MFE.

6 – 21

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G. Developing unit color identification

Color identification is made for different resistances of the developing

unit.

9. Frame major parts

9-1. Cooling fan motor replacement

A. Cooling fan motor removal

Vref (About 4.5)

1 Remove the original cover, the original guide, the upper cabinet

left, and the upper cabinet right.

6.2KF

DVC

Developing unit

Resistance

Color

Identification signal voltage (DVC) [V]

(KΩ)

Black

Red

6.2

12.0

2.25

2.97

Blue

2 Remove the upper cabinet and the rear cabinet.

8.Operation panel/intermediate cabinet

1 Open the front cabinet.

2 Remove two screws A, two screws B, and two harnesses con-

nected to the operation panel unit.

2 Remove the operation panel unit.

3 Remove the process cover unit, remove six screws C and two

connectors, and remove the intermediate cabinet.

3 Remove the cooling fan from the CFM duct. (2 screws, 1 connec-

tor)

6 – 22

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B. Cooling fan motor

9-2. Power unit

1 Remove the rear upper and lower cabinets.

Label

2 Remove two connectors, hold the PWB fixing bush with radio

nippers and slide it toward the paper exit side to remove.

Reverse the removal procedures.

<Note> When attaching the cooling fan motor, put the harness sec-

tion B and the CFm duct groove section A in the same

direction, and pass the harness in the groove.

Check that the fan center label is on the back when viewed

from the rear of the machine.

9-3. Tray size detecting PWB

1 Remove the rear upper/lower cabinets.

2 Remove the power unit.

Check that air blows in the arrow direction (toward the

machine).

3 Remove one fixing screw, one connector, and remove the tray

size detection PWB.

6 – 23

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9-4. Main PWB unit

1 Remove the rear cabinet upper.

2 Disconnect all the connectors (6 connectors) connected to the

main PWB.

3 Remove the main PWB plate (one screw).

4 Remove the main PWB from the plate. (2 screws)

(SF-2120)

2 Remove the ventilation fan motor (2 screws). (SF-2020)

9-5. AC power PWB

1 Remove the main PWB unit. (Refer to 9-3.)

2 Remove the rear cabinet lower.

3 Remove all the connectors (11 connectors) of the AC power PWB

and remove one grounding wire connected between the AC power

PWB and the copier chassis.

3 Remove the process unit. Insert a screwdriver from the process

unit position into the copier to push out the oZone filter. (SF-2020)

4 Remove two screws which are fixing the AC power PWB, and

remove the PWB.

9-6. Ozone filter (Check every 50K copies, and

clean every 100K copies.)

1 Remove the upper cabinet left, and the left cabinet. (5 screws)

(SF-2020)

6 – 24

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10-2. Take-up roller/paper feed roller

10. Multi paper feed unit (SF-MF15: option)

1 Remove the manual feed arm spring, the bearing stopper, and the

E-ring. (At this time, slide the bearing from the guide section in

advance.)

10-1. Separation roller

1 Remove three screws and remove the paper feed/take-up roller

2 Lift the manual feed stopper, and remove the manual feed shaft

ass’y.

3 Remove the take-up roller.

2 Remove the separation roller.

4 Remove three E-rings, and remove the manual feed shaft. then

the paper feed roller will come off.

@ When attaching the roller, engage the D-cut section with the

groove.

(Note for assembly)

The paper feed roller is provided with the one-way clutch, which must

be installed in the proper direction. Attach so that the side where

there is the one-way clutch (specified with "LOCK") is on the front

frame side.

6 – 25

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6 Remove the reverse roller.

11. ADU

1 Remove the extension stopper, and remove the ADU from the

copier.

(Perform the same procedures for the take-up roller.)

2 Remove the four fixing screws (M4 × 8) of the ADU cover, and

remove the ADU cover.

1 Remove the extension stopper, and remove the ADU unit from the

copier.

3 Remove the six fixing screws (M4 × 10 = 4 pcs., M4 xc 8 = 1 pc.)

of the transport frame lower unit, and remove the unit from the

ADU unit.

2 Put the ADU unit up side down. (The lower side facing up.)

3 Remove two plastic E-rings.

At that time, slightly lift the transport frame lower unit to disconnect

the paper entry/exit sensor connector.

4 Slide the bearing in the arrow direction (inward).

5 Remove the paper feed roller shaft from the ADU unit.

6 Remove the plastic E-ring, and pull out the paper feed roller in the

arrow direction.

4 Remove the E-ring of the reverse roller, and remove the pressure

spring.

5 Remove the reverse shaft fulcrum lever ass’y and slide the

reverse roller shaft in the arrow direction to remove.

6 – 26

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7 Slide the reverse roller in the direction of Q.

1 Remove three fixing screws (M4 × 10) of the left cabinet, and

remove the left cabinet. Remove the plastic E-ring which is fixing

the paper exit cabinet unit, and slide the paper exit cabinet unit in

the arrow direction and remove it from the copier.

2 Remove two fixing screws (M4, flat) of the paper exit cabinet unit

and one fixing screw (M3 × 6) of the paper exit plate spring.

12. Paper feed unit (SF-CM15, SF-CM16,

option)

This unit had two stages of paper feed section of the SF-2020 (one

stage for the SF-CM16). For disassembly and assembly, refer to

[5]-(1) Paper feed section.

3 Remove two E-rings (7E) at the both ends of the reverse roller.

4 Remove the gear and the parallel pin (???3 × 10) from the reverse

roller.

5 Remove two E-rings (E7) inside of the gear.

6 Remove two bearings at the both ends of the reverse roller.

6 – 27

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[7] ADJUSTMENTS

1. Developing section

1-1. Developing doctor clearance adjustment

Plate D

a. If the clearance between the developing doctor and the MAG

roller is improper, the following trouble may occur.

0.6

± 0.03mm

• Insufficient coy density

• Background copy

• Toner splash

MAG roller

(1) Remove the developing unit from the copier.

(2) Loosen four screws (A) which hold plate D fixed.

(3) Insert two clearance gauges of 0.6mm into the clearance be-

tween plate D and the MAG roller.

<Note> For insertion of the clearance gauges, refer to the

figure below.

(4) With two clearance gauges inserted, gently press plate D and

tighten four screws (A).

(5) Check that the clearances at two points 50 ∼ 80 mm from the

both ends of the developing doctor are within the specified

range (0.6 ± 0.03mm).

50mm

30mm

<Note 1> When inserting the clearance gauges, be careful

not to scratch the plate D and the MAG roller.

Clearance gauges

0.6mm

30mm

<Note 2> When adjusting or checking, be careful not to allow

foreign materials (oil, etc.) to attach to the MAG

roller sleeve.

50mm

(6) After adjustment, apply screw lock to the four screws (A).

* For color developing unit, use the specified value of 0.7±0.03mm

for adjustment.

1-2. Developing magnet roller main pole position

adjustment

a. If the MAG roller main pole position is improper, the following

troubles may occur.

• Insufficient copy density

• Toner splash

Marking

(1) Remove the developing unit from the copier.

(2) Tie a thread to a needle as shown below.

(3) Hold the thread and bring the needle close to the MAG roller.

(4) Mark the contact point of the thread on the MAG roller sleeve

surface.

7 – 1

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(5) Measure the distance from the marking position to the bottom

(A) of the developing unit and check that the distance is

17.6mm. If the distance is not as specified above, loosen the

MG adjustment plate fixing screw, move the adjustment plate

in the arrow directions and perform procedures (3) to (5) again.

17.6mm

MG adjustment plate

(6) After completion of adjustment, tighten the MG adjustment

plate fixing screw. When tightening, check that the bias ter-

minal is as shown below. After tightening the screw, apply

screw lock to it.

MG adjustment plate fixing screw

Bias terminal

MG adjustment plate

2. Optical system

2-1. Adjustment items

1. Lens reference position adjustment

2. No. 4/5 mirror reference position adjustment

3. Vertical copy magnification ratio adjustment

4. Resolution adjustment

5. Horizontal copy magnification ratio adjustment

6. Comparison table of lens values and simulation input values

7. Vertical skew adjustment

8. Horizontal skew adjustment

9. Center shift adjustment

10. Exposure balance adjustment

11. Copy lead edge adjustment

7 – 2

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2-2. Note for adjustments

1. Only the exposure balance adjustment, the blank lamp adjust-

ment, and the copy lead edge adjustment can be performed

individually.

For the other adjustments, follow the flowchart below.

1. Mechanical reference position adjustment (without copying)

A. No. 2/3 mirror unit parallelism adjustment

Vertical skew copy adjustment --- Manual adjustment

B. Check the following preset values according to the lens focus rank.

Lens reference position adjustment --- SIM 48-01

No. 4/5 mirror reference position adjustment --- Manual adjustment

2. Adjustment while

copying

Image distortion

Vertical skew copy adjustment

Horizontal skew copy adjustment

Center shift:

1. Image distortion,

center shift check

Lens center shift adjustment

YES

Resolution (focus) adjustment

Normal: Adjust with the No. 4/5

mirror adjustment screw.

2. Normal (x 1.00),

zooming (x 2.00)

resolution (focus)

check

Zooming: Adjust with the zooming

cam.

YES

Copy magnification ratio adjustment

3. Normal copy

magnification ratio

(vertical, horizontal)

check

Vertical copy magnification ratio

adjustment

Horizontal copy magnification

ratio adjustment

YES

Exposure balance adjustment

Blank lamp position adjustment

4. Exposure balance,

blank lamp position,

lead edge variation

check

Copy lead edge adjustment

(Including the void area

adjustment.)

YES

END

7 – 3

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2-3. Adjustment of each section

A. Lens reference position adjustment

In this model, the reference value according to each lens charac-

teristics must be entered. With this value, the lens home position is

determined.

Be sure to check that the magnification ratio cam is at the home

position as shown in the figure below.

(1) Execute simulation 48-01

• Perform the following key operation.

—

PSW

"A" is displayed on the third digit of the copy quantity dis-

play, and the previously set value or 50 is displayed on the

second and the first digits.

B. No. 4/5 mirror reference position adjustment

Numerals

(1) Remove the external fittings.

• Substitute the "O – L" value (variation in the distance be-

tween the original and the lens) on the lens value label at-

tached to position B shown in the figure below into the follow-

ing formula, and input the obtained value.

B (Lens value label)

(2) Loosen two screws (A) which are fixing the No. 4/5 mirror and

the No. 4/5 mirror drive holder to the No. 4/5 mirror holder.

No.4/5

drive rack

Screw A

50 – {(O – L value) × 5} = Correction reference value

No.4/5 drive holder

No.4/5 mirror holder

51 50 49

Lens

<Example> When the lens value is +1.2;

50 – (1.2 ×5) = 44 (Correction reference value = input

value)

7 – 4

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(3) Check to confirm the lens value specified on the lens value

label.

(4) Insert a screwdriver into hole (P) in the right rear side (paper

feed side) of the optical base plate, and adjust the adjustment

screw. The scale on the zoom base at section Q in the figure

below determines the position of the No. 4/5 mirror cor-

responding to the lens value.

No.4/5 sdjustment

screw

(shaded portion)

<Example> When the lens value is +1.2, loosen the adjustment

screw and adjust so that the arrow section of the No.

4/5 mirror drive holder points to the zoom base scale at

+1.2.

No. 4/5 mirror drive

holder arrow section

Zoom

base

One scale = 1mm

Turning the adjustment screw clockwise moves the No.

4/5 mirror drive holer arrow section in the (–) direction,

and turning it counterclockwise moves the arrow sec-

tion in the (+) direction.

(-) direction (+) direction

C. Vertical copy magnification ratio adjustment

Be sure to check that mirror bases A, B and C are in parallel and

that the focus is proper before executing this adjustment.

This adjustment must be performed in the following cases.

(1) Put a scale on the original table as shown in the figure below.

• When the lens home position sensor (LHPS) is replaced or its

installation position is changed.

• When the lens is replaced.

• When the mirror base is replaced or its installing position is

changed.

A4 (11" x 8½")

paper

• When the main PWB is replaced.

Scale

• When the EEPROM inside the main PWB is replaced.

(2) Make a normal copy (100%) on an A4 (11" ×8¹⁄₂") paper.

(3) Compare the scale image length and the scale length.

(When a 100mm scale is used as the original.)

Original scale

HARDDENCD

STAINLESS

JAPAN

1/2mm

100

110

120

130

140

150

Shizuoka

HARDDENCD

STAINLESS

JAPAN

Paper feed direction

1/2mm

110

120

130

150

Shizuoka

Reference

Comparison point

Copy

110

7 – 5

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(4) Calculate the copy magnification ratio.

Copy image size

Original size × 100%

(9) Adjust the copy magnification ratio according to the flowchart

shown in (6).

Copy magnification ratio =

(10) Make a copy at 50%.

(5) Check that the obtained copy magnification ratio is within the

specified range (100 ± 0.8%). If it is within the specified range,

go to procedure (7). If not, execute simulation 48-1.

(11) Check that the copy magnification ratio is within the specified

range (100 ±0.9%). If it is in the specified range, the vertical

copy magnification ratio is completed. If not, enter [%] in

simulation 48-1 as follows:

• Perform the following key operation.

—

PSW

—

PSW

"A" is displayed on the third digit of the copy quantity dis-

play, and the previously set value or 50 is displayed on the

second and the first digits. (Refer to "D-1. Lens reference

position adjustment.")

"C" is displayed on the third digit of the copy quantity dis-

play, and the previously set value or 50 is displayed on the

second and the first digits.

(6) Perform the magnification ratio adjustment according to the

flowchart below.

Numerals

The copy

size is shorter

than the original

YES

Enter a value greater

than the set value

(12) Adjust the copy magnification ratio according to the flowchart

shown in (6).

The copy

size is longer

than the original

Enter a value greater

than the set value

D. Resolution adjustment (Focus adjustment)

1 Normal copy ratio focus adjustment

(1) Check the "O.L value" on the lens value label of the lens unit,

and fit the reference position of No. 4/5 mirror. (Use the No.

4/5 mirror adjustment screw for positioning. Loosen screw A at

this time.)

<Note> After entering a value, press [PSW]

END

(7) Copy the scale at 200%.

(8) Check that the copy magnification ratio is within the specified

Lens value label

range (100 ±0.9%). If it is within the specified range, go to

procedure (9). If not, enter

lows:

key in simulation 48-1 as fol-

• Perform the following key operation.

—

PSW

"B" is displayed on the third digit of the copy quantity dis-

play, and the previously set value of 50 is displayed on the

second and the first digits.

Numerals

7 – 6

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No.4/5 mirror adjustment screw

4.5

5.0

2.8

3.2

3.6

4.0

(Copy)

Check points

5.6

6.3

7.1

8. 0

9.0

9.2

Perform the focus adjustment in the enlargement mode

(200%).

(1) Make a copy of the test chart on an A4 or 8 1/2″ × 11″ paper.

(2) Check the resolution at the four corners and the center of the

copy image. If the resolutions are within the specified range,

the adjustment is completed. If not, adjust by shifting the rela-

tive position of the zooming can to the drive cam.

1scale: 1mm

(-)

(+)

direction

(3) Turn off/on the power to initialize the lens and No. 4/5 mirror

unit. Check the focus in the enlargement mode again.

Resolution standards

(Unit: lines/mm)

Example: In the case of O.L value +1.0, this position is the

reference position.

Copy center

Corners

4.5

Normal (100%)

5.0

3.2

(2) Turn off/on the power to initialize the lens and No. 4/5 mirror

unit. Check the focus in the normal ratio.

Enlargement (200%)

Reduction (50%)

4.5

2.8

(3) If the focus is improper, perform the focus adjustment of the

normal ratio as follows:

4.5

2.8

3.2

3.6

(Copy)

(3)-1 Make a copy of the test chart on an A4 or 8 1/2″ × 11″ paper.

5.0

5.6

Check points

(3)-2 Check the resolution at the four corners and the center of the

copy image. If the resolutions are within the specified range,

the adjustment is completed. If not, adjust No. 4/5 mirror

adjustment screw. (Loosen screw A at that time.)

6.3

7.1

4.0

8.0

9.0

9.2

(3)-3 If the resolutions are not within the specified range, use the

No. 4/5 adjustment screw to adjust. (Loosen screw A at this

time.)

9.2

Zooming cam

Zooming

cam gear

Screw A

Do not move the zooming cam gear at this time.

∗

(4) Turn off/on the power to initialize the lens and No. 4/5 mirror

unit. Check the focus in the normal ratio again.

3 When the zooming can position is changed in 2, check the

focus in the normal mode again. If the resolutions are out of the

specified range, perform the focus adjustment in the normal

mode again.

* Repeat 2 and 3 until the proper focus is obtained in the normal

mode and the enlargement mode (200%).

Resolution standards

(Unit: lines/mm)

Copy center

Corners

4.5

Normal (100%)

5.0

3.2

Enlargement (200%)

Reduction (50%)

4.5

2.8

7 – 7

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(2) Replace the displayed value with the copy magnification ratio

correction rate obtained in (1).

E. Horizontal copy magnification ratio adjustment

a. This adjustment is performed to meet the displayed magnifica-

tion ratio with the actual one.

(Input value) = (Previously set value) / (Copy magnification

ratio correction rate [%]) ×10

b. This adjustment must be performed in the following cases:

• When the main PWB is replaced.

(Example) When the previously set value is 25, the input

values of examples 1 and 2 are as follows:

• When the EEPROM in the main PWB is replaced.

• When the mirror motor is replaced.

• Example 1: 35 = 25 + (1 × 10)

• Example 2: 15 = 25 + (–1 × 10)

Enter the input value and press the print switch. The value

is stored and the ready lamp lights up.

• When self diag. U2 occurs.

The scanning speed of the mirror base is changed to adjust the

horizontal (paper transport direction) copy magnification ratio.

Eg1:

(1) Put a scale on the original table as shown in the figure below,

and execute simulation 48-02. The machine starts warming up

and the ready lamp lights up. At the same time, the previously

set value ( 1 ∼ 99) is displayed. Under this state, make a nor-

mal copy and calculate the copy magnification ratio.

Copy A, of

which length

is shorter

90 100 110

than original

Scale

(Original)

Scale

10 20 30 40 50 60 70 80 90 50 100 11

120130 140

Eg2:

Copy B, of

which length

is longer

Space

Blank paper

than original

(3) Cancel simulation 48-02.

Note: Input correction can be made in the range of 1 – 99

(simulation set range).

7 – 8

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F. Comparison table of lens values and simulation input values

Zoom correction

(Enlargement)

Zoom correction

(Reduction)

Zoom correction

(Enlargement)

Zoom correction

(Reduction)

Lens

display

value

Lens

display

value

Sim 48-01

—

Sim 48-01 —

+4.0

+3.9

+3.8

+3.7

+3.6

+3.5

+3.4

+3.3

+3.2

+3.1

+3.0

+2.9

+2.8

+2.7

+2.6

+2.5

+2.4

+2.3

+2.2

+2.1

+2.0

+1.9

+1.8

+1.7

+1.6

+1.5

+1.4

+1.3

+1.2

+1.1

+1.0

+0.9

+0.8

+0.7

+0.6

+0.5

+0.4

+0.3

+0.2

+0.1

–0.8

–0.9

–1.0

–1.1

–1.2

–1.3

–1.4

–1.5

–1.6

–1.7

–1.8

–1.9

–2.0

–2.1

–2.2

–2.3

–2.4

–2.5

–2.6

–2.7

–2.8

–2.9

–3.0

–3.1

–3.2

–3.3

–3.4

–3.5

–3.6

–3.7

–3.8

–3.9

–4.0

–0.1

–0.2

–0.3

–0.4

–0.5

–0.6

–0.7

7 – 9

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(4) Loosen the fixing screw of the rear frame side mirror base

drive pulley.

G. Vertical skew adjustment

a. This adjustment is performed when a skew copy is made as

shown below or when a part of the mirror base drive wire or the

No. 1/2 mirror base is replaced.

When La > Lb, rotate the rear frame side mirror base drive

pulley in the arrow direction A. (Do not move the flange and

the mirror base drive pulley shaft.)

When La < Lb, rotate the rear frame side mirror base drive

pulley in the arrow direction B. (Do not move the flange and

the mirror base drive pulley shaft.)

Document

Copy

(1) Put an A3 (11" ×17") white paper on the original glass neatly to

the glass holding plate and the front frame side as shown

below.

Mirror base

drive pully

(Rotate)

Shaft

(Do not rotate)

Pulley fixing screw (Set screw)

(5) Tighten the fixing screw of the mirror base drive pulley.

(6) Perform procedures (1) ∼ (3).

(7) If La=Lb is not satisfied, perform procedures (4) and (5). (If

La=Lb, the adjustment is completed.)

Repeat procedures (1) ∼ (6) until La=Lb is satisfied.

H. Horizontal skew adjustment

Glass retaining plate

A3-size or 11" x 17" blank paper

a. This adjustment is performed in the following cases:

Apply paper front end

to glass retaining plate

Align paper side edge

with front frame

• When a horizontal skew is made.

• When the mirror base drive wire is replaced or its installing

position is changed.

(2) With the original cover open, make a normal (100%) copy on

an A3 (11" ×17") white paper.

• When the No. 1/2 mirror base is replaced or its installing

position is changed.

(3) Measure the width of the black background at the front side

and the rear side.

• When the No. 2/3 mirror base rail is replaced or its installing

position is changed.

Lead edge black background width La

Rear edge black background width Lb

Paper

feed

direction

Document

Copy

7 – 10

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Adjustment procedure (1)

(1) Make an original for adjustment.

Draw parallel lines at 10cm from the both edges of an A3 or

11" × 17" white paper. (Be careful to draw precisely parallel

lines.)

When La>Lb (Lc<Ld): Rotate to increase the height of the front

frame side of the No. 4/5 mirror base unit.

When La<Lb (Lc>Ld): Rotate to decrease the height of the front

frame side of the No. 4/5 mirror base unit.

Open the front cabinet, insert a screwdriver

as shown below, and turn the eccentric

screw to adjust the height of the No. 4/5

mirror base.

Parallel line

10mm

No. 4/5 mirror base

10mm

Blank paper

(2) Set the adjustment original made in (1) as shown below.

Hole for screwdriver

<Note> When turning the eccentric screw, remember how much it

is rotated from the original position. When the eccentric

screw is turned 36 degrees, the height of the front frame

side of the No. 4/5 mirror base is increased or decreased

by 2mm and the difference (La – Lb) is varied by 4mm.

If the above adjustment is not effective, then follow

the Adjustment procedure (2) .

Adjustment procedure (2)

Glass holding plate

Adjustment original

Fit the original edge with the

1 Move the mirror base rail B up and down in the arrow directions

glass holding plate edge

to adjust.

• When La > Lb, shift the mirror base B rail upward by half of

the difference of La – Lb.

(3) Make a normal (100%) copy on an A3 or 11" × 17" white

paper.

• When La < Lb, shift the mirror base B rail downward by half of

the difference of La – Lb.

(4) Measure the distances at four points as shown below:

Paper

discharge

direction

Mirror base rail handle

Loosen

1 scale = 1mm

7 – 11

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(Example) When La=12mm and Lb=9mm, shift the paper exit side

mirror base B rail upward by 1.5mm.

(5) Remove the document reference plate and the right upper side

cabinet, and remove the document table glass.

Document

reference plate

• When Lc > Ld, shift the mirror base B rail downward by half of

the difference of Lc – Ld.

Document table glass

• When Lc < Ld, shift the mirror base B rail upward by half of

the difference of Lc – Ld.

(When moving the mirror base rail, hold the mirror base rail handle.)

Adjust according to procedure (1) so that La=Lb and Lc=Ld are

satisfied.

After completion of the adjustment, turn the mirror base drive

pulley manually to full scan mirror base A and mirror base B,

and check that the mirror bases are not brought into contact

with each other.

(Note) When the mirror bases are moved extremely, they

may be brought into contact. Carefully avoid it.

I. Center shift adjustment

a. This adjustment must be performed in the following cases:

Right upper side cabinet

• The copy (100%) center is shifted from the original center

more than 2mm.

(6) Loosen the three fixing screws of the optical system unit and

slide the optical system unit to adjust the center position.

• When any part of the lens rail or the lens unit is replaced.

(1) make a test chart for center position adjustment. (Refer to the

figure below.)

Original

center

(Original)

Draw a line at the center

Copy

paper

center

Optical system

unit

Copy paper

(A4 or 11" x 8½")

Loosen the

screws

(3pcs.)

2mm

or less

(Copy 1)

Paper transport direction

Move lens is the A direction

(2) Set the test chart for the center position adjustment to the

document reference line, and make a normal (100%) copy with

an A4 or 11" × 8¹⁄₂" paper.

Copy

paper

center

Lens

body

side

(3) Check that the copied image line is at the center of the copy

paper.

2mm

or less

(Copy 2)

Move lens is the B direction

Lens bearing side

2.0mm or less

(7) After adjustment, set the removed parts in the reversed se-

quence. make a copy of the test chart to check that the center

shift is within the specified range (0 ±2.0mm). If the center shift

is within the specified range, the adjustment is completed. If

not, repeat procedures (2) – (7) until it is within the specified

range.

Copy image

(Copy A)

Copy paper

fold

Shift

2.0mm or less

Copy paper

fold

J. Exposure balance adjustment

a. This adjustment is to provide uniform exposure, and must be

performed in the following cases:

(Copy B)

Copy image

Shift

• When the reflector is replaced.

(Paper feed direction)

• When the copy lamp is replaced.

• When the exposure adjustment plate is replaced.

(4) If the error of the copy image line is within the specified range

(0±2.0mm), the adjustment is not required. If not, perform the

following procedures.

(1) Set a half tone paper on the original table and make a half

tone copy at 100%.

(2) If the exposure of the half tone copy is uniform, the adjustment

is not required. If it is varied as shown below, perform the

following procedures.

Exposure

insufficient

Paper

discharge

direction

Half-tone copy

7 – 12

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(3) Remove the original reference plate and the right upper side

cabinet, and remove the original table glass.

(The value displayed before pressing the % key is stored in the

memory by pressing the zoom up key.)

(4) Move the exposure plates a, b, c, and d in arrows directions A

and B to adjust exposure. Moving the plates in the direction of

arrow A makes the copy darker, and moving in the direction of

arrow B makes the copy lighter.

Display section:

During execution of the simulation, the RRC-A value is displayed

on the copy quantity display.

Top digit:

Displays A, b, C, d.

Lower two digits: Displays RRC-A value, RRC-B value, or void

area value.

(1) Put a scale on the original table.

Exposure adjustment

plate b

Exposure adjustment

plate d

Exposure adjustment

plate a

Exposure adjustment

plate c

(Example) If the half tone copy is as shown below, move the

exposure adjustment plate a in the direction of

arrow B to balance exposure.

Scale

Exposure

insufficient

Paper

discharge

direction

Half-tone copy

(5) After adjustment, set the original table glass. Make a copy to

check uniformity of copy density. If the copy exposure is not

uniform, repeat procedures (1) – (5).

(2) Press keys as follows:

C → ë → 0/◊ → ë → 5 →

K. Copy lead edge adjustment

a. This adjustment is performed to provide the maximum effective

copy size and the proper void area, improving separation in the

photoconductor section and the fusing section and reducing dirt

in the fusing section pawls.

0/◊ → PSW → 1 → PSW

Simulation 50-01 is executed and the ready lamp lights up.

The previously set value (1 – 99) is displayed. (RRC-A content)

(3) Set values A and B to zero, and make copies at 100% and

200%.

b. This adjustment must be performed in the following cases.

• When the mirror home position sensor (MHPS) is replaced or

its installing position is changed.

•

0/◊ → 0/◊ → % key →

0/◊ → 0/◊ → PSW (A copy at 100% is made.)

• When the mirror base is replaced.

•

Enlargement key → (Lens shift, ready) → PSW (A copy at

200% is made.)

• When the resist roller and the resist roller clutch are replaced.

• When the main control PWB is replaced.

• When the ADF is installed or disassembled.

* The copy lead edge adjustment is performed with simulation 50-

01 and 50-02.

When the copy lead edge adjustment is made with simulation 50-

01:

In this simulation, the following keys and the display section have

special functions.

Reduction key: Makes the magnification ratio 50%.

Enlargement key: Makes the magnification ratio 200%.

• % key:

Pressing the % key changes A → b → d → A → sequentially,

and the set value corresponding to the display is displayed on

the copy quantity display.

A: RRC-A set value

b: RRC-B set value

C: Lead edge void amount set value

d: Rear edge void amount set value

7 – 13

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(4) Measure the distance between the copy paper lead edge and

the copy image lead edge in each copy. Obtain RRC-A and

RRC-B values from the following formulas.

(8) Put a scale and an A3 (11" × 17") white paper on the original

table as shown below.

If the RRC-A preset value is not proper, the lead edge

position varies in each magnification ratio. The RRC-B is to

adjust the RRC ON timing for fitting the drum image lead

edge and the transfer paper lead edge.

Scale

10 20 30 40

80 90 50 10

110

12 0130 140

50mm

A3(11" x 17") Blank paper

End of scale image

(9) Press the zoom key to display "C" in the lowest digit of the

magnification ratio display. (Void amount adjustment mode)

(10) Make a copy and enter the normal copy lead edge void area

adjustment set value so that the black background edge

comes to the scale 1 – 3mm of the copy image scale.

Full-size(100%) copy

Enlarged(200%) copy

→

→ PSW

• La: Led edge shift at 200% (mm)

• L2: Lead edge shift at 1005 (mm)

• RRC-A = 6.151 × (L1 – L2)

With the above key operation, a copy is made and the adjust-

ment value is inputted. When the adjustment value is changed

by 1, the void area is changed by about 0.13mm. The greater

the adjustment value is, the greater the void amount is.

• RRC-B = 15.385 × L2 – 7.692 × L1

(5) Enter the RRC-A and RRC-B values obtained from the above

formulas with the 10 digit key pad in the same manner as

procedure (3).

End void area

1~3mm

(6) Make copies at 200%, 100%, and 50%, and check variations in

the magnification ratios. (About 1.0mm)

Scale image

If there is a considerable variation, repeat from procedure (3).

(7) Make a normal copy and check that the lead edge image loss

is within the range of 0 ∼ 4mm. If the image loss is outside the

above range, change the RRC-B value and adjust again until

the image loss is within the above range.

Solid edge

Paper end

Full-size(100%) copy

Image loss

0~4mm

Full-size(100%) copy

Note: The above image loss range is effective only for

simulation 50-01, and is not the final one.

7 – 14

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(11) Make a normal copy and check that the image loss and the

void amount are within the specified range.

(Specified range)

[Adjustment procedure]

(1) Put a scale on the original table.

(2) C → P → 0/◊ → P → 5 →

• Image loss: 0 ∼ 4mm

0/◊ → PSW → 2 → PSW

• Void amount: 1 ∼ 3mm

With the above key operation, simulation50-02 is performed

and the machine starts warming up.

Void area

0~3mm

(3) The lower two digits of L1 value is displayed on the copy

quantity display. The top digit is for data identification.

• L1 : Lead edge shift at 200% (|||mm, 3 digits)

• L2 : Lead edge shift at 100% (✕✕✕mm, 3 digits)

Example of display

Scale image

Paper end

• For 42.5mm, the display is 2 5 .

(4) Use the % key and the 10 digit key pad to set A and b values

to zero. Make copies at 100% and 200%.

•

0/◊ → 0/◊ → 0/◊ → % key → 0/◊

→ 0/◊ → 0/◊ → PSW (A copy at 100% is made.)

•

Enlargement key → (Lens shift, ready) → PSW (A copy

at 200% is made.)

(5) Measure the distance between the copy paper lead edge and

the copy image lead edge in each copy. Enter L1 and L2

values with the zoom key and the 10 digit key pad. With this

operation, RRC-A and RRC-B values in simulation 50-01 are

automatically calculated and stored.

Solid edge

Image loss

0~4mm

Full-size(100%) copy

Input procedure

(Example)

(12) Press the clear key and cancel simulation 50-01.

When L1 = 24.5 mm and L2 = 15.0mm:

Check that the lowest digit of the magnification ratio display is

"A," and perform the following key operation.

Note: When the RRC-A and RRC-B values are changed

in simulation 50-01, be sure to adjust the copy lead

edge void area.

2 → 4 → 5 ("45" is displayed on the copy quantity display.)

When adjustment is made with simulation 50-02:

→ % key → 1 → 5 → 0 ("50" is displayed.) → PSW

<Note> The keys and display functions are the same as simulation

50-01. In simulation 50-02, L1 and L2 values can be direct-

ly set. It is easy and simple. The void area adjustment is

also the same as simulation 50-01.

(6) After this, check shift and image loss, and void amount in each

copy similarly to simulation 50-01.

2-4. Original detecting section

A. Original detecting arm unit adjustment

Original detecting arm unit

1 OC switch ON timing adjustment

Execute simulation 40-01. (C → P → 0 → P → 4 → PSW → 1

→ PSW)

36.5 0.5

• Slowly tilt down the original detecting arm unit and loosen the

original cover switch actuator adjustment screw so that the

auto paper selection display lamp turns off when the height

from the table glass to the arm unit top is 36.5 ±0.5mm. Then

slide the actuator to adjust. (If the original cover ON timing is

shifted, the original detecting function may malfunction.)

Glass

Original cover switch actuator

Actuator

adjustment

screw

7 – 15

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* The photo sensors are arranged as follows:

B. Original detecting level adjustment

(Original detecting judgement level input)

Reception shaft

AB series

—

Inch series

This adjustment is to set the reference value for judgement of

presence or absence of an original and to monitor the sensor

status.

—

C → ë → 0 → ë → 4 → 1 →

—

PSW → 2 → PSW

A4R

LTR

17″

At that time, the ready lamp lights up and "1" is displayed on

the copy quantity display.

With the original cover open without original, press the PRINT

button. (The sensor level without original is read.) The copy

quantity display is shifted from 1 to 2.

The manual paper feed tray selection lamp is used to check

open/close of the original cover. It lights up when the original cover

is open, and goes off when closed.

Place a transfer paper of A3 (11″ × 17″) on the original table,

and press the PRINT switch with the original cover open. (The

sensor level with an original is read and the judgement level of

original presence or absence is stored.)

When the original cover close is detected, all the original size dis-

play lamps go off.

1 2

(Light reception level and judgement level check)

<Reference> Detection level setting principle

Light reception level display mode

C → ë → 0 → ë → 4 → 1 →

PSW → 3 → PSW

The sensor level with an original and that without original are read

and the average level (the center value) is stored as the judgement

level.

• The light reception level during execution of the simulation

is displayed on the copy quantity display.

Sensor level without

original

• After execution of the simulation, enter the number cor-

responding to each sensor with the 10-key pad. The original

size display lamp lights up to allow to check the light recep-

tion level of the sensor.

Sensor

level

Judgement level

(Center value)

Sensor level with

original

• The manual paper feed tray selection lamp is used to check

the original cover open/close. The lamp lights up when the

original cover is open, and goes off when closed.

In the case of 1, when the original cover is closed, the

sensor level is fixed to the previous value.

The photo sensor detection check is made by SIM 41-01. (After

inputting the original detecting level, the mode is automatically

changed to the check mode.)

Setting level display mode

C → ë → 0 → ë → 4 → 1 →

Photo sensor check procedure

PSW → 3 → PSW → Magnification ratio auto select key

• With the above key operation, the pause lamp lights up.

Key operation: C → P → 0 → P → 4 → 1 → PSW → 1 → PSW

At that time, all the original size display lamps and the manual tray

selection lamps are lighted. By interrupting the light emitting section

of the original size detection LED, the original size lamps are turned

off.

• Each sensor level set with SIM 41-02 is displayed on the

copy quantity display.

• After execution of this simulation, enter the number cor-

responding to each sensor with the 10-key pad. The original

size display lamp lights up to allow to check the light recep-

tion level of the sensor.

7 – 16

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2. Purpose

[8] SIMULATION

The purpose of the simulations feature is to improve serviceability in

repairs and adjustments.

Since the mechanical adjustments can be performed electrically, the

above purpose is achieved with low costs.

1. Outline

This model is equipped with the simulations feature which allows the

following operations with the keys on the operation panel:

1) Adjustments

3. Operating procedure

2) Setting of specifications and functions

3) Resetting trouble codes

4) Checking operations

Simulations operating procedure

Start

Press the clear key

Press the interruption key

Press the zero key

Press the interruption key

All lamps and indicators

on the operation panel go off.

Ready for entry of the main

test command number

Enter the main test command

number with numeric keys

The main simulations

number is displayed on the

copy quantity display

YES

Is there a sub code?

Press the print key

"00" blinks on the copy

Press the print key

quantity display. Ready for

entry of the sub code.

Enter the sub code with

numeric keys

Press the print key

Is the test

command for operation

check?

The set adjustment value or

the counter value is displayed

on the copy quantity display

YES

To change the set adjustment

value or the counter value,

enter a new value with numeric

keys

Operations according to the

simulations are performed

Enter a new main code

The main code is display on

the copy quantity display

The entered value is displayed

on the copy quantity display

YES

Do you

perform another

simulations?

YES

Is the main

code same?

Is the sub

code display?

Press the print key

Press the clear key

The new set value is stored

Press the clear key

All the lamps and indicators

on the operation panel go off.

Ready for entry of the main

simulations number

Press the clear key

End

8 – 1

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4. List of simulations

Main

code

Sub

code

Main

code

Sub

code

Content

Mirror scanning

—

Maintenance counter display

Maintenance preset counter display

JAM memory display

Optical system sensor check

Lens operation check

Lens operation aging

ADF aging

Total JAM counter display

Total counter display

ADF sensor check

DV counter display

ADF individual load operation check (Paper feed

motor forward rotation)

DV preset counter display

ADF counter display

ADF individual load operation check (Paper feed

motor reverse rotation)

JAM memory/total JAM counter clear

ADF counter clear

ADF individual load operation check (Transport

motor forward rotation)

Drive system check

Automatic developer adjustment

Option setting (ADF shadow erase setting)

Counter mode setting

ADF individual load operation check (Transport

motor reverse rotation)

ADF individual load operation check (Original

stopper solenoid ON)

Destination setting

Sorter sensor check

Drum sensitivity setting

Sorter individual load operation check (Transport

motor)

AE document density setting

Warm-up mode setting

Sorter individual load operation check (Bin motor)

Sorter individual load operation check (Buzzer)

Operation panel display check

Heater lamp check

Rear edge void setting

Copier sensor check (paper sense)

Tray size switch state display

Developer

Copy lamp check

Fusing temperature setting

Process control operation setting

Grid voltage correction test

Grid voltage correction compulsive execution

Image density/drum mark sensor operation test

Process control data display

Process control data display (Latest value)

DL lighting check

BL lighting check

Transport system load operation (Clutch/

solenoid)

Paper feed motor operation check (SF-2118 only)

Warm-up time display and aging

Warm-up omitting

Grid voltage correction (Drum surface/patch)

data display

Intermittent aging

Warm-up time display

Initial grid bias setting

Exposure adjustment

Developing bias output

Main/transfer charger output/grid check (ME)

Main/transfer charger output/grid check (PE)

Main/transfer charger output/grid check (T/S)

Separation charger output

AE sensor characteristics measurement (AE

sensor gain automatic adjustment)

—

Front/rear magnification ratio adjustment

Paper transport direction magnification ratio

adjustment (Mirror speed correction)

ADU sensor check

Copy lead edge adjustment

Lead edge adjustment (Simple type)

Resist amount adjustment

ADU rear end plate aging

ADU matching disc aging

Gate solenoid operation check

ADF stop position adjustment value (normal

paper) setting

ADU individual load operation (Transport motor

paper feed rotation)

ADF stop position adjustment value (thin paper)

setting

ADU individual load operation (Transport motor

paper feed rotation + pick-up clutch)

ADF resist sensor, width sensor adjustment

ADF paper exit sensor adjustment

Take-out buzzer setting

ADU individual load operation (Transport motor

paper feed rotation + paper feed clutch)

—

Toner motor aging

Trouble cancel (Excluding U2 trouble)

Waste toner full (blinking) cancel

U2 trouble cancel

Maintenance counter clear

Maintenance cycle setting

8 – 2

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*1 (Simulation 26-6 Destination setting)

Set value

Model (Destination)

Japan

Set value

Model (Destination)

EX inch series

SEC

EX AB series

SECL

SEEG

SUK

EX inch series (for FC)

EX AB series (for FC)

Taiwan/China

SCA

Cassette size switch table

SW2

SW1

SW0

Inch series

No cassette

WLT

AB series

Inch series (For FC)

AB series (For FC)

Taiwan/China

No cassette

WLT

No cassette

(extra)

INV

8.5" × 13"

INV

8.5" × 13"

(extra)

A4R

LTR

A4R

B5R

LTR

A4R

(extra)

|: Switch ON

✕: Switch OFF

8 – 3

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5. Details of simulations

Simulation input procedure: C → ë → 0 → ë

Main code

Sub code

Content

Mirror operation check

When the print button is pressed, the mirror is scanned at a speed corresponding to the currently set copy

magnification ratio.

The copy magnification ratio can be arbitrarily set.

Optical system sensors (MHPS, LHPS) state display

ON/OFF state of the optical system sensor can be monitored by the LED on the operation panel.

Sensor name

MHPS

Operation panel LED

Paper empty lamp (ç)

JAM lamp (ê)

LHPS

Lens operation check

The lens unit moves to the following positions of the magnification ratios continuously.

AB series: 100% → 115% → 122% → 141% → 200% → 86% → 81% → 70% → 50% → 100%

Inch series: 100% → 121% → 129% → 141% → 200% → 95% → 77% → 64% → 50% → 100%

Lens aging

The operation of SIM 1-3 is repeated continuously.

ADF aging

The ADF original transport operation is performed.

ADF sensors states display

The ADF sensors ON/OFF states can be monitored with the LED on the operation panel.

When the third digit of the multi display is “A,” the following display is made.

Sensor name

Original set sensor

Operation panel LED

JAM lamp (ê)

Resist sensor

Paper empty sensor (ç)

Timing sensor

Drum position jam lamp (▼)

Resist position jam lamp (▼)

ADF position jam lamp (▼)

Paper exit position jam lamp (▼)

Manual paper feed selection lamp

Repulsion sensor

ADF open/close sensor

Paper feed cover sensor

Reversing section cover sensor

If, at that time, the magnification ratio display key is pressed, the third digit of the multi display is changed to “B”

and the following display is made.

Sensor name

Operation panel LED

First step cassette lamp

Tray width sensor (297mm, 11")

Tray width sensor (257mm)

Tray width sensor (210mm, 8.5")

Tray width sensor (182mm)

Tray vertical sensor (240mm)

Tray vertical sensor (300mm)

Original width size sensor

Second step cassette lamp

Third step cassette lamp

Fourth step cassette lamp

Resist position jam lamp (▼)

Paper exit position jam lamp (▼)

Manual feed selection lamp

ADF individual load operation check (paper feed motor forward rotation)

ADF individual load operation check (paper feed motor reverse rotation)

ADF individual load operation check (transport motor forward rotation)

ADF individual load operation check (transport motor reverse rotation)

ADF individual load operation check (Repulsion motor forward rotation) A57 only

ADF individual load operation check (Paper feed solenoid)

ADF individual load operation check (Reverse rotation solenoid) A57 only

8 – 4

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Main code

Sub code

Content

ADF individual load operation check (paper feed motor + paper feed solenoid)

ADF individual load operation check (transport motor forward rotation + repulsion motor forward rotation) A57 only

Sorer sensor state display

The ADF sensor ON/OFF states can be monitored with the LED on the operation panel.

When the third digit of the multi display is “A,” the following display is made.

Sensor name

Entrance sensor

Operation panel LED

Jam lamp (ê)

Tray paper presence/empty sensor

Upper limit sensor

Paper empty sensor (ç)

Manual feed selection lamp

Resist position jam lamp (▼)

Drum position jam lamp (▼)

Paper exit jam lamp (▼)

Lower limit sensor

Bin home position sensor

Take-out sensor

Alignment bar home sensor

ADF section jam lamp (▼)

S54 only

If, at that time, the magnification ratio display key is pressed, the third digit of the multi display is changed to “B”

and the following display is made.

Sensor name

Pinch (hold) home sensor

Stapler home sensor

Operation panel LED

Jam lamp (ê)

Paper exit position jam lamp (▼) S54 only

S54 only

Stapler paper sensor

Paper empty jam lamp (ç)

S54 only

Stapler near end sensor

Resist position jam lamp (▼)

Sorter individual load operation check (Transport motor)

Sorter individual load operation check (Bin motor)

Sorter individual load operation check (Buzzer)

Sorter individual load operation check (Alignment motor)

Sorter individual load operation check (Pinch hold motor)

Operation panel display check

All the LED’s on the operation panel are lighted for 5 sec.

When the automatic original feed unit is installed, the original feed lamp and the original remaining lamp are also

lighted for 5 sec.

Heater lamp lighting check

The heater lamp is turned of/off in the following sequence.

0.5s

Copy lamp lighting check

The copy lamp is turned on/off in the following sequence.

0.5s

Full power ON

Data ON (Can be set by the exposure key arbitrarily

8 – 5

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Main code

Sub code

Content

DL lamp lighting check

The discharge lamp is lighted for 30 sec.

BL lamp lighting check

The blank lamp is turned on/off every 0.5 sec.

PSPS operation check

The separation pawl is turned on/off 30 times in the following sequence.

PSPS

0.5s

Paper feed motor operation check

The paper feed motor in the second step of the main body is activated. When the PFU is installed, the paper feed

motors in the first and the second steps of the PFU are activated.

Warm-up time display and aging

After execution of the simulation, warm-up is started, and the swarm-up time is displayed every second on the

copy quantity display. When warm-up is completed (RPL ON), count adding of the display is stopped.

Press the CA key to clear warm-up time display, set the copy quantity and press the PRINT button to make the set

number of copies repeatedly.

Warm-up omitting

After completion of the simulation, the machine goes to the ready state. (RPL ON)

Intermittent aging

After execution of the simulation, the machine starts warm-up. After completion of warm-up, press the CA key to

clear warm-up time display, set the copy quantity and press the PRINT button to make the set number of copies

repeatedly.

After the interval time (2 min) from completion of making the set number of copies, the machine resumes copying.

Warm-up time display

Aging function is deleted from SIM 7-1.

DVBIAS check

The developing bias is turned on for 30 sec.

MTHV (main, transfer), grid check (ME)

The main/transfer charger is turned on for 30 sec.

For the grid bias, the ME value is outputted.

MTHV (main, transfer), grid check (PE)

The main/transfer charger is turned on for 30 sec.

For the grid bias, the PE value is outputted.

MTHV (main, transfer), grid check (T/S)

The main/transfer charger is turned on for 30 sec.

For the grid bias, the T/S value is outputted.

SHV (separation) check

The separation charger is turned on for 30 sec.

ADU sensor state display (SF-2120 only)

On/off states of the sensors in the ADU are monitored with the LED on the operation panel.

Sensor name

Operation panel LED

First step cassette lamp

ADU open/close sensor

Tray paper sensor

Paper empty lamp (ç)

ADU paper entry sensor

ADU paper transport sensor

Alignment plate home sensor

Rear edge plate home sensor

Manual paper feed selection lamp

Resist position jam lamp (▼)

Drum position jam lamp (▼)

Paper exit position jam lamp (▼)

8 – 6

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Main code

Sub code

Content

ADU rear edge plate aging (SF-2120 only)

The rear edge plate is returned to the initial position and shifted to the following size positions.

AB series

A4R

B5R

INV

Home position

Inch series

WLT

LTR

Home position

AB series foolscap area

A3 B4 FC

A4R

Inch series foolscap area

WLT LG LTR

INV

ADU alignment plate aging (SF-2120 only)

The alignment plate is returned to the initial position and shifted to the following size positions.

AB series

A4R

B5R

INV

Home position

Inch series

WLT

LTR

Home position

AB series foolscap area

A3 B4 FC

A4R

Inch series foolscap area

WLT LG LTR

INV

—

Gate solenoid ON/OFF check (SF-2120 only)

The gate solenoid is turned on/off periodically.

Toner motor aging

The toner motor is turned on.

—

Cancel of troubles (except for U2)

Troubles (except for U2) are canceled and the simulation is also canceled automatically.

—

Cancel of waste toner full (è blinks)

The waste toner full indication (è blinks) is canceled, and the simulation is also canceled automatically.

—

U2 trouble cancel

U2 trouble is canceled, and the simulation is automatically canceled.

(Note)

Maintenance counter clear

The maintenance counter is cleared and the maintenance counter value is displayed on the copy quantity display.

(“000” is displayed because the counter value is cleared.)

(Note) Cleared by entering the sub code “01.”

8 – 7

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Main code

Sub code

Content

Maintenance cycle setting

Used to set the lighting cycle of the maintenance lamp (è).

When this simulation is executed, the currently set maintenance cycle is displayed on the copy quantity display.

After setting the number, press the print button to memory the value.

Set value Maintenance cycle

50,000 sheets

2,500 sheets

← Initial value

5,000 sheets

10,000 sheets

25,000 sheets

Free (Not lighted.)

Maintenance counter display

The maintenance counter value is displayed on the copy quantity display.

Maintenance preset counter display

The maintenance cycle set with SIM 21-1 is displayed on the copy quantity display.

Jam memory display

The cause (position) of the jam occurred in copying is displayed.

When this simulation is executed, the jam cause (jam position) is displayed on the jam cause display. By pressing

the magnification ratio key, the history of jam causes can be checked sequentially.

Total jam counter display

The total number of jams occurred in copying is displayed on the copy quantity display.

Total counter display

The total counter value is displayed on the copy quantity display.

Developer counter display

The counter value of the developer which is installed is displayed on the copy quantity display.

Developer preset counter display

The developer replacement cycle (mini maintenance cycle for Japan) of the developer which is installed is

displayed on the copy quantity display.

ADF counter display

The number of originals transported by the ADF is displayed on the copy quantity display.

ADU counter display (SF-2120 only)

The number of paper which entered the ADF is displayed on the copy quantity display.

Staple counter display

The number of stapling is displayed on the copy quantity display.

Trouble memory display

“A” is displayed on the third digit of the copy quantity display, and the latest trouble code (main code) is displayed

on the second and the third digit.

When the PRINT button is pressed at that time, the sub code of the corresponding trouble is displayed during the

PRINT button is being pressed.

When the magnification ratio key is pressed while the main code is displayed, the previous trouble is displayed.

Maximum 20 recent troubles are stored.

8 – 8

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Main code

Sub code

Content

Jam memory/total jam counter clear

The cause (position) of a jam which occurred during copying and the jam total counter are cleared, and the jam

total counter value is displayed on the copy quantity display. (“000” is displayed because the counter is cleared.)

Trouble memory clear

The main code and the sub code of a trouble is cleared.

(“000” is displayed because the memory is cleared.)

ADU counter clear (SF-2120 only)

Used to clear the ADU counter and to display the ADU counter value on the copy quantity display.

(“000” is displayed because the counter is cleared.)

ADF counter clear

Used to clear the ADF counter and to display the ADF counter value on the copy quantity display.

(“000” is cleared because the counter is cleared.)

Staple counter clear

Used to clear the staple counter and to display the staple counter value on the copy quantity display.

(“000” is displayed because the counter is cleared.)

Drive system check

Used to turn on the main motor, the developing bias, and the discharge lamp for 3 min.

The input value of the toner density is displayed on the second digit of the copy quantity display during the main

motor is rotating. The third digit indicates the color of developer.

Copy quantity display

Color of developer

Third digit Second, first digit

Black

Red

1 ∼ 99

Blue

Automatic developer adjustment

Same as SIM 25-1. The average value of toner density sensor inputs is stored as the toner density adjustment

value after 3 min from starting the main motor rotation.

The display on the copy quantity display is same as SIM 25-1.

Option setting

Set to “1” only when the option desk is CM16 (one-step cassette).

The initial setting is “0.”

Count mode setting

Used to set the count mode of the total counter, the developer counter (mini maintenance counter for Japan), and

the maintenance counter in A3/WLT copy.

When this simulation is executed, the currently set count mode is displayed on the copy quantity display.

Enter the set value and press the PRINT button to store it.

Set value

Total/Developer counter

Double count

Maintenance count

Double count

Single count

← Initial value

Single count

Double count

Single count

8 – 9

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Main code

Sub code

Content

Destination setting

Used to set the destination (Japan, SEC, etc.).

When this simulation is executed, the currently set destination is displayed on the copy quantity display.

Enter the set value and press the PRINT button to store it.

Set value

Destination

Japan

SEC

SECL

SEEG

SUK

SCA

EX inch series

EX AB series

EX inch series (FC)

EX AB series (FC)

Taiwan/China

Drum sensitivity setting

Used to set the drum sensitivity.

When this simulation is executed, the currently set drum sensitivity is displayed on the copy quantity display.

Enter the set value and press the PRINT button to store it.

Set value Drum sensitivity

← Initial value

AE original density setting

Used to set the original density.

When this simulation is executed, the currently set original density is displayed on the copy quantity display.

Enter the set value and press the PRINT button to store it.

Set value

Original density

Normal

← Initial value

Thin original

When a dark original is copied in the AE mode, the lead edge (about 4mm) is not copied. If it is necessary to copy

the lead edge, set this simulation to “1.”

Warm-up mode setting

Used to set the main motor operation mode during warm-up.

When this simulation is executed, the currently set warm-up mode is displayed on the copy quantity display.

Enter the set value and press the PRINT button to store it.

Set value

Warm-up mode

Normal mode

The main motor rotates until warm-up is completed.

← Initial value

Toner save mode setting (Japan/SUK only)

Used to set ON/OFF of the toner save mode.

When this simulation is executed, the currently set value is displayed on the copy quantity display.

Enter the set value and press the PRINT button to store it.

Set value

Toner save mode

← Initial value

OFF

8 – 10

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Main code

Sub code

Content

Rear edge void setting

Used to set YES/NO of the paper rear edge void.

When this simulation is executed, the currently set rear edge void mode is displayed on the copy quantity display.

Enter the set value and press the PRINT button to store it.

Set value

Rear edge void

Yes

← Initial value

Auto shut off mode cancel

In Japan/SEC, the auto shut off function cannot be canceled by the user. In can be canceled by a serviceman.

(This simulation is available for all the destinations.)

Enter the set value and press the PRINT button to store it.

Set value

Set content

Auto shut off cancel inhibited

Auto shut off cancel allowed

← Initial value

When this simulation is set to “1,” the value of “P3” in the user simulation becomes “0” and the mode change

cannot be made in the user simulation.

When this simulation is set to “0,” the value of “P3” in the user simulation is set as the initial value.

Paper sensor state display

Used to monitor the ON/OFF state of the sensors in the main body with the LED on the operation panel.

Sensor name

PID

Operation panel LED

Manual feed tray selection lamp

Drum position jam lamp (▼)

PPD

PPD1

PPD2

PPD3

PPD4

POD

Resist position jam lamp (▼)

Main body lower step tray position jam lamp (▼)

Paper empty lamp (ç)

Jam lamp (ê)

Paper exit position jam lamp (▼)

ADU position jam lamp (▼)

POD2

PED1

PED2

PED3

PED4

← SF-2120 only

Body upper step tray selection lamp (▼)

Body lower step tray selection lamp

PFU upper step tray selection lamp

PFU lower step tray selection lamp

← SF-2020 only

Tray size switch state display

Used to monitor the ON/OFF state of the tray size switch with the LED on the operation panel.

Selection of trays is made by the tray selection key.

Switch name

SW2

Operation panel LED

Paper exit position jam lamp (▼) Switches are arranged

in the sequence of

SW2, SW1, and SW0

from the paper exit side.

SW1

Drum position jam lamp (▼)

SW0

Resist position jam lamp (▼)

Tray position Each tray selection LED

8 – 11

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Main code

Sub code

Content

Original sensor check

Used to display the judgement result of the original sensor on the operation panel LED.

The original sensor values are read sequentially. If the sensor is interrupted (judged as presence of an original),

the LED corresponding to the sensor position is turned on.

Sensor name

PD0

Operation panel LED

Original size LED A5/INV

Original size B5

PD1

PD2

Original size A4/LT

PD3

Original size B5R

PD4

Original size A4R/LTR

Original size B4/LG

PD5

PD6

Original size A3/WLT

Manual feed tray selection LED

PD1 PD2 PD3 PD4 PD5 PD6

OCSW

When the original cover is closed, the original sensor is not read and it is judged as no original at all. (All the

original size LED’s are turned off.)

Since the machines for Japan/Taiwan are not equipped with the PD0 sensor, the original size LED display is not

made.

For the other areas, PD1 and PD3 sensors are not provided and the original size LED display is not made.

Original sensor adjustment

The original sensor input values of original presence and original empty are read to set the original judgement

level.

When this simulation is executed, “1” is displayed on the copy quantity display and the ready lamp lights up.

First, in order to read the original sensor input value of original empty, press the PRINT button without an original

on the original table with the original cover open. The copy quantity display will change to “2.”

Then, in order to read the original sensor input value of original presence, press the PRINT button with an A3

paper on the original table. The copy quantity display will change to “0.” Then the operation of SIM 41-1 is

performed.

After completion of reading the original sensor inputs, the average value of the two inputs is stored as the original

judgement level.

Original sensor light reception level and original judgement level display

Used to display the original sensor light reception level and the original judgement level on the copy quantity

display.

Display is selected by the magnification ration selection key.

Since there are two or more display items, the third digit is used to make distinction between the light reception

level and the original judgment level, and the lower two digits are used to display the data. The currently set

original sensor is displayed by the LED on the original size display section. The relationship between the sensor

name and the original size LED is the same as SIM 41-1.

Copy quantity display

Original size

display

Display data

3rd digit

2nd, 1st digits

Current light

A5/INV

PD0 current light reception level

PD1 current light reception level

PD2 current light reception level

PD3 current light reception level

PD4 current light reception level

PD5 current light reception level

PD6 current light reception level

PD0 original judgement level

PD1 original judgement level

PD2 original judgement level

PD3 original judgement level

PD4 original judgement level

PD5 original judgement level

PD6 original judgement level

Manual feed tray selection LED

reception level

A4/LT

B5R

A4R/LTR

B4/LG

A3/WLT

A5/INV

Original

judgement level

A4/LT

B5R

A4R/LTR

B4/LG

A3/WLT

OCSW

The data displayed by the lower two digits are A/D input values of the original sensor, and is expressed in

hexadecimal. (Display range: 0 ∼ FFh)

The light reception level display is changed only when the original cover is open.

8 – 12

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Main code

Sub code

(Note)

Content

Developer counter clear

Used to clear the currently installed developing unit counter and to display the developer counter value on the

copy quantity display.

(“000” is displayed because the counter is cleared.)

(Note) The counter is cleared by entering the sub code “01.”

Fusing temperature setting

Used to set the fusing control temperature.

When this simulation is executed, the currently set fusing temperature is displayed on the copy quantity display.

The set value is changed by pressing the magnification ratio display key.

Select the fusing temperature and press the PRINT button to store it.

The setting range is 160 ∼ 205°C (in the increment of 5°C).

Only in the SF-2120, pressing the duplex key lights up the single → duplex (even number of originals) lamp and

the fusing temperature for duplex copy can be set. The setting procedure is the same as the normal one.

Process control operation setting

Used to set valid/invalid of the grid voltage correction, optical dirt correction, and drum membrane decrease

correction.

When this simulation is executed, the currently set value is displayed on the copy quantity display.

To make each correction mode valid, enter the sum of the codes of the correction modes, and press the PRINT

button to store it.

Code

Correction mode

Grid voltage correction

Optical dirt correction

Drum membrane decrease correction

The initial value is “7.” (All corrections are valid.)

The grid voltage correction is always valid regardless of set value. (Even if it is set to “0,” the grid voltage

correction is not canceled.)

Grid voltage correction operation test

Used to perform the grid voltage correction and to display the measure data on the copy quantity display.

When this simulation is executed, the grid voltage correction is automatically performed. The image density

sensor is read when -30V, 0V, and +30V are applied to the latest patch forming grid voltage.

After completion of the operation, the measure data are displayed on the copy quantity display.

Since there are two or more display items, the third digit is used to make distinction between the light reception

level and the original judgment level, and the lower two digits are used to display the data.

The display is selected by the magnification ratio key.

Copy quantity display

Display data (Image density sensor A/D input value)

3rd digit

2nd, 1st digits

Measured

data

Drum surface data (patch forming grid voltage) –30V is applied.

Drum surface data (patch forming grid voltage) is applied.

Patch data (patch forming grid voltage) -30V is applied.

Patch data (patch forming grid voltage) is applied.

Patch data (patch forming grid voltage) +30V is applied.

The data displayed by the lower two digits are A/D input values of the original sensor, and is expressed in

decimal. (Display range: 0 ∼ 99)

The patch forming grid voltage after execution of this simulation can be checked with SIM 44-9.

8 – 13

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Main code

Sub code

Content

Grid voltage correction compulsory execution

The grid voltage correction is forcibly executed during the simulation.

When the operation is completed, the patch forming grid voltage after grid voltage correction is displayed on the

copy quantity display. The relationship between the display value and the patch forming grid voltage value is as

shown below.

Display value

Patch forming grid voltage

200 V

410 V

Display range: 8 ∼ 99

When the display is

changed by 1, the

voltage is changed by 5V.

655 V

The drum surface data and the patch data after execution of this simulation can be checked with SIM 44-10.

(Note) When this simulation is executed, the patch forming grid voltage is stored, and the grid voltage amount may

be changed from the patch forming grid voltage before and after execution.

Image density sensor, drum mark sensor operation test

Used to read the light reception level for the light emitting amount of the image density sensor and the drum mark

sensor and to display on the copy quantity display.

When this simulation is executed, the light emitting levels of the image density sensor and the drum mark sensor

are changed in 5 steps and each light reception level is read.

After completion of operation, the measured data are displayed on the copy quantity display.

Since there are two or more display items, the third digit is used to make distinction between the light reception

level and the original judgment level, and the lower two digits are used to display the data.

The display is selected by the magnification ratio key.

Copy quantity display

Display data

3rd digit

2nd, 1st digits

Measured

data

Image density sensor input value, when light emitting 1V

Image density sensor input value, when light emitting 2V

Image density sensor input value, when light emitting 3V

Image density sensor input value, when light emitting 4V

Image density sensor input value, when light emitting 5V

Drum mark sensor level, when light emitting 1V

Drum mark sensor level, when light emitting 2V

Drum mark sensor level, when light emitting 3V

Drum mark sensor level, when light emitting 4V

Drum mark sensor level, when light emitting 5V

Judgement

data

The data displayed with the lower two digits:

“A” ∼ “E”: Image density sensor A/D input value. Converted into a decimal number and displayed. (Display range:

0 ∼ 99)

“F” ∼ “J”: Drum mark sensor level is displayed with 0 and 1.

“0”: Drum mark sensor sensing impossible

“1”: Drum mark sensor sensing possible

8 – 14

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Main code

Sub code

Content

Grid voltage correction, optical dirt correction, drum membrane decrease correction data display

Used to display each correction data of the grid voltage correction, the optical dirt correction, and the drum

membrane decrease correction on the copy quantity display.

Since there are two or more display items, the third digit is used to make distinction between the light reception

level and the original judgment level, and the lower two digits are used to display the data.

The display is selected by the magnification ratio key.

Copy quantity display

Display data

3rd digit

2nd, 1st digits

8 ∼ 99

Patch forming grid voltage (initial value)

Gird voltage when the display value is 50 = 410V

When the display value is decreased by 1, the grid voltage is decreased

by 5V.

When the display value is increased by 1, the grid voltage is increased by

5V.

1 ∼ 99

Normal mode grid voltage (initial value)

Display value × 10V is the grid voltage output.

0 ∼ 99

Optical dirt correction reference value

The AE sensor input value measured after execution of SIM 46-1.

(Converted into a decimal number and displayed.)

0 ∼ 99

Drum rotating time (accumulated value)

When the display value is increased by 1, it corresponds to one hour.

0 ∼ 99

DV unit (black) rotating time (accumulated value)

When the display value is increased by 1, it corresponds to one hour.

Grid voltage correction, optical dirt correction, drum membrane decrease correction data display (the newest value)

Used to display each correction data of the grid voltage correction, the optical dirt correction, and the drum

membrane decrease correction on the copy quantity display.

Since there are two or more display items, the third digit is used to make distinction between the light reception

level and the original judgment level, and the lower two digits are used to display the data.

The display is selected by the magnification ratio key.

Copy quantity display

Display data

3rd digit

2nd, 1st digits

8 ∼ 99

Patch forming grid voltage (latest value)

Gird voltage when the display value is 50 = 410V

When the display value is decreased by 1, the grid voltage is

decreased by 5V.

When the display value is increased by 1, the grid voltage is

increased by 5V.

1 ∼ 99

0 ∼ 10

0 ∼ 20

Normal mode grid voltage (latest value)

Display value × 10V is the grid voltage output.

Optical dirt correction reference value

Display value × 0.7V = Copy lamp voltage correction value

Drum membrane decease correction value

Drum membrane decease correction value when normal mode exp. 1

Trouble data display when the grid voltage correction is performed.

0 --------- No trouble

31 ∼ 35

31 ∼ 35 --- Trouble (The sub code is displayed.)

8 – 15

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Main code

Sub code

Content

Drum voltage correction drum surface data, patch data display

Used to display the drum surface data and the patch data after execution of the grid voltage after simulation 44-5,

6 or during normal operation is displayed on the copy quantity display.

Since there are two or more display items, the third digit is used to make distinction between the light reception

level and the original judgment level, and the lower two digits are used to display the data.

The display is selected by the magnification ratio key.

Copy quantity display

Display data

(Image density sensor A/D input value)

3rd digit

2nd, 1st digits

Measured

data

Drum surface data (patch forming grid voltage) –30V is applied.

Drum surface data (patch forming grid voltage) is applied.

Patch data (patch forming grid voltage) –30V is applied.

Patch data (patch forming grid voltage) is applied.

Patch data (patch forming grid voltage) +30V is applied.

The data displayed by the lower two digits are A/D input values of the original sensor, and is expressed in

decimal.

Initial grid bias setting

Used to set the initial grid bias in the normal mode, the photo mode, the toner save mode, and the patch

measurement mode.

When this simulation is executed, war-up is started and the currently set normal mode initial grid bias is displayed

on the copy quantity display.

Since there are two or more display items, the third digit is used to make distinction between the light reception

level and the original judgment level, and the lower two digits are used to display the data.

The display is selected by the magnification ratio key.

Copy quantity display

Display data

3rd digit

2nd, 1st digits

1 ∼ 99

Initial grid bias data (normal mode)

Set the grid voltage to 750V.

When the grid voltage is decreased by 1, the voltage is decreased by

5V. When the grid voltage is increased by 1, the voltage is increased

by 5V.

Initial grid bias data (Photo mode)

Set the grid voltage to 750V.

When the grid voltage is decreased by 1, the voltage is decreased by

5V. When the grid voltage is increased by 1, the voltage is increased

by 5V.

Initial grid bias data (Toner save mode)

Set the grid voltage to 750V.

When the grid voltage is decreased by 1, the voltage is decreased by

5V. When the grid voltage is increased by 1, the voltage is increased

by 5V.

Initial grid bias data (Patch measurement mode)

Display value “41” : Set to 410V.

Setting cannot be changed.

Enter the set value and press the PRINT button to store the value and start copying. After completion of setting,

press the CA key to cancel the adjustment mode.

Copying without grid bias correction

Used to make copying without grid bias correction and drum mark check.

When this simulation is executed, warm-up is started and “A 1” is displayed on the copy quantity display (for

identification of execution of this simulation.)

During warm-up, drum mark check is not performed.

After completion of warm-up, press the PRINT button to start copying.

After starting copying, the grid bias correction is not performed.

The number of multi copy cannot be set. (Single copy only)

After checking the operation, press the CA key to cancel the mode.

(Note) This simulation is used to judge whether the F2 trouble is caused by the grid bias correction or by the

process or the high voltage section trouble.

8 – 16

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Main code

Sub code

Content

Exposure level adjustment

Used to set the copy density (copy lamp output voltage) in each exposure mode.

When this simulation is executed, warm-up is started and the currently set manual (ME) upper limit value is

displayed on the copy quantity display.

When warm-up is completed, the ready lamp lights up. When the PRINT button is pressed, copying is performed

in the currently set exposure mode.

Since there are two or more display items, the third digit is used to make distinction between the light reception

level and the original judgment level, and the lower two digits are used to display the data.

The display is selected by the magnification ratio key, the exposure key, or the density select key.

Copy quantity display

Exposure section

display

Display data

3rd digit

2nd, 1st digits

1 ∼ 99

exp. 1 Manual (ME) upper limit value

exp. 5 Manual (ME) lower limit value

ME + PE exp. 1 Manual (ME) toner save upper limit value

ME + PE exp. 5 Manual (ME) toner save lower limit value

exp. 1 Photo (PE) upper limit value

exp. 5 Photo (PE) lower limit value

exp. 1 Auto (AE) slant

exp. 5 Auto (AE) lower limit value

AE + PE exp. 1 Auto (AE) toner save slant

AE + PE exp. 5 Auto (AE) toner save lower limit

The setting range is 1 ∼ 99. The greater the set value is, the brighter the copy density is.

After completion of setting, press the CA key to cancel the adjustment mode.

(Note) Auto (AE) slant and auto (AE) toner save slant must be set to 0.

—

AE sensor characteristics measurement

Used to read the E sensor input value when the copy lamp is lighted at the specified voltage and to set the AE

sensor gain.

When this simulation is executed, the mirror base is initialized and fed to the measurement position. After

completion of feeding, the previously measured AE sensor input value is displayed on the copy quantity display

and the ready lamp is lighted.

Press the PRINT button, and the copy lamp is lighted at the specified voltage interval. The AE sensor input value

at that time is read and stored. After completion of reading, the copy lamp is turned off and the measured AE

sensor is displayed on the copy quantity display.

At that time, the AE sensor gain is automatically adjusted.

(Note) Place 4 or 5 white sheets on the table glass during execution of this simulation.

Front/rear direction magnification ratio adjustment

Used to set the vertical (front/rear direction) copy magnification ratio.

When this simulation is executed, warm-up is started and the currently set normal correction value is displayed on

the copy quantity display.

Since there are two or more display items, the third digit is used to make distinction between the light reception

level and the original judgment level, and the lower two digits are used to display the data.

The display is selected by the magnification ratio key.

Copy quantity display

Display data

3rd digit

2nd, 1st digits

1 ∼ 99

Normal correction value

Zooming correction value (reduction)

Zooming correction value (enlargement)

The setting range is:

normal correction range; 1 ∼ 99 (initial value: 50)

zooming correction value; 10 ∼ 90 (initial value: 50)

After completion of setting, press the CA key to cancel the adjustment mode.

8 – 17

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Main code

Sub code

Content

Paper transport direction magnification ratio adjustment

Used to set the horizontal (paper transport direction) magnification ratio.

When this simulation is executed, warm-up is started and the currently set mirror speed correction value is

displayed on the copy quantity display.

When warm-up is completed, the ready lamp is lighted. Press the PRINT button to start copying.

After completion of setting, press the CA key to cancel the adjustment mode.

Lead edge image position adjustment

Used to set the lead edge image position (RRC ON timing), the lead edge void position (blank lamp ON timing),

and the rear edge void position (grid output timing).

When this simulation is executed, warm-up is started and the currently set resist adjustment A is displayed on the

copy quantity display.

Since there are two or more display items, the third digit is used to make distinction between the light reception

level and the original judgment level, and the lower two digits are used to display the data.

The display is selected by the magnification ratio key.

Copy quantity display

Display data

3rd digit

2nd, 1st digits

1 ∼ 99

Resist adjustment A

Resist adjustment B

Lead edge void adjustment

Rear edge void adjustment

Set range: 1 ∼ 99

After completion of setting, press the CA key to cancel the adjustment mode.

(Lead edge adjustment procedure)

1 Set resist adjustment A and B to 0. Make 100% and 200% copy.

2 Measure the distance between the paper lead edge and the image lead edge in each copy mode.

3 Enter the measured value in the following formula to obtain resist adjustment A and B.

200% lead edge shift : L1

100% lead edge shift : L2

(Resist adjustment A) = 6.151 × (L1 – L2)

(Resist adjustment B) = (15.385 × L2) – (7.692 × L1)

4 Set the obtained values.

Lead edge image position adjustment (measurement value substitution formula)

Used to set the lead edge image position and the lead edge void position similarly with SIM 50-1.

This simulation allows to directly enter the measured values L1 and L2 for setting of the lead edge image position.

Copy quantity display

Display data

3rd digit

2nd, 1st digit

1 ∼ 99

Lead edge void adjustment

Rear edge void adjustment

(Example)

When L1 = 24.5mm, enter

5 .

After entering, the copy quantity display shows “A45.”

Note for entering L1 and L2 values

• The significant digits of L1 and L2 are 3 digits. (Only lower two digits are displayed. The top digit is not

displayed.)

• Enter L1 and L2 to one decimal place. (If the first decimal place is 0, enter 0 at the end.)

• If four digits is entered for L1 or L2, the last three digits are effective. If only two digits is entered, the lowest

digit (1st digit) of the previous input is used as the top digit (3rd digit) of this time.

(Example) If the previous input is 245, and the current input is 24, the stored value is 524.

• Only when the PRINT button is pressed after setting L1 and L2, resist adjustment A and B in SIM 50-1 are

calculated and revised (stored). Pressing the magnification ratio key or the CA key cannot revise the resist

adjustment A and B.

8 – 18

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Main code

Sub code

Content

Resist amount adjustment

Used to set the warp amount of paper in the resist section.

When this simulation is executed, warm-up is started and the currently set tray resist amount is displayed on the

copy quantity display.

After completion of warm-up, the ready lamp is lighted. Press the PRINT button to start copying.

Since there are two or more display items, the third digit is used to make distinction between the light reception

level and the original judgment level, and the lower two digits are used to display the data.

The display is selected by the magnification ratio key.

Copy quantity display

Display data

3rd digit

2nd, 1st digits

1 ∼ 99

Tray resist amount

Manual feed resist amount

ADU paper feed resist amount

← SF-2120 only

Set range: 1 ∼ 99

After completion of setting, press the CA key to cancel the adjustment mode.

ADU alignment plate home position adjustment (SF-2120 only)

Used to adjust the alignment plate home position by entering figures.

When this simulation is executed, the currently set adjustment value is displayed on the copy quantity display.

The setting range is 1 ∼ 8 ∼ 30.

The smaller the set value is, the wider the alignment plate home position is.

ADU rear edge plate home position adjustment (SF-2120 only)

Used to adjust the rear edge plate home position by entering figures.

When this simulation is executed, the currently set adjustment value is displayed on the copy quantity display.

The set range is 1 ∼ 8 ∼ 30.

The smaller the set value is, the wider the rear edge plate home position is.

ADU transport motor adjustment (SF-2120 only)

Used to vary the transport motor speed in the case of ADU paper

entry.

When this simulation is executed, the currently set adjustment value is displayed on the copy quantity display.

Enter the set value and press the PRINT button to store it.

Set value Transport speed

150 mm/s

130 mm/s

100 mm/s

(R)ADF (single) stop position setting

Used to set the original stop position in ADF (single) transport.

When this simulation is executed, the currently set stop position data is displayed on the copy quantity display.

Enter the set value and press the PRINT button to store it.

Setting range: 0 ∼ 15

(R)ADF (duplex) stop position setting

Used to set the original stop position in ADF (duplex) transport.

When this simulation is executed, the currently set stop position data is displayed on the copy quantity display.

Enter the set value and press the PRINT button to store it.

Setting range: 0 ∼ 15

ADF resist sensor adjustment

Used to adjust the ADF resist sensor original judgement level.

When this simulation is executed, the resist sensor original judgement level is adjusted. After completion of

adjustment, the original judgement level is displayed on the copy quantity display.

Display range: 0 ∼ FFh (hexadecimal)

ADF paper exit reverse sensor adjustment

Used to adjust the ADF paper exit reverse sensor original judgement level.

When this simulation is executed, the paper exit reverse sensor original judgement level is adjusted. After

completion of adjustment, the original judgement level is displayed on the copy quantity display.

Display range: 0 ∼ FFh (hexadecimal)

8 – 19

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Main code

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Content

ADF timing sensor adjustment

When this simulation is executed, the paper exit reverse sensor original judgement level is adjusted. After

completion of this adjustment, the original judgement level is displayed on the copy quantity display.

Display range: 0 ∼ FFh (hexadecimal)

6. User simulation

This simulation allows to change and set the following setting which has been set when shipping from the factory.

(1) Functions which can be set and canceled by the user simulation

Function name

Function and setting content

Factory setting

60 sec

• After completion of copying, when a certain time is passed, the machine returns to the initial state

automatically. The time to return to the initial state is set in the range of 30 - 120 sec in increment of

30 sec. This function can be cleared.

Auto clear

• When the copier is left without copying with the power ON, the power consumption is automatically

lowered to 60Wh. The time to start this function is set in the range of 1 min - 120 min.

• When this function operates, the pre-heat lamp on the operation panel is lighted.

To return to the initial state:

Press any key on the operation panel. (If the COPY button is pressed, the machine returns to the

initial state and performs copying.)

Pre-heat

15 min

30 min

If also the original is set or the tray is pulled out, the machine returns to the initial state.

• When the copier is left without copying with the power ON, the power consumption is automatically

lowered to 10Wh. The time to start this function is set in the range of 5 min - 120 min.

• When this function operates, al the lamps on the operation panel except for the pre-heat lamp are

turned off.

Auto power shut off

Auto pre-heat control

To return to the initial state:

Press the COPY button. The machine returns to the initial state.

• This function learns the use conditions of the copier to automatically control the time to start the

pre-heat function and the auto power shut off function to the optimum level. This function can be

activated or inactivated.

Cancel

• When this function is activated, the time settings in the pre-heat function and the auto power shut off

function are ignored.

• By use of the auto document feeder (option), originals of different sizes are fed manually.

Auto document

feeding unit manual

document feed mode

• When this function is activated, set an original during the original feed lamp blinks after completion

of copying of the previous original, and the original is fed automatically.

• When the sorter (option) is installed, the interval between bins can be extended to facilitate to take

out the copy by pressing the copy take-out key.

Sorter take-out mode

Auto paper selection

Set

• This function automatically selects the copy paper which is of the same size of the original (A3, B4,

A4, B5 size only) which is set on the table.

• When paper is exhausted during copying, if paper of the same size is set in the same direction on

another tray, the tray is automatically selected to allow to copy.

This function can be canceled.

Auto tray selection

Set

* Note: The value of power consumption in pre-heat or in auto power shut off may vary according to the use conditions.

8 – 20

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(2) User simulation

Paper jam/Maintenance/

Mini maintenance/

Paper supply/Toner supply/

Warning LED

Copy

quantity

display

Copy

button

LED

Simulation procedure

State

1. Press the tray selection User simulation input is allowed.

key for 5 sec or more.

Blink

OFF

2. Enter the simulation code Selection of simulation code No.

No. with the10-key pad.

3. Press the COPY button.

Determination of simulation code

4. Enter the selection code Selection of simulation code menu

No. with the 10-key pad.

5. Press the COPY button.

Determination of simulation code menu

OFF

6. Press the tray selection Escape from user simulation.

key.

Returns to

the copy

quantity

display.

• When this key is pressed during selection of user

OFF

Blink

—

simulation, the mode returns to 1 (User simulation is

allowed.).

* Press the clear key.

(Use this key in case of erroneous input)

OFF

• After setting the program, when this key is pressed, the

next program input is allowed.

(

: Blink)

(3) User simulation code table

Sim. Selection code: Factory

Program

code

Set content

setting

code

Set content

setting

Auto clear passing time

setting

[0]: Cancel

[1]: 30 sec

[2]: 60 sec

[3]: 90 sec

[4]: 120 sec

Auto pre-heat control mode

setting and cancel

[0]: Cancel

[1]: Setting

[4]

[1]

Auto document feeder

manual document feed mode

setting

[0]: Cancel

[1]: Setting

[5]

Pre-heat mode setting and

passing time setting

[0]: Cancel

[1]: 1 min

[2]: 15 min

[3]: 60 min

[4]: 120 min

Sorter take-out mode

Auto paper selection

Auto tray selection

[0]: Cancel

[1]: Setting

[7]

[8]

[9]

[2]

[3]

[0]: Cancel

[1]: Setting

[0]: Cancel

[1]: Setting

Auto power shut off mode

setting and passing time

setting

[0]: Cancel

[1]: 5min

[2]: 15 min

[3]: 30 min

[4]: 60 min

[5]: 120 min

(4) Department counter setting content (Set with user program P10 ∼ P15)

Function name

Setting content

Factory setting

P10

P11

Department counter

setting/cancel

The department counter is set or canceled.

Cancel

Department No. registration

The department number is registered. Up to 20 departments can be

registered.

No setting

P12

P13

Department No. change

Department No. delete

The registered department number is changed.

No change allowed.

No delete allowed.

The registered department numbers are deleted.

One department number or all the department numbers can be deleted.

P14

Copy quantity display (Total)

The copy quantity of each department is displayed.

The count is made up to 50,000. After that, the count starts from 0 again.

No display allowed.

P15 Copy quantity delete (Total delete) The counted copy quantity is deleted.

No display allowed. (*)

One department or all the department can be deleted.

(*): Because of no registration of department No. at all.

8 – 21

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[9] SELF DIAGNOSTICS

1. Summary/purpose

This model has the self diag function for the following purposes:

1) When a trouble occurs in the machine, the machine detects the

trouble and displays the trouble content on the copy quantity dis-

play to alert the customer and the serviceman.

2) When any abnormality is detected, the power supply line is cut off

immediately for safety and to protect the machine from damage.

2. Operation

The self diag content is displayed in the following procedure.

A trouble occurs

The abnormalality is detected

by sensors and detectors

The main trouble code is

displayed on the copy

quantity display

YES

Is there

Press the print key

sub code?

The sub trouble code

is displayed on the copy

quantity display

Check the trouble position

(Use the suitable simulation)

Repair

Turn off/on the power or

cancel the self diag with

simulation 14 or 16

3. Clearing the self diag display

After repairing the trouble section, clear the self diag display accord-

ing to the table below:

Clearing the self diag display

Self diag display

Display clearing procedure

L1, L3, L4, L5, L8 Turn off/on the power.

H3, H4

Execute simulation 14.

Execute simulation 16.

When the trouble is cancelled,, the display is

cleared.

CH, PC

9 – 1

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Trouble code

Sub code

Content

Mirror feed trouble

Condition

• When initializing, MHPS is not turned off within 1.5 sec from

starting feeding of the mirror.

• When copying, MHPS is not turned off within 0.5 sec from

starting feeding of the mirror.

• When feeding the mirror is started during copying, the

mirror is not at the home position (MHPS is turned off).

Mirror return trouble

• When initializing, MHPS is not turned on within 2.5 sec from

starting returning of the mirror.

• When copying, MHPS is not turned on within 2 sec from

starting returning of the mirror.

Main motor trouble

Lens trouble

• During rotation of the main motor, MMRE (encoder) pulse is

not sensed for more than 0.5 sec.

• The lens shift operation is not completed within 10 sec from

starting.

• When the lens is moving to the home position (normal

position), LHPS is not sensed even though the lens is

shifted by the specified steps.

Zero cross pulse (FW) trouble

AE sensor trouble

• The zero cross pulse width is shifted more than 10%.

• When the AE sensor characteristics measurement

(simulation 47) is executed, the AE sensor input does not

change.

Fusing thermistor open detection

Fusing high temperature trouble

• The thermistor (TH) input value exceeds 4.07V.

• The fusing temperature is sensed as abnormally high as

240 degrees C (thermistor input value 0.38V or less).

Fusing low temperature trouble

• When warming up, the ready temperature is not reached

within 70 sec.

• When controlling the temperature after completion of warm

up, the fusing temperature (set temperature) is sensed as

–40°C or less.

Backup memory trouble

• The counter addition value and the check sum value are

different from each other.

Backup IC (EEPROM) access error

ADU communication error

• Data read/write to the backup IC (EEPROM) cannot be

performed.

• A communication error occurs between the ADU and the

copier.

(SF-1120 only)

Alignment plate motor trouble

Rear edge plate motor trouble

ADU transport motor trouble

• The initial operation (returning to the home position) of the

alignment plate does not complete within 5 sec.

• The initial operation (returning to the home position) of the

rear edge plate does not complete within 5 sec.

• During rotation of the ADU transport motor, the DMRE

(encoder) pulse is not sensed for more 0.5 sec or more.

• The encoder input remains below a certain level after

500ms with the transport motor PWM at the max. level.

• The encoder input remains above a certain level after

500ms with the transport motor PWM at the min. level.

ADF communication error

• An error occurred in communication of the ADF and the

main unit.

Resist sensor, resist width sensor • When executing the resist sensor and the resist width

adjustment trouble

sensor adjustment (simulation 53-4), the adjustment value

is outside the specified range.

Paper exit/reverse sensor adjustment • When executing the paper exit/reverse sensor adjustment

trouble

(simulation 53-5), the adjustment value is outside the

specified range.

Timing sensor adjustment trouble

Paper feed motor trouble

ADF fan motor

• When the timing sensor adjustment (SIM 53-6) is executed,

the adjustment value is outside the adjustment range.

• During rotation of the paper feed motor, the rotation pulse is

not sensed for 0.1 sec or more.

• The ADF fan motor lock signal is sensed continuously for 2

sec.

9 – 2

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Trouble code

Sub code

Content

Condition

Sorter communication error

• An error occurred in communication between the sorter and

the main unit.

Transport motor trouble

Bin upper limit/lower limit trouble

Bin home sensor trouble

Bin motor trouble

• During rotation of the transport motor, the rotation pulse is

not sensed for 0.5 sec or more.

• When shifting the bins, the upper limit or the lower limit is

erroneously sensed.

• When initializing the bins, the bin home sensor is not

sensed within 1 sec.

• During rotation of the bin motor, the rotation pulse is not

sensed for 0.5 sec or more.

Take-out sensor trouble

Grasping motor trouble

• When the take-out sensor A/D input value is 3V or more.

• During rotation of the grasping motor, the rotation pulse is

not sensed for 0.05 sec.

Image density sensor trouble

• When the light emitting quantity of the image density

sensor is increased to the maximum level, the input value

does not reach 3.75V.

• When the light emitting quantity of the image density

sensor is decreased to the minimum level, the input value

does not fall below 4.5V.

• During execution of the grid voltage correction, the element

level is 3V or lower.

Drum mark sensor trouble

• During one and a quarter rotations of the drum, the drum

mark is not sensed (the sensor input does not become

HIGH).

• The drum mark sensor input level is not in the specified

range.

Grid voltage correction trouble (Limit • When obtaining the grid voltage correction value, the result

over)

of the patch voltage is not in the range of 200 ∼ 650V.

Grid voltage correction trouble

• When obtaining the grid voltage correction value, the patch

voltage is not in the range of 200 ∼ 650V.

• The grid voltage correction cannot be performed properly.

(The correction value cannot be obtained.)

Drum mark sensor gain adjustment • Though the drum mark sensor light emitting quantity is

trouble

increased to 1.45V, the sensor input level does not become

LOW.

Auto developer adjustment under • After completion of the auto developer adjustment

toner detection

(simulation 25-2), the toner density sensor input voltage is

over the specified range. (Under toner)

Auto developer adjustment over • After completion of the auto developer adjustment

toner detection

(simulation 25-2), the toner density sensor input voltage is

under the specified range. (Over toner)

Original detection trouble

• When the original detection sensor judgement level setting

(SIM 41-2) is performed, the difference between the original

presence level and the original empty level is too small.

9 – 3

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[10] SERVICING AT MEMORY TROUBLE AND MAIN CONTROL PWB RE-

PLACEMENT

1. General

2. Purpose

The EEPROM in the control PWB and the EEPROM are storing

various set values, adjustment values, and counter values.

These data are very important and used for operating the machine

properly and for service control.

In the following cases, therefore, various set values, adjustment

values and counter values must be set again.

The purpose is to reset the memory data to operate the machine

properly.

Use the attached service memory data recording sheet to memorize

the newest data when servicing in order to cope with the above

situations. This improves efficiency in servicing and realizes quick

recovery.

* When memory trouble (U2) occurs.

* When the EEPROM in the main control PWB is replaced.

* When the main control PWB is replaced.

3. Remedies

When "U2" trouble occurs, the data cannot be relied upon, and they

must be set properly.

Perform the procedures according to the following flowcharts.

"Sim" in the flowchart means "Simulation."

Memory trouble

Procedures for memory trouble, main control PWB replacement,

and main control PWB EEPROM replacement

"U2" trouble

occurs

Do you replace

the main control

PWB?

Repair the

defective section

YES

Replace the main

control PWB

Cancel "U2" trouble

with simulation 16

Replace the

EEPROM in the

main control PWB

Replace the main

control PWB

Is the

EEPROM in

the main control

PWB defective?

Mount the EEPROM of

the old main control to

the new main control

Replace the EEPROM

YES

End

Replace the main

control PWB

10 – 1

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Is the toner

Use Sim 25-2 to set the

toner density reference value

density reference value

recorded?

Is the adjustment

value of contact pressur

between the main body resist

roller and the copy paper

recorded?

Make a copy and adjust the

contact pressure between

the main body resist roller

and the copy paper

YES

Use Sim 43-01 to set the

fusing temperature

Use Sim 51-02 to set the adjustment

value of contact pressure between

the main body resist roller and the

copy paper

Use Sim 22-07 to set the

developer replacement cycle

counter to the specified value

Use Sim 22-06 to set the

developer counter

*1) For setting, refer to the service

memory data recoding sheet

Are the image

lead edge position

adjustment value and

the resist roller ON

timing adjustment value

recorded?

Make a copy and adjust the

image lead efge position and the

resist roller ON timing

Use Sim 21-01 to set the

maintenance cycle to the

specified value

YES

Use Sim 50-01,50-02 to set the image

lead edge position adjustment value and

the resist roller ON timing adjustment

value

Use Sim 26-06 to set the

desitination specifications

Use Sim 26-13 to set the

operation mode in warm-up

Is the void

amount adjustmant

value recorded?

Make a copy and adjust the

void amount

Is the copy

density adjustment

value recorded?

Make a copy and

adjust the copy

density

YES

Use Sim 47 to set the AE

sensor gain is auto-matically

adj

Use Sim 50-02 to set the void amount

adjustment value

Use Sim 46-01 to set the copy

density adjustment value

Is the vertical

Make a copy and

adjust the vertical

magnification ratio

End

copy magnification

ratio adjustment value

recorded?

YES

Use Sim 48-01 to the

vertical copy magnification

ratio adjustment value

Is the

horizontal copy magnification

ratio adjustment value

recorded?

Make a copy and

adjust the horizontal

copy magnification ratio

YES

Use Sim 48-02 to set the

horizontal copy magnification

ratio adjustment value

10 – 2

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4. Set value recording sheet

Memorize set values in the column of "Set value" for efficient servicing when the memory trouble occurs and the EEPROm is replaced.

Make a copy of this sheet and use with the service sheet.

Contents

Purpose/kind

Section

Main code

Sub code

Set value Description

Adjustment value of contact pressure of the paper on the main

body resist roller

Paper feed section

Copy paper lead edge void amount adjustment

(Resist adjustment A)

Copy paper lead edge void amount adjustment

(Resist adjustment B)

Copy paper lead edge void amount adjustment

(Lead edge void adjustment )

Copy paper lead edge void amount adjustment

(Rear edge void adjustment)

Adjustment value of copy density (exposure level) in each copy

mode and of copy density gradient (exposure gradient)

Manual copy mode density level 1

Adjustment

Manual copy mode density level 5

Optical unit

Manual copy mode density level 1 (Toner save mode)

Manual copy mode density level 5 (Toner save mode)

Auto copy mode density level 1 (Not toner save mode)

Auto copy mode density level 5 (Not toner save mode)

Auto copy mode density level 1 (Toner save mode)

Auto copy mode density level 5 (Toner save mode)

Photo copy mode density level 1 (Not toner save mode)

Photo copy mode density level 5 (Not toner save mode)

The AE sensor and the optical section characteristics memory

data for the change in the copy lamp application voltage

The vertical copy magnification ratio adjustment value

The horizontal copy magnification ratio adjustment value (when

the document table is used)

Developing unit

Specifications

Toner density initial set value

Destination specifications

Setting of the main motor operation mode in warming up

The set value of fusing temperature

Setting of the maintenance cycle

Setting

Fuser unit

Maintenance counter

The developer count of the installed developer unit can be

checked.

Counter

Developing unit

The developer replacement cycle of the installed developer unit

can be checked.

10 – 3

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5. Memory simulation list

Contents

Purpose/kind

Section

Ref. page

Main

code

Sub

code

Default

value

Description

Paper feed

section

Adjustment value of contact pressure of the paper on the main

body resist roller

8-19

8-18

Copy paper lead edge void amount adjustment

(Resist adjustment A)

Copy paper lead edge void amount adjustment

(Resist adjustment B)

Copy paper lead edge void amount adjustment

(Lead edge void adjustment )

Copy paper lead edge void amount adjustment

(Rear edge void adjustment)

Adjustment value of copy density (exposure level) in each copy

mode and of copy density gradient (exposure gradient)

8-17

Manual copy mode density level 1 (Not toner save mode)

Manual copy mode density level 5 (Not toner save mode)

Manual copy mode density level 1 (Toner save mode)

Manual copy mode density level 5 (Toner save mode)

Auto copy mode density level 1 (Not toner save mode)

Auto copy mode density level 5 (Not toner save mode)

Auto copy mode density level 1 (Toner save mode)

Auto copy mode density level 5 (Toner save mode)

Photo copy mode density level 1 (Not toner save mode)

Photo copy mode density level 5 (Not toner save mode)

Adjustment

Optical unit

The AE sensor and the optical section characteristics memory data

for the change in the copy lamp application voltage

8-17

The vertical copy magnification ratio adjustment value

8-17

8-18

The horizontal copy magnification ratio adjustment value (when the

document table is used)

Developer unit

Specifications

Toner density initial set value

8-9

Setting

Specifications setting by destination

8-10

Code No.

Destination

Japan

U.S.A.

Canada

Europe except U.K.

U.K.

Australia

Inch series outside Japan

AB series outside Japan

Fuser unit

Setting of the main motor operation mode in warming up.

8-10

Code

No.

Operation

mode

Operation

Normal

mode

When the fusing temperature reaches

the specified level, the main motor stops.

Long

mode

The main motor keeps rotating until the

completion of the warming up.

185°C Fusing temperature set value

Maintenance cycle setting

8-13

8-8

Maintenance

counter

Mini maintenance cycle setting

Developer unit

Used to confirm the developer counter value of the installed

developer unit.

Used to confirm the developer replacement cycle of the installed

developer unit.

8-8

10 – 4

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[11] MAINTENANCE

1. Maintenance cycle and maintenance items

Maintenance of the SF-1020/1120 should be performed at every 50K.

<Content> ★ = Lubricate, F = Clean, v = Adjust, b = Replace/attach, ê = Shift position

✕ = Check (Clean, replace, or adjust if necessary.)

* The toner consumption and the waste toner bottle replacement cycle are those when the reference chart is used.

Section

Developing

Parts

50K

100K

150K

200K

Same cycle later

Remark

Developer

DV blade

DV side seal (F/R)

Drum

Cleaner blade

Toner reception seal

Drum separation seal

Charging plate (saw teeth)

MC case

Process peripheral

Screen grid

Discharge lamp

Blank lamp

Drum mark sensor

Drum density sensor

Waste toner bottle

TC/SC case

TC/SC wire

Suction

Suction belt

Ozone filter

Upper heat roller

Lower heat roller

Upper separation pawl

Lower separation pawl

Thermistor

Fusing

Optical

Heat roller gear

Mirror/lens/reflector

Drive wire/pulley

Rails

★

Table glass

Dust-proof glass

Pick-up roller

F (✕)

Paper feed

Paper feed roller

(including multi paper

feed section)

Do not use alcohol.

Wipe with water.

Separation roller

F (✕)

Torque limiter section

PC roller pair

Transport roller pair

Transport paper guides

Transport system sensors

Belts

Transport

Drive

Gears

(specified gears only)

★

Image

11 – 1

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[12] ELECTRICAL SECTION

1. System block diagram

12 – 1

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System operation when the power is turned on:

Power ON

Initial setting

Memory transfer

Trouble

JAM

Warm up

Heater lampp ON

Mirror initial operation

Lens initial operation

End of

warm up

Racing

Process contorol

Toner density control

End of racing

RPL ON

PSW ON

RPL OFF

Copy cycle

End of copying

12 – 2

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BL-DATA

VREF

BL-DATA

VREF

/ C S

E S R / E T

- D 0 D

2 A - A 0

R X

PROCON

MCS

PDA

MCS

PCG MCG

AES

AEG0, AEG1

MMPWM

DATA0

RTH

FWS, RTH

12 – 3

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(2) CPU (IC6) SC3041K12F

1 General

The CPU controls the loads of the main body and controls the system

in synchronization with data transmission and reception through the

optional controllers and serial data communication line.

2 Features

The SC3041K12F is a high performance single-chip micro computer

which is integrated with the necessary peripheral devices as well as

the main core of 32-bit H8/300H CPU.

The 32-bit H8/300H CPU is of internal 32-bit composition, and is

provided with simple and optimum commands designed for high

speed operations with 16 bit x 16 general-purpose registers. It hand-

les 16MB linear address space.

As the peripheral devices, included are the ROM, the RAM, the 16-bit

integrated timer unit (ITU), the programmable timing pattern controller

(TPC), the watch dog timer (WDT), the serial communication interface

(SCI), the A/D convertor, the D/A convertor, the I/O port, the MDA

controller (DMAC), and the refresh controller.

3 Pin arrangement

A Vcc

Vref

A13/P25

A12/P24

A11/P23

A10/P22

A9/P21

A8/P20

Vss

P70/AN0

P71/AN1

P72/AN2

P73/AN3

P74/AN4

A7/P17

A6/P16

A5/P15

A4/P14

A3/P13

A2/P12

A1/P11

A0/P10

Vcc

P75/AN5

P76/AN6/DA0

P77/AN7/DA1

A Vss

P80/RFSH/IRQ0

P81/CS3/RAS/IRQ1

P82/CS2/IRQ2

SC3041K12F

P83/CS1/IRQ3

P84/CS0

100

Vss

D15/P37

D14/P36

D13/P35

D12/P34

D11/P33

D10/P32

D9/P31

D8/P30

D7/P47

JAPAN

PA0/TP0/TEND0/TCLKA

PA1/TP1/TEND1/TCLKB

PA2/TP2/TIOCA0/TCLKC

PA3/TP3/TIOCB0/TCLKD

PA4/TP4/TIOCA1/A23

PA5/TP5/TIOCB1/A22

PA6/TP6/TIOCA2/A21

PA7/TP7/TIOCB2/A20

12 – 4

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4 Internal block diagram

Port 3

Port 4

Address bus

Address bus (Upper)

Address bus (Lower)

MD2

MD1

MD0

EXTAL

XTAL

PS3/A19

PS2/A18

PS1/A17

PS0/A16

HS/300H CPU

STBY

RES

RES0

NMI

P27/A15

P26/A14

P25/A13

P24/A12

P23/A11

P22/A10

P21/A9

Interruption

controller

P66/LWR

P65/HWR

P64/RD

DMA

contorller

(DMAC)

P63/AS

ROM*

(Mask ROM)

P62/BACK

P61/BREQ

P60/WAIT

P20/A8

Refresh

controller

P17/A7

P16/A6

P15/A5

P14/A4

P13/A3

P12/A2

P11/A1

P10/A0

RAM

Watchdog timer

P84/CS0

P83/CS1/IRQ3

P82/CS2/IRQ2

P81/CS3/IRQ1

P80/RFSH/IRQ0

16-bit integrated

timer pulse unit

(ITU)

serial communication

interface

(SCI) x 2ch

Programmable

timing pattern

controller (TPC)

A/D convertor

D/A convertor

P95/SCK1/IRQ5

P94/SCK0/IRQ4

P93/RXD1

P92/RXD0

P91/TXD1

P90/TXD0

Port B

Port A

Port 7

*ROM capacity

H8/3042 64KByte

H8/3041 48KByte

H8/3040 32KByte

12 – 5

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5 CPU SC3041K12F (IC1) pin signal

Pin No.

Port

VCC

P60

PB1

PB2

PB3

PB4

PB5

PB6

PB7

/RES0

VSS

P90

P91

P92

P93

P94

P95

P40

P41

P42

P43

VSS

P44

P45

P46

P47

P30

P31

P32

P33

P34

P35

P36

P37

VCC

P10

P11

P12

P13

P14

P15

P16

P17

VSS

P20

P21

P22

P23

P24

P25

P26

Signal name IN/OUT

VCC

H/L

Specifications

Power (+5V)

CVFMPWM

SCL

MMPWM

SDA

/MIR-A

MIR-A

/MIR-B

MIR-B

/RES0

VSS

DATA

TXD

OUT

Fan motor (PWM output) signal

Serial clock signal for EEPROM

Main motor (PWM output) signal

Serial data for EEPROM

Mirror base motor drive signal -A

Mirror base motor drive signal A

Mirror base motor drive signal -B

Mirror base motor drive signal B

Reset signal for external device (fixed to HIGH)

Power (GND)

OUT

Operation panel serial data signal

Option UART input signal

Heater lamp control signal (ON at LOW)

Option UART input signal

Operation panel serial clock input signal

Operation panel data latch signal

Key input 0 signal

RXD

OP-CLK

OP-LATCH

KI0

OUT

KI1

Key input 1 signal

KI2

Key input 2 signal

KI3

Key input 3 signal

VSS

Power (GND)

Matrix input 0 signal

Matrix input 1 signal

Matrix input 2 signal

MFD

Multi manual feed unit sensing signal (Low when the unit is sensed.)

Data signal

VCC

Address signal

Power (+5V2)

Address signal

VSS

A10

A11

A12

A13

A14

12 – 6

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Pin No.

100

Port

P27

Signal name IN/OUT

H/L

Specifications

A15

A16

Address signal

P50

P51

LHPS

PPD

Lens home position signal (LOW at 100%)

Transport pass sensor signal (HIGH when paper is sensed.)

Drum marking sensor signal

P52

P53

MCS

VSS

P60

VSS

Power (GND)

DATA0

DATA1

DATA2

S-CLK

/STBY

/RESET

NMI

Matrix input 0 (LSI51)

P61

Matrix input 1 (LSI51)

P62

Matrix input 2 (LSI51)

S-CLK

/STBY

/RES

NMI

VSS

EXTAL

XTEL

VCC

P63

OUT

System clock (Fixed to HIGH)

Standby signal (Fixed to HIGH)

Reset at LOW.

Non-maskable interruption (Fixed to LOW.)

Power (GND)

VSS

EXTAL

XTEL

VCC

Clock (8MHz)

Power (+5V2)

/AS

OUT

Address strobe signal (Fixed to HIGH.)

ROM. I/O data read signal

P64

/RD

P65

/HWR

/LWR

MD0

I/O data write signal

P66

Lower write signal (Fixed to HIGH.)

Mode set signal (Fixed to HIGH.)

Mode set signal (Fixed to LOW.)

Mode set signal (Fixed to HIGH.)

A/D, D/A convertor power

MD0

MD1

MD2

AVCC

VREF

P70

MD1

MD2

AVCC

VREF

AES

A/D, D/A convertor reference voltage

AE sensor signal (Analog input signal)

Thermistor signal (Analog input signal)

Toner density sensor signal (Analog input signal)

Process control signal (Analog input signal)

Developing unit color detection signal (Analog input signal)

Original sensor signal (Analog input signal)

Blank lamp data signal (Analog input signal)

Process control gain signal

P71

P72

TCS

P73

PROCON

DVC

P74

P75

P76

BLDATA

PCG

OUT

P77

AVSS

P80

GND

MHPS

FWS

Mirror home position sensor signal

P81

Zero cross detection signal

P82

/CS2

OUT

Chip select signal (I/O) (I/O is selected at LOW.)

Chip select signal (EPROM) (EPROM is selected at LOW.)

Waste toner sensor signal (Toner full at HIGH)

Power (GND)

P83

/CS1

P84

TFD

VSS

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

GND

LED0

LED1

CLPWM

MMRE

GBPWM

PFMCLK

TM0

OUT

Original detection LED lighting signal 0 (ON at HIGH)

Original detection LED lighting signal 1 (ON at HIGH)

Copy lamp control signal (PWM signal)

Main motor rotary encoder detection signal

Grid bias control signal (PWM signal)

OUT

Paper feed motor clock signal

Toner supply motor drive signal 0 (ON at HIGH)

Toner supply motor drive signal 1 (ON at HIGH)

TM1

12 – 7

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(3) I/O (IC8) CXD1095Q

3 Pin arrangement

1 General

I/O converts data (command) from the CPU into control signals.

The CXD1095Q is a general-purpose interface element, and has 4.5

sets of 8-bit I/O ports to allow setting of input and output operations of

parallel data by the program or the hardware.

SONY

JAPAN

2 Features

8-bit parallel I/O port x 4.5 ports

CXD1095Q

No.

Pin name

I/O

Pin name

I/O

Pin name

I/O

Pin name

I/O

No.

N.C

PB1

PB2

PB3

PB4

PB5

PB6

PB7

Vss

—

PC6

PC7

N.C

PD0

PD1

PD2

PD3

PD4

Vss

VDD

PD5

PD6

PD7

I/O

—

N.C

—

I/O

PE0

PE1

N.C

PE2

PE3

PA0

PA1

PA2

Vss

I/O

—

I/O

—

I/O

—

I/O

—

CLR

ODEN

Vss

—

VDD

PA3

PA4

PA5

PA6

PA7

PB0

—

PC0

PC1

PC2

PC3

PC4

PC5

I/O

12 – 8

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4 Internal block diagram

DATA

LATCH

CLR

DATA

SELECT

CONTROL

ODEN

5 I/O: CXD1095Q (IC8) pin signal

Signal

name

Pin No.

Port

IN/OUT

H/L

Specifications

PB1

PB2

PB3

PB4

PB5

PB6

PB7

VSS

PC0

DTR

SRES

OUT

Option receive allow signal

Option reset signal

Total counter control signal

Transport clutch control signal

TRC

RRC

Resist roller clutch control signal

Power relay control signal

Developing bias control signal

Power (GND)

DVBIAS

VSS

THV/MHV

OUT

Transfer/main charger control signal

12 – 9

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Signal

name

Pin No.

Port

IN/OUT

H/L

Specifications

Tray 1 paper feed clutch control signal

PC1

PC2

PC3

PC4

PC5

PC6

PC7

CPFC1

CPEC2

CPFC3

CPFC4

CS2M

OUT

Tray 2 paper feed clutch control signal

Tray 3 paper feed clutch control signal

Tray 4 paper feed clutch control signal

Tray 2 motor control signal

CS3M

Tray 3 motor control signal

CS4M

Tray 4 motor control signal

PD0

PD1

PD2

PD3

PD4

VSS

VDD

PD5

PD6

PD7

SELA

SELB

SELC

SHV

OUT

Matrix input select A signal

Matrix input select B signal

Matrix input select C signal

Separation charger control signal

Discharge lamp control signal

Power (GND)

VSS

VDD

Power (+5V2)

AEG0

AEG1

OUT

AE sensor gain 0 control signal

AE sensor gain 1 control signal

Data signal

/CLR

/ODEN

VSS

/WR

/RD

/CS

/RESET

VSS

/WR

/RD

Reset at LOW (0V).

Power (GND)

Data write signal

Data read signal

Chip select signal

Address signal

Lens motor drive signal A

Lens motor drive signal -A

/CS1

PE0

PE1

LM-A

/LM-A

OUT

PE2

PE3

PA0

PA1

PA2

VSS

VDD

PA3

PA4

PA5

PA6

PA7

PB0

LM-B

/LM-B

MPFC

PSPS

SFM

OUT

Lens motor drive signal B

Lens motor drive signal -B

Multi paper feed clutch control signal

Separation solenoid control signal

Suction fan motor control signal

Power (GND)

VSS

VDD

Power (GND)

P-DOWN

DC-OFF

OUT

Mirror motor current limit gain signal

DC24V ON/OFF signal (ON at HIGH)

SEL

OUT

Option communication select signal (Sorter at HIGH)

12 – 10

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(4) Detector circuit of sensor signal

+5V

SEL B

The LS151 selects one signal of D0 ∼ D7 according to the combina-

tion of SEL A ∼ C signals (H, L) and outputs it to Y.

Selection of D0 ∼ D7 for SEL A ∼ C is made as shown in the table

below.

+5V

CSD1

I/O

SW602

HC04

24K

SEL C

SEL B

SEL A

+5V

4.7K

+5V

4.7K

10K

22K

2.2K

IC15

DTA123YS

POD

GP1S53

CPU

MAIN LS151

TMOTOR2 LS151

TMOTOR3 LS151

+5V

SEL C

+5V

4.7K

I/O

SEL A

SEL B

SEL C

HC04

10K

24K

22K

2.2K

DTA123YS

+5V

PPD1

GP1S53

74LS151

4.7K

HC04

PNC

24K

The sensor signal is in the following composition with the matrix of

SEL A ∼ C and S0 ∼ 2.

+5V

—

CSD

SEL A

SEL B

SEL C

PED1

SW ^A

CSD 0

CSD 1

CSD 2

HC04

⁄

POD

PNC

24K

PPD1

+5V

SEL A

+5V

(5) Start/stop control circuit

4.7K

This circuit detects ON/OFF of the power and controls start/stop of

the circuits.

I/O

HC04

10K

24K

The DC power section provides each power voltage (VH=+32V,

+24V, VC=+1-V, VD1=5V, VD2=5V).

22K

2.2K

DTA123YS

+5V

When the power voltage reaches the specified level, the operation of

each circuit is started. Before the paper voltage falls below the

specified level, the operation of each circuit is stopped to prevent

against malfunctions.

PE1

EE-SX1042

CSD0

SW601

5V2

HC04

24K

RESET

CPU

(IC 6)

5V2

MOTOR PWB 2 LS151

MOTOR PWB 3 LS151

2.7KJ

IC13

VCC

CAP

/RESET

GND

C42

22000PF

M51953BL

1µ F

10V

470µ F

10V

12 – 11

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(6) Heater lamp control circuit

+5V1

R67

1KJ

R71

47KJ

R75

75J

2SC945

IC20D

NJM2901

R80

OP-LATCH

CPU 17PIN

R68

5.6KJ

24KJ

R84

10KJ

0.22µ F

D41

0.22µ F

Vref

R91

8.2KJ

R87

1MJ

R89

4.7KF

D38

IC20C

NJM2901

MA700

C55

22000PF

D16

R93

680J

R92

47KF

DSM101

8 ~ 20

2SA573

R54

R53

+24V

IC9

5.6KJ

47KJ

Heat roller

R32

2.7KJ

CPU

AN1

ULN2004

R35

+5V2

270J

1/4W

10K

2.2K

DTA123Y5

GATE

GND

AC PWB

200V AREA

MLSW

ML : 1KW

[High temperature protect circuit when the CPU is hung up (out

of control)]

1 General

The heater lamp control circuit detects the heat roller surface

temperature with the thermistor, converts it into a voltage, and out-

puts it to the CPu analog input pin.

The CPU converts analog signals into digital signals, compares them

with the value set by test commands to turn on/off the heater lamp,

maintaining the heat roller surface temperature at a constant level.

The higher the heat roller surface temperature is, the greater the

thermistor resistance is, and vice versa.

Therefore, the lower the heat roller surface temperature is, the higher

the thermistor pin voltage is. The thermistor pin voltage is inputted to

the analog port of CPU, which controls ON/OFF of the heater lamp

according to the input voltage level.

1) The IC20 8 pin voltage (reference voltage) is divided by R91 and

R93. The thermistor pin voltage is inputted to the IC20 9 pin.

When the voltage at 9 pin becomes lower than the voltage at 8 pin

(the heat roller surface temperature about 240V), the IC20 14 pin

is driven to LOW, pulling down the PR signal to the GND level,

turning off the AC power of the heater lamp.

2) Since the OP-latch signal is fixed to HIGH or LOW, the collector of

Q7 is open. The voltage at IC20 10 pin is higher than the voltage

at IC20 11 pin (reference voltage), and IC20 13 pin is driven to

LOW.

With the above operations, IC9 13 pin is opened to turn off Q5,

turning off the power relay. As a result, the AC power of the heater

and the copy lamp is turned off.

* The double protection with 1) and 2) is provided.

12 – 12

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[When the heat roller surface temperature is lower than the set

temperature]

(8) Stepping motor drive circuit

1 General

a. Since the thermistor pin voltage is higher then the set level, the

output signal HL from the CPU is driven to LOW.

The driver circuit drives the lens drive motor, the mirror base drive

motor, the automatic duplex copy tray, the side plate motor, and the

rear plate motor.

b. This HL signal is passed through TR Q3 to the solid state relay

(SSR).

When, therefore, the HL signal is LOW, the internal triac turns on.

c. When the internal triac turns on, a pulse is applied to the gate of

external triac to flow a current from the power through the heater

lamp to the triac, lighting the heater lamp.

Phase A

+24V

[When the heat roller surface temperature is higher than the set

level]

Phase A

Phase B Phase B

a. Since the thermistor pin voltage is lower than the set level, the

output signal HL from the CPU is driven to HIGH.

b. HL is driven to LOW, SSR turns off, the external triac turns off,

and the heater lamp turns off.

[Q3]

+24V

Prevents the hater lamp from being lighted always by the trouble in

the heater lamp drive signal harness wiring.

A: Stepping motor phase A coil drive signal

B: Stepping motor phase B coil drive signal

A: Stepping motor phase A coil drive signal

B: Stepping motor phase B coil drive signal

(7) Driver circuit (Solenoid, electromagnetic clutch)

1 General

* Mirror base motor power is Vh.

The control signals of each load outputted from the CPU and I/O

cannot drive the load directly. The output, therefore, is delivered to

the load through the driver IC.

Stepping motor time chart

2 Operation

The drive circuit forms a Darlington circuit with two transistors to

obtain a large drive current (load current) from a small input current

(I/O output current). When the driver input voltage is HIGh (+5V), the

transistor is turned on to flow a current in the arrow direction, operat-

ing the load. When the driver is turned on, the driver output pin

voltage is 0V.

+24V

I/O

output

LOAD

12 – 13

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(9) AE (Auto Exposure) sensor circuit

The AE sensor circuit is composed of the AE sensor PWB; which is composed of the photo diode, the I-V convertor circuit, and the amplifier circuit;

and the amplifier circuit on the control PWB.

+24V

R50

C48

100KJ

0.1µ F

R53

1KJ

CPU

I/O

R40

1KJ

AES

AN0

PDK

PDA

IC14A

LM324

C38

ZD2

HZS883

IC14B

1000PF

LM324

R48

100KJ

C49

2200PF

R44

R43

R45

R47

270F

AEG1

AEG0

AE sensor PWB

15KF

750F

75F

AEG1

AEG0

Operation amplifier A performs I-V conversion of the original density level (minute current) from the sensor. Operation amplifiers B and C amplify the

output of operation amplifier A to a suitable level for inputting to the CPU.

The amplifying level is automatically set by selecting the AE gain signal (AEG0 ∼ AEG2) outputted from the I/O chip when test command SIM 47 is

executed.

AE operation is performed by the software in the control PWB. When a reflected ray enters the sensor, a voltage corresponding to the light quantity

is inputted to the CPU. The CPU compares the input voltage and the copy lamp application voltage and controls the copy lamp voltage so that the

exposure level corresponds to the original density.

(10) Toner supply motor drive circuit

IC104 is the motor control IC which drives the toner supply motor with

the pulse signals (TMa, TMb) outputted from the I/O chip.

Truth value table

Input

Output

Mode

+24V

TMa

TMb

TMa

∞

TMb

∞

Stop

IC5

+5V

CW/CCW

CCW/CW

Break

TMa

TMb

10UF35V

IN1

TMa

TMb

IN2

I/O

GND

R20

R211

TA7291S

47KJ 47KJ

∞: High impedance

Internal circuit

+5V

+24V

(11) Reset IC (IC13)

+24V

1 General

The M51953 BL is the semiconductor IC most suitable to detect the

power voltage and reset the logic circuit of every type including the

CPU.

It is provided with the built-in delay circuit. Delay time is easily ob-

tained by adding external capacity.

TMa

REG

Protection

circuit

Pin connections (Top view)

TMb

(Heat insulated)

Output

Delay capacity

GND

pin = NC pin

TMa

TMb

Power

External view 5P5

12 – 14

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2 Operation

• When "td" (= 30msec) passes after the voltage reaches 4.25V by

turning on the power, the output is drive to HIGH.

"td" is set by the external capacitor (C106).

Block diagram

Power

5µA

reference

Output

1.25V

GND

Delay capacity

4.25V

0.65V

Output not constant

ta = 30m sec

(12) Operation panel

1 General

• The operation circuit is composed of the key matrix circuit and the

display matrix circuit.

Key detection: With the signal detected by Q1 ∼ Q7 and KI0 ∼ KI3

signal matrix at LOW (GND) and Q2 ∼ Q7 at HIGH (open), the

level of KI 0 ∼ KI3 is checked to judge whether key matrix 1, 2, and

3 are HIGH or LOW, judging on/off.

For Q2 ∼ Q7, switching is made every 2msec to judge each of

them.

+5V2

+5V1

KI0

KI1

KI2

TD62504

CPU

M66313

12 – 15

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(13) EnergyStar circuit description

The EnergyStar circuit composition saves power consumption when

the user leaves the machine with the power ON.

Normally in a copy mode or in the standby mode, the main PWB

connector HL signal is HIGH (5V) and the AC PWB relay (TY201) is

turned on to supply power to all the power transformers and the

optional power source.

When the machine is left un-operated with the power ON, the main

PWB connector HL signal level becomes a high impedance to turn off

the AC PWV relay (RY201), stopping power supply to the power

transformers and the optional power source except for the sub DC

PWB PT2 (Ref. t1). As a result, only 5V is supplied to the main PWB

and the operation PWB to reduce the power consumption.

To reset from this energy save mode, press an button on the opera-

tion PWB.

HOUND AC CIRCUIT

OPTION

RY201

AC PWB

DC PWB

SORTER

5V2

GND

OEG

OMH-SS-

105LM

AC PWB

DC PWB

+5V1

“d

ILSW

AC PWB

Vcl

+5V1

AC IN

+24V

M A I N

P W B

N/F

MirM

VFM

SFM

CFM LM

PT1

JQ1-24V

(AJQ1342)

JAPAN ONLY

PWB

+24V

+5V

GND

ADF

CONTROL

ADF

DCPS

DHSW

DSW

MOTOR

CONTROL

24V

HOUND-B ONLY

OPTION

ADF OPTION PWB

CS2M

SUB

DC PWB

PWB

MOTOR

CONTROL

PWB

+28V

CS3M

CS4M

PT2

OPTION

DH3

DH4

MOTOR

CONTROL

PWB

OPTION

DESK DC

POWER

PWB

DESK MOTOR DRIVE PWB

DH5

DC PWB

+5V1

DH1

DH2

OP PWB

D304

PT3

+5V2

GND

ADUD

SF-2120/1120

only

GATE

CLR

200V ONLY

+24V

HL TRG

AC PWB

+5V

+24V

GND

AC PWB

200V

ADU PWB

CIRCUIT

120V

THSW

200V

SUB DC PWB (MAIN,OP)

AREA

PT1

CLTF

THSW

ADF DCPS

CL:100V 275W

200V 310W

CLTF

HL:1kW

12 – 16

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(14) ADU circuit description

(1) ADU circuit block diagram

12 – 17

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(2) ADU CPU (IC1)

1. Outline

The CPU controls the loads of the ADU unit and performs data trans-

mission through the copier main PWB and the serial data line to make

synchronization with data transmission to control the ADU unit.

2. Feature

The H8/3297 series is a single chip microcomputer which integrates

the H8/300CPU and the peripheral devices.

3. Internal block diagram

FIg. 1.1 shows the internal block diagram of the LSI.

Fig. 1.1 Internal block diagram

CPU

H8/300

Data bus (Lower)

P40/IRQ2/ADTRG

P41/IRQ1

P42/IRQ0

P43/RD

P10/A0

P11/A1

P12/A2

P13/A3

P14/A4

P15/A5

P16/A6

P17/A7

RAM

ROM

P44/WR

P45/AS

P46/

Watch-dog

timer

P47/WAIT

Serial

communication

interface

P30/D0

P31/D1

P32/D2

P33/D3

P34/D4

P35/D5

P36/D6

P37/D7

P20/A8

P21/A9

16-bit free

running timer

P22/A10

P23/A11

P24/A12

P25/A13

P26/A14

P27/A15

10-bit A/D

convertor

x 8ch

8-bit timer

x 2ch

Port 6

Port 7

Port 5

12 – 18

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4. Pin arrangement (FP-64A: Top view)

P50/TXD

P51/RXD

P52/SCK

RES

P10/A0

P11/A1

P12/A2

P13/A3

P14/A4

P15/A5

P16/A6

P17/A7

VSS

NMI

VCC

STBY

VSS

FP-64A

XTAL

EXTAL

MD1

P20/A8

P21/A9

P22/A10

P23/A11

P24/A12

P25/A13

P26/A14

MD0

AVSS

P70/AN0

P71/AN1

P72/AN2

5. ADU PWB Port List

Pin Used

No. Port

Sig. Name I/O Active

No. Port

Note

Sig. Name I/O Active

Note

P5-0

P5-1

P5-2

/RES

/NMI

TXD

RXD

DSR

Copier UART signal

External reset pin

20 P7-6

21 P7-7

22 AVCC

23 P6-0

24 P6-1

25 P6-2

26 P6-3

27 P6-4

28 P6-5

29 P6-6

30 P6-7

31 VCC

32 A15

33 A14

34 A13

35 A12

36 A11

37 A10

38 A9

DTR

Copier UART signal

—

A/D power (GND)

Stepping motor output signal

SPM-ONT

—

Non-maskable pin

(H-lev. fixed)

DPTD

—

DDM rotary encoder signal

VCC

Power (VD)

/STBY

VSS

Standby pin (H-lev. fixed)

Power (GND)

DDM_PWM

DDM_DIR

—

DDM drive pulse signal

H/L DDM direction select signal

XTAL

Clock pin (8MHa)

Clock pin (8MHz)

CPU mode select pin

A/D power (VD)

10 EXTAL

11 MD1

12 MD2

13 AVSS

14 P7-0

SIM

Not Used

Power (VD)

Address signal

Power (VD)

DPHPS1

DPHPS2

Alignment plate home

position sensor signal

15 P7-1

Alignment plate home

position sensor signal

16 P7-2

17 P7-3

18 P7-4

19 P7-5

DPED1

DPPD1

DPED2

DPOD

Paper sensor 1

Paper entry sensor

Paper sensor 2

Paper exit sensor

39 A8

40 VSS

41 A7

Address signal

12 – 19

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Pin Used

No. Port

Sig. Name I/O Active

Note

Address signal

Stepping motor time chart

42 A6

43 A5

44 A4

45 A3

46 A2

47 A1

48 A0

49 D0

50 D1

51 D2

52 D3

53 D4

54 D5

55 D6

56 D7

57 P4-0

58 P4-1

59 P4-2

60 /RD

61 /WR

Address signal

Data signal

Phase A

+24V

Data signal

Phase A

Data signal

Phase B Phase B

Data signal

DPFC

DRRC

Take-up roller clutch signal

Transport roller clutch signal

Not Used

—

+24V

ROM READ pin

A: Stepping motor phase A coil drive circuit

B: Stepping motor phase B coil drive circuit

A: Stepping motor phase A coil drive circuit

B: Stepping motor phase B coil drive circuit

Stepping motor data

WRITE pin

62 /AS

Address strobe pin

(H-lev. fixed)

(4) ADU motor (DDM) drive circuit

The CPU supplies signals of two systems, which are process by the

hardware to drive DDM.

63 /CLK

64 /WAIT

System clock pin

(H-lev. fixed)

Wait pin (H-lev. fixed)

Drive and non-drive speed control is performed with DDM_PWM, and

normal/reverse rotation of the motor is performed with DDM_DIR.

When paper enters the ADU, DDM is driven with DDM_DIR at LOW,

Q3 ON, and Q1 OFF.

When paper enters the ADU, DDM is driven with DDM_DIR at LOW,

Q3 is turned ON and Q1 is turned OFF.

(3) Stepping motor (PAM1, PAM2) drive circuit

The write data is latched by the HC374 at the writing timing of exter-

nal address. When the stepping motor output signal (P6-0) becomes

LOW, the excitement signal of the stepping motor is sent to the

transistor array IC of IC2, 3, driving PAM1 and PAM2.

When DDM_PWM is HIGH, Q2 is turned OFF and Q4 is turned ON

by Q3.

Write address

H’FF80

Data bus

Drive signal

PAM1 A

PAM1/A

PAM1 B

PAM1/B

PAM2 A

PAM2/A

PAM2 B

PAM2/B

ACT

In IC8, therefore, A-OFF, B-ON, D-OFF. The motor current flows

through VH → B → M → C → GND to drive the motor.

The motor rotation is controlled with the PWM control.

When paper is discharged from the ADU, DDM_DIR is HIGH, Q3 is

turned OFF and Q1 is turned ON.

When DDM_PWM is HIGH, Q4 is turned OFF and Q2 is turned ON

by Q1.

In IC8, therefore, A-ON, B-OFF, C-OFF, D-ON. The motor current

flows through VH → A → M → GND to drive the motor.

The motor rotation is controlled with the PWM control.

When the motor is not driven, DDM_PWM and DDM_DIR are LOW.

* The power source is driven by VB.

12 – 20

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IC2

COM

SPM2 A

SPM2-A

SPM2 B

SPM2-B

PAM1

PAM1 /A

PAM1

PAM1 /B

CNB-13

CNB-11

CNB-9

CNB-7

GND

D15

R20

10KJ

1/4W

uLN2003A

R17

24KJ

R18

1SS133

2SC1740S

R21

2SC1740S

2.7KJ

R19

10KJ

R22

10KJ

D16

2SC1740S

R27

R30

1SS133

2.7KJ

24KJ

R31

10KJ

R28

2SC1740S

2.7KJ

R29

10KJ

6.2KJ

1/2Wx2

125V 1.6A

250V T1.6A

IC8

SLA4391

R23

2KJ

R25

2KJ

VCC

SIG1

SIG2

SIG3

SIG4

D18

RK14

D20

RK14

8.2KJ 1/2W

R24

OUT1 11

CNB-17

OUT2

OUT3

OUT4

2KJ

R26

C29

10000pF

CNB-15

D19

RK14

2KJ

D17

RK14

VDD

8.2KJ 1/2W

R14

10KJ

0.22J/1W

R15

30KF

IC7A

C27

22000pF

R13

C26

10000pF

10KJ

R16

1.5KF

DDM_DIR

LM393F

DDM_PWM

10uF/35V

IC8 (SLA4391) internal diagram

R3 R4

R1 R2

GND

12 – 21

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