Oki MC561 User manual







Maintenance Manual
12610B









MC361/MC561/CX2731MFP










Copyright Information
Copyright © 2007 by Oki Data. All Rights Reserved
Disclaimer
Every effort has been made to ensure that the information in this document is complete, accurate, and up-to-
date. The manufacturer assumes no responsibility for the results of errors beyond its control. The
manufacturer also cannot guarantee that changes in software and equipment made by other manufacturers and
referred to in this guide will not affect the applicability of the information in it. Mention of software products
manufactured by other companies does not necessarily constitute endorsement by the manufacturer.
While all reasonable efforts have been made to make this document as accurate and helpful as possible, we
make no warranty of any kind, expressed or implied, as to the accuracy or completeness of the information
contained herein.
The most up-to-date drivers and manuals are available from the web site:
http://www.okiprintingsolutions.com

44473001TH Rev.1 3 /
Oki Data CONFIDENTIAL
This manual explains the maintenance methods of MC561/MC361/MC351/ES5461/ES3461/
ES3451/CX2731.
This manual is prepared for the maintenance person. In regard to the handling methods of
MC561/MC361/MC351/ES5461/ES3461/ES3451/CX2731, please refer to the User’s Manual.
Note! • Contents of this manual is subject to change without notice.
• While all reasonable efforts have been made to make this document
as accurate and helpful as possible, we make no warranty of any kind,
expressed or implied, as to the accuracy of the information contained
herein. Oki Data assumes no responsibility to the damages caused or
claimed to have been caused by the user as a result of repair, adjustment
and/or change using this manual.
• Parts of this product are delicate and can be damaged unless properly
handled. We strongly recommend the user to maintain the product at the
hand of the registered maintenance person of our company
• Before starting the maintenance work, please neutralize the static electricity.
PREFACE
はじめに
Risk of explosion if battery is replaced by an incorrect type.
Battery of the printer need not to be replaced. Do not touch the
battery.
Replace the whole board to replace the SU main board.
In the case of replacing batteries at board repairs, replace with the
specified type ones. Installation of another type batteries may result in
explosion.
Caution for used batteries are as follows; do not recharge, force open,
heat or dispose of in fire.
When open the printer cover, do not touch the fuser unit.You may get
burned.
Do not throw toner cartridges, or image drum cartridges into fire.You
may get burned by dust explosion.
We do not guarantee operations when UPS (Uninterruptible Power
Supply) is used.
Do not use UPS.
It may cause fire.
Do not go near an ejection area while the power is on and in printing.
You may get injured.

44473001TH Rev.1 4 /
Oki Data CONFIDENTIAL
CONTENTS
CONTENTS
1. CONFIGURATION.....................................................................7
1.1 System configuration .........................................................................................8
1.2 Structure of MFP ..............................................................................................10
1.3 Offer of Options ................................................................................................11
1.4 Specifications ...................................................................................................12
1.5 Interface specifications ....................................................................................30
1.5.1 USB Interface Specification.........................................................................30
1.5.1.1 Outline of USB Interface......................................................................30
1.5.1.2 USB Interface Connector and Cable...................................................30
1.5.1.3 USB Interface Signal...........................................................................30
1.5.2 Network Interface Specification...................................................................31
1.5.2.1 Outline of Network Interface................................................................31
1.5.2.2 Network Interface Connector and Cable.............................................31
1.5.2.3 Network Interface Signal.....................................................................31
1.5.3 Telephone Line Interface Specification (Only MC561/MC361)....................32
1.5.3.1 Outline of telephone Line Interface .....................................................32
1.5.3.2 Telephone Line Interface Connector and Cable..................................32
1.5.3.3 Telephone Line Interface signal...........................................................32
1.5.3.4 USB Host Interface..............................................................................32
2. DESCRIPTION OF OPERATION............................................33
2.1 Electrophotographic process mechanism ........................................................34
2.2 Printing process................................................................................................38
2.3 Image Scanning process ..................................................................................50
3. MFP INSTALLATION...............................................................58
3.1 Precautions and Prohibition..............................................................................59
3.2 MFP Unpacking Procedure ..............................................................................60
3.3 MFP Installation Instructions ............................................................................61
3.4 Packed Units and Attachments ........................................................................62
3.5 Assembly Procedure ........................................................................................63
3.5.1 MFP Main Body ..........................................................................................63
3.5.2 Power Cable Connection.............................................................................70
3.5.3 Installation of Optional Components ...........................................................71
3.5.3.1 Second Tray Unit .................................................................................71
3.5.3.2 Extension Memory Installation............................................................74
3.5.3.3 16GB SD Memory card (for MC561 only) ...........................................75
3.6 Configuration Page Print...................................................................................78
3.7 Network Information Print .................................................................................80
3.8 Connection Procedures ....................................................................................81
3.9 Checking of User Paper....................................................................................85
4.REPLACEMENT OF PARTS....................................................86
4.1 Notes on replacement of parts..........................................................................87
4.2 Part replacement procedure .............................................................................89
4.2.1 Belt unit .......................................................................................................89
4.2.2 Fuser unit ....................................................................................................90
4.2.3 Left side cover.............................................................................................90
4.2.4 Right side cover...........................................................................................91
4.2.5 CU/PU PCB and low-voltage power supply.................................................92
4.2.6 Front cover .................................................................................................94
4.2.7 Scanner unit................................................................................................96
4.2.7.1 Tray-assy-document / Cover-ADF-R-assy...........................................97
4.2.7.2 ADF-unit..............................................................................................98
4.2.7.3 Sheet-document / Paper-weight-assy / Spring-PW-ADF.....................99
4.2.7.4 Hinge-assy-L / Hinge-assy-R ............................................................100

44473001TH Rev.1 5 /
Oki Data CONFIDENTIAL CONTENTS
4.2.7.5 Cover-ADF-F / Guide-assy-exit-sub / ADF-assy /
ADF-board (FX750)...........................................................................101
4.2.7.6 Cover-assy-top-ADF / Guide-assy / Roller / Motor / Clutch /
Solenoid ............................................................................................103
4.2.7.7 Guide-A-sub / Frame-assy-separator / Spring-separator /
Rubber-friction...................................................................................104
4.2.7.8 Cable (ADF-Rev SNS).......................................................................104
4.2.7.9 Cable (ADF-Reg SNS)......................................................................105
4.2.7.10 Frame-assy-OP.................................................................................105
4.2.7.11 Frame-OP-panel / OPE board (MC561)............................................106
4.2.7.12 Frame-OP-panel / OPE board (MC361)............................................106
4.2.7.13 Frame-OP-panel / OPE board (MC351)............................................107
4.2.7.14 LCD-assy...........................................................................................107
4.2.7.15 Frame-assy-FB..................................................................................108
4.2.8 Face-up tray ..............................................................................................110
4.2.9 Rear cover.................................................................................................110
4.2.10 LED assembly. and LED assembly springs...............................................111
4.2.11 Image drum fan and ZHJ board ................................................................111
4.2.12 Top cover assembly...................................................................................112
4.2.13 Top cover and LED head cable assembly.................................................112
4.2.14 MPT assembly...........................................................................................113
4.2.15 Front fan, hopping motor, rear fan, image drum motor
and cover-open switch...............................................................................114
4.2.16 High-voltage power supply board..............................................................115
4.2.17 Guide-ejection assembly, fuser connector assembly and
color-registration assembly .......................................................................116
4.2.18 Frame-MPT assembly and feeder assembly.............................................117
4.2.19 Side-L assembly, side-R assembly and base assembly............................118
4.2.20 Feed rollers ...............................................................................................119
4.3 Locations to lubricate......................................................................................120
4.3.1 ADF...........................................................................................................121
4.3.2 Printer........................................................................................................128
5. MAINTENANCE MENUS......................................................139
5.1 Maintenance Menu .........................................................................................140
5.2 Service Bit Menu.............................................................................................148
5.3 Maintenance Utility..........................................................................................149
5.4 Various printing of the printer unit with controller............................................151
5.5 Switch pressing function when power supply is turned on..............................152
5.6 Settings after Parts Replacement...................................................................153
5.4.1 Notes on CU/PU board replacement.........................................................153
5.7 About the manual setting of density correction...............................................156
6. REGULAR MAINTENANCE..................................................157
6.1 Recommended substitutes .............................................................................158
6.2 Cleaning..........................................................................................................159
6.3 Cleaning LED lens array.................................................................................160
6.4 Cleaning the Paper Feed Roller .....................................................................162
6.5 Cleaning the Paper Feed Rollers for MP Tray.................................................163
6.6 Cleaning Rollers in the ADF ...........................................................................164
6.7 Cleaning the Document Glass........................................................................165
7. TROUBLESHOOTING PROCEDURES................................166
7.1 Precautions prior to repair...............................................................................167
7.2 Items to be checked prior to taking action on abnormal images.....................167
7.3 Precautions when taking action on abnormal images ....................................167
7.4 Preparations for troubleshooting.....................................................................167
7.5 Troubleshooting method..................................................................................168
7.5.1 LCD messages list ....................................................................................168
7.5.2 Service Call List ........................................................................................206
7.5.3 Fax Error List.............................................................................................211
7.5.4 Preparing for troubleshootin......................................................................213

44473001TH Rev.1 6 /
Oki Data CONFIDENTIAL
7.5.5 Image Problem Troubleshooting................................................................246
7.5.6 Response after Flash compulsive initialization..........................................253
7.5.7 Copy Image Abnormality Error Troubleshooting........................................253
7.5.8 Network Troubleshooting...........................................................................255
7.6 Fuse Checking................................................................................................256
8. CONNECTION DIAGRAMS .................................................257
8.1 Check of resistance values ............................................................................258
8.2 Layout of parts ...............................................................................................262
8.3 Firmware revision numbers ............................................................................275
8.3.1 ROM control numbers...............................................................................275
8.3.2 Checking and indication of the revision number .......................................276
8.3.3 Stamp of maintenance board indication ...................................................276

Oki Data CONFIDENTIAL
1.
CONFIGURATION
1.1 System configuration ......................................................................8
1.2 Structure of MFP ..........................................................................10
1.3 Offer of Options ............................................................................11
1.4 Specifications ...............................................................................12
1.5 Interface specifications .................................................................30

44473001TH Rev.1 8 /
Oki Data CONFIDENTIAL 1. CONFIGURATION
Scanner Unit
MHC
CLP
MC561
(MC361/MC351 Not Use)
CD1-ASIC
MFA-ASIC
IMAGE SENSOR FB
MOTOR ADF
MOTOR
MOTOR
DRV IC
ARM9
DDR2-DRAM
(1Gbit)
USB
DEVICE
NAND
Flash DDR2 SDRAM
256MB PHY
MOTOR
DRV x3
LED HEAD
(YMCK)
Printer
Unit
SENSOR
(PU)
LAN SD CARD
DDR2
SDRAM-DIMM
ADC
DAC
ARM7
EMAC
USB Host
SATA
USBD
PPC464
SPI
ROM
USBD
RTC
KEY
LED
LCD(320x128)
LED(Power Save)
KEY(Power Save Key)
LED(Data in Memory)
Microcomputer
Battery
MOTOR
DRV IC
AFE
IC
LED
Enable
SPI
Digital
LVDS I/F
AD
SPI
SSTL2
SD I/F
SSTL2
SPI
USB HS
USB
USB HS Head I/F
Local Bus
UART
SPI
I/O Port
I/O Port
USB HS
SPI ROM
(Program)
USB HOST
(USB Memory) USB HUB
IC
analog
CLK/SP
LED
Drive
Circuit
Clutch/
Solenoid Photo
Interrupter(x4)
Photo
Interrupter
NAND FLASH
(1GBit)
Modem
(SF x 336) FAX
TEL
OPM
FMA
MC561/MC361
(MC351 Not Use)
SDAA
(SFF336)
Clutch/Solenoid
Drive Circuit
MHD
ADF Relay Board
1.1 System configuration
System Configurations of the MFP Unit.
The system configuration of this product is shown in
Figure 1-1-1
Figure 1-1-1

44473001TH Rev.1 9 /
Oki Data CONFIDENTIAL 1. CONFIGURATION
Figure 1-1-2
K toner
sensor
C toner
sensor
Paper
feed
motor
MPT
clutch
ID
motor
Fuser
motor
WR sensor
ID UP/
DOWN sensor
ID
FAN
C LED HEAD
M LED HEAD
Y LED HEAD
K LED HEAD
USB
LAN
CUPU
CD1
ASIC(2/2)
CD1
ASIC(1/2)
EEP
ROM
Flash
ROM
Resident
RAM
Option
RAM
Fuser
Inlet
Low-voltage board
AC-SW
Toner sensor board
High-voltage board
Operator
panel board
Waste toner
sensor board
Color registration
sensor board
Density sensor
2nd TRAY PCB
Belt unit
K-ID C-ID M-ID Y-ID
Rear
cover SW
1st P.E
sensor
Hopping
sensor
Hopping
clutch
Rear
FAN
Front
FAN
1st cassette
sensor
M toner
sensor
Y toner
sensor ID fuse
cut
Belt unit
fuse-cut
Duplex
rear sensor
Belt
thermistor
Duplex
front sensor
IN sensor
Cover-open
SW
EXIT
sensor
Duplex
clutch
Shutter
solenoid BELT
motor
Environmental
sensor
EEP
ROM
High-voltage
I/F
Heater power
3.3V,5V,24V,0VL,0VP
Fuser fuse-cut/upper center/for
compensation/lower thermistor
TAG I/F
CU/PU board
2nd IN
sensor
2nd
paper feed
motor
2nd
hopping
clutch
2nd
registration
clutch
Heater control,
others
2nd P.E
sensor
2nd
hopping
sensor
TAG
board
TAG
board
TAG
board
TAG
board
Registration
clutch
SD memory
card
(MC561 only)
System Configurations of the Printer Unit.
The system configuration of this product is shown in Figure 1-1-2

44473001TH Rev.1 10 /
Oki Data CONFIDENTIAL 1. CONFIGURATION
1.2 Structure of MFP
The insides of MC561/MC361/MC351/ES5461/ES3461/ES3451/CX2731 multi function
printers are composed of the following parts.
• Scanner part
• Electronic photography process part
• Paper path
• Control part (CU part/PU part)
• Power supply parts (high voltage part/low voltage part)
Figure 1-2 shows the composition of the MFP.
Figure 1-2