General Precautions for Installation/Servicing/Maintenance for the MD-0101
The installation and service should be done by a qualified service technician.
1. When installing the MD-0101 to the Plain Paper Copier, be sure to follow the instructions described in
the “Unpacking/Set-Up Procedure for the MD-0101” booklet which comes with each unit of the
MD-0101.
2. The MD-0101 should be installed by an authorized/qualified person.
3. Before starting installation, servicing or maintenance work, be sure to turn off and unplug the copier
first.
4. When servcing or maintaining the MD-0101, be careful about the rotating or operation sections such
as gear, pulleys, sprockets, cams, belts, etc.
5. When parts are disassembled, reassembly is basically the reverse of disassembly unless otherwise
noted in this manual or other related materials. Be careful not to reassemble small parts such as
screws, washers, pins, E-rings, toothed washers to the wrong places.
6. Basically, the machine should not be operated with any parts removed or disassembled.
7. Delicate parts for preventing safety hazard problems (such as breakers, thermofuses, fuses, door
switches, sensors, etc. if any) should be handled/installed/adjusted correctly.
8. Use suitable measuring instruments and tools.
9. During servicing or maintenance work, be sure to check the serial No. plate and other cautionary
labels (if any) to see if they are clean and firmly fixed. If not, take appropriate actions.
10. The PC board must be stored in an anti-electrostatic bag and handled carefully using a wristband,
because the ICs on it may be damaged due to static electricity. Before using the wrist band, pull out
the power cord plug of the copier and make sure that there is no uninsulated charged objects in the
vicinity.
11. For the recovery and disposal of used MD-0101, consumable parts and packing materials, it is
recommended that the relevant local regulations/rules should be followed.
12. After completing installation, servicing and maintenance of the MD-0101, return the MD-0101 to its
original state, and check operation.
Copyright 2000
TOSHIBA TEC CORPORATION
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1. SPECIFICATIONS
Function
: Stackless unit for duplex printing
Paper
: Size A3 to A5-R/LD to ST-R
: Thickness Normal paper 64 to 80g/m2 (17 to 21 lbs)
Transport speed
: 92 mm/sec. (DP1600 series)
: 124 mm/sec. (DP2000/2500 series)
Dimensions
Weight
: 101 (W) x 488 (D) x 345 (H) mm
: Approx. 4.3 kg
Power supply
: 5VDC, 24VDC (Supplied from copier)
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MD-0101 SPECIFICATION
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2. OUTLINE
2.1 Names of Various Components
Release lever
ADU 02-01-01
ADU paper guide assembly
ADU release hook F
Connection cable
ADU release hook R
ADU 02-01-02
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MD-0101 OUTLINE
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2.2 Layout of Electrical Parts
SW1
SEN2
M2
SEN1
ADU (PWA-F-ADU)
M1
ADU 02-02-01
Symbols and functions of various devices
Symbol
SEN1
Name
Function
FED1-SEN
Detects the transport of paper (Lower).
ADU paper jam sensor (Lower)
FED2-SEN
SEN2
SW1
M1
Detects the transport of paper (Upper).
ADU paper jam sensor (Upper)
ADUCOV-SW
Detection of cover open/close status during jam
processing, etc.
ADU cover open switch
FED1-MOT
Drives the roller to transport paper (Lower).
ADU motor (Lower)
FED2-MOT
M2
Drives the roller to transport paper (Upper).
ADU motor (Upper)
PWA-F-ADU
ADU
PWA which relays the sensor signals and drives
the motor.
ADU PWA
MD-0101 OUTLINE
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2.3 Harness Connection Diagram
ADU 02-03-01
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2.4 Board Assembly
1
1
6
6
3
1
1
2
CN215
3
1
IC2
CN216
JP4
CN214
CN213
STK672-210
STK672-210
>
PF-WP
<
JP2
CN217
JP3
1
12
JP1
IC1
12
1
C4
R2
C8
C7
JP10
R4
R3
R6
R10
R11
R12
R13
R14
R15
R16
R17
JP8
JP9
C2
C6
C3
R7
R8
R5
R9
C1
R1
1
15
CN212
CN211
4
1
JP11
RV
PD
ADU 02-04-01
MD-0101 OUTLINE
2 - 4
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3. OPERATIONAL DESCRIPTION
3.1 General Operation
The ADU is a unit which turns over printed paper. Installation of the unit enables duplex printing on paper.
No paper can be stacked in the ADU.
3.2 Block Diagram
ADU
FDMA-D
(
)
)
M
M
ADU motor Lower
PFC
PWA
EXMA-D
+24V
(
ADU motor Upper
ADU
PWA
ADUFL
ADUFU
(
)
)
ADU paper jam sensor Lower
(
ADU paper jam sensor Upper
ADUCOVSW
ADU cover open switch
ADU 03-02-01
The ADU has three sensors and two motors as shown above. One-side-printed paper passes through
the ADU unit to be turned over and returned to the copier. The motor drive circuits (IC1, IC2) only are
installed on the ADU PWA.
The motor signals (EXM-A - D, FDM-A - D) are amplified by IC1 and IC2 and drive the motors. The signal
of each sensor passes through the ADU PWA and is connected as it is to the PFC PWA.
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MD-0101 OPERATIONAL DESCRIPTION
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3.3 Detection of Abnormal Status
3.3.1 Cover open/close detection
When the ADU cover open sensor detects the open state of the cover, the detection signal is sent to the
copier to stop the transport of paper.
3.3.2 Paper jam detection
When the one-side-printed paper is loaded into the ADU, the ADU paper jam sensors (upper/lower) turn
ON (at “High” level) for a fixed time. If the ADU paper jam sensors (upper/lower) do not turn ON or their
ON time is too long, the program will judge it to be paper jamming and stop the operation. The paper
jamming can be cleared by opening the ADU and removing the paper.
MD-0101 OPERATIONAL DESCRIPTION
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3.4 Flow Chart
Start button ON
Scanning of document
NO
All scanning?
Change of document
Start button ON
YES
Cassette feed
Copy
Transport to ADU
Feed from ADU
Copy
Ejection
NO
Final copy
YES
End
ADU 03-04-01
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MD-0101 OPERATIONAL DESCRIPTION
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4. MECHANICAL DESCRIPTION
4.1 Paper Feed System
Exit roller
Flow of paper
ADU paper jam sensor (Upper)
Copier
ADU
ADU paper jam sensor (Lower)
ADU 04-01-01
The ADU has one transport path as shown above and paper enters the ADU from the top and comes out
from the bottom. Paper is not stacked in the ADU but the ADU only transports the paper by using the two
motors.
Flow of Paper
The flow of paper is as follows:
The one-side-printed paper reversed at the exit unit.
The roller in the exit unit reversely turns to draw the paper into the ADU.
The paper having passed through the ADU is loaded again into the copier from the bottom of the
ADU.
ADU 04-04-02
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MD-0101 MECHANICAL DESCRIPTION
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Printing takes place on the back of the paper and the paper is ejected.
Copier side
ADU motor (Upper)
Flow of paper
ADU motor (Lower)
ADU 04-02-01
4.2 Drive System
In the ADU, paper is transported by two pulse motors.The ADU motor (upper) drives the upper roller and
the exit roller of the copier as a result of changing (moving) the gear on the copier side, thereby drawing
in the one-side-printed paper from the copier.
The paper drawn into the ADU is fed into the copier again from the ADU (bottom) by the roller driven by
the ADU motor (lower). The central roller is driven by the ADU motor (lower) through the belt.
MD-0101 MECHANICAL DESCRIPTION
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5. CIRCUIT DESCRIPTION
5.1 PWA Block Diagram
ADU PWA
+24V
1
2
3
4
5
6
1
EXM-D
EXM-B
9
8
7
6
4
5
2
3
EXMA
EXMB
EXMC
EXMD
A
A1
A0
B1
B0
ADU motor
2
AB
B
(
)
Upper
IC2
3
EXM-C
Motor driver
4
EXM-A
BB
VREF
SP
5
ADUCOVSW
ADUFU
12
11
+5V
1
2
6
R6
R7,R8
ADU cover open switch
ADU paper jam sensor
7
ADCNT
SG
SG
PFC
PWA
8
SG
9
+5V
1
2
3
SG
10
11
14
15
14
15
ADUFL
(
)
Lower
+5V
NC
FDM-A
9
8
7
6
4
5
2
3
A
A1
A0
B1
B0
FDM-C
FDM-B
FDM-D
1
2
3
AB
B
IC1
SG
ADU paper jam sensor
Motor driver
(
)
Upper
+5V
BB
VREF
12
SP
11
+5V
+24V
1
2
3
4
+24V
+24V
R14 R15,R16
1
2
3
4
5
6
FDMA
FDMB
FDMC
FDMD
PFC
PWA
ADU motor
PG
PG
(
)
Lower
ADU 05-01-01
The ADU PWA has the motor driving IC only and the other signals pass through the PWA.
IC1 and IC2 are driver IC’s for the stepping motors and drive the ADU motors (upper/lower) on the output
side according to the input signals. IC1 drives the ADU motor (lower), and IC2 the ADU motor (upper).
Vref is the input to determine the value of the current which flows through each motor. The input voltage
there determines the load (current value) to the motor.
ADCNT is a signal which detects connection of the ADU and connected to GND. When its connector is
attached, the signal goes LOW so that the copier can confirm its connection.
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5.2 Meaning of Signals
Signal name
ADUFL
Part name
ADU paper jam
sensor (Lower)
ADU paper jam
sensor (Upper)
Functional description
Detects the transport of
paper (Lower)
Status
Note
High: Paper present Photo sensor
ADUFU
Detects the transport of
paper (Upper)
High: Paper present Photo sensor
ADUCOVSW ADU cover
open switch
Detection of cover
High: Open
Push switch
open/close status during
jam processing, etc.
Drives the roller to transport
paper (Upper)
EXMA-D
FDMA-D
ADU motor
(Upper)
-
-
PM type
pulse motor
PM type
ADU motor
(Lower)
Drives the roller to transport
paper (Lower)
pulse motor
The ADU cover open switch is a switch which detects the open or close state of the cover. A push switch
is used for the switch. The signal goes LOW when the cover is closed, and HIGH when it is open.
The ADU paper jam sensor (upper/lower) detects the presence or absence of paper in the transfer path.
Photo sensors are used for the sensors. When paper passes, the sensor arm in the transfer path is
pressed to turn on the sensor.
The ADU motor (lower) and ADU motor (upper) are 2-phase excitation PM type pulse motors (stepping
motors) and operate according to the drive signals from the driver IC’s (IC1, IC2).
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5.3 Timing Chart
ADU 05-03-01
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MD-0101 CIRCUIT DESCRIPTION
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6. DISASSEMBLY AND REPLACEMENT
[A] ADU hinge cover F/R
1. Remove 2 screws and detach ADU hinge cover
F.
Screw
ADU hinge cover F
223
Screw
Fig. 6-1
2. Remove 2 screws and detach ADU hinge cover
R.
ADU hinge
cover R
Screw
224
Screw
Fig. 6-2
[B] ADU paper guide assembly
1. Pull ADU release lever to release one hook and
open ADU.
ADU release lever
ADU
225
Fig. 6-3
ADU paper guide assembly
Hook
2. Release 2 hooks and remove ADU paper guide
assembly.
226
Fig. 6-4
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[C] ADU
1. Detach ADU hinge cover F. (See Fig. 6-1)
2. Detach ADU hinge cover R. (See Fig. 6-2)
3. Remove one screw and detach harness fixing
plate.
Screw
Harness fixing plate
227-1
Fig. 6-5
4. Remove one screw, detach the ground wire and
the connector.
Screw
Connector
Ground wire
227-2
Fig. 6-6
5. Remove stopper from ADU hinge F.
Snap pin
ADU hinge F
228
Fig. 6-7
6. Open ADU, remove one screw, and remove
plate A.
Screw
Plate A
ADU
229
Fig. 6-8
MD-0101 DISASSEMBLY AND REPLACEMENT
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7. Release one hook and detach the wire.
8. Release 2 hinges and remove ADU.
Wire
ADU
230
Fig. 6-9
Screw
[D] ADU cover
Wire
ADU hook cover R
1. Detach ADU hinge cover F. (See Fig. 6-1)
2. Detach ADU hinge cover R. (See Fig. 6-2)
3. Remove ADU. (See Fig. 6-5 to 6-9)
4. Remove 2 screws, release one hook and wire,
and detach ADU hook cover R.
Hook
231
Fig. 6-10
5. Release 2 hooks, detach one connector, and
remove ADU cover open sensor.
ADU cover
open sensor
Connector
Hook
232
Fig. 6-11
Screw
6. Remove 4 screws and detach ADU cover.
Screw
ADU cover
233
Fig. 6-12
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Clamp
Screw
[E] ADU PWA
1. Detach ADU hinge cover F. (See Fig. 6-1)
2. Detach ADU hinge cover R. (See Fig. 6-2)
3. Remove ADU. (See Fig. 6-5 to 6-9)
4. Detach ADU cover. (See Fig. 6-10 to 6-12)
5. Remove 4 screws, release the harness from the
clamp, and detach PWA cover.
PWA cover
Screw
Clamp
234
Fig. 6-13
6. Detach all the connectors from ADU PWA, re-
lease 4 locking supports, and remove ADU
PWA.
Locking support
ADU PWA
235
Fig. 6-14
CN216
[F] ADU motor
1. Detach ADU hinge cover F. (See Fig. 6-1)
2. Detach ADU hinge cover R. (See Fig. 6-2)
3. Remove ADU. (See Fig. 6-5 to 6-9)
4. Detach ADU cover. (See Fig. 6-10 to 6-12)
5. Detach one connector from ADU PWA (CN216),
remove 2 screws, remove ADU motor by slid-
ing in the direction of the arrow.
ADU motor
Connector
ADU motor
Screw
Note: Apply 0.1g of GREASE (X5-6020) to the
gear tooth surface.
236-1
Fig. 6-15
MD-0101 DISASSEMBLY AND REPLACEMENT
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[G] ADU feed roller shaft upper/clutch 08S018-06CL
1. Detach ADU hinge cover F. (See Fig. 6-1)
2. Detach ADU hinge cover R. (See Fig. 6-2)
3. Remove ADU paper guide assembly.
(See Fig. 6-3 and 6-4)
4. Remove ADU. (See Fig. 6-5 to 6-9)
5. Detach ADU cover. (See Fig. 6-10 to 6-12)
6. Detach PWB cover. (See Fig. 6-13)
7. Remove 2 screws and remove ADU release le-
ver.
ADU release lever
Screw
236-2
Fig. 6-16
8. Release Spring, remove one screw, and remove
ADU release hook R.
ADU release
hook R
Screw
Spring
237
Fig. 6-17
ADU PWB
9. Detach one connector from ADU PWA (CN216).
10. Remove 4 screws, release one clamp, and re-
move ADU motor bracket upper.
CN216
Clamp
Harness
238
Screw
Screw
ADU motor bracket upper
Fig. 6-18
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11. Detach the E-ring, and remove clutch 08S018-
06CL and bushing.
E-ring
Bushing
Clutch 08S018-06CL
239
Fig. 6-19
ADU feed roller
shaft upper
12. Detach stop ring, and remove bushing and ADU
feed roller shaft upper.
Bushing
240
Stop ring
Pin
Fig. 6-20
Pulley
[H] ADU feed roller shaft middle
1. Detach ADU hinge cover F. (See Fig. 6-1)
2. Detach ADU hinge cover R. (See Fig. 6-2)
3. Remove ADU paper guide assembly.
(See Fig. 6-3 and 6-4)
Pulley
Pin
4. Remove ADU. (See Fig. 6-5 to 6-9)
5. Detach ADU cover. (See Fig. 6-10 to 6-12)
6. Detach PWA cover. (See Fig. 6-13)
7. Remove ADU PWA. (See Fig. 6-14)
8. Detach stop ring and remove pulley and timing
belt.
Stop ring
Timing belt
Pulley
Stop ring
241
Fig. 6-21
Note: Be sure to insert the pins when attaching.
MD-0101 DISASSEMBLY AND REPLACEMENT
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ADU feed roller
shaft middle
9. Detach stop ring, remove 2 bushings, and re-
move ADU feed roller shaft middle.
Stop ring
Bushing
Bushing
242
Fig. 6-22
[I] ADU feed roller shaft lower/clutch 08S018-06CL
1. Detach ADU hinge cover F. (See Fig. 6-1)
2. Detach ADU hinge cover R. (See Fig. 6-2)
3. Remove ADU paper guide assembly.
(See Fig. 6-3 and 6-4)
ADU PWA
ADU motor
bracket lower
4. Remove ADU. (See Fig. 6-5 to 6-9)
CN215
5. Detach ADU cover. (See Fig. 6-10 to 6-12)
6. Detach PWB cover. (See Fig. 6-13)
7. Remove timing belt. (See Fig. 6-21)
8. Detach one connector from ADU PWA (CN215).
9. Remove 4 screws, release one clamp, and re-
move ADU motor bracket lower.
Clamp
Harness
Connector
Screw
243
Fig. 6-23
Bushing
ADU feed roller
shaft lower
10. Detach the E-ring, remove clutch 08S018-06CL
and 2 bushings, and remove ADU feed roller
shaft lower.
Clutch 08S018-06CL
Bushing
ADU feed roller
shaft lower
E-ring
244
Fig. 6-24
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