Sony Printer C9000 User Manual

C9000 Series  
Color LED Page Printer  
Service Manual  
ODA  
05-18-200 Based on Rev.2  
41388601TH Rev.2A  
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PREFACE  
This maintenance manual provides procedures and techniques for the troubleshooting, maintenance, and  
repair of C9000.  
This manual is written for maintenance personnel, but it should always be accompanied with the C9000  
User’s Manual for procedures for handling and operating C9000. For repairing each component of C9000,  
see the Troubleshooting manual.  
[Notices]  
The contents of this manual are subject to change without prior notice.  
Although reasonable efforts have been taken in the preparation of this manual to assure its accuracy, this  
manual may still contain some errors and omissions. OKI will not be liable for any damage caused or  
alleged to be caused, by the customer or any other person using this maintenance manual to repair,  
modify, or alter C9000 in any manner.  
[Warning]  
Many parts of C9000 are very sensitive and can be easily damaged by improper servicing. We strongly  
suggest that C9000 be serviced by OKI’s authorized technical service engineers.  
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CONTENTS  
1. SPECIFICATIONS ............................................................................................ 7  
1.1 Basic System Configuration ............................................................................................. 7  
1.2 Printer Engine Specifications ........................................................................................... 8  
1.3 Option Configuration ........................................................................................................ 9  
1.4 Specifications ................................................................................................................. 10  
2. OPERATION DESCRIPTION ......................................................................... 12  
2.1 Main Control Board (CRM-PWB) ................................................................................... 13  
2.2 Engine Control Board (K73 PWB).................................................................................. 15  
2.3 Power Units.................................................................................................................... 16  
2.4 Mechanical Processes ................................................................................................... 17  
2.4.1 Electrophotographic process ............................................................................ 18  
2.4.2 Paper running process ..................................................................................... 22  
2.5 Sensor............................................................................................................................ 31  
2.5.1 Paper related sensors ...................................................................................... 31  
2.5.2 Other sensors ................................................................................................... 32  
2.6 Color Misalignment Correction....................................................................................... 33  
2.7 Transfer Control Responds to Environmental Changes  
(Room Temperatures and Relative Humidities) ............................................................. 33  
2.8 Paper Jam Detection ..................................................................................................... 34  
2.9 Cover Opening ............................................................................................................... 35  
2.10 Toner Low Detection ...................................................................................................... 36  
2.11 Paper Size Detection ..................................................................................................... 37  
2.12 Operation at Power-on ................................................................................................... 38  
2.12.1 Self-diagnostic test ........................................................................................... 38  
2.13 Color Misalignment Detection ........................................................................................ 39  
2.14 Version Read of Periodically Replaced Units ................................................................ 40  
2.15 Life Counter for Replaceable Units ................................................................................ 40  
2.16 Toner Consumption Detection ....................................................................................... 40  
3. PARTS REPLACEMENT................................................................................ 41  
3.1 Precautions in Replacing Parts ...................................................................................... 41  
3.2 Parts Layout ................................................................................................................... 43  
3.3 Replacing Parts.............................................................................................................. 50  
3.3.1 Top cover.......................................................................................................... 51  
3.3.2 LED Assy/ LED Assy spring ............................................................................. 52  
3.3.3 Top cover unit................................................................................................... 53  
3.3.4 Control panel Assy/ Control panel bezel/ LED control PWB/ Toner sensor/  
Stack full sensor/ Control panel tape harness/ Eject roller ............................... 54  
3.3.5 Top cover handle/ Tope cover latch/ Top cover latch spring............................ 55  
3.3.6 Eject guide Assy ............................................................................................... 56  
3.3.7 Cassette Assy/ Blind cover/ Side cover R Assy ............................................... 57  
3.3.8 Feed rollers....................................................................................................... 58  
3.3.9 Left side cover .................................................................................................. 59  
3.3.10 Face-up tray ..................................................................................................... 60  
3.3.11 Front cover ....................................................................................................... 61  
3.3.12 Rear cover ........................................................................................................ 62  
3.3.13 Multipurpose tray Assy/ Multipurpose tray cover Assy/ Links/  
Multipurpose tray top cover/ Multipurpose tray drive gear................................ 63  
3.3.14 Drum contact Assys.......................................................................................... 64  
3.3.15 Registration roller Assy (A)/ Registration drive gear (A)................................... 65  
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3.3.16 Registration roller Assy (B)............................................................................... 66  
3.3.17 Registration clutch, Registration motor Assy.................................................... 67  
3.3.18 Cooling fan ....................................................................................................... 68  
3.3.19 Color registration sensor Assy.......................................................................... 69  
3.3.20 Duplex guide Assy ............................................................................................ 70  
3.3.21 Electrical chassis/ Electrical chassis cooling fan .............................................. 71  
3.3.22 Printer engine controller PWB .......................................................................... 72  
3.3.23 Printer unit chassis ........................................................................................... 73  
3.3.24 Entrance cassette sensor actuator ................................................................... 74  
3.3.25 Entrance sensor PWB ...................................................................................... 75  
3.3.26 Entrance MT sensor actuator and Entrance belt sensor actuator .................... 76  
3.3.27 Main motor fan/ Fuser eject roller..................................................................... 77  
3.3.28 Eject sensor Assy ............................................................................................. 78  
3.3.29 Fuser latching handle (L).................................................................................. 79  
3.3.30 Belt motor Assy ................................................................................................ 80  
3.3.31 Fuser latching handle (R) ................................................................................. 81  
3.3.32 Main motor Assy............................................................................................... 82  
3.3.33 Contact Assy/ Side plate Assy.......................................................................... 83  
3.3.34 Low voltage power supply ................................................................................ 84  
3.3.35 High voltage power supply ............................................................................... 85  
3.3.36 Main feed Assy ................................................................................................. 86  
3.3.37 Fuser unit.......................................................................................................... 87  
3.3.38 Belt unit............................................................................................................. 88  
3.3.39 Duplex unit........................................................................................................ 89  
3.3.40 CU Assy............................................................................................................ 90  
4. Adjustment .................................................................................................... 92  
4.1 Maintenance Menu and Its Functions ............................................................................ 92  
4.2 Short Plug Settings ........................................................................................................ 93  
4.3 Printing Singly Using Controller-Equipped Printer ......................................................... 93  
4.4 Adjustment after Part Replacement ............................................................................... 94  
4.5 Color Balance Adjustment ............................................................................................. 95  
4.6 EEPROM Replacement after CRM Board and K73 Board Replacement ...................... 97  
5. Regular Maintenance .................................................................................... 98  
5.1 Parts to be Replaced Regularly ..................................................................................... 98  
5.2 Cleaning ......................................................................................................................... 98  
5.3 Cleaning of LED Lens Array .......................................................................................... 98  
5.4 Cleaning of Pick-up Roller ............................................................................................. 98  
6. TROUBLESHOOTING PROCEDURES ......................................................... 99  
6.1 Tips for Troubleshooting ................................................................................................ 99  
6.2 Check Points before Correcting Image Problems .......................................................... 99  
6.3 Tips for Correcting Image Problems .............................................................................. 99  
6.4 Preparation for Troubleshooting .................................................................................. 100  
6.5 Troubleshooting Flow................................................................................................... 100  
6.5.1 LCD Message List .......................................................................................... 101  
6.5.2 LCD message troubleshooting ....................................................................... 106  
6.5.3 Image troubleshooting .................................................................................... 117  
7. WIRING DIAGRAM...................................................................................... 129  
7.1 Resistance Check ........................................................................................................ 129  
7.2 Parts Layout on Boards ............................................................................................... 134  
8. Parts List ...................................................................................................... 138  
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1.  
SPECIFICATIONS  
1.1 Basic System Configuration  
The basic system configuration of C9000 is illustrated in Figure 1.1.  
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1.2 Printer Engine Specifications  
The inside of the printer is composed of the followings:  
• Electrophotographic Processor  
• Paper Paths  
• Controller Block (CU and PU)  
• Operator Panel  
• Power Units (High-Voltage Unit and Low-Voltage Unit)  
Figure 1-2 shows the printer configuration.  
Figure 1.2  
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1.3 Option Configuration  
The followings are available as options on C9000.  
(1) 2nd Tray/ 3rd Tray  
(2) Duplex Unit  
(3) Large-Capacity Tray  
(4) Expansion Memory 64/128/256MB  
(5) Internal Hard Disk  
(6) Ethernet Board  
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1.4 Specifications  
(1) Dimensions Height: 18.11 in.  
Width: 26.22 in.  
Length: 24.65 in.  
(2) Weight  
(3) Paper  
158.7 lbs.  
Type: Ordinary paper and transparencies (Recommended: ML OHP01)  
Size:  
Postal card, Legal 13" or 14", Executive, A4, A5, B5, A6, A3 A3-Nobi, B4  
(Only the 1st tray and the front feeder support A6 and postal card  
sizes.)  
Weight: 1st tray  
2
55 kg to 90 kg (64 to 105g/m )  
2
Front feeder 55 kg to 140 kg (64 to 163g/ m )  
(4) Print Speed Color: 21 pages per minute (Transparency: 5 pages per minute)  
Monochrome: 26 pages per minute (Transparency: 15 pages per minute)  
Postal Card, Label, Thick Paper: 10 pages per minute  
(5) Resolution 600 × 600 DPI / 600 x 1200 DPI (C9200 series) & 1200 x 1200 DPI (C9400 series)  
(6) Power Input 100VAC ±10%  
(7) Power Consumption  
Peak: 1400W  
Idle: 150W  
Normal Operation: 550W (5% duty)  
Power Saving Mode: 50W  
(8) Frequency 50Hz or 60Hz ± 2%  
(9) Noise  
Operating:  
Standby:  
54 dB (without Second tray)  
45 dB  
Power Saving: 43 dB  
(10) Consumable Life Toner Cartridge: 15,000 pages (5% duty)  
(in each of Y, M, C and K)  
(in each of Y, M, C and K)  
Image Drum:  
39,000 pages (5% duty, Continuous printing)  
(11) Parts Replaced Periodically Fuser Unit Assy:  
Belt Cassette Assy:  
Every 80,000 pages  
Equivalent of 80,000 pages (3P/J)  
Transfer Belt cartridge: 60,000 prints  
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(12) Temperatures and Relative Humidities  
Temperature  
Temperature (ºF)  
Temperature (ºC)  
Remark  
17 to 27ºC (Temperatures to  
assure full color print quality)  
Operating  
50 to 89.6  
10 to 32  
Non-Operating  
32 to 109.4  
-14 to 109.4  
-20 to 122  
-20 to 122  
0 to 43  
-10 to 43  
-29 to 50  
-29 to 50  
Power-off  
Storage (Max. One Year)  
Transport (Max. One Month)  
Transport (Max. One Month)  
With drum and toner  
With drum and without toner  
With drum and toner  
Humidity  
Relative Humidity (%) Max. Wet-Bulb Temperature (ºC)  
Remark  
Operating  
20 to 80  
25  
50 to 70%  
(Humidities to assure full color print quality)  
Non-Operating  
Storage  
10 to 90  
10 to 90  
10 to 90  
26.8  
35  
Power-off  
Transport  
40  
(13 Printer Life 1,000,000 pages (on a A4 basis) or five years  
41388601TH Rev.2  
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2.  
OPERATION DESCRIPTION  
C9000, a tandem color electrophotographic page printer, adopts technologies such as 4992-LED  
array,OPC,drysingle-componentnon-magneticdeveloping,rollertransferandheat-compression  
fusing. The printing method is black writing by shedding light on print areas.  
Figure 2-1 provides the block diagram of this device.  
S1 Gray  
Y1 White  
S1  
S
A
A
STUCK POWER  
TNRC  
P16 Browm  
P15 Red  
P27  
P31  
P T O N  
D U P _ P A P  
P14  
TNRM  
L I M A  
0 0 2 C 1  
0 0 2 M 1  
P14 Yellow  
P O C W  
P O M W  
P18 Blue  
P26  
P30  
0 0 2 K 1 0 0 2 Y 1  
P K O W P Y O W  
P13  
P17  
P18  
P12  
P22  
TNRY  
P18 Red  
P12 Yellow  
aRV  
attached  
to clutch  
P25  
P29  
P18 Yellow  
P21  
P11  
P19  
TNRK  
P20  
PANEL  
P18 Black  
P10  
P24  
P28  
P19 White  
Black  
White  
P1  
Operator  
Panel  
X71 Board  
Y5 Blown  
attached to motor  
P2 White  
Y3 Red  
Y3 Yellow  
Y4 Green  
P4 Green  
D2 Yellow  
D2 Green  
Black  
White  
Black  
White  
I DPOSK  
I DPOSY  
I DPOSM  
I DPOSC  
IDK  
K Charge Elimination Lamp Fuse  
IDY  
Y Charge Elimination Lamp Fuse  
IDM  
M Charge Elimination Lamp Fuse  
IDC  
C Charge Elimination Lamp Fuse  
Black  
Black  
Figure 2.1  
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2.1 Main Control Board (CRM-PWB)  
Figure 2-2 provides the block diagram of the main control board (CRM-PWB).  
I F B u s  
· 4  
S D R A M D I M M  
3 ×  
F L A S H D I M M  
M O  
F L A S H R  
1 6 2 2 1 2  
F E T S W  
Figure 2.2  
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(1) CPU  
The CPU is 64-bit bus RISC processor PowerPC750, which receives an input of 80MHz  
(=BUS CLK) and operates at 400MHz, four-times the input.  
(2) Secondary Cache SRAM  
SRAM is included as a secondary cache of the CPU on the board.  
(3) ROM  
The ROM is inserted into the three 168-pin DIMM slots. The slot A is for a program ROM  
and the slot B is for the Japanese Kanji font. The slot C is not assigned.  
(4) RAM  
The RAM is inserted into the four 168-pin DIMM slots. The DIMMs must be fitted in  
descending order of the type No. labeled on each of them into the slots 1, 3, 2 and 4.  
SDRAM DIMM Specifications:  
Speed:  
Capacity:  
PC100 or more  
64/128/256MB  
Configuration: Without parity and ECC. Requires the SPD information. Number of  
chips contained = 8 or 16.  
(5) EEPROM  
The EEPROM (16Kb), an 8-pin DIP package, is inserted into the IC socket supplying the 3.3V  
power. Settings for controlling the controller block are stored in the memory.  
(6) Flash ROM  
A 2-megabyte flash ROM is surface-mounted on the CRM board. The flash ROM, composed  
of four chips of 256 kilo x 16 bits, can store fonts and macros.  
(7) Memory Control LSI (CI)  
A 696-pin BGA package ASIC made by NEC, which is equipped with a cooling heat sink and  
mainly controls the CPU I/F, memory, video data compression and decompression, and PU-  
video I/F.  
(8) Interface Control LSI (C2)  
A BGA package ASIC made by Toshiba, which controls the PU command I/F, operator panel  
I/F, IDE I/F, Centronics I/F, USB I/F, PCI I/F, EEPROM and SPD (SDRAM DIMM) I/F.  
(9) IDE HDD  
An IDE connector is surface-mounted on the board to which an IDE HDD, assembled using  
molds for the purpose, is connected. The IDE HDD is used for storing font data, spooling  
edited video data temporarily and registering form data.  
(10) PCI Bus Option  
Two PCI I/F slots are provided for option board use. The bus, which uses an Oki Data original  
connector, can accept an Ethernet board.  
(11) Host Interface  
Standard:  
Centronics two-way parallel I/F (IEEE-1284-compliant)  
USB (USB1.1-compliant)  
Additional Board: (connected to PCI BUS)  
Ethernet Board  
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2.2 Engine Control Board (K73 PWB)  
28MHz  
Fan control  
Control Panel  
Duplex  
Cover front/upper open  
Stacker full  
Cassette 2/3  
CPU  
Analog output  
MSM66Q577  
Test switch  
(Color registration sensor adjustment)  
Analog input  
(Temperature change)  
A/D CON  
(Power supply cooling)  
Analog Input  
Switch  
Analog input (OHP)  
Analog input (Various densities)  
8Mbit(1MByte)  
FLASH  
256Kbit(32KByte)  
SRAM  
×
2
CPU BUS  
Motor interruption  
UART interruption  
K Head I/F  
48MHz  
Y Head I/F  
M Head I/F  
C Head I/F  
32bit Video I/F  
Heater control  
Motor Driver  
Fuse Cut Driver  
EEPROM  
LSI  
Motor Driver  
(VIDEO MEM  
Containing  
4Mbit DRAM)  
D/A  
9x Pulse Motors  
DC Motor  
(Geared Motor)  
DC Motor Driver  
Toner and ID sensors ID check  
High-Voltage Power Supply  
Serial Interface (2 channels)  
CU I/F  
Paper Feed System Sensors  
(Paper Feed, Paper Registration and Eject Sensors)  
MT Sensor (Stage position and paper empty)  
Cassette 1 Sensor (Paper empty and near empty)  
Shutter, clutch, belt and fuser checks  
Cassette size  
Figure 2.3  
The engine control block (PU) is controlled by the engine control board (K73 PWB) which consists  
of a CPU (MSM66Q577), general LSI chip, flash ROM, EEPROM, pulse motor drivers, and video  
memory (see Figure 2.3).  
(1) CPU  
This, a 16-bit CPU with an AD converter (OKI MIM66Q577), controls the entire system.  
(2) General LSI  
This LSI (MG63P011-001LA), which is contained in the printer engine control block,  
incorporates 4 megabits of video memory and has functions such as engine-controller  
interfacing, LED interfacing, motor control, sensor input, video memory control, main scan  
color misalignment correction, skew correction and high-voltage power supply control.  
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(3) Flash ROM  
8 megabits of flash ROM (MBM29F800TA-70) which stores PU programs.  
(4) EEPROM  
4kilobitsofEEPROM(NM93C66N-NW)whichismountedontheboardwithanICsocketand  
stores correction values.  
(5) Pulse Motor Driver  
The pulse motor driver (A2918, A2919, A3955) drives nine pulse motors to revolve the EP  
and carry media.  
(6) SRAM  
This SRAM (62256LFP-7LL) is used as working memory of the CPU.  
2.3 Power Units  
There is a low-voltage power unit, which consists of an AC filter circuit, low-voltage power circuit  
andheaterdrivercircuit, andahigh-voltagepowerunitwhichsuppliesahigh-voltagepowercircuit.  
(1) Low-Voltage Power Unit  
This circuit generates the following voltages:  
Output voltage  
+3.3 V  
Use for  
Logic circuit power supply  
Logic circuit power supply  
+3.8V  
+5 V  
Motor and drive voltage for high-voltage power supply  
OP Amp, High-voltage power supply  
LED head  
+32 V  
+12 V  
(2) High-Voltage Power Unit  
This circuit generates the following 34V or more voltages, which are required for electropho-  
tographic process, according to control sequences from the control board.  
Output  
CH  
Voltage  
-900 to -1400±50V  
Y, M, C: -10 to -400V/+300V  
-10 to -400V/+300V  
Y, M, C: -100 to -700/0V  
0 to 7KV  
Use for  
Remarks  
Voltage to charging roller  
Voltage to developing roller  
DB  
K:  
SB  
Voltage to toner supplying roller  
Voltage to transfer roller  
TR  
Variable  
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2.4 Mechanical Processes  
Figure 2.4 shows the mechanical processes of the printer.  
Figure 2.4  
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2.4.1 Electrophotographic process  
(1) Electrophotographic process  
The following is the outline of electrophotographic process:  
1 Charging  
DC voltage is applied to the charging roller and the surface of the OPC drum is negatively  
and evenly charged.  
2 Exposure  
The LED head, under image signals, emits light to the negatively charged surface of the  
OPC drum. The radiated portions of the drum surface attenuate in negative charge  
according to the intensity of the light and, based on the surface potentials, a latent  
electrostatic image is formed on the drum surface.  
3 Development  
Negatively charged toner contacts the OPC drum and, by electrostatic force, adheres to  
the latent electrostatic image to form a clear image on the drum surface.  
4 Transfer  
Paper is placed on the surface of the OPC drum, and positively, or opposite to the polarity  
of the toner, charged by the transfer roller on its back to transfer the toner image to the  
paper.  
5 Cleaning  
The cleaning blade removes residual toner from the OPC drum after the transfer.  
6 Fusing  
The toner image on the paper is fused into place through the application of heat and  
pressure to it.  
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(2) Charging  
Negative DC voltage is applied to the charging roller contacting the surface of the OPC drum.  
Power  
Unit  
Charging roller  
OPC drum  
(3) Exposure  
The negatively charged surface of the OPC drum is radiated with light from the LED head.  
The negative charge of the radiated portions of the drum surface attenuates in response to  
the intensity of the light and a latent electrostatic image responsive to the potentials of the  
surface is formed on the drum surface.  
LED head  
LED head  
Charging roller  
Power  
Unit  
OPC drum  
Paper  
OPC drum  
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(4) Developing  
By the adhesion of toner to the latent electrostatic image on the drum surface, the image is  
changed to a toner image. The developing is processed at the contact part between the OPC  
drum and the developing roller.  
1 The sponge roller causes toner to adhere to the developing roller. The toner becomes  
negatively charged.  
Developing roller  
Developing blade  
Charging roller  
Sponge roller  
Developing roller  
OPC drum  
2 The developing blade removes excess toner from the developing roller and a thin layer  
of remaining toner is formed on the developing roller.  
3 The toner is drawn by the latent electrostatic image at the contact portion between the  
OPC drum and the developing roller.  
The latent electrostatic image on the drum surface is made visible with the toner.  
(5) Transferring  
The transfer roller, which is made of conductive sponge, presses paper against the surface  
of the OPC drum and brings the paper into intimate contact with the drum surface.  
The paper is placed on the drum surface and positively (opposite to the charge of the toner)  
charged by the transfer roller on its back.  
Applying positive high voltage from the power supply to the transfer roller moves the positive  
charge induced by the transfer roller to the paper surface at the contact portion between the  
transferrollerandthepaper, thepapersurfacedrawingthenegativelychargedtonerfromthe  
drum surface.  
OPC drum  
Paper  
Carrier belt  
Transfer roller  
Power unit  
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(6) Fusing  
When passed between the heat roller and the backup roller, the toner image transferred to  
the paper is fused into place by the application of heat and pressure to it.  
The Teflon coated heat roller is heated by the built-in heat roller of 800W/backup roller of  
500W (halogen lamp). The fusing temperature is controlled by the sum of the temperature  
detected by the thermistor moving over the surface of the heat roller and the temperature  
detected by the thermistor moving over the surface of the backup roller. A thermostat, which  
is provided for safety, becomes open by a heat roller temperature rise of not less than fixed  
degrees and cuts off voltage supply to the heater. The backup roller is being pressed against  
the heater by the pressure springs on both sides.  
Thermostat  
Thermistor  
Heat roller  
Paper  
Thermostat  
Backup roller  
Thermistor  
(7) Cleaning  
Non-fused, residual toner on the OPC drum is scraped with the cleaning blade and collected  
in the waste toner area of the toner cartridge.  
Waste toner area  
(8) Cleaning  
Residual toner on the transfer belt is scraped with the cleaning blade and collected in the  
waste toner box of the transfer belt unit.  
Cleaning blade  
Waste toner box  
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2.4.2 Paper running process  
Figure 2.5 shows how paper moves in the C9000.  
Fuser  
Registration roller Assy (B)  
Face-down stacker  
Heat roller  
4 x LED Units  
4 x LED heads  
Registration roller Assy (B)  
Hopping roller  
Eject roller  
Multipurpose tray  
Belt unit  
Eject roller  
Low-voltage power supply  
Cassette 1  
Registration roller Assy (A)  
High-voltage power supply  
Cleaning blade  
Transfer roller  
Cassette 2  
Feed roller  
Cassette 3  
Cassette 4  
Backup roller  
Cassette 5  
Figure 2.5 Paper Route  
41388601TH Rev.2  
21 /  
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(1) Paper Loading from 1st Tray  
1. The paper loading motor runs (CCW), the paper loading clutch is engaged and, until the  
entrance cassette sensor is turned on, paper is advanced (the on/off operations of the  
paper loading clutch control the pickup roller).  
2. After the paper turns the entrance cassette sensor on, the paper is forwarded a further  
fixed length and touches the registration roller Assy (A) (this corrects paper skew).  
3. The electromagnetic clutch is engaged and the paper is carried onto the carrier belt.  
Registration roller Assy (B)  
Registration motor  
Entrance sensor  
Entrance belt sensor  
Electromagnetic clutch  
Entrance cassette sensor  
Registration roller Assy (A)  
Feed roller  
Electromagnetic clutch  
Pickup roller  
Loading sensor  
Paper  
Retard roller  
Loading motor  
Figure 2.6  
41388601TH Rev.2  
22 /  
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(2) Paper Loading from Option Tray  
1. The paper loading motor runs (CW), the paper loading clutch is engaged and, until the  
carrier sensor on a tray which sits atop a loading tray is turned on, paper is advanced.  
2. After the paper turns the carrier sensor on, the paper is forwarded a further fixed length  
and touches the carrier roller (this corrects paper skew).  
3. The carrier clutch is thrown in and the paper is fed into the main body.  
Pinch roller  
Carrier roller  
Carrier clutch  
Carrier sensor  
Planet gear  
Paper loading clutch  
Feed roller  
Upper tray  
Paper loading sensor  
Optional paper loading tray  
Pickup roller  
Retard roller  
Paper loading motor  
Figure 2.7  
41388601TH Rev.2  
23 /  
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(3) Paper Loading from Multipurpose Tray (MT)  
1. The release lever usually pushes down the hopping plate to a position to turn the micro  
SW on (Figure 2.8-a).  
2. The running of the motor in the (a) direction drives the MT feed roller, causing the cam to  
turn. The cam pushes the release lever and the hopping plate picks up paper sent out by  
the MT feed roller (Figure 2.8-b), where the registration roller Assy (B) does not move as  
its one-way clutch gear (1) idles.  
3. After the front edge of the paper turns the entrance sensor on, the paper is forwarded a  
fixed length. The paper stops when its front edge reaches the registration roller Assy (B).  
4. Concurrently, the cam pushes down the hopping plate. The release lever that has been  
placed in its original position by the spring locks the hopping plate (Figure 2.8-c).  
5. Afterthecompletionofthepaperfeedoperation, theregistrationmotorrunsinthedirection  
ofthearrow(b)todrivetheregistrationrollerAssy(B),wheretheone-wayclutchgeardoes  
not allow the MT feed roller to move.  
Oneway clutch gear (2)  
MT feed roller  
Entrance sensor  
Paper  
Entrance belt sensor  
b
a
Registration roller Assy(B)  
Oneway clutch gear (1)  
Registration motor  
Figure 2.8  
Spring  
Relerse lever  
Hopper plate  
Feed roller  
Micro SW  
Figure 2.8-a  
Figure 2.8-b  
Figure 2.8-c  
41388601TH Rev.2  
24 /  
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(4) Carrier Belt  
1. The running of the carrier belt motor in the direction of the arrow (a) drives the carrier belt.  
The belt unit sits with one carrier roller immediately below each color’s drum, and the  
carrier belt between them. By the application of a fixed voltage, the carrier belt and carrier  
roller feed paper on the carrier belt into the fuser unit, transferring a toner image from  
each color’s drum.  
Drum  
Carrier belt  
K
Y
M
C
Carrier (transfer) roller  
Figure 2.9  
Carrier (transfer) belt motor  
41388601TH Rev.2  
25 /  
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(5) Driving and Up-and-Down Movements of I/D Unit  
1. The I/D unit driving and up-and-down movements are effected by a single-pulse motor.  
The running of the main motor in the direction of the arrow (a) turns the lever 1 to the left.  
Then, the lever 2 that was lifted by the lever 1 lowers to move down the I/D unit. After the  
up-and-down sensor is turned on (Figure 2.10-c), the specified downward pulsing places  
the I/D unit in its lowest position (or equivalently, printing position).  
The drum gear engages with the driving gear and starts revolving to transfer an image on  
the drum to running paper, where the one-way gear idles upon placement of the lever in  
its lowest position.  
2. With the running of the main motor in the direction of the arrow (b), the lever 1 pushes up  
the I/D unit via the lever 2. After the up-and-down sensor is activated (Figure 2.10-d), the  
lever 1 lifts the I/D unit to a specified level and stops to keep space to an extent between  
the drum and the carrier belt (Figures 2.10-c and 2.10-e).  
The drum gear is not engaged with the driving gear and does not revolve.  
3. When the two pins of the up-and-down sensor are pushed up by the I/D unit, and touches  
and electrically connected to the plate above the pins, the sensor recognizes the on state.  
When the two pins are pushed down by the I/D unit, and separated and insulated from the  
plate, the sensor recognizes the off state.  
The installation of the I/D unit can also be verified by recognizing the off state of the up-  
and-down sensor.  
I/D unit  
Drum  
Lever 2  
One-way gear  
Driving gear  
Lever 1  
a
b
Figure 2.10-a  
Figure 2.10-b  
41388601TH Rev.2  
26 /  
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Plate  
Pin  
Spring  
Board  
Up-and-down Sensor  
Figure 2.10-c  
Figure 2.10-d  
Figure 2.10-e  
41388601TH Rev.2  
27 /  
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(6) Fuser Unit and Paper Ejection  
1. A single-pulse motor drives the fuser unit and the eject rollers.  
In response to the running of the heat motor in the direction of the arrow (a), the heat roller  
turns. This roller fuses a toner image to paper by heat and pressure.  
2. At the same time, the four eject rollers move to eject the paper.  
3. The paper separator solenoid switches the path back and forth between the route to the  
face-up stacker and the route to face-down stacker.  
Eject rollers  
Fuser unit  
Paper separator  
Heat rollers  
Face-up stacker  
a
Fuser motor  
Figure 2.11  
41388601TH Rev.2  
28 /  
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(7) Duplex Unit  
1. When the duplex unit receives an instruction from the printer to print on both sides of a  
sheet of paper, the solenoid opens the separator after the completion of one side printing  
of a sheet of paper sent from the tray. The path is switched to that to the duplex unit.  
At this time, as the roller (1) turns in the direction of the arrow “a,” the paper is retracted  
on the rear of the cassette.  
2. When fixed time has elapsed after the front edge of the paper passes through the duplex-  
in sensor, the rollers reverse and the roller (1) turns in the direction of the arrow “b” to feed  
the paper into the duplex unit. After that, the paper passes through the rollers (2), (3) and  
(4), and ejected with the other side printed, and fed again into the printer.  
Separator  
Solenoid  
Duplex-in sensor  
a
b
Roller(1)  
Roller(4)  
Roller(3)  
Roller(2)  
Motor  
Figure 2.12  
41388601TH Rev.2  
29 /  
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2.5 Sensor  
2.5.1 Paper related sensors  
Face-down paper eject sensor  
Paper eject roller  
Face-down sensor  
Stacker full sensor  
C drum  
Entrance belt sensor  
M drum  
Y drum  
K drum  
Heat roller  
Paper eject sensor  
MT feed roller  
Pinch roller 2  
Driving roller  
Pinch roller 1  
Driving roller  
Carrier belt  
Registration roller A  
Backup roller  
Belt cleaning blade  
Registration roller B  
Entrance cassette sensor  
Entrance MT sensor  
Duplex front sensor  
Duplex-in sensor  
1st feed roller  
2nd feed roller  
Auxiliary roller  
Duplex rear sensor  
Duplex roller  
Duplex feed roller  
Carrier sensor  
Sensor  
Function  
Sensor status  
Entrance MT Sensor  
Entrance Cassette sensor switching from hopping to carriage.  
Detects the beginning of incoming paper to determine the timing for  
ON : Paper exists.  
OFF: Paper is empty.  
Entrance Belt sensor  
Paper Eject sensor  
Duplex-In sensor  
Detects the beginning of transferred paper and, based on the time taken  
until the paper front edge reaches the sensor, determines the paper length. OFF: Paper is empty.  
ON : Paper exists.  
Detects the beginning and end of paper to determine the paper ejection  
timing.  
ON : Paper exists.  
OFF: Paper is empty.  
Detects the beginning of paper which enters into the duplex unit to  
determine the time taken until the reversed rollers turn in forward direction. OFF: Paper is empty.  
ON : Paper exists.  
Duplex Rear sensor  
Duplex Front sensor  
Stacker Full sensor  
Detects the beginning of paper after the turns in reverse direction, in the  
duplex unit.  
ON : Paper exists.  
OFF: Paper is empty.  
Detects the end of paper after the turns in reverse direction to determine  
the paper ejection timing, in the duplex unit.  
ON : Paper exists.  
OFF: Paper is empty.  
Detects the face-down stacker full of paper.  
ON : Stacker is full.  
OFF: Stacker is empty.  
Face-Down Paper Eject  
sensor  
Detects paper carriage to the paper eject roller to determine the timing for ON : Stacker is full.  
job offset operation.  
OFF: Stacker is empty.  
Face-Down Route sensor Detects the face-down carrier route jammed with paper when it has a  
paper jam.  
ON : Stacker is full.  
OFF: Stacker is empty.  
Carrier sensor  
Detects paper carriage from the option tray.  
ON : Stacker is full.  
OFF: Stacker is empty.  
41388601TH Rev.2  
30 /  
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2.5.2 Other sensors  
1
2
3
4
Paper Empty sensor  
This sensor checks whether the paper cassette is empty.  
Paper Near sensor  
This sensor checks whether the paper cassette is near empty.  
MPF Paper Empty sensor  
This sensor checks whether the front feeder has paper.  
MPF Hopping switch  
This microswitch checks whether the front feeder table is in the up position or in the down  
position.  
5
6
7
8
Stacker Full sensor  
This sensor checks whether the stacker is full.  
Paper Size switch  
This sensor detects the size of paper in the paper cassette.  
EP Up/Down sensor (one for each of colors, Y, M, C and K)  
This sensor checks whether the I/D unit is in the up position or in the down position.  
Toner K, Y, M and C sensors  
By measuring the time interval between regular opening movements of each sensor’s lever,  
the sensor checks whether its toner cartridge is empty.  
9
0
A
B
Temperature sensor  
See Section 2.6 (Transfer Control Responds to Environmental Changes)  
Humidity sensor  
See Section 2.6 (Transfer Control Responds to Environmental Changes)  
OHP sensor  
This sensor detects the presence or the absence of transparencies.  
Alignment sensor  
Whencolormisalignmenthasbeencorrected,thissensorreadsthealignmentpatternprinted  
at the right and left ends of the transfer belt (see Section 2.13).  
41388601TH Rev.2  
31 /  
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2.6 Color Misalignment Correction  
C9000 is equipped with multiple LED heads, which can result in color misalignment.  
The mechanically induced color misalignment is automatically corrected as follows:  
(1) Color alignment to be corrected  
1 Color misalignment in X-axis direction (Positional error caused by LED head)  
2 Color misalignment in slanting direction (Positional error caused by LED head)  
3 Color misalignment in Y-axis direction (Positional error caused by I/D unit and LED head)  
(2) Correcting  
Printing the preset color misalignment detection pattern on the belt and, by a reflection  
sensor, reading the printed pattern detects each color’s misalignment value to determine its  
correction value. The correction value is used to change each color’s (Cyan, Magenta and  
Yellow) writing timing in comparison with that of Black.  
2.7 Transfer Control Responds to Environmental Changes (Room Temperatures and  
Relative Humidities)  
C9000 measures room temperature and relative humidity using a room temperature sensor and  
humidity sensor, and calculates an optimum transfer voltage under its measurement environment  
to perform real-time control on printing with the optimum voltage.  
41388601TH Rev.2  
32 /  
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2.8 Paper Jam Detection  
C9000 detects paper jams after power-on and during printing. When a paper jam occurs, the  
printer immediately suspends the printing operation. Opening the cover to remove the jammed  
paper and closing it resumes the printing.  
LCD Error Code  
400  
Error  
Description  
Paper Size Error  
The entrance cassette sensor does not turn off within fixed time  
after it turns on. Loading of plural sheets of paper is sensed.  
Misfeed from Duplex Carrier Assembly Paper could not be loaded from the duplex carrier assembly.  
372  
390  
Misfeed from Multipurpose Tray (MT)  
Paper could not be loaded from the MT (the entrance MT  
sensor does not turn on within fixed time after the hopping).  
Paper could not be loaded from the cassette 1, 2, 3, 4 or 5 (the  
entrance cassette sensor does not turn on within fixed time after  
the hopping).  
Misfeed from Cassette 1, 2, 3, 4 or 5  
5-395  
4-394  
3-393  
2-392  
1-391  
370  
Duplex Paper Jam in Reversing  
Duplex Unit Entrance Paper Jam  
The duplex rear sensor does not turn on during the paper  
reversing operation of the duplex unit.  
The duplex-in sensor does not turn on during the paper loading  
in the duplex unit.  
383  
Duplex Unit Input Paper Jam  
Paper Ejection Jam  
The duplex front sensor does not turn on during the operation.  
The paper eject sensor does not detect the end of paper within  
fixed time after sensing the beginning of it. The paper eject  
sensor does not turn off after it turns on.  
371  
382  
Paper Carriage Jam  
Loading Jam  
The paper eject sensor does not turn on while paper is running  
on the belt.  
Paper does not reach the entrance belt sensor or the MT sensor  
after the completion of the hopping.  
381  
380  
MT Paper Empty  
Printing occurs with no paper in the MT.  
490  
Cassette 1, 2, 3, 4 or 5 Paper Empty  
The cassette 1, 2, 3, 4 or 5 has no paper.  
5-495  
4-494  
3-493  
2-492  
1-491  
Entrance belt sensor  
Entrance MT sensor  
Paper Ejection  
Multipurpose Tray  
(MT)  
Paper Ejection  
Paper Carriage  
Paper eject sensor  
Duplex Input  
Misfeed from MT  
Duplex Entry  
Entrance cassette sensor  
Misfeed from Duplex Unit  
Misfeed from Cassette 1  
Misfeed from Cassette 2  
Misfeed from Cassette 3  
Misfeed from Cassette 4  
Duplex-in sensor  
Cassette  
1
Duplex front sensor  
Duplex rear sensor  
Cassette  
Cassette  
2
3
Duplex Rear Sensor  
Misfeed from Cassette 5  
Cassette  
Cassette  
4
5
41388601TH Rev.2  
33 /  
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2.9 Cover Opening  
When the top cover of the printer is open, the cover open microswitch turns opens to cut off the high-  
voltage power supply, and outputs which are not less than 32V. At the same time, the CPU receives  
CVOPN signals indicating the status of the microswitch and performs cover open operations.  
Top cover microswitch  
71K-PCB  
CPU  
+32V  
66577  
Detection  
Circuit  
COVOPN (2P)  
P10, 5  
P7, 6  
High-voltage power supply board  
HVOLT (16P)  
detect  
circuit  
detect  
circuit  
FCOVER(3P)  
+32V  
Front cover  
microswitch  
Duplex unit  
V71-PCB  
+32V  
Duplex (16P)  
41388601TH Rev.2  
34 /  
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2.10 Toner Low Detection  
• Structure  
This device consists of the stirring gear which revolves at a constant speed, the stirring bar, and  
the magnet on the stirring bar. The stirring bar turns in synchronization with the protrusion of  
the stirring gear.  
Stirring gear  
Link  
Stirring bar  
• Detection  
Atonerlowconditionisdetectedbymeasuringthecontacttimebetweenthesensorlevermagnet  
and the stirring bar.  
Toner low sensor  
Sensor lever A  
Toner Full Condition  
• The stirring bar turns in synchronization with the  
stirring gear.  
Sensor lever B  
• Since the opposite side is in toner, the stirring bar  
turns by the force of the stirring gear even when  
thestirringmagnetisplacedinitshighestposition.  
Toner cartridge  
Stirring bar  
Toner Low Condition  
Toner low sensor  
Sensor lever A  
• The stirring bar reaches its highest position, then  
falls to its lowest position under its own weight  
because of the absence of toner resistance on the  
opposite side. In this situation, bar-magnet con-  
tact time becomes long. By measuring the time,  
a toner low condition can be detected.  
Sensor lever B  
Toner cartridge  
Stirring bar  
41388601TH Rev.2  
35 /  
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Toner Full Condition (At warming-up,A4 transverse:16ppm *1)  
t1  
t1 1.12  
TNRSNS  
T=2.3  
Toner Low Condition (At warming-up,A4 transverse:16ppm *1)  
t1  
t1 1.12  
TNRSNS  
T=2.3  
When the toner low condition is detected 20 consecutive times, toner low is detected.  
(The toner low message is displayed when about 1000 A4 sheets at 5% density have been printed  
after toner low had been detected.)  
The detection is not performed until toner low occurs after the detection of toner low.  
When the toner full condition is detected 10 consecutive times, toner low is removed.  
When the toner sensor remains unchanged for more than 15 cycles of 2.3 seconds, the toner  
sensor alarm is activated.  
The toner sensor does not perform the detection while the drum motor is not running.  
* 16ppm is the print speed at warm-up. T and t1 change in proportion to the print speed.  
41388601TH Rev.2  
36 /  
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2.11 Paper Size Detection  
Via the cam tied to the paper guide of the paper cassette, the four tab pieces are driven according  
to the set position of the paper guide.  
Upon installation of the paper cassette, the microswitch detects the condition of the tab pieces and  
the paper size is recognized.  
PSZSW1 PSZSW2 PSZSW3 PSZSW4  
Without Cassette  
0
0
1
1
0
0
0
1
1
1
1
1
0
0
1
0
0
0
0
0
0
1
1
1
1
1
1
0
0
1
0
1
0
1
1
0
0
0
0
1
1
0
0
1
1
1
0
1
0
1
1
1
1
1
0
0
1
1
0
0
0
0
0
1
A3-Nobi  
Tabloid  
A3  
B4  
Regal 14"  
Regal 13"  
A4 in Portrait Orientation  
Letter in Portrait Orientation  
Executive  
B5 in Portrait Orientation  
Letter in Landscape Orientation  
A4 in Landscape Orientation  
A5  
B5 in Landscape Orientation  
A6  
41388601TH Rev.2  
37 /  
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2.12 Operation at Power-on  
2.12.1 Self-diagnostic test  
(1) Initial test  
The following checks are automatically performed at power-on.  
(a) ROM check  
(b) RAM check  
(c) EEPROM check  
(d) Flash ROM check  
(2) ROM check  
The ROM is checked by calculating a HASH value.  
(3) RAM check  
(a) Checking is conducted by RAM type. Out-of-specification RAM is judged as an error.  
(b) The order of mounted RAMs is checked. Out-of-standard RAM is judged as an error.  
(c) The RAM in each slot is checked by read-after-write operation.  
(4) EEPROM Check  
Specific data stored at the fixed EEPROM address is checked.  
(5) Flash ROM Check  
The flash ROM format is checked. Unformatted ROM is formatted after the read-after-write  
checking.  
(6) Option Unit Check  
Checking whether the option units (including a HDD, NIC, option trays and the duplex unit)  
are equipped with the printer is performed.  
41388601TH Rev.2  
38 /  
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2.13 Color Misalignment Detection  
Reflection-type optical sensors (Z71-PCB) are mounted at the right and left ends of the belt,  
respectively, in front of the toner scraping (cleaning) blade which is at the back of the belt unit. The  
color misalignment detection pattern is printed on the belt at the right and left ends each and, by  
reading the patterns by the reflection-type optical sensors, the misalignment amounts are  
measured with respect to Black to determine correction values. Then, the misalignment in main-  
scanning, sub-scanning and slanting directions is corrected.  
These operations are performed at power-on, at cover-close and every 400 pages.  
LED head  
C
C
M
M
Y
Y
K
K
ID  
Transfer  
belt  
Belt running direction  
Color alignment sensors L and R  
Cleaning blade  
Transfer Belt  
Color alignment sensor R  
Belt running direction  
Color alignment sensor L  
(Bottom View)  
Cleaning blade  
41388601TH Rev.2  
39 /  
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2.14 Version Read of Periodically Replaced Units  
The condition (new or used) of the I/D, fuser unit and belt unit are determined by an internal fuse  
within the units. When the unit is powered on or the upper cover is opened and closed, the  
printer scans for consumables fuses. If a conducting fuse is found, that unit's counter is reset  
and the fuse is opened. The life counters of the consumables are checked at each power on  
and each closing of the upper cover. Once a fuse is opened the consumable is judged used.  
2.15 Life Counter for Replaceable Units  
Each life of the periodically replaced units - I/D, fuse unit and belt unit is counted as shown in the  
following table:  
Unit Name  
Condition  
Action  
I/D  
The number of drum revolutions is counted in the unit of letter  
paper length + paper interval in continuous printing.  
End of Life: Time when a distance equivalent to pages of 26K is  
printed (on 3P/J).  
Warning (the unit can still be used).  
Toner Cartridge The number of dots printed is counted. The used amount is  
determined based on the counter value (See Section 2.16).  
End of Life: Time when a toner-low error occurs.  
Do not use the unit anymore.  
Belt Unit  
The number of turns revolutions is counted in the unit of letter  
paper length + paper interval in continuous printing.  
End of Life: Time when the counter value reaches 80K.  
Warning (the unit can still be used).  
Warning (the unit can still be used).  
Fuser Unit  
One is counted every time when one page is passed.  
End of Life: Time when the counter value reaches 80K.  
2.16 Toner Consumption Detection  
The used toner amount is detected by counting the number of dots printed.  
The counting starts after toner-low is released. The sum of the counted values is stored in  
EEPROM. When toner-low is detected, the amount used is forcedly set to 7%.  
When the equivalent of pages of 1K on A4 and 5% duty is reached after that, toner-empty is  
detected.  
41388601TH Rev.2  
40 /  
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3.  
PARTS REPLACEMENT  
This section describes the procedure for replacing the parts, assemblies and units in the field. The  
replacing procedure is given for detachment. To attach, use the reverse procedure.  
3.1 Precautions in Replacing Parts  
(1) Before replacing the parts, be sure to remove the AC cable and the interface cable.  
(a) To remove the AC cable, always use the following procedure.  
1 Flip the power switch of the printer off (to “O”).  
2 Pull the AC inlet plug of the AC cable out of the AC receptable.  
3 Remove the AC cable and the interface cable from the printer.  
(b) To connect the printer again, always use the following procedure.  
1 Connect the AC cable and the interface cable to the printer.  
2 Insert the AC inlet plug into the AC receptacle.  
3 Flip the power switch of the printer on (to “I”).  
Disconnect  
Connect  
(2) Do not disassemble the printer so long as it operates properly.  
(3) Minimize the disassembly. Do not detach parts other than those shown in the replacing  
procedure.  
(4) For maintenance applications, use designated tools.  
(5) Follow the order instructed to disassemble the printer. Incorrect order may damage the  
parts.  
(6) Small parts such as screws and collars tend to get lost, so temporarily replace them in  
their original positions.  
(7) When handling ICs and circuit boards such as microprocessors, ROMs and RAMs, do not  
use gloves that are likely to have static.  
(8) Do not place the printed circuit boards directly on the printer or the floor.  
41388601TH Rev.2  
41 /  
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[Maintenance Tools]  
Table 3-1 lists tools necessary to replace the units.  
Table 3-1 Maintenance Tools  
No.  
1
Service Tools  
Q' ty  
1
Place of use  
Remarks  
No. 1-100 Philips  
screwdriver  
2~2.5 mm screws  
2
3
4
5
6
No. 2-200 Philips  
screwdriver, Magnetized  
1
1
1
3~5 mm screws  
No. 3-100 screwdriver  
No. 5-200 screwdriver  
Digital multimeter  
Pliers  
1
1
Handy cleaner  
7
8
1
1
Cleans LED head  
LED Head cleaner  
P/N 4PB4083-2248P001  
9
1
High voltage probe  
41388601TH Rev.2  
42 /  
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3.2 Parts Layout  
Figure 3.1  
41388601TH Rev.2  
43 /  
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[Top Cover Assy]  
Figure 3.2  
41388601TH Rev.2  
44 /  
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[Printer Unit-1/2]  
Figure 3.3  
41388601TH Rev.2  
45 /  
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[Printer Unit-2/2]  
Figure 3.4  
41388601TH Rev.2  
46 /  
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[Cassette Guide Assy (L), (R)]  
Figure 3.5  
41388601TH Rev.2  
47 /  
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41388601TH Rev.2  
48 /  
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[Duplex Unit]  
D
C
B
A
D
C
E
B
E
A
Figure 3.6  
41388601TH Rev.2  
49 /  
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3.3 Replacing Parts  
This section describes how to replace the parts and assemblies illustrated below.  
41531301 41515110  
Print Engine Controller PWB (3.3.22)  
41502304 × 4  
LED Assy (3.3.2)  
40737401  
Power-Unit AC-DC Switching (115V) (3.3.34)  
40737501  
Power-Unit AC-DC Switching (230V) (3.3.34)  
40737601  
HV Power Supply (3.3.35)  
41531402, 41531404  
Fuser Unit (3.3.37)  
41531502  
Belt Unit (3.3.38)  
41178202  
Duplex Unit (3.3.39)  
41483102  
Printer Chassis (3.3.23)  
41483202  
41480901  
Printer NIP  
41483001  
Printer Unit  
40841302  
Fuser Latching Handle (L) (3.3.29)  
41628301  
Regist Roller Assy (A) (3.3.15)  
41483301  
Fuser Latching Handle Spring (3.3.29)  
40841601  
Regist Roller Assy (B) (3.3.16)  
41483401  
Entrance Sensor Actuator #1 (3.3.24)  
41578501  
Registration Motor Assy (3.3.17)  
41187101  
Entrance Sensor Actuator #2 (3.3.26)  
40841801  
Registration Clutch (3.3.17)  
41486601  
Entrance Sensor Actuator #3 (3.3.26)  
41621801  
Duplex Guide Assy (3.3.20)  
Registration Shutter Solenoid Assy  
41488801  
Registration Shutter  
41589401  
Registration Shutter Spring  
41641701  
Fuser Driver Gear-A (3.3.27)  
41095901  
41481001  
Unit-Lower-Frame (3.3.36)  
41481301  
Main Feed Assy (3.3.36)  
41515801  
PCE-Size Sence (3.3.36)  
22011000P0140  
IMSA-9714N-14A (3.3.36)  
41500101  
Insurator  
41483701  
Main Cooling Fan Assy (3.3.18)  
2381018P0001  
HV Tape Harness  
Fuser Exit Roller (3.3.27)  
4PP4043-4489P001  
Fuser Exit Roller Bushing (L) (3.3.27)  
4PP4076-3949P001  
Fuser Exit Roller Bushing (R) (3.3.27)  
41189701 × 4  
41490702  
Electrical Chassis Cooling Fan  
41484101  
Electrical Chassis (3.3.21)  
41483801  
Main Motor Assy (3.3.32)  
41483902  
Drum Contact Assy (3.3.14)  
41258301  
40841402  
Fuser Latching Handle (R) (3.3.31)  
41628301  
Belt Motor Assy (3.3.30)  
Entrance Sensor PWB (3.3.25)  
41491001  
Color Registration Sensor Assy (3.3.19)  
41073601  
Fuser Latching Handle Spring (3.3.31)  
40850201  
41489001  
Exit Sensor Assy (3.3.28)  
41483701  
Contact Assy (3.3.33)  
Plate Assy-Side (3.3.33)  
41493002  
Main Motor FAN Assy (3.3.27)  
Multipurpose Tray (3.3.13)  
41276502  
Rear Cover (3.3.12)  
41277402  
Left Side Cover (3.3.9)  
41481202  
Right Side Cover (3.3.7)  
41276402  
Front Cover (3.3.11)  
41277502  
Face Up Tray (3.3.10)  
41504401  
Top Cover  
40861001 × 8  
LED Assy Spring (3.3.2)  
41257902  
41484402  
Top cover (3.3.1)  
40866212  
LED Control PWB (Y71) (3.3.4)  
41349801  
Control panel Bezel (3.3.4)  
Stack Full Sensor (3.3.4)  
41349301 × 4  
Eject Roller (3.3.4)  
41484501  
41493002  
Multipurpose Tray Assy (3.3.13)  
41045802 × 2  
Link (3.3.13)  
Control Panel Assy (3.3.4)  
2381005P0015  
41486202  
MT Tray Cover Assy (3.3.13)  
41278002  
MT Top Cover (3.3.13)  
40325101  
Control Panel Tape Harness (3.3.4)  
41514101  
LED Harness K  
41514102  
LED Harness Y  
41514103  
LED Harness M  
41514104  
LED Harness C  
41328402  
41484902  
Cassette Assy (3.3.7)  
41277902  
Cover-Blind (3.3.7)  
41481701  
Feed-Roller (3.3.8)  
40863801  
MT Drive Gear (3.3.13)  
Plate-Side (3.3.21)  
Top Cover Handle (3.3.5)  
41277602  
Top Cover Latch (3.3.5)  
40861401 × 2  
Top Cover Latch Spring (3.3.5)  
41484701  
Eject Guide Assy (3.3.6)  
41388601TH Rev.2  
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3.3.1 Top cover  
(1) Open the top cover Assy.  
(2) Remove the nine screws 1 to detach the top cover 2.  
2
1
1
1
41388601TH Rev.2  
51 /  
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3.3.2 LED Assy/ LED Assy spring  
(1) Open the top cove 1.  
(2) Remove the three cables, and unhook the LED Assy 2 at the two places to demount it (The  
two springs 3 become detached together with the LED Assy 2).  
(3) Detach the LED connector 4.  
When assembling, attach the LED connector 4 to the LED head and insert the flat cable.  
1
3
4
3
4
2
41388601TH Rev.2  
52 /  
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3.3.3 Top cover unit  
(1) Remove the top cover (see section 3.3.1).  
(2) Remove the rear cover (see section 3.3.12).  
(3) Remove the front cover (see section 3.3.11).  
(4) Remove the electrical chassis (see section 3.3.21).  
(5) Unscrew the screws 1 and 2 to remove the limiters (F) 3 and (R) 4.  
(6) Remove the inner shaft 5, then the top cover unit 8 (The inner springs 6 and 7 become  
detached).  
8
2
7
1
5
4
6
2
1
3
41388601TH Rev.2  
53 /  
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3.3.4 Control panel Assy/ Control panel bezel/ LED control PWB/ Toner sensor/ Stack full sensor/  
Control panel tape harness/ Eject roller  
(1) Detach the control panel bezel 1.  
(2) Remove the screws 2 to demount the control panel 3.  
(3) Detach the control panel tape harness 4.  
(4) Remove the screws 6, unhook the connector 7 and demount the LED control PWB 8.  
(5) Unscrew the screws 9 to remove the plate 0.  
(6) Disengage the claw to demount the toner sensor A.  
(7) Demount the stacker full sensor B.  
(8) Unscrew the eject sensor bracket C, D.  
1
2
6
2
7
3
4
8
C
B
D
A
9
9
0
41388601TH Rev.2  
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3.3.5 Top cover handle/ Top cover latch/ Top cover latch spring  
(1) Remove the two screws 1 to detach the top cover handle 2 and disengage the top cover  
latch 3 (The two top cover latch springs 4 become detached).  
1
3
2
4
1
4
41388601TH Rev.2  
55 /  
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3.3.6 Eject guide Assy  
(1) Remove the seven screws 1 to detach the eject guide Assy 2.  
1
1
2
1
1
41388601TH Rev.2  
56 /  
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3.3.7 Cassette Assy/ Blind cover/ Side cover R Assy  
(1) Detach the cassette Assy 1.  
(2) Disengage the blind cover 2 at the two places to detach it.  
(3) Unscrew the two screws to remove the stopper 4.  
(4) Disengage the claw on the left support of the side cover R to detach the side cover R.  
4
5
5
2
1
3
5
5
41388601TH Rev.2  
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3.3.8 Feed rollers  
(1) Remove the cassette.  
(2) Unlatch and demount the feed rollers 1.  
1
1
1
41388601TH Rev.2  
58 /  
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3.3.9 Left side cover  
(1) Remove the four screws 1 to detach the left side cover 2.  
2
1
1
41388601TH Rev.2  
59 /  
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3.3.10 Face-up tray  
(1) Open the face-up tray in the arrow direction and move the links 2 out of engagement (at two  
places each of the links) to detach the face-up tray 1.  
2
1
2
41388601TH Rev.2  
60 /  
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3.3.11 Front cover  
(1) Open the top cover 1.  
(2) Disengage the claws and remove the blind cover 2.  
(3) Unscrew the six screws 4 to detach the front cover 3.  
1
4
4
4
4
3
4
2
41388601TH Rev.2  
61 /  
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3.3.12 Rear cover  
(1) Open the top cover 1,  
(2) Remove the five screws 3 and 4 to detach the rear cover 2.  
4
3
3
1
2
41388601TH Rev.2  
62 /  
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3.3.13 Multipurpose tray Assy/ Multipurpose tray cover Assy/ Links/ Multipurpose tray top cover/  
Multipurpose tray drive gear  
(1) Remove the rear cover (see section 3.3.12).  
(2) Remove the front cover (see section 3.3.11).  
(3) Unscrew the three screws 1 to detach the multipurpose tray top cover 2.  
(4) Unscrew the two screws 3 and remove the connector to detach the multipurpose tray 4.  
(5) Disengage 4 and 5 to detach the multipurpose tray cover Assy 5 (the links 7 become  
detached).  
(6) Unhook and detach the multipurpose tray drive gear 8.  
1
8
2
1
4
6
5
3
8
Engagement  
6
5
3
Engagement  
41388601TH Rev.2  
63 /  
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3.3.14 Drum contact Assys  
(1) Insert a flatblade screwdriver between the printer case and the drum contact Assy 1 to  
demount the drum contact Assy.  
1
41388601TH Rev.2  
64 /  
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3.3.15 Registration roller Assy (A)/ Registration drive gear (A)  
(1) Remove the front cover (see section 3.3.11).  
(2) Remove the rear cover (see section 3.3.12).  
(3) Remove the multipurpose tray (see section 3.3.13).  
(4) Unscrew the four screws 1 to demount the registration roller Assy (A) 2.  
(5) Remove the E ring 3 to detach the registration gear (A) 4.  
1
3
4
2
1
41388601TH Rev.2  
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3.3.16 Registration roller Assy (B)  
(1) Remove the cassette Assy.  
(2) Remove the front cover (see section 3.3.11).  
(3) Remove the rear cover (see section 3.3.12).  
(4) Remove the electrical chassis (see section 3.3.21).  
(5) Remove the registration clutch (see section 3.3.17).  
(6) Remove the printer chassis (see section 3.3.23).  
(7) Unscrew the four screws and pull out the registration Assy (B) 2 in the arrow direction.  
1
2
1
1
41388601TH Rev.2  
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3.3.17 Registration clutch, Registration motor Assy  
(1) Remove the left side cover (see section 3.3.9).  
(2) Remove the electrical chassis (see section 3.3.21).  
(3) Remove the connector and the E ring 1, then screws 3 and 4, and then the earth plate 5.  
(4) Removetheconnectorandunscrewthetwoscrews6todemounttheregistrationmotorAssy  
7.  
6
3
7
5
4
6
2
1
41388601TH Rev.2  
67 /  
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3.3.18 Cooling fan  
(1) Unhook the connector 1, and remove the screws 2 and the cooling fan 3.  
1
2
3
air direction  
41388601TH Rev.2  
68 /  
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3.3.19 Color registration sensor Assy  
(1) Remove the two screws 1 and the three connectors to demount the color registration sensor  
Assy 2.  
(2) Remove the earth plate B 3.  
1
1
2
1
3
2
4
41388601TH Rev.2  
69 /  
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3.3.20 Duplex guide Assy  
(1) Unlatch and demount the duplex guide Assy 1.  
(2) Remove the springs 2.  
1
2
2
Main chassis (L side)  
41388601TH Rev.2  
70 /  
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3.3.21 Electrical chassis/ Electrical chassis cooling fan  
(1) Unscrew the five screws 1 and two screws 2 to remove the plate A 3.  
(2) Unscrew the thirty-one screws 4 to remove the shield plate B 5.  
(3) Remove the printer engine controller PWB (see section 3.3.22).  
(4) Unscrew the eleven screws 6 to detach the electrical chassis 7.  
(5) Unscrew the two screws 8 to demount the electrical chassis cooling fan 9.  
1
1
3
2
1
6
6
7
4
6
9
air direction  
8
6
6
5
4
41388601TH Rev.2  
71 /  
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3.3.22 Printer engine controller PWB  
(1) Remove the rear cover (see section 3.3.12).  
(2) Remove the electrical chassis and the electrical cooling fan (see section 3.3.21).  
(3) Remove the five screws 1 and all the connectors to demount the printer engine controller  
PWB 2.  
2
1
1
41388601TH Rev.2  
72 /  
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3.3.23 Printer unit chassis  
(1) Unscrew the screw 1 and remove the AC switch Assy 2.  
(2) Remove the four black screws 3 and six screws 4 to detach the printer unit chassis 5.  
3
4
3
4
4
4
2
3
3
1
4
3
5
41388601TH Rev.2  
73 /  
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3.3.24 Entrance cassette sensor actuator  
(1) Remove the printer unit chassis (see section 3.3.23).  
(2) Turn over the main chassis.  
(3) Remove the two clamps with tweezers to demount the entrance cassette sensor actuator 1.  
1
Main chassis  
41388601TH Rev.2  
74 /  
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3.3.25 Entrance sensor PWB  
(1) Remove the registration roller Assy (B) (see section 3.3.16).  
(2) Remove the two screws 1 to demount the entrance sensor PWB 2.  
1
2
41388601TH Rev.2  
75 /  
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3.3.26 Entrance MT sensor actuator and Entrance belt sensor actuator  
(1) Remove the entrance sensor PWB (R71) (see section 3.3.25).  
(2) Unlatch and detach the entrance MT sensor actuator 1.  
(3) Unlatch and detach the entrance belt actuator 2.  
2
1
41388601TH Rev.2  
76 /  
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3.3.27 Main motor fan/ Fuser eject roller  
(1) Unscrew the two screws 1 to remove the fan Assy 2.  
(2) Unscrew the fuser eject roller contact 4.  
(3) Remove the fuser drive gear 5.  
(4) Unscrew the fuser drive gear Assy 8.  
(5) Remove the screws and washers 0 to demount the fan A.  
(6) Unlatch and detach the fuser eject roller bearing (L) B and fuser eject roller C.  
9
0
A
C
9
0
B
8
5
4
2
3
7
1
1
41388601TH Rev.2  
77 /  
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3.3.28 Eject sensor Assy  
(1) Remove the fuser eject roller (see section 3.3.27).  
(2) Remove the screw 1 and connector 2 to demount the (red/blue) eject sensor Assy 2.  
1
2
41388601TH Rev.2  
78 /  
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3.3.29 Fuser latching handle (L)  
(1) Remove the latching handle spring 1.  
(2) Unscrew the fuser latching handle (L) 3.  
3
1
2
41388601TH Rev.2  
79 /  
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3.3.30 Belt motor Assy  
(1) Remove the fuser latching handle (R) (see section 3.3.32).  
(2) Unscrew the two screws 1 to detach the two connector 2.  
(3) Demount the belt motor Assy 3.  
1
1
3
2
41388601TH Rev.2  
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3.3.31 Fuser latching handle (R)  
(1) Remove the printer unit chassis (see section 3.3.23).  
(2) Remove the E ring 1.  
(3) Remove the fuser latching handle spring 2 to detach the fuser latching handle (R) 3.  
3
1
2
41388601TH Rev.2  
81 /  
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3.3.32 Main motor Assy  
(1) Remove the belt motor Assy (see section 3.3.30).  
(2) Remove all the connectors.  
(3) Remove the two screws 1 to demount the main motor Assy 2.  
1
1
2
41388601TH Rev.2  
82 /  
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3.3.33 Contact Assy/ Side plate Assy  
(1) Remove the printer unit chassis (see section 3.3.23).  
(2) Remove the four screws 1 to detach the side plate Assy 2.  
(3) Remove the three screws 3 to detach the contact Assy 4.  
3
2
1
4
41388601TH Rev.2  
83 /  
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3.3.34 Low voltage power supply  
(1) Remove the printer unit chassis (see section 3.3.23).  
(2) Unhook the connector 1.  
(3) Remove the eight screws 2 to demount the low voltage power supply 5.  
2
8
7
1
6
3
2
5
2
0
0
0
B
A
9
41388601TH Rev.2  
84 /  
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3.3.35 High voltage power supply  
(1) Remove the contact Assy (see section 3.3.33).  
(2) Unhook the connector of the high voltage power supply 2.  
(3) Remove the two screws 1 to detach the high voltage power supply 2 and the tape harness  
3.  
1
3
1
2
41388601TH Rev.2  
85 /  
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3.3.36 Main feed Assy  
(1) Remove the printer unit chassis (see section 3.3.23).  
(2) Remove the low voltage power supply and high voltage power supply (see sections 3.3.34  
and 3.3.35).  
(3) Unscrew the five screws 1 to remove the lower plate 2.  
(4) Unscrew the six screws 3 to demount the main feed Assy 4.  
(5) Unscrew the screws 5 to detach the cable and then the PCB size board 6.  
(6) Unscrew the screw 7 to detach the duplex connector 8.  
(7) Unscrew the screws 9 to detach the second tray connector 0.  
1
1
2
8
7
6
5
0
4
9
3
3
41388601TH Rev.2  
86 /  
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3.3.37 Fuser unit  
(1) Open the top cover 1.  
(2) Push the right and left fuser levers (blue) 2 in the arrow direction to detach the fuser unit 3.  
3
2
41388601TH Rev.2  
87 /  
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3.3.38 Belt unit  
(1) Open the top cover 1.  
(2) Remove the I/D unit.  
(3) Push the lever (blue) 2 in the arrow direction, raise the handle (blue) and detach the belt unit  
3.  
3
1
2
41388601TH Rev.2  
88 /  
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3.3.39 Duplex unit  
(1) Remove the cassette Assy, the front cover and the front cover inner buffle.  
(2) Unlatch the rear at the right and left and pull the duplex unit 1 toward the front.  
4
5
2
3
1
41388601TH Rev.2  
89 /  
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3.3.40 CU Assy  
(1) Pulling out Control Board  
1. Loosen the two screws 1.  
2. Pull the control board 2 out.  
3. Place the control board 2 on a flat table.  
(2) Detaching Fan  
1. Remove the connector 3.  
2. Remove the two screws 4.  
3. Detach the fan 5.  
1
2
1
4
5
3
41388601TH Rev.2  
90 /  
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(3) Demounting CRM Board  
1. Remove the three screws 6 to detach the fan bracket 7.  
2. Remove the four screws 8 to detach the plate support 9 and the guide rail 0.  
3. Remove the two screws A to detach the guide rail B.  
4. Remove the two screws C and three screws D, then demount the CRM board E.  
6
7
8
6
9
A
E
8
D
0
9
8
D
B
8
A
0
C
8
41388601TH Rev.2  
91 /  
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4.  
ADJUSTMENT  
Adjustments are carried out by key operations on the operator panel.  
The maintenance menu is included in the general menu of this printer. Choose the maintenance  
menu for adjustment.  
4.1 Maintenance Menu and Its Functions  
The general menu has the category, MAINTENANCE MENU.  
The items adjustable in this menu are shown below.  
Maintenance Menu  
DF  
*
Category  
Item(1st Line)  
Functions  
Value(2nd Line)  
MAINTENANCE MENU Power Save Mode  
Sets the Power Save Mode  
Enabled  
Disabled  
enabled/disabled. The shift time to  
enable the Power Save mode can  
be changed according to the  
POWER SAVE SHIFT TIME item of  
SYSTEM CONFIG MENU.  
Normal Paper Black  
Setting  
Implements fine adjustment of  
BLACK printing on normal paper  
when unclear characters or spots  
are often found on print results.  
With dispersed or snowed printing  
in the part at high-density, decrease  
the value. With unclear printing,  
increase the value.  
0
*
*
*
*
+1  
+2  
-2  
-1  
Normal Paper Color  
Setting  
Implements fine adjustment of  
COLOR printing on normal paper  
when unclear characters or spots  
are often found on the print result.  
With dispersed or snowed printing  
in the part at high-density, decrease  
the value. With unclear printing,  
increase the value.  
0
+1  
+2  
-2  
-1  
Transparency Black  
Setting  
Implements fine adjustment of  
BLACK printing on Transparency  
when unclear characters or spots  
are often found on the print result.  
With dispersed or snowed printing  
in the part at high-density, decrease  
the value. With unclear printing,  
increase the value.  
0
+1  
+2  
-2  
-1  
Transparency Color  
Setting  
Implements fine adjustment of  
COLOR printing on Transparency  
when unclear characters or spots  
are often found on the print result.  
With dispersed or snowed printing  
in the part at high-density, decrease  
the value. With unclear printing,  
increase the value.  
0
+1  
+2  
-2  
-1  
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4.2 Short Plug Settings  
The CRM board has five short plugs that can be set as follows:  
Short Plug (WE1,3, 5 and 7)  
Sets flash ROM DIMM to connect WE signals.  
(1-2 Short: Disconnects WE signals; 2-3 Short: Connects WE signals.)  
The factory-shipped short plug is set to the 2-3 short: Re-programmable the Flash ROM DIMM.  
Short Plug (DIMM2)  
Sets the banks of ROM DIMM Slot B.  
(1-2 Short: For 1-Bank DIMM; 2-3 Short: For 2-Bank DIMM)  
1-bank DIMM (dual-sided 1 bank) is only a prototype and does not exist in production-run  
printers.  
4.3 Printing Singly Using Controller-Equipped Printer  
Menu Map Printing  
Prints the program versions, controller block, and other printer configuration and settings.  
Operation: (Press of Switch)  
Without HDD: “0” “3” “3”  
With HDD: “0” “0” “3” “3”  
File List Printing  
Prints a list of files stored on a HDD or in ROM.  
Operation: (Press of Switch)  
Without HDD: “0” “3” “1” “3”  
With HDD: “0” “0” “3” “1” “3”  
Font List Printing (PCL)  
Prints a list of PCL fonts.  
Operation: (Press of Switch)  
Without HDD: “0” “3” “1” “1” “3”  
With HDD: “0” “0” “3” “1” “1” “3”  
Font List Printing (PS)  
Prints a list of PS fonts.  
Operation: (Press of Switch)  
Without HDD: “0” “3” “1” “1” “1” “3”  
With HDD: “0” “0” “3” “1” “1” “1” “3”  
Demo Printing  
Prints the demo patterns for destinations.  
Operation: (Press of Switch)  
Without HDD: “0” “3” “1” “1” “1” “1” “3”  
With HDD: “0” “0” “3” “1” “1” “1” “1” “3”  
Ethernet Board Self-Diagnostic Printing  
When equipped with an Ethernet board, the printer runs diagnostic checks on itself by holding  
the SW on the Ethernet board down for two seconds or more, and prints the results.  
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4.4 Adjustment after Part Replacement  
Adjustment to be implemented after each part replacement is described below.  
Adjustment and correction of color registration are always required for each part replacement.  
Replaced Part  
LED Head  
Adjustment  
Color balance adjustment  
Not required.  
Drum Cartridge (Y, M, C, K)  
Fuser Unit  
Not required.  
Belt Cassette Assy  
PU (K73 Board)  
Not required.  
Re-mounting the EEPROM used prior to the replacement *Note  
*Note: When the EEPROM of the PU (K73 Board) is replaced to a new one, color balance must be  
adjusted.  
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4.5 Color Balance Adjustment  
Color balance has been adjusted appropriately when a printer is shipped from the plant. However,  
it may be out of the appropriate balance during use. In such a case, color balance should be  
modified.  
Note: Density of each color depends on each other. Therefore, adjustment must be repeated  
several times to reach the correct color balance.  
(1) Set letter paper in the tray specified on the operator panel.  
(2) Press ) several times to display [COLOR MENU].  
(3) Press 1 or 5 to display [COLOR BALANCE CORRECTION/PATTERN PRINT].  
(4) Press 3 to start test printing.  
(5) Press 1 to display [COLOR BALANCE CORRECTION/RESET].  
(6) Choose the number of the color closest to the [(] part on the test pattern.  
If the selected color is [00], the color balance is correct and no adjustment is required.  
If it is not [00], the color balance should be adjusted in the procedures below.  
(7) Press 2 or 6 several times to display the value selected in Step (6).  
(8) Press 3 to start test printing.  
(9) Repeat the steps (6)~(8) to approximate the color at the [(] part on the test pattern to [00]  
as much as possible.  
(10) Press 4 to display [ON LINE].  
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4.6 EEPROM Replacement after CRM Board and K73 Board Replacement  
When replacing the CRM Board or K73 Board, the EEPROM must be removed and re-mounted  
on the new board (to deliver the user setting and font installation information to the new board).  
If the EEPROM used by the user is broken and not suitable for further use, the EEPROM on the  
new board may be used.  
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5.  
REGULAR MAINTENANCE  
5.1 Consumables to be Regulary Replaced  
It is recommended that a user should replace the consumables below according to the  
replacement standard. (If not replaced, print quality is not assured or it may result in a failure.)  
Part Name  
Large-capacity When the message “Toner Low” After 15,000 copies have Replace the Toner cartridge.  
Toner Cartridge is displayed. been printed.  
Time for Replacement  
Replacement Condition Adjustment after Replacement  
ID Cartridge  
Fuser Unit  
Belt Unit  
When the message “Drum Life” After 26,000 copies have Reset the drum counter  
is displayed. been printed. (at 3P/J) after drum replacement.  
When the message “Fuser Life” After 80,000 copies have Reset the fuser counter.  
is displayed. been printed.  
When the message “Belt Life” is After 80,000 copies have Reset the belt counter.  
displayed. been printed. (at 3P/J)  
The above consumables replacement may be performed by a user.  
5.2 Cleaning  
Theinsideandoutsideofthisprintershouldbecleanedwithahandvacuumcleaner,ifnecessary.  
Note: Do not touch the Image drum terminal, LED lens array and LED head connectors.  
5.3 Cleaning of LED Lens Array  
When a longitudinal white band or stripes (that is, void or light printing) appear on a printed paper  
surface, the LED lens array should be cleaned.  
Note: The LED head cleaner must be used to clean the LED lens array. (The LED head cleaner  
is included in the Toner cartridge box.)  
White band, white stripes  
(Void or light printing)  
5.4 Cleaning of Pick-up Roller  
When papers are not fed normally, the Pick-up roller should be cleaned.  
Note: Clean it with a soft cloth and alcohol. Be cautious not to damage the roller surface.  
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6.  
TROUBLESHOOTING PROCEDURES  
6.1 Tips for Troubleshooting  
(1) Check the basic check points covered in the user’s manual.  
(2) Gather as much information on the problem from the customer as possible.  
(3) Perform inspections in conditions close to those in which the problem had occurred.  
6.2 Check Points before Correcting Image Problems  
(1) Is the printer being run in proper ambient conditions?  
(2) Have the consumables toner and image drum cartridges been replaced properly?  
(3) Is the paper normal? See paper specifications section.  
(4) Has the image drum cartridge been loaded properly?  
6.3 Tips for Correcting Image Problems  
(1) Do not touch, or bring foreign matter into contact with the image drum surface.  
(2) Do not expose the image drum to direct sunlight.  
(3) Keep hands off the fuser unit as it is heated during operation.  
(4) Do not expose the image drum to light for longer than 3 minutes at room temperature.  
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6.4 Preparation for Troubleshooting  
(1) Operator panel display  
The failure status of this printer is indicated on the LCD (liquid crystal display) of the Operator  
panel.  
Take the proper corrective action according to the message displayed on the LCD.  
6.5 Troubleshooting Flow  
If a problem should develop in this printer, troubleshoot in the following procedure.  
Problem  
Problem that results  
in LCD message  
indication  
Troubleshoot based on the  
LED message list.  
See 6.5.1.  
Perform troubleshooting  
with the troubleshooting  
flow chart. See 6.5.2.  
Image problem  
Perform troubleshooting  
with the troubleshooting  
flow chart. See 6.5.3.  
(and a problem that  
does not result in LCD  
message indication.)  
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6.5.1 LCD Message List  
The printer indicates a Service Call Error message on the LCD as shown below, detecting an  
unrecoverable error.  
Service Call  
nnn : Error  
Note: nnn is an error code.  
When the Service Call message is displayed, the error information corresponding to the error code  
appears on the lower line of the LCD. The meaning and solutions of each error code are listed in  
the Table 6-1-1.  
Table 6-1-1 Operator Alarms (1/5)  
Message  
Cause  
Error Description  
Solutions  
Service Call CPU Exception  
001: Error  
~
Is the error message displayed again?  
Is the error message displayed again?  
Yes Turn the printer off/on.  
Replace the CRM board.  
Yes  
(The EEPROM needs replacement.)  
011: Error  
Service Call CU ROM Hash  
Is the program ROM DIMM installed  
properly?  
No Re-install the program ROM DIMM.  
020: Error  
Check Error 1  
Can the printer recover from the error by  
replacing the program ROM DIMM?  
Yes Replace the program ROM DIMM.  
No Replace the CRM board.  
(The EEPROM needs replacement.)  
Service Call CU Slot1 DIMM  
030: Error  
Is the concerned RAM DIMM installed  
properly?  
Can the printer recover from the error by  
replacing the RAM DIMM?  
No Re-install the concerned RAM DIMM.  
Yes Replace the RAM DIMM.  
No Replace the CRM board.  
RAM Check Error  
(The EEPROM needs replacement.)  
Service Call CU Slot2 DIMM  
031: Error  
Is the concerned RAM DIMM installed  
properly?  
Can the printer recover from the error by  
replacing the RAM DIMM?  
No Re-install the concerned RAM DIMM.  
Yes Replace the RAM DIMM.  
No Replace the CRM board.  
RAM Check Error  
(The EEPROM needs replacement.)  
Service Call CU Slot3 DIMM  
032: Error  
Is the concerned RAM DIMM installed  
properly?  
Can the printer recover from the error by  
replacing the RAM DIMM?  
No Re-install the concerned RAM DIMM.  
Yes Replace the RAM DIMM.  
No Replace the CRM board.  
RAM Check Error  
(The EEPROM needs replacement.)  
Service Call CU Slot4 DIMM  
033: Error  
Is the concerned RAM DIMM installed  
properly?  
No Re-install the concerned RAM DIMM.  
Yes Replace the RAM DIMM.  
RAM Check Error  
Can the printer recover from the error by  
replacing the RAM DIMM?  
No Replace the CRM board.  
(The EEPROM needs replacement.)  
Service Call RAM Configuration  
Is the installation order followed?  
No Correct the installation order.  
Yes Replace the RAM DIMMs.  
No Replace the CRM board.  
(The EEPROM needs replacement.)  
034: Error  
Error.  
The CU RAM  
installation or  
derwas not followed.  
Can the printer recover from the error by  
replacing the RAM DIMMs?  
Service Call Slot1 RAM Spec Error. Is the RAM DIMM a genuine part?  
No Use a genuine RAM DIMM.  
No Re-install the concerned RAM DIMM.  
Yes Replace the RAM DIMM.  
035: Error  
Is the concerned RAM DIMM installed  
The CU RAM Slot1  
DIMM specification  
is not supported.  
properly?  
Can the printer recover from the error by  
replacing the RAM DIMM?  
No Replace the CRM board.  
(The EEPROM needs replacement.)  
Service Call Slot2 RAM Spec Error. Is the RAM DIMM a genuine part?  
No Use a genuine RAM DIMM.  
No Re-install the concerned RAM DIMM.  
Yes Replace the RAM DIMM.  
036: Error  
Is the concerned RAM DIMM installed  
The CU RAM Slot2  
DIMM specification  
is not supported.  
properly?  
Can the printer recover from the error by  
replacing the RAM DIMM?  
No Replace the CRM board.  
(The EEPROM needs replacement.)  
Slot3 RAM Spec Error. Is the RAM DIMM a genuine part?  
No Use a genuine RAM DIMM.  
No Re-install the concerned RAM DIMM.  
Yes Replace the RAM DIMM.  
Service Call  
037: Error  
Is the concerned RAM DIMM installed  
properly?  
The CU RAM Slot3  
DIMM specification  
is notsupported.  
Can the printer recover from the error by  
replacing the RAM DIMM?  
No Replace the CRM board.  
(The EEPROM needs replacement.)  
Is the RAM DIMM a genuine part?  
Is the concerned RAM DIMM installed  
properly?  
Can the printer recover from the error by  
replacing the RAM DIMM?  
No Use a genuine RAM DIMM.  
No Re-install the concerned RAM DIMM.  
Yes Replace the RAM DIMM.  
Service Call  
038: Error  
Slot4 RAM Spec Error.  
The CU RAM Slot4  
DIMM specification  
is notsupported.  
No Replace the CRM board.  
(The EEPROM needs replacement.)  
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Table 6-1-1 Operator Alarms (2/5)  
Error Description  
Message  
Cause  
Solutions  
CU EEPROM Error  
Service Call  
040: Error  
Can the printer recover from the error by  
replacing the EEPROM on the CU board?  
Yes Replace the EEPROM. (Settings of the  
user must be restored on the new.)  
No Replace the CRM board.  
(The EEPROM needs replacement.)  
U Flash Error.  
On-CU-board Flash  
ROM Error  
Service Call  
041: Error  
Does the error message appear again?  
Does the error message appear again?  
Yes Replace the CRM board.  
(The EEPROM needs replacement.)  
Operator Panel Error  
Service Call  
050: Error  
Yes See the flowchart for the problems with  
no LCD message displayed.  
CU Fan Error.  
Service Call  
051: Error  
Is the on-CU-board connector connected  
properly?  
No Connect the connector properly.  
On-CU-board CPU  
Cooling Fan  
Problem  
Can the printer recover from the error by  
replacing the fan?  
Yes Replace the fan.  
No Replace the CRM board.  
(The EEPROM needs replacement.)  
Network Comm.Error.  
CU ~ NIC H/W I/F  
Problem  
Service Call  
063: Error  
Is the network board installed properly?  
No Install the network board properly.  
Yes Replace the network board.  
Can the printer recover from the error by  
replacing the network board?  
No Replace the CRM board.  
(The EEPROM needs replacement.)  
CANT_HAPPEN.  
PS F/W Problem  
Detection  
Service Call  
070: Error  
Is it recovered by turning the printer off/on.  
No Replace the CRM board.  
(The EEPROM needs replacement.)  
Engine Communication  
Error  
Service Call  
072: Error  
Is the CU Assy installed properly?  
No Install the CU Assy properly.  
Can the printer recover from the error by  
replacing the CRM board?  
Yes Replace the CRM board.  
PU ~ CU I/F Error  
(The EEPROM needs replacement.)  
No Replace the PU board.  
Video Overrun  
Detect  
Service Call  
073: Error  
~
Is the CU Assy installed properly?  
No Install the CU Assy properly.  
Can the printer recover from the error by  
replacing the CRM board?  
Yes Replace the CRM board.  
(The EEPROM needs replacement.)  
075: Error  
Error detected at Engine  
ROM Checksum when  
turned on.  
Service Call  
Does the error repeat?  
Does the error repeat?  
Does the error repeat?  
Does the error repeat?  
No EEPROM?  
No Replace the PU board.  
100/100:Error  
Yes Replace the engine control board (K73).  
Error detected at Engine  
RAM Read/Write when  
turned on.  
Service Call  
102: Error  
Yes Replace the engine control board (K73).  
Yes Replace the engine control board (K73).  
Yes Replace the engine control board (K73).  
Error detected at Engine  
SRAM Read/Write when  
turned on.  
Service Call  
103: Error  
Error detected at Engine  
EEPROM Checksum  
when turned on.  
Service Call  
104: Error  
EEPROM not detected  
when turned on.  
Service Call  
105: Error  
Yes Confirm the existence of EEPROM.  
Without it, mount an EEPROM.  
Does the error repeat?  
Does the error repeat?  
Yes Replace the engine control board (K73).  
Yes Replace the engine control board (K73).  
Error detected at Engine  
Control Logic.  
Service Call  
106: Error  
Service Call Error detected at the  
1) Is the error message displayed?  
Yes Turn off/on the printer.  
120: Error  
~
122: Error  
Power unit cooling fan in  
the Controller cavity.  
Yes  
Yes  
2) Does the error repeat?  
Replace the Fan motor.  
Turn off/on the printer.  
Service Call Inappropriate ambient  
1) Is the error message displayed?  
123: Error  
RH detected by a  
sensor.  
2) Does the error repeat?  
Yes Replace the RH sensor.  
Turn off/on the printer.  
Yes  
Service Call  
124: Error  
1) Is the error message displayed?  
Inappropriate ambient  
temp. detected by a  
sensor.  
2) Does the error repeat?  
Yes Replace the temperature sensor.  
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Table 6-1-1 Operator Alarms (3/5)  
Error Description  
Message  
Cause  
Solutions  
Yes Turn off/on the printer.  
Service Call Error detected at the  
125: Error MT home position.  
1) Is the error message displayed?  
2) Does the error repeat?  
Yes Replace the MT.  
Service Call Temperature rise at  
1) Is the error message displayed?  
Yes Turn off the printer, leave it for 30 min and  
then turn it on again.  
130: Error  
the LED head  
detected.  
2) Does the error repeat?  
Yes Replace the LED head unit.  
Service Call No LED head unit  
1) Is the error message displayed?  
2) Is the LED head mounted properly?  
3) Does the error repeat?  
Yes Verify the installation of the LED head.  
Yes Turn off/on the printer.  
131: Error  
~
detected when  
turning on the printer  
or closing the cover.  
Yes Replace the LED head Assy.  
134: Error  
Service Call Error detected with  
1) Is the error message displayed?  
Yes Turn off/on the printer.  
Yes Replace the Drum Assy.  
140: Error  
~
the D located at  
appropriate position.  
2) Does the error repeat?  
142: Error  
Service Call Fuse in the ID unit  
Is the ID unit mounted properly?  
Yes Confirm the cable connection, or  
replace the Engine board.  
150: Error  
~
has not been blown.  
153: Error  
Yes  
Service Call Fuse in the Belt unit  
154: Error has not been blown.  
Is the Belt unit mounted properly?  
Confirm the cable connection, or  
replace the Engine board.  
Service Call Fuse in the Fuser unit Is the Fuser unit mounted properly?  
155: Error  
Yes Confirm the cable connection, or  
replace the Engine board.  
has not been blown.  
Service Call Error detected by  
1) Is the error message displayed?  
Yes Replace Toner sensor or Assy  
(Y71-PWB).  
160: Error  
~
Toner sensor.  
2) Does the error repeat?  
Yes Same as the above.  
Yes Turn off/on the printer.  
163: Error  
Service Call  
170: Error  
171: Error  
174: Error  
175: Error  
Short or open circuit  
detected at the Fusert  
hermistor. (H or L  
1) Is the error message displayed?  
2) Does the error repeat?  
Yes Replace the Thermistor and turn off the  
printer. Leave it for 30 min.  
temperature error)  
Service Call High temperature  
1) Is the error message displayed?  
2) Does the error repeat?  
Yes Turn off/on the printer.  
172: Error  
176: Error  
error detected at  
Thermistor.  
Yes Replace the Thermistor and turn off the  
printer. Leave it for 30 min.  
Service Call Low temperature  
1) Is the error message displayed?  
2) Does the error repeat?  
Yes Turn off/on the printer.  
173: Error  
177: Error  
error detected at  
Thermistor.  
Yes Replace the Thermistor or heater and  
turn off the printer.  
Service Call Communication  
1) Is the error message displayed?  
Yes Turn off/on the printer.  
181: Error  
~
186: Error  
failure with an option  
unit detected by  
Engine  
2) Does the error repeat?  
1) Is the Top cover open?  
Yes Replace the option unit.  
Yes Close the Top cover.  
Printer engine cover  
is open.  
Close Cover  
310: CCCC  
CoverOpen  
(* = A4, B4 etc.)  
2) Does the Cover switch operatenormally? Yes Close the Side cover.  
No Replace the Cover switch.  
No Fuser unit detected  
when turning on the  
printer or closing the  
cover.  
Check Fuser  
320:  
Fuser Error  
1) Is the error message displayed?  
Yes Confirm the existence of the unit.  
2) Is the Fuser unit mounted properly?  
No Re-install the Fuser unit and turn off/on  
the printer.  
3) Does the error repeat?  
Yes Replace the Fuser unit Assy.  
No Belt unit detected  
when turning on the  
printer or closing the  
cover.  
Check Belt  
330:  
Belt Error  
1) Is the error message displayed?  
2) Is the Belt unit mounted properly?  
Yes Confirm the existence of the unit.  
No Re-install the Belt unit and turn off/on  
the printer.  
3) Does the error repeat?  
Yes Replace the Belt unit Assy.  
No ID unit detected  
when turning on the  
printer or closing the  
cover.  
Check Drum  
340~343:  
Drum Error  
1) Is the error message displayed?  
2) Is the ID unit mounted properly?  
Yes Confirm the existence of the unit.  
No Re-install the ID unit and turn off/on the  
printer.  
Yes Replace the ID unit Assy.  
3) Does the error repeat?  
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Table 6-1-1 Operator Alarms (4/5)  
Error Description  
Message  
Cause  
Solutions  
End of the ID unit life.  
26,000 or more  
copies printed.  
Install New Drum  
350: Y Drum Life  
351: M Drum Life  
352: C Drum Life  
353: K Drum Life  
Is it displayed soon after the ID unit  
replacement?  
Yes Confirm the life of the ID unit.  
No Replace the ID unit.  
The Duplex unit is  
removed from the  
printer.  
Install Duplex Unit  
360: No Duplex  
unit  
Recovered if the Duplex unit is inserted  
again?  
Yes Normal  
No Replace the Duplex unit or Engine board.  
Paper jam detected  
after paper reverse in  
the Duplex unit.  
Check DUPLEX  
370: Paper Jam  
1) Is a paper jammed in the Duplex unit?  
Yes Remove the jammed paper.  
No Check the Duplex unit, or replace it.  
Paper jam detected  
at the Duplex unit  
Check DUPLEX  
371: Paper Jam  
1) Is a paper jammed in the Duplex unit?  
1) Does misfeed occur in the Duplex unit?  
Yes Remove the jammed paper.  
No Check the Duplex unit, or replace it.  
Paper jam detectedd  
uring paper feed  
from the Duplex unit.  
Check DUPLEX  
372: Paper Jam  
Yes Remove the misfed paper and close  
the cover.  
No Check the Duplex unit, or replace it.  
Paper jam during  
paper feed from the  
Cassette 1, 2, 3, 4 or 5.  
Open Side Cover  
380: Paper Jam  
1) Does misfeed occur in the specified  
cassette?  
Yes Remove the jammed paper and install  
the cassette.  
No Check the Cassette 1, 2, 3, 4 or 5, or  
replace it.  
Paper jam detected  
btwn the B ID and  
Fuser.  
Open Stacker  
Cover  
381: Paper Jam  
1) Is a paper jammed between the Y ID and Yes Remove the jammed paper.  
Fuser?  
2) Is the load on the Fuser unit normal?  
No Replace the Fuser unit.  
Paper jam detected in  
the Fuser unit or btwn  
the Fuser and paper  
ejection.  
Open Stacker  
Cover  
382: Paper Jam  
1) Is a paper jammed in the Fuser unit or  
between the Y ID and Fuser unit?  
Yes Remove the jammed paper.  
2) Is the Paper eject switch work normally? No Replace the Fuser unit.  
Paper jam detected  
on paper entering  
the Duplex unit.  
Open Stacker  
Cover  
383: Paper Jam  
1) Is a paper jammed at the entrance of the Yes Remove the jammed paper and close.  
Duplex unit or in the unit?  
No Check the Duplex unit, or replace it.  
Paper jam during  
paper feed from the  
MP Tray.  
Check MP Tray  
390: Paper Jam  
1) Does misfeed occur around the MP Tray? Yes Remove the misfed paper and close the  
cover.  
No Check the MP Tray, or replace it.  
Check Tray *  
391~395: Paper btwn a cassette and  
Paper jam detected  
1) Is a paper jammed around the cassette  
or between the B ID and cassette.  
Yes Remove the jammed paper.  
Jam  
the B ID.  
2) Does the Paper entry switch operate  
normal?  
No Replace the Paper entry switch.  
Open Stacker  
Cover  
400: Paper Size the specification  
Paper in a size different 1) Is the paper in a custom size?  
Yes No action required.  
(45 mm or more) from  
2) Is the paper in the standard size?  
Yes Adjust the Paper size guide of the  
cassette.  
Error  
detected at the Printer  
engine.  
No Replace the Paper size board  
(B73 PWB).  
Toner Low  
410: Yellow  
411: Magenta  
412: Cyan  
Toner in one of the  
four colors is running  
short.  
1) Is the specified toner cartridge almost  
empty?  
Yes Replace it with a new toner kit.  
2) Does the Toner sensor of the specified  
cartridge operate normally?  
No Replace the Toner sensor for the  
specified color.  
413: Black  
Remove Printed The stacker for ejected 1) Is the stacker full?  
Yes Remove papers from the stacker.  
No Replace the Stacker full sensor.  
Papers  
papers is full.  
2) Does the Stacker full sensor operate  
normally?  
480: Stacker Full  
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Table 6-1-1 Operator Alarms (5/5)  
Error Description  
Message  
Cause  
Solutions  
Yes Load papers in MT.  
Load *** Papers The specified cassette 1) No paper in MT?  
490: No paper in has no paper or is  
the MP Tray  
(*** = A4, B5 etc.) cassette be ingused for  
printing has no more  
removed. Or, the  
2) Does the Paper out sensor operate  
normally?  
No Replace the Paper out sensor.  
paper.  
Load *** Papers No paper in the  
1) No paper in the specified cassette?  
Yes Load papers in the specified cassette.  
491~495: No  
Cassette 1, 2, 3, 4 or 5  
paper in the Tray detected.  
*
(*** = A4, B5 etc.)  
2) Does the Paper out sensor operate  
normally?  
No Replace the Paper out sensor of the  
specified cassette.  
Replace Belt  
The belt counter has  
reached the life value.  
1) Is the error message displayed?  
Yes Check the belt life.  
2) Does the error occur soon after Belt unit No Replace the Belt unit immediately or at  
replacement?  
the next maintenance.  
Replace Fuser  
The fuser counter has 1) Is the error message displayed?  
reached the lifevalue  
Yes Check the fuser life.  
2) Does the error occur soon after  
Fuser unit replacement?  
No Replace the Fuser unit immediately or  
at the next maintenance.  
Job Offset Home The Job offset assy  
Does the Job offset assy operate normally? Yes Replace the Job offset sensor.  
Error  
does not operate or  
cannot detect the  
home position.  
No Replace the Job offset motor or Engine  
board.  
Running Short of Running short of paper Does only small mount of papers  
Yes Load papers.  
Paper in Tray *  
detected  
(approx. 30 sheets or less) remain?  
No Check the Paper near end sensor.  
No Confirm the procedure in the manual.  
Yes Replace the HDD as it is broken.  
Disc Operation  
Error  
HDD cannot be written. Is the operating procedure correct?  
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6.5.2 LCD message troubleshooting  
(1) LCD Message  
The message on the LCD (liquid crystal display) tells the problem situation of the printer.  
Implement the appropriate troubleshooting base on the message.  
No.  
1
2
Problem  
The printer does not work normally after being turned on.  
JAM Error  
Flowchart Number  
1
Paper Input Jam (1st Tray)  
Paper Input Jam (MT)  
Paper Feed Jam  
Paper Eject Jam  
DUPLEX Jam  
2-1  
2-2  
2-3  
2-4  
2-5  
3
3
4
5
6
Paper Size Error  
I/D Unit Up/Down Error  
Fuser Unit Error  
Fan Motor Error  
4
5
6
Note: When replacing the engine board (L73 PWB), demount the EEPROM chip from the old  
board and remount it on the new one.  
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1
The printer does not work normally after turned on.  
Turn off the printer, wait a few seconds, then turn it on again.  
Is  
displayed on the LCD (for about 1 second)?  
No Is the AC cable connected correctly?  
No Connect the AC cable correctly.  
Yes Is +5V supplied to the PANEL connector pins on the PU board (K73 PWB)?  
+5V: Pin 5  
0V: Pin 2  
Yes Is the operator panel cable connected correctly?  
No Connect the cable correctly.  
Yes Replace the operator panel cable. Recovered?  
No Replace the cover assembly of the operator panel.  
Yes End  
No Is +5V supplied on the POWER connector of the engine board (K73 PWB)?  
Pin 11,12, 13, 14: +5V Pin 3, 4, 5, 6, 23, 24, 25, 26, 27, 28, 29, 30: 0V  
No Check the connection of the POWER connector, or replace the low-voltage power  
supply unit.  
Yes Replace the engine board.  
Yes  
Are the following voltages supplied to the PU connector of the main board?  
Pin 137-147, 187-197: +5V  
Pin 148, 198: +12V  
Pin 125-136, 175-186: +3.3V  
Pin 101-124, 149-174, 199, 200: 0V  
Yes Is the main board assy inserted correctly?  
No Insert it correctly.  
Yes Replace the main board.  
No  
Are the following voltages supplied on the POWER connector of the engine board?  
Pin 11, 12, 13, 14: +5V  
Pin 1: +12V Pin 2: -12V  
Pin 15, 16, 17, 18: +3.3V  
Pin 7, 8, 9, 10: +32V  
Pin 3, 4, 5, 6, 25, 26, 27, 28: 0V  
Yes Replace the engine board.  
No  
Replace the low-voltage power supply unit.  
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2-1 Paper Input Jam (1st Tray)  
Does the jam occur soon after the printer is turned on?  
Yes Is the paper jammed at the entrance cassette sensor or the entrance MT sensor ?  
* MT : Multipurpose Tray  
Yes Remove the jammed paper.  
A
No Do the sensor levers (of the entrance cassette sensor and the entrance MT sensor) operate  
normally?  
No Replace the defective sensor lever.  
Yes Do the sensors (the entrance cassette sensor and the entrance MT sensor) work properly?  
(Operate each sensor lever and verify the signal on the FSENS connector pins on the PU  
board (K73 PWB).)  
Pin 4: Entrance cassette sensor, Pin 2: Entrance MT sensor  
No Check the signal cable connection, or replace the sensor board (R71 PWB).  
Yes Check the signal cable connection, or replace the engine board (K73 PWB).  
Does the paper jam occur immediately after the paper is fed?  
No  
Yes Does the paper reach the entrance cassette sensor or the entrance MT sensor?  
Yes Go to  
.
A
No Replace the feed roller or the Retard Pad assy in the paper tray.  
No  
Is the feed motor rotating?  
Yes Replace the feed roller.  
No  
Is the resistance of the feed motor at the rated value (approx. 7.9 or 8.4 )?  
No Replace the feed motor.  
Yes  
No Replace the low-voltage power supply unit.  
Yes Check gear engagement and cable connection, or replace the engine board.  
Is +32V supplied to the POWER connector Pins 7~10 on the engine board?  
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2-2 Paper Input Jam (Multipurpose Tray (MT))  
Does the paper jam occur immediately after the printer is powered on?  
Yes Is the paper jammed at the entrance cassette sensor or the entrance MT sensor ?  
Yes Remove the paper jam.  
A
No Does the lever of the entrance MT sensor operate normally?  
No Replace the defective sensor lever.  
Yes Does the entrance MT sensor work properly?  
(Operate the sensor lever and confirm that the sensor works properly with the signal on the  
FSENS connector pin on the engine board (K73 PWB).)  
Pin 2: Entrance MT sensor  
No Check the connection of the signal cable, or replace the sensor board (R71 PWB).  
Yes Check the signal cable connection, or replace the engine board.  
Does the paper jam occur immediately after paper is fed?  
No  
Yes Does the paper reach the entrance MT sensor ?  
Yes Go to  
.
A
No Replace the multipurpose tray assembly.  
No  
Does the registration motor rotate properly?  
No Is +32V supplied to the POWER connector Pins 7~10 on the engine board?  
No Replace the low-voltage power supply unit.  
Yes Check the connection of cables, or replace the engine board.  
Yes  
Go to 2-3 Paper Feed Jam.  
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2-3 Paper Feed Jam  
Does the paper jam occur immediately after the printer is powered on?  
Yes Is the paper jammed at the entrance belt sensor?  
Yes Remove the jammed paper.  
A
No Does the lever of the write sensor work right?  
No Replace the lever of the write sensor.  
Yes Does the entrance belt sensor work properly?  
(Operate the sensor lever and verify the signal on the FSENS connector pin on the engine  
board (K73 PWB).)  
Pin 6: Entrance belt sensor  
No Check the connection of the cable, or replace the sensor board (R71 PWB).  
Yes Check the signal cable connection. Is it attached properly?  
No Connect the cable properly.  
Yes Replace the engine board.  
No  
Does the paper jam occur immediately after paper is fed?  
Yes Does the paper reach the write sensor?  
Yes Go to  
.
A
No Is the registration motor rotating?  
No Is the resistance of the registration motor at the rated value (approx. 7.9 )?  
No Replace the registration motor.  
Yes Check the gear engagement, or replace the engine board.  
Yes Replace the resistration roller (A) or (B).  
Does the paper jam occur when paper is loaded?  
Yes Does the belt motor rotate properly?  
No  
No Is the resistance of the belt motor at the rated value (approx. 7.9 )?  
No Replace the belt motor.  
Yes Check gear engagement, or replace the engine board.  
Yes Check gear engagement, or replace the belt assy.  
End  
No  
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2-4 Paper Eject Jam  
Does the paper jam occur immediately after the printer is powered on?  
Yes Is the paper jammed at the ejection sensor?  
Yes Remove the jammed paper.  
No Does the lever of the ejection sensor operate normally?  
No Replace the ejection sensor lever.  
Yes Does the ejection sensor work properly?  
(Operate the sensor lever and confirm that the sensor works properly or verify the signal on  
the PARTTEMP connector Pin 8 on the engine board (K73 PWB).)  
Pin 8: Ejection sensor  
No Check the signal cable connection, or replace the ejection sensor.  
Yes Replace the engine board.  
No  
Dose the heat motor rotate properly?  
No Is the resistance of the heat motor at the rated value (approx. 7.9 )?  
No Replace the heat motor.  
Yes Is +32V supplied to the POWER connector Pins 7~10 on the engine board?  
No Replace the low-voltage power supply unit.  
Yes Check the connection of the cables, or replace the engine board.  
Yes  
Does the paper separator operate normally?  
No Does the paper separator solenoid work normally?  
No Check the cable connection, or replace the solenoid or the engine board.  
Yes Replace the paper separator assy.  
Yes  
Replace the eject guide assy.  
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2-5 DUPLEX jam  
Does the paper jam occur immediately after the printer is turned on?  
Yes Is the paper jammed at the in sensor, rear sensor or front sensor in the DUPLEX unit?  
Yes Remove the jammed paper.  
No Do the in sensor, rear sensor and front sensor in the DUPLEX unit operate properly?  
No Replace the defective sensor.  
Yes Check the cable connections at the in sensor, rear sensor and front sensor of the DUPLEX  
unit, or replace the DUPLEX unit board (V73 PWB).  
No  
Does the paper jam occur immediately after paper is fed into the DUPLEX unit?  
Yes Is the DUPLEX motor rotating?  
No Replace the DUPLEX motor.  
Yes Check gear engagement or replace the DUPLEX board (V73 PWB).  
Yes  
Replace the DUPLEX unit.  
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3
Paper Size Error  
Is paper in the specified size used?  
No Use paper that complies with the specification.  
Yes Is the paper jammed at the entrance MT sensor or at the paper width sensor?  
Yes Remove the jammed paper.  
Yes  
Does the lever of the entrance MT sensor operate normally?  
No Replace the defective sensor lever.  
Yes  
Does the entrance MT sensor work properly?  
(Operate the sensor lever and verify the signal on the FSENS connector pin on the engine  
board (K73 PWB).)  
Pin 4: Entrance MT sensor  
No Check cable connection, or replace the sensor board (R71 PWB).  
Yes  
Does the lever of the entrance belt sensor operate normally?  
No Replace the defective sensor lever.  
Yes  
Does the entrance belt sensor work properly?  
(Operate the sensor lever and confirm that the sensor works properly, verify the signal on  
the FSENS connector pin on the engine board (K73 PWB).)  
Pin 6: Entrance belt sensor  
No Check cable connection or replace the sensor board (R71 PWB).  
Yes  
Do all the paper-size detecting switches on the size detecting board (B73 PWB) work right?  
(Press the paper-size detecting switches and verify the signal on the engine board PSIZE  
connector pins.)  
Pin 3: Paper size detector 1  
Pin 4: Paper size detector 2  
Pin 5: Paper size detector 3  
Pin 6: Paper size detector 4  
No Check cable connection, or replace the size detecting board (B73 PWB).  
Yes  
Check cable connection, or replace the engine board.  
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4
Image Drum Unit (IDU) Up/Down Error  
Turn off the printer, wait a few seconds, then turn it on again.  
Does each drum unit rotate properly while printing?  
No Is the resistance of the IDU motor at the rated value (approx. 4.0 )?  
No Replace the defective IDU motor.  
Yes Is +32V supplied to the POWER connector Pins 7~10 on the engine board?  
No Replace the low-voltage power unit.  
Yes Check cable connection, or replace the engine board.  
Yes  
Does the IDU sensor lever work adequately?  
No Check gear engagement and the sensor lever operation, or replace the defective gear or  
sensor lever.  
Yes  
Does the IDU sensor operate properly?  
Verify the signal on the JODEN connector pins on the driver board (K73 PWB).  
Pin 4: IDU sensor cyan  
Pin 14: IDU sensor black  
Pin 2: IDU sensor magenta  
Pin 12: IDU sensor yellow  
No Replace the junction board (N73 PWB).  
Yes  
Check the cable connection between the junction board (N73 PWB) and engine board (K73  
PWB), or replace the engine board.  
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5
Fuser Unit Error  
Does the fuser error occur immediately after the printer is turned on?  
A
Yes Does the heat roller thermistor have a open or short circuit? (See Figure 6.1.)  
(at room temperature 0 °C~ 43 °C, approx. 190 ~ 980 )  
Yes Replace the fuser unit.  
No Does the back-up roller thermistor have a open or short circuit? (See Figure 6.1.)  
(at room temperature 0 °C~ 43 °C, approx. 190 ~ 980 )  
Yes Replace the fuser unit.  
No  
No  
Does the fuser error occur about 3 min. after the printer is turned on?  
No Go to A .  
Yes  
Is the fusers heater on? (Does it get hot?)  
Yes Replace the engine board.  
No Replace the fuser unit.  
No  
Does AC voltage appear between CN1 connector Pin 1 and Pin3 of the low-voltage power  
supply unit?  
No Replace the low-voltage power supply unit.  
Yes  
Replace the fuser unit.  
Halogen Lamp  
Back-up Roller Thermistor  
Heat Roller Thermistor  
Bottom part of Fuser Unit  
Figure 6.1  
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6
Fan Motor Error  
Does the fan of the low-voltage power supply unit rotate after the printer is turned on?  
Yes Does the error recur after the fan of the low-voltage power supply unit has been replaced?  
Yes Replace the low-voltage power supply unit.  
No End  
Does the engine board fan rotate after the printer is turned on?  
No Is +32V supplied to the FAN connector Pin 1 on the engine board (K73 PWB)?  
Yes  
No Is +32V supplied to the POWER connector pins on the engine board (K73 PWB)?  
+32V: Pin 7, 8, 9, 10  
No Check cable connection or replace the low-voltage power supply unit.  
Yes Replace the engine board.  
Yes Replace the fan of the engine board.  
Yes  
Does the fuser fan rotate after the printer is turned on?  
No Is +32V supplied to the JOBOFF connector Pin 5 on the engine board (K73 PWB)?  
No Is +32V supplied to the POWER connector pins on the engine board (K73 PWB)?  
+32V: Pin 7, 8, 9, 10  
No Check cable connection, or replace the low-voltage power supply unit.  
Yes Replace the engine board.  
Yes Replace the fuser fan.  
End  
Yes  
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6.5.3 Image troubleshooting  
When the printout images are not satisfactory as shown below, follow the troubleshooting  
procedures given in this section.  
Printout problem  
Flowchart No.  
Light or blurred images, or images in inappropriate color tone (Figure 6.2- A )  
Dark background (Figure 6.2- B )  
1
2
3
4
5
6
7
8
9
0
No images on print output (Figure 6.2- C )  
Band/stripes in black or color in the longitudinal direction (Figure 6.2- D )  
Band/stripes in white or irregular color in the longitudinal direction (Figure 6.2- F )  
Poor fusing (Images are blurred or peeled off when touched with a hand.)  
Cyclical printout defects (Figure 6.2- E )  
Missing characters  
Color misalignment  
Printout colors different from the original  
D
Black stripes in the  
vertical direction  
A
B
C
Light or blurred  
images as a whole  
Dark background  
density  
Blank paper  
E
Cyclical defect  
F
White belts or  
streaks in the  
vertical direction  
Figure 6.2  
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1
Light or blurred images or images in inappropriate color tone on the whole printout area  
(Figure 6.2- A )  
Is toner low? (Is the message "Toner Low" displayed?)  
Yes Supply toner.  
No  
Is the specified paper used?  
No Use the specified paper.  
Yes  
Is the lens of the LED head dirty?  
Yes Clean the LED head lens.  
No  
Is each LED head assy connected properly to the junction board (Y71 PWB) and engine  
board (K73 PWB)?  
No Check the cable connection (between each LED head and the engine board) and connect  
the cable between the LED head and the engine board properly.  
Yes  
Is+3.8VsuppliedtothefollowingPOWERconnectorpinsonthejunctionboard(Y71PWB)?  
+3.8V: Pins 1, 2, 3, 4, 5, 6, 7 and 8  
Yes Is +3.8V supplied to each LED head assy from the junction board (Y73 PWB)?  
YPOW connector Pin 3: LED head assy yellow  
MPOW connector Pin 3: LED head assy magenta  
CPOW connector Pin 3: LED head assy cyan  
BPOW connector Pin 3: LED head assy black  
No Replace the junction board (Y71 PWB).  
Yes Check the cable connection, or replace the LED head assy.  
Check the cable connection, or replace the low-voltage power supply unit. Recovered?  
Yes End  
No  
No  
Is +32V supplied to the POWER connector pins on the engine board (K73 PWB)?  
+32V: Pins 7, 8, 9 and 10  
No Check cable connection, or replace the low-voltage power supply unit.  
Yes  
Is +32V supplied to the HVOLT connector Pin 5 on the engine board (K73 PWB)?  
No Replace the engine board.  
Yes  
Checkthecableconnection, replacethehigh-voltagepowerunit, orbeltcassetteassembly.  
Recovered?  
Yes End  
No  
Is each ID terminal connected correctly to the contact assembly? (See Figure 6.3.)  
No Connect the ID terminals with the contact assembly correctly.  
Yes  
Replace the ID unit.  
Notes: 1. When replacing the engine board (K73 PWB), demount the EEPROM chip from the old  
engine board and remount it on the new one.  
2. In case the EEPROM chip is not replaced, see Item (2) in Sec. 6.5.2.  
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2
Dark background (Figure 6.2- B )  
Was each ID exposed to external light for a long time?  
Yes Replace the ID unit.  
Note: Reset the counter after replacement.  
No  
Are the rollers in the fuser unit contaminated?  
Yes Replace the fuser unit.  
No  
Adjust the setting of MEDIA TYPE.  
Light: 60 g/sq.m. Med. light: 64~74 g/sq.m. Medium: 75~90 g/sq.m.  
Med. heavy: 91~104 g/sq.m. Heavy: 105~122 g/sq.m. Ultra heavy: 123~175 g/sq.m.  
No Set the MEDIA TYPEproperly.  
No  
Is each LED head assy connected to the junction board(Y71 PWB) correctly?  
No Connect each LED head assy to the junction board(Y71 PWB) appropriately.  
Yes  
Is+3.8VsuppliedtothefollowingPOWERconnectorpinsonthejunctionboard(Y71PWB)?  
+3.8 V: Pins 1, 2, 3, 4, 5, 6, 7 and 8  
Yes Is +3.8V supplied to the following cable connector pins between the junction board (Y71  
PWB) and each LED head assy?  
YPOW connector Pin 3: LED head assy yellow  
MPOW connector Pin 3: LED head assy magenta  
CPOW connector Pin 3: LED head assy cyan  
BPOW connector Pin 3: LED head assy black  
No Replace the junction board(Y71 PWB).  
Yes Check the cable connection, or replace the LED head assy.  
Check the cable connection, or replace the low-voltage power supply unit. Recovered?  
Yes End  
No  
No  
Is +32V supplied to the POWER connector pins on the engine board (K73 PWB)?  
+32V: Pins 7, 8, 9 and 10  
No  
Check the cable connection, or replace the low-voltage power supply unit.  
Is +32V supplied to the POWER connector pins of the engine board (K73 PWB)?  
Yes  
No Replace the engine board.  
Yes  
Check the cable connection, or replace the high-voltage power supply unit or belt cassette  
assy. Recovered?  
Yes End  
No  
Is each ID terminal connected to the contact assembly correctly? (See Figure 6.3.)  
No Connect the ID terminals with the contact assembly correctly.  
Yes  
Replace the ID unit.  
Notes:  
When replacing the engine board (K73 PWB), demount the EEPROM chip from the old  
engine board and remount it on the new one.  
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3
Blank paper (Figure 6.2- C )  
Is each LED head assembly connected to the junction board (Y71 PWB) and Engine board (K73  
PWB)correctly?  
No Check the cable connection the LED assembly with the junction board (Y71 PWB) and  
engine board.  
Yes  
Is+3.8VsuppliedtothefollowingPOWERconnectorpinsonthejunctionboard(Y71PWB)?  
+3.8V: Pin 1, 2, 3, 4, 5, 6, 7, 8  
Yes Is +3.8V supplied to the following cable connector pins between the junction board (Y71  
PWB) and each LED head assembly?  
YPOW connector Pin 3 : LED head assembly yellow  
MPOW connector Pin 3 : LED head assembly magenta  
CPOW connector Pin 3 : LED head assembly cyan  
BPOW connector Pin 3 : LED head assembly black  
No Replace the junction board (Y71 PWB).  
Yes Check the cable connection, or replace the LED head assembly.  
No  
Is +32V supplied to the POWER connector pins of the engine board (K73 PWB)?  
+32V: Pin 7, 8, 9, 10  
No Check the cable connection, or replace the low-voltage power supply unit.  
Yes  
Is +32V supplied to the HVOLT connector Pin 5 of the engine board (K73 PWB)?  
No Replace the engine board.  
Yes  
Check the cable connection, or replace the high-voltage power supply unit or belt cassette  
assembly. Recovered?  
Yes End  
No  
Is each ID terminal connected to the contact assembly correctly? (See Figure 6.3.)  
No Connect the ID terminals with the contact assembly correctly.  
Yes  
Replace the ID unit.  
Notes: 1. When replacing the engine board (K73 PWB), demount the EEPROM chip from the old  
engine board and remount it on the new one.  
2. In case the EEPROM chip is not replaced, see Item (2) in Sec. 6.5.2.  
41388601TH Rev.2  
120 /  
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4
Band/stripes in black or color in the longitudinal direction (Figure 6.2- D )  
Is each LED head assembly connected to the junction board (Y71 PWB) correctly?  
No Connect the LED head assembly to the junction board correctly.  
Yes  
Check the cable connection, or replace the LED head assembly. Recovered?  
Yes End  
No  
No  
Check the cable connection, or replace the junction board (Y71 PWB). Recovered?  
Yes End  
Is the engine board (K73 PWB) connected with the junction board (Y71 PWB) correctly?  
No Connect the engine board with the junction board correctly.  
Yes  
Check the cable connection, or replace the engine board (K73 PWB). Recovered?  
Yes End  
No  
Is each ID terminal connected to the contact assembly correctly? (See Figure 6.3.)  
No Connect the ID terminals with the contact assembly correctly.  
Yes  
Replace the ID unit.  
Notes: 1. When replacing the engine board (K73 PWB), demount the EEPROM chip from the old  
engine board and remount it on the new one.  
2. In case the EEPROM chip is not replaced, see Item (2) in Sec. 6.5.2.  
41388601TH Rev.2  
121 /  
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5
Band/stripes in white or irregular color in the longitudinal direction (Figure 6.2- F )  
Is each LED head lens contaminated?  
Yes Clean the LED head lens.  
No  
Is each LED head assembly connected to the junction board (Y71 PWB) correctly?  
No Connect the LED head assembly to the junction board (Y71 PWB) correctly.  
Yes  
Check the cable connection, or replace the LED head assembly. Recovered?  
Yes End  
No  
No  
Check the cable connection, or replace the junction board (Y71 PWB). Recovered?  
Yes End  
Is the engine board (K73 PWB) connected with the junction board correctly?  
No Connect the engine board with the junction board correctly.  
Yes  
Check the cable connection, or replace the engine board (K73 PWB). Recovered?  
Yes End  
No  
Is each ID terminal connected to the contact assembly correctly? (See Figure 6.3.)  
No Connect the ID terminals with the contact assembly correctly.  
Yes  
Replace the ID unit.  
Notes: 1. When replacing the engine board (K73 PWB), demount the EEPROM chip from the old  
engine board and remount it on the new one.  
2. In case the EEPROM chip is not replaced, see Item (2) in Sec. 6.5.2.  
41388601TH Rev.2  
122 /  
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6
Poor fusing (Images are blurred or peeled off when touched with a hand.)  
Is the specified paper used?  
No Use the proper paper.  
Yes  
Is the contact of the fuser unit connected correctly?  
No Connect the contact of the fuser unit properly.  
Yes  
Are the rollers in the fuser unit contaminated?  
Yes Replace the fuser unit.  
No  
Is the MEDIA TYPE(MENU 1) set correctly?.  
Light: 60 g/sq.m. Med. light: 64~74 g/sq.m. Medium: 75~90 g/sq.m.  
Med. heavy: 91~104 g/sq.m. Heavy: 105~122 g/sq.m. Ultra heavy: 123~175 g/sq.m.  
No Set the proper MEDIA TYPE.  
Yes  
DoesACvoltageappearbetweentheCNconnectorPin1andPin3ofthelow-voltagepower  
supply unit?  
No Replace the low-voltage power supply unit.  
Yes  
Is the resistance of the heat roller thermistor within the rated value? (See the Figure 6.1.)  
(at room temperature 0 °C~ 43 °C, approx. 190 ~ 980 )  
No Replace the fuser unit.  
Yes  
Istheresistanceoftheback-uprollerthermistorwithintheratedvalue?(SeetheFigure6.1.)  
(at room temperature 0 °C~ 43 °C, approx. 190 ~ 980 )  
No Replace the fuser unit.  
Yes  
IstheTHERM1signalontheTHERMconnectorPin6ontheengineboard(K73PWB)within  
the range below?  
No Replace the fuser unit assy.  
Yes  
Replace the fuser unit assy.  
Notes: 1. When replacing the engine board (K73 PWB), demount the EEPROM chip from the old  
engine board and remount it on the new one.  
2. In case the EEPROM chip is not replaced, see Item (2) in Sec. 6.5.2.  
41388601TH Rev.2  
123 /  
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7
Cyclical printout defects (Figure 6.2- E )  
Cycle  
3.71 in.  
Defective Part  
Image Drum  
Solution  
Replace the ID unit.  
1.95 in.  
2.66in.  
1.73 in.  
4.45 in.  
2.28 in.  
Developing Roller  
Toner Supply Roller  
Charge Roller  
Replace the ID unit.  
Replace the ID unit  
Replace the ID unit.  
Fuser Roller  
Replace the fuser unit.  
Replace the belt cassette assembly.  
Transfer Roller  
Note: After replacement of the ID unit, fuser unit or belt cassette unit, the corresponding counter  
will be reset.  
41388601TH Rev.2  
124 /  
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8
Missing characters  
Is the LED head lens contaminated?  
Yes Clean the lens of LED head.  
No  
Is each LED head assembly connected to the junction board (Y71 PWB) correctly?  
No Check the cable connection, and connect the LED head to the junction board correctly.  
Yes  
Is +3.8V supplied to the following HEADPOW connector pins of the junction board (Y71  
PWB)?  
+3.8V: Pin 1, 2, 3, 4, 5, 6, 7, 8  
Yes Is +3.3V supplied to each LED head assembly from the junction board (Y71 PWB)?  
YPOW connector Pin 3 : LED head assembly yellow  
MPOW connector Pin 3 : LED head assembly magenta  
CPOW connector Pin 3 : LED head assembly cyan  
BPOW connector Pin 3 : LED head assembly black  
No Replace the junction board (Y73 PWB).  
Yes Check the cable connection, or replace the LED head assembly.  
No  
Check the cable connection, or replace the low-voltage power supply unit. Recovered?  
Yes End  
No  
Is +32V supplied to the POWER connector of the engine board (K73 PWB)?  
+32V: Pin 7, 8, 9, 10  
No Check the cable connection, or replace the low-voltage power supply unit.  
Yes  
Is +32V supplied to the HVOLT connector pin 5 of the engine board (K73 PWB)?  
No Replace the engine board.  
Yes  
Check the cable connection, replace the high-voltage power supply unit or belt cassette  
assembly. Recovered?  
Yes End  
No  
Is each ID terminal connected to the contact assembly correctly? (See Figure 6.3.)  
No Connect the ID terminals with the contact assembly correctly.  
Yes  
Replace the ID unit.  
Notes: 1. When replacing the engine board (K73 PWB), demount the EEPROM chip from the old  
engine board and remount it on the new one.  
2. In case the EEPROM chip is not replaced, see Item (2) in Sec. 6.5.2.  
41388601TH Rev.2  
125 /  
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9
Color Misalignment  
Areanyofthefollowinggearsbroken?(GearassyofIDunit, MultipurposeTray, beltunitandbeltmotor)  
Yes Replace the broken gear assembly.  
No  
Is each LED head unit connected to the junction board (Y71 PWB) correctly?  
No Connect the LED head unit correctly with the junction board.  
Yes  
Check the cable connection, or replace the LED head assembly. Recovered?  
Yes End  
No  
No  
Check the cable connection, or replace the junction board (Y71 PWB). Recovered?  
Yes End  
Is engine board (K73 PWB) connected to the junction board (Y71 PWB) correctly?  
No Connect the boards correctly.  
Yes  
Check the cable connection, or replace the EEPROM of the engine board. Recovered?  
Yes End  
No  
No  
Replace the engine board. Recovered?  
Yes End  
Is each ID terminal connected to the contact assembly correctly? (See Figure 6.3.)  
No Connect the ID terminals with the contact assembly correctly.  
Yes  
Replace the ID unit.  
Notes: 1. When replacing the engine board (K73 PWB), demount the EEPROM chip from the old  
engine board and remount it on the new one.  
2. In case the EEPROM chip is not replaced, see Item (2) in Sec. 6.5.2.  
41388601TH Rev.2  
126 /  
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0
Printout colors different from the original  
Are the LED head lens contaminated?  
Yes Clean the LED head lens.  
No  
Is each LED head assembly connected to the junction board (Y73 PWB) correctly?  
No Check the cable connection (between each LED head and the junction board) and connect  
the LED assy to the junction board correctly.  
Yes  
Is +3.8V supplied to the following HEADPOW connector pins of the junction board (Y71  
PWB)?  
+3.8V: Pin 1, 2, 3, 4, 5, 6, 7, 8  
Yes Is +3.8V supplied to each LED head assembly from the junction board (Y71 PWB)?  
YPOW connector Pin 3 : LED head assembly yellow  
MPOW connector Pin 3 : LED head assembly magenta  
CPOW connector Pin 3 : LED head assembly cyan  
BPOW connector Pin 3 : LED head assembly black  
No Replace the junction board (Y71 PWB).  
Yes Check the cable connection, or replace the LED head assembly.  
Check the cable connection, or replace the low-voltage power supply unit. Recovered?  
Yes End  
No  
No  
Is +32V supplied to the POWER connector of the engine board (K73 PWB)?  
+32V; Pin 7, 8, 9, 10  
No Check the cable connection, or replace the low-voltage power supply unit.  
Yes  
Is +32V supplied to HVOLT connector pin 5 of the engine board (K73 PWB)?  
No Replace the engine board.  
Yes  
Check the cable connection, replace the high-voltage power supply unit or belt cassette  
assembly. Recovered?  
Yes End  
No  
Is each ID terminal connected to the contact assembly correctly? (See Figure 6.3.)  
No Connect the ID terminals with the contact assembly correctly.  
Yes  
Replace the ID unit.  
Notes: 1. When replacing the engine board (K73 PWB), demount the EEPROM chip from the old  
engine board and remount it on the new one.  
2. In case the EEPROM chip is not replaced, see Item (2) in Sec. 6.5.2.  
41388601TH Rev.2  
127 /  
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Ground  
Charge Roller  
Developing Roller  
Toner Supply Roller  
Figure 6.3  
41388601TH Rev.2  
128 /  
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Unit  
Circuit Diagram  
Illustration  
Resistance  
Yellow  
1
2
M
Orange  
Between pins 1 and 2: 7.9  
Between pins 3 and 4: 7.9  
Transfer Belt Motor  
Black  
Black  
3
4
1
2
M
M
Between pins 1 and 2: 2.4  
Between pins 3 and 4: 2.4  
Main Motor (Y)  
3
4
1
2
Between pins 1 and 2: 2.4  
Between pins 3 and 4: 2.4  
Main Motor (M)  
3
4
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Unit  
Circuit Diagram  
Illustration  
Resistance  
1
2
M
Between pins 1 and 2: 2.4  
Between pins 3 and 4: 2.4  
Main Motor (C)  
3
4
1
2
M
M
Between pins 1 and 2: 2.4  
Between pins 3 and 4: 2.4  
Main Motor (B)  
3
4
1
2
Between pins 1 and 2: 7.9  
Between pins 3 and 4: 7.9  
MT  
Resistration Motor  
3
4
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Unit  
Circuit Diagram  
Yellow  
Illustration  
Resistance  
1
2
M
Orange  
Between pins 1 and 2: 7.9  
Between pins 3 and 4: 7.9  
Fuser Motor  
Black  
Black  
3
4
1
2
M
M
Between pins 1 and 2:  
7.9  
Between pins 3 and 4:  
7.9  
or 8.4  
Feeder Motor  
or 8.4  
3
4
Yellow  
1
2
Orange  
Between pins 1 and 2: 23  
Between pins 3 and 4: 23  
Offset Motor  
Black  
3
4
Brown  
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Unit  
Circuit Diagram  
Illustration  
Resistance  
-
CN-1  
Geared Motor  
M
+
CN-2  
Red  
1
+32 V  
Yellow  
3
FANALM-N  
CU Low-voltage  
Ejection  
M
M
Fuser Fan  
Black  
2
0 V  
Red  
1
+32 V  
Yellow  
3
FANALM-N  
Low-voltage  
Absorption  
Black  
2
0 V  
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Unit  
Circuit Diagram  
Red  
Illustration  
Resistance  
1
+5 V  
White  
3
FANALM-N  
CU Board  
M
M
Black  
2
0 V  
Red  
1
+5 V  
Yellow  
3
ID and Fuser  
Black  
2
0 V  
1 Upper roller  
2 Lower roller  
1
a
b
Thermostat  
Heater  
Thermostat  
a
a
Between pins a and b:  
Heater  
Between pins c and d: 231.4k  
Between pins e and f: 231.4k  
(at 25  
°
C)  
C)  
f
b
c
b
c
e
d
Thermistor  
Center  
c
Fuser Unit  
Fuse  
2
Between pins a and b:  
Between pins c and d: 0  
Between pins e and f: 231.4k  
or open  
(at 25  
d
e
d
e
Thermistor  
Left  
Thermistor  
°
f
f
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7.2 Parts Layout on Boards  
(1) Print Engine Controller PWB (K73)  
SHUTTER FRPUCL  
HOPFF  
RCL  
ID  
CPUFL1  
DUPLEX  
DUCOV  
PSIZE  
POWER  
HVOLT  
41388601TH Rev.2  
134 /  
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(2) Main Controller PWB: CRM  
FAN  
PUIF  
3
1
ROM  
1
2
49  
50  
IDE  
A1  
B1  
C1  
A36  
B36  
C36  
PCICU  
2
3
1
4
18  
36  
1
19  
USB  
CENT  
41388601TH Rev.2  
135 /  
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(3) LED Control PWB (Y71-2 PWB)  
OPTN  
(4) Duplex Control PWB (V73- PWB)  
SNS1  
(5) Control Panel PWB (X71- PWB)  
SW1  
SW2  
SW3  
SW4  
SW5  
SW6  
SW7  
SW8  
41388601TH Rev.2  
136 /  
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(6) N71-PWB  
JODEN  
(7) Entrance Sensor PWB (R71- PWB)  
INSNS2  
WRSNS  
INSNS1  
HUM  
TNR  
(8) Paper Size Sensing PWB PXC (B73- PWB)  
SW1  
SW2  
SW3  
SW4  
CN11  
(9) Sensor PWB (A73-PWB)  
LIFT  
HOP  
(10) Option I/F PWB (C73-PWB)  
MAIN1  
SAVIF  
41388601TH Rev.2  
137 /  
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8.  
PARTS LIST  
25  
22  
21  
21  
24  
8
21  
23  
21  
7
21  
17  
21  
19  
19  
17  
42  
21  
28  
31  
30  
17  
21  
6
21  
21  
17  
26  
14  
19  
5
17  
21  
11  
15  
17  
20  
19  
21  
19  
17  
13  
19  
19  
41  
12  
19  
4
9
19  
1
19  
2
3
19  
Figure 8-1-1/3  
41388601TH Rev.2  
138 /  
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16  
19  
10  
17  
C
B
19  
17  
C
C
17  
A
C
B
18  
A
18  
Figure 8-1-2/3  
41388601TH Rev.2  
139 /  
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44  
34  
39  
33  
40  
44  
38  
39  
32  
35  
36  
27  
37  
Figure 8-1-3/3  
41388601TH Rev.2  
140 /  
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Table 8-1-1/3  
Main Assembly  
Recommended Q’ty/Year  
No.  
Patrs No.  
Name  
Q’ty  
Remarks  
/Unit  
per  
per  
per  
500  
1000  
2000  
1
2
3
4
5
6
7
8
9
41481201  
Cover Assy-R  
Cassette Assy  
Cover-Front-CS  
Cover-Blank  
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
20  
2
24  
1
31  
1
1
1
1
1
1
1
1
1
1
1
1
1
3
3
3
3
3
3
3
3
3
3
3
6
3
3
3
3
3
-
6
6
6
6
6
6
6
6
6
6
6
12  
6
6
6
6
6
-
12  
12  
12  
12  
12  
12  
12  
12  
12  
12  
12  
24  
12  
12  
12  
12  
12  
-
41484905  
41353701  
41277901  
41276401  
41277401  
41484201  
41276501  
41484601  
Cover-Front  
Cover-Side(L)  
Stacker-Face-Up Assy  
Cover-Rear  
Cover-Assy MT  
MPT Assy-703  
10 41493001  
11 41297101  
12 40325101  
13 41278001  
14 41515108  
41515112  
Plate-Top  
Gear-Z68  
Frame-Top  
Print Engine Controller PWB  
Print Engine Controller PWB  
Motor-Fan(80)  
1200dpi  
600dpi  
15 41490702  
16 41275702  
Microswitch-Assy  
17 4PB4083-2500P008 Screw (T3×8)  
18 4PB4013-3100P008 Screw (M3×8)  
19 4PB4083-2500P010 Screw (T3×10)  
-
-
-
-
-
-
20 55943501  
EEPROM  
3
40  
3
3
3
3
3
-
6
80  
6
6
6
6
6
-
12  
120  
12  
12  
12  
12  
12  
-
21 4PB4013-3100P006 Screw (M3×6)  
22 41531401  
N/A  
Fuser-Unit  
ODA(120V)  
OEL/APS  
ODA(230V)  
ODA  
Fuser-Unit  
41531403  
23 41531501  
N/A  
Fuser-Unit  
Belt-Unit  
Belt-Unit  
OEL/APS  
ODA  
24 41514705  
41514706  
41514707  
41514708  
N/A  
ID-Y Type C3  
ID-M Type C3  
ID-C Type C3  
ID-K Type C3  
ID-Y Type C3  
ID-M Type C3  
ID-C Type C3  
ID-K Type C3  
-
-
-
ODA  
-
-
-
ODA  
-
-
-
ODA  
-
-
-
OEL  
N/A  
-
-
-
OEL  
N/A  
-
-
-
OEL  
N/A  
-
-
-
OEL  
41388601TH Rev.2  
141 /  
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Table 8-1-2/3  
Recommended Q’ty/Year  
No.  
Patrs No.  
Name  
Q’ty  
Remarks  
/Unit  
per  
per  
per  
500  
1000  
2000  
24 N/A  
N/A  
ID-Y Type C3  
ID-M Type C3  
ID-C Type C3  
ID-K Type C3  
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3
3
3
3
-
-
-
-
APS  
APS  
APS  
APS  
ODA  
ODA  
ODA  
ODA  
OEL  
OEL  
OEL  
OEL  
APS  
APS  
APS  
APS  
ODA  
ODA  
ODA  
ODA  
OEL  
OEL  
OEL  
OEL  
APS  
APS  
APS  
APS  
1200dpi  
600dpi  
N/A  
-
-
N/A  
-
-
25 41515205  
Toner-Cartridge_Type_C3_Y (15K)  
Toner-Cartridge_Type_C3_M (15K)  
Toner-Cartridge_Type_C3_C (15K)  
Toner-Cartridge_Type_C3_K (15K)  
Toner-Cartridge_Type_C3_Y (15K)  
Toner-Cartridge_Type_C3_M (15K)  
Toner-Cartridge_Type_C3_C (15K)  
Toner-Cartridge_Type_C3_K (15K)  
Toner-Cartridge_Type_C3_Y (15K)  
Toner-Cartridge_Type_C3_M (15K)  
Toner-Cartridge_Type_C3_C (15K)  
Toner-Cartridge_Type_C3_K (15K)  
Toner-Cartridge_Type_C3_Y (7.5K)  
Toner-Cartridge_Type_C3_M (7.5K)  
Toner-Cartridge_Type_C3_C (7.5K)  
Toner-Cartridge_Type_C3_K (7.5K)  
Toner-Cartridge_Type_C3_Y (7.5K)  
Toner-Cartridge_Type_C3_M (7.5K)  
Toner-Cartridge_Type_C3_C (7.5K)  
Toner-Cartridge_Type_C3_K (7.5K)  
Toner-Cartridge_Type_C3_Y (7.5K)  
Toner-Cartridge_Type_C3_M (7.5K)  
Toner-Cartridge_Type_C3_C (7.5K)  
Toner-Cartridge_Type_C3_K (7.5K)  
PCB Assy-CRM  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
6
6
6
6
-
41515206  
-
41515207  
-
41515208  
-
N/A  
-
N/A  
-
N/A  
-
N/A  
-
N/A  
-
N/A  
-
N/A  
-
N/A  
-
N/A  
-
N/A  
-
N/A  
-
N/A  
-
N/A  
-
N/A  
-
N/A  
-
N/A  
-
N/A  
-
N/A  
N/A  
-
-
N/A  
-
26 41356019  
41356020  
27 8164323M0000  
28 41469504  
29  
12  
12  
12  
12  
PCB Assy-CRM  
EEPROM(CU)  
Board-TNY  
41388601TH Rev.2  
142 /  
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Table 8-1-3/3  
Recommended Q’ty/Year  
No.  
Patrs No.  
Name  
Q’ty  
Remarks  
/Unit  
per  
per  
per  
500  
1000  
2000  
30 41437418  
N/A  
Board-Memory 64MB  
Board-Memory 64MB  
Board-Memory 64MB  
Board-Memory 128MB  
1
1
1
1
3
3
3
3
6
6
6
6
12  
12  
12  
12  
600dpi-ODA  
600dpi-OEL  
N/A  
600dpi-APS  
41437419  
600dpi Duplex-  
ODA,1200dpi-ODA  
600dpi Duplex-  
N/A  
N/A  
Board-Memory 128MB  
Board-Memory 128MB  
1
1
3
3
6
6
12  
12  
OEL,1200dpi-OEL  
600dpi Duplex-  
APS,1200dpi-APS  
1200dpi Duplex-ODA  
1200dpi Duplex-OEL  
1200dpi Duplex-APS  
1200dpi-ODA  
1200dpi-OEL  
41437420  
N/A  
Board-Memory 256MB  
Board-Memory 256MB  
Board-Memory 256MB  
Board-Memory 64MB  
Board-Memory 64MB  
Board-Memory 64MB  
Board-MLETB09  
Board-MLETB09  
HDD Assy  
1
1
3
3
6
6
12  
12  
12  
12  
12  
N/A  
1
3
6
31 41437418  
41437414  
1
3
6
1
3
6
41437410  
1
3
6
12 1200dpi-APS  
32 41376902  
41437302  
(1)  
(1)  
(1)  
(1)  
(1)  
1
(3)  
(3)  
(3)  
(3)  
(3)  
3
(6)  
(6)  
(6)  
(6)  
(6)  
6
(12) Option-OEL  
(12) Option-APS  
33 41376005  
41376004  
(12) Option-ODA  
HDD Assy  
(12) Option-OEL  
41376002  
HDD Assy  
(12) Option-APS  
34 41286901  
35 41278601  
36 41278701  
37 41410201  
38 41467401  
39 41254601  
40 41278401  
41 41366501  
42 41366601  
43  
Plate Shield  
12  
28  
12  
12  
12  
28  
20  
12  
12  
Guide -Rail(A)  
2
6
12  
6
Guide -Rail(B)  
1
3
Motor-Fan  
1
3
6
Plate-FG(Centro)  
Plate-blank  
1
3
6
2
6
12  
10  
6
Screw  
2
5
Limitter-2Way(Front)  
Limitter-2Way(Rear)  
1
3
1
3
6
44 41723901  
Screw  
2
-
-
-
41388601TH Rev.2  
143 /  
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1
5
4
13  
11  
12  
14  
17  
6
18  
16  
8
3
7
16  
15  
3
3
10  
18  
3
3
2
3
9
3
2
16  
3
2
2
Figure 8-2  
41388601TH Rev.2  
144 /  
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Table 8-2  
Top Cover Assembly  
Recommended Q’ty/Year  
No.  
Parts No.  
Name  
Q’ty  
Remarks  
/Unit  
per  
per  
per  
500  
1000  
2000  
1
2
41484401  
Cover Assy-Stacker  
LED Assy 1200dpi  
LED Assy 600dpi  
LED Assy Spring  
LED control PWB  
Lever Stacker Full  
Cover Assy-Inn(Sub)  
LED Harness M  
1
4
4
8
1
1
1
1
1
1
1
4
1
1
1
1
1
4
1
19  
3
12  
12  
24  
3
6
24  
24  
48  
6
12  
48  
48  
96  
12  
12  
12  
12  
12  
12  
12  
48  
12  
12  
12  
12  
12  
48  
12  
-
41502301  
41502302  
40861001  
41257902  
41349801  
41487101  
41514103  
41514104  
41514101  
ODA/OEL/APS  
ODA/OEL/APS  
3
4
5
6
7
8
9
3
6
3
6
3
6
LED Harness C  
3
6
LED Harness K  
3
6
10 41514102  
11 41703701  
12 41484501  
13 40866207  
40866211  
LED Harness Y  
3
6
Sensor-Assy-Tonner  
Control Panel Assy  
Control Panel Bezel  
Control Panel Bezel  
12  
3
24  
6
3
6
1200dpi  
600dpi  
3
6
14 2381005P0024  
15 41484701  
16 2251001P0260  
17 40255202  
Control Panel Tape Harness  
Eject Guide Assy  
3
6
3
6
26pin LED Connector  
Motor-Fan(80-25)  
12  
3
24  
6
18 4PB4083-2500P008 Screw (T3×8)  
-
-
41388601TH Rev.2  
145 /  
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22  
12  
7
26  
39  
39  
39  
27  
2
25  
24  
37  
40  
4
39  
39  
1
37  
1
20  
39  
6
23  
21  
42  
18  
5
17  
8
13  
10  
11  
19  
39  
39  
9
39  
16  
3
39  
Figure 8-3-1/2  
41388601TH Rev.2  
146 /  
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27  
29  
30  
37  
37  
28  
37  
37  
33  
37  
37  
35  
37  
31  
43  
37  
36  
34  
37  
32  
37  
41  
37  
37  
38  
37  
37  
Figure 8-3-2/2  
41388601TH Rev.2  
147 /  
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Table 8-3-1/2  
Printer Unit Chassis  
Recommended Q’ty/Year  
No.  
Parts No.  
Name  
Q’ty  
Remarks  
/Unit  
per  
per  
per  
500  
1000  
2000  
1
2
3
4
5
6
7
8
9
41189701  
Drum contact Assy  
4
1
1
1
1
1
1
1
1
1
1
1
1
12  
3
3
3
3
3
3
3
3
3
3
3
3
24  
6
6
6
6
6
6
6
6
6
6
6
6
48  
12  
12  
12  
12  
12  
12  
12  
12  
12  
12  
12  
12  
41483201  
41483301  
40845401  
41187101  
41483401  
41483701  
41491001  
41744001  
Registration Roller Assy (A)  
Registration Roller Assy (B)  
Registration Drive Gear (A)  
Registration Clutch  
Registration Motor Assy  
Motor-Assy-Fan  
Color Registration Sensor Assy  
Registration Shutter Solenoid  
Registration Shutter  
10 41743901  
11 41744601  
12 41486801  
13 41483101  
14  
Registration Shutter Spring  
Duplex Guide Assy  
Printer Unit Chassis  
15  
16 40841601  
17 41578501  
18 40841801  
19 41258301  
20 41486601  
21 41393901  
22 41095901  
23 51607301  
24 51609401  
25 41073601  
26 40841301  
27 41628301  
28 41483901  
29 40841401  
30 41483801  
31 41484001  
32 40850201  
33 41303401  
41303501  
Entrance Cassette Sensor Actuator  
Entrance MT Sensor Actuator  
Entrance Belt Sensor Actuator  
Board R71  
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
3
3
3
3
3
3
3
3
3
3
3
6
3
3
3
3
3
3
3
3
6
6
6
6
6
6
6
6
6
6
6
12  
6
6
6
6
6
6
6
6
12  
12  
12  
12  
12  
12  
12  
12  
12  
12  
12  
24  
12  
12  
12  
12  
12  
12  
12  
12  
Magnet-Assy-Dup  
Solenoid sheet Assy  
Roller Feed(C)  
Fuser Exit Roller Bushing (L)  
Fuser Exit Roller Bushing (R)  
Exit Sensor Assy  
Fuser Latching Handle (L)  
Fuser Latching Handle Spring  
Transfer Belt Motor Assy  
Fuser Latching Handle (R)  
Main Motor Assy  
Left Plate Assy  
Contact Assy  
PWR Unit-ACDC Switch 120V  
PWR Unit-ACDC Switch 230V  
Power Unit(High-Voltage)  
34 40737601  
41388601TH Rev.2  
148 /  
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Table 8-3-2/2  
Q’ty  
Recommended Q’ty/Year  
No.  
Parts No.  
Name  
Remarks  
/Unit  
per  
per  
per  
500  
1000  
2000  
35 56732302  
36 41500101  
HV Tape Harness  
Power Supply Insulation  
1
1
3
3
-
6
6
-
12  
12  
-
37 4PB4013-3100P006 Screw (M3×6)  
38 PSW4-8C Screw (M4×8)  
39 4PB4083-2500P008 Screw (T3×8)  
26  
1
-
-
-
29  
2
-
-
-
40 41346301  
41 41589501  
42 40197103  
43 41431602  
Transfer Contact Assy  
6
3
3
3
12  
6
6
6
24  
12  
12  
12  
Power Supply Insulation(HV)  
FAN-Power Supply (PUSH)  
FAN-Left Plate (PUSH)  
1
1
1
41388601TH Rev.2  
149 /  
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12  
9
11  
12  
12  
12  
11  
12  
11  
8
12  
11  
11  
11  
11  
12  
12  
1
12  
12  
7
7
9
10  
7
10  
11  
7
12  
10  
Figure 8-4-1/2  
41388601TH Rev.2  
150 /  
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12  
13  
12  
6
2
5
2
12  
12  
4
2
18  
12  
12  
12  
13  
12  
12  
3
17  
12  
15  
16  
13  
Figure 8-4-2/2  
41388601TH Rev.2  
151 /  
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Table 8-4  
Paper Tray Guide  
Recommended Q’ty/Year  
No.  
Parts No.  
Name  
Q’ty  
Remarks  
/Unit  
per  
per  
per  
500  
1000  
2000  
1
2
3
4
5
6
7
8
9
41481301  
Guide-Assy-R-1st  
1
1
3
3
3
3
3
3
12  
3
3
-
6
6
6
6
6
6
24  
6
6
-
12  
12  
12  
12  
12  
12  
48  
12  
12  
-
41481701  
41488401  
41529101  
41515701  
41503001  
41502601  
41515801  
56731640  
Roller-Feed  
Roller-Feed-A3  
Motor-Pulse(Hop)  
Board-A73  
1
1
1
Gear Assy-Clutch(2pin)  
Rubber Foot  
1
4
Paper Size Sensing PWB  
Connector  
1
1
10 4PB4013-3101P006 Screw (T4×6)  
11 4PB4013-3101P008 Screw (T4×8)  
12 4PB4013-3100P008 Screw (M3×8)  
13 4PB4083-2500P010 Screw T3×10  
14  
4
27  
18  
4
-
-
-
-
-
-
-
-
-
15 PSW2W3-10C  
16 PSW2W3-16C  
17 PSW2W3-20C  
18 41488301  
Screw  
2
1
3
1
-
-
-
-
-
-
Screw  
Screw  
-
-
-
Gear Assy-Clutch(3pin)  
3
6
12  
41388601TH Rev.2  
152 /  
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3
3
2
3
3
3
3
3
3
3
3
D
C
B
A
4
4
4
4
D
4
C
3
E
B
4
3
E
3
A
1
4
3
3
4
4
Figure 8-5  
41388601TH Rev.2  
153 /  
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Table 8-5  
Duplex Unit  
Recommended Q’ty/Year  
No.  
Parts No.  
Name  
Q’ty  
Remarks  
/Unit  
per  
per  
per  
500  
1000  
2000  
1
41178201  
Duplex Assy  
Duplex Assy  
Duplex Assy  
1
1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
ODA  
OEL  
APS  
41178203  
41178207  
1
2
3
4
4PB4043-4718P001 Screw (SP3×10)  
4PB4083-2500P008 Screw (T3×8)  
4PB4013-3100P006 Screw (M3×6)  
2
21  
9
41388601TH Rev.2  
154 /  
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21  
9
20  
22  
23  
24  
1
7
25  
7
7
9
7
19  
Figure 8-6-1/2  
41388601TH Rev.2  
155 /  
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12  
12  
12  
6
2
5
2
12  
12  
2
6
18  
*
12  
*
*
4
12  
*
12  
*
*
*
3
*
17  
12  
12  
*
15  
*
16  
13  
These parts are not attached to the lowest tray.  
*
Figure 8-6-2/2  
41388601TH Rev.2  
156 /  
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High Capacity Tray Unit, 2nd/3rd Tray Unit  
Recommended Q’ty/Year  
No.  
Parts No.  
Name  
Q’ty  
Remarks  
/Unit  
per  
per  
per  
500  
1000  
2000  
1
2
3
4
5
6
7
8
9
41481301  
Guide R Assy  
Roller-Feed  
1
3
1
1
1
1
4
3
9
6
18  
6
12  
36  
12  
12  
12  
12  
48  
41481701  
41488401  
41529101  
41515701  
41503001  
41502601  
Roller-Feed (A3)  
Motor-Hopping  
Board A73  
3
3
6
3
6
Clutch Guide Assy (2 pin)  
Rubber-Foot  
3
6
12  
24  
2201000P140  
Connector  
1
4
3
-
6
-
12  
-
10 4PB4013-3101P006 Screw (T4×6)  
11 4PB4013-3101P008 Screw (T4×8)  
12 4PB4013-3100P008 Screw (M3×8)  
13 4PB4083-2500P010 Screw (T3×10)  
14  
27  
18  
4
-
-
-
-
-
-
-
-
-
15 PSW2W3-10C  
16 PSW2W3-16C  
17 PSW2W3-20C  
18 41488301  
19 41547805  
20 41503601  
21 41503801  
22 41463003  
23 41515801  
24 41503701  
25 41481201  
Screw  
2
1
3
1
1
1
1
1
1
1
1
-
-
-
Screw  
-
-
-
Screw  
-
-
-
Clutch Guide Assy (3 pin)  
Cassette Assy  
Cover-Side L  
Cover-Rear  
3
3
3
3
3
3
3
3
6
6
6
6
6
6
6
6
12  
12  
12  
12  
12  
12  
12  
12  
Board V73  
Paper Size sensor  
Cover-Side R Sub  
Cover-Side R Assy  
41388601TH Rev.2  
157 / 157  
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