Name: Oki MB472w
Brand: Oki
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45762101TH Rev.1

4-50

Oki Data CONFIDENTIAL

4.REPLACEMENT OF PARTS

4.2.31 Frame-Assy-Retard, Spring-Retard

(1) Remove the cassette.

(2) Open the Retard-Cover by pushing two tabs in the directions of the arrows.

(3) Remove Frame-Assy-Retard

①

by pushing it in the direction of the arrow.

(Spring-Retard

②

is removed together.)

(4 ) Installing is performed by the inverse procedure with removing.

Retard-Cover

Ta b

①

②

Contents4
Configuration7
System Configuration8
Structure of MFP9
Offer of Options10
Specifications11
Copy Specifications13
Scan Specifications14
FAX Specifications15
Common Specifications15
Report Print16
USB Interface Specification17
USB Interface Connector and Cable17
USB Interface Signal17
Network Interface Basic Specification18
Network Interface Connector and Cable18
Network Interface Signal18
Telephone Line Interface Specification19
USB Host Interface19
Wireless LAN Interface20
Troubleshooting Procedures21
Precautions Prior to Repair22
Items to be Checked Prior to Taking Action on Abnormal Images22
Precautions When Taking Action on Abnormal Images22
Preparations for Troubleshooting22
Troubleshooting Method23
LCD Messages List23
Warning34
Error (Enable to Restore)39
Error (Disable to Restore)47
Service Call List50
Fax Error List53
Email/Internet FAX/FAX Server Error List54
Preparing for Troubleshooting55
LCD Display Trouble56
LCD Displays Nothing56
Checking Connections56
Checking for Short Circuit of Power Supply56
Abnormal MFP Operation after Powered on57
No Operation57
Checking Power Supplies57
Confirmation of the Power Switch LED58
Abnormal Sound59
Checking for Loss of Synchronization of Motor (Driver Failure)59
Checking for Loss of Synchronization of Motor (Load by Consumables)59
Check for Gear Jumping (Load by Consumables)59
Abnormal Odor60
Clearing Paper Jams61
Checking Error Messages61
Error Code 372 (Duplex Paper Jam)62
Error Code 380, 381, 382, 389 (Paper Feed Jam)64
Paper Discharge Unit (Paper Jammed)65
Error Code 390 (Paper Feed Jam (Multipurpose Tray))66
Error Code 391, 392 (Paper Feed Jam)68
Document Jam Occurred69
When You Can See the Document in the Duplex Paper Path69
When You Can See the Document Inside the ADF69
Paper Feed Jam (Error Code 391: 1St Tray)71
Does a Jam Error Occur When Turning on the Power?71
Jam Occurs Immediately after the Paper Feed Is Started. (1St Tray)71
Check the Paper Feed Roller Rotate71
Feed Jam (Error Code: 380, 381)72
Jam Occurs Immediately after the Power Is Turned on72
Jam Occurs Immediately after the Paper Feed Is Started72
Paper Feed Jam (Error Code 390: Multipurpose Tray)73
Check Condition of the Mechanical Parts73
Check Condition of Paper Running Path73
Jam Occurs Immediately after Paper Feed Is Started (Multipurpose Tray)74
Paper Running Jam (Error Code: 381)75
Two-Sided Printing Jam (Error Code: 372)75
Paper Size Error (Error Code: 400)76
Fuser Unit Error (Error Code: 170 to 177)76
Motor Fan Error (Error Code: 122, 127, 128)77
Print Speed Is Slow (Performance Is Low)77
Option Unit Cannot be Recognized78
LED Head Cannot be Recognized. (Error Code: 134)78
Toner Cartridge Cannot be Recognized. (Error Code: 543)79
Fuse Cut Error (Error Code: 153 to 155)80
Humidity Sensor Error (Error Code: 123)81
Print Troubleshooting82
Pale Printing or the Whole Printing Is Faded82
The White Section Is Dirty83
White Paper Is Outputted83
Vertical Black Belt/ Black Line83
In Case of Error Printing84
In Case of Inefficient Fusing84
Vertical White Belt/ White Line84
Response after Flash Compulsive Initialization87
Copy Image Abnormality Error Troubleshooting87
Network Troubleshooting88
Wireless Troubleshooting89
Cannot Print through Wireless Network89
Fuse Checking90
Fuse Errors90
Maintenance Menus91
Service Menu92
Maintenance Menu92
Service Bit Menu99
Additional Fax Setting Menu99
Maintenance Utility100
Adjustment Options in Maintenance Utility100
Self-Diagnostic Mode101
Operator Panel101
How to Select the Menu Items102
Ordinary Self-Diagnostic Mode (Level 1)104
Entering Self-Diagnostic Mode (Level 1)104
Exiting Self-Diagnostic Mode104
Switch Scan Test105
The Sectional View of Only Printer105
SWITCH SCAN Details106
Motor Clutch Test107
Test Print109
Consumable Item Counter Display112
Number of Print Copies Counter Display112
Switching between the Factory Mode and the Shipping Mode113
Self-Diagnostic Function Setting113
LED Head Serial Number Display114
Adjustment at Part Replacement115
EEPROM Data Upload / Download Method115
Switch Pressing Function When Power Supply Is Turned on116
Settings after Parts Replacement117
Notes on CU/PU Board (MRM) Replacement117
Set the CU Serial Number118
Notes on SU Board (Msu)/Scanner Unit Replacement120
Replacement of Parts121
Notes on Replacement of Parts122
Maintenance Tools123
Part Replacement Procedure124
Cover Side (L)124
Cover Side (R)125
Board MRM126
PWR Unit127
Cover Stay(R) / Cover Stay(L)128
Cover Front (Top)129
SW Assy129
Scanner Unit130
Tray-Assy-Document / Cover-ADF-R-Assy132
ADF-Unit133
Sheet-Document / Paper-Weight-Assy / Spring-PW-ADF134
Hinge-Assy-L / Hinge-Assy-R135
Cover-ADF-F / Guide-Assy-Exit-Sub / ADF-Assy / ADF Board (MHD)136
Cover-Assy-Top-ADF / Guide-Assy / Roller / Motor / Clutch / Solenoid138
Guide-A-Sub/Frame-Assy-Separator/Spring-Separator/Rubber-Friction139
Cable (ADF-Rev SNS)139
Cable (ADF-Reg SNS)140
Frame-Assy-OP140
Frame-OP-Panel / OPE Board141
LCD-Assy142
Frame-Assy-FB143
How to Remove Battery (SU Board MSU)145
Frame-Assy-Hopping-ADF146
Plate Stay L / Plate Assy Stay R147
LED Head148
Frame-Assy-TR148
Duplex Belt Assy149
DC Motor149
Hopping Clutch / MPT Clutch / Regist Clutch151
HV-Board / Motor-FAN154
Cover Assy Stacker155
Stacker Cover156
Fuser Assy157
MPT Assy158
Cover Assy Rear159
Guide Eject Lower Assy161
Eject Motor162
Plate Side R Assy / Plate Side L Assy / Front Assy163
Plate Side L Assy164
Plate Side R Assy165
Roller Regist166
Roller Feed Assy166
Lever in Sensor / Lever WR Sensor / Photo Interrupter167
Paper Feeding Roller (Roller-Pick-Up, Roller-Feed-NOW)168
Paper Feeding Roller (Roller-Assy-MPT)169
Frame-Assy-Retard, Spring-Retard170
W-LAN Board ( for Mb472Dnw)171
Lubrication Point172
Printer173
Plate-Assy-Side-L173
Plate-Assy-Side-R173
Frame-Assy. -Hopping174
1 Frame-Assy. -Regist174
Frame-Assy. -Regist175
Front-Assy175
Frame-Assy. -MPT176
Guide-Assy-Eject-U177
Duplex-Assy180
Fuser-Assy180
Printer-Unit181
Cover-Assy-Stacker181
Cassette-Assy (250Sht)182
Scanner183
Mfp Nip-Fn307183
Gear-Idle-Assy183
ADF-Assy184
Hinge-Assy-L/R187
Tray-Assy-Document188
Roller-Assy-Eject-ADF189
Guide-Assy-Top-B190
Guide-Assy-A190
Periodic Maintenance191
Cleaning192
Cleaning of LED Lens Array193
Cleaning the Feed Rollers and the Retard Roller194
Cleaning the MPT Feed Rollers196
Cleaning Rollers in the ADF198
Cleaning the Document Glass199
Connection Diagrams200
Connection Diagram201
Board Layout203
Resistance Value214
Firmware Information216
ROM Control Numbers216
Instruction of FW Update216
Checking and Indication of the Revision Number217
Stamp of Maintenance Board Indication217
Appendix218
List of Initialized Range219

Brand	Oki
Model	MB472w
Category	All in One Printer
Language	English

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