Oki C9850 Maintenance Manual page 7

4. Parts Replacement ........................................................................................91
4.1 Precautions When Replacing Parts ................................................................................91
4.2 Parts Layout .....................................................................................................................93
4.3 Parts Replacement Method ...........................................................................................109
4.3.1 Cover-Rear, Cover-Side (R), and Cover-Side (R) Rear.......................................... 110
4.3.2 Cover-Side (L) and Cover Assy-Front..................................................................... 111
4.3.3 Stacker Assy-FU..................................................................................................... 112
4.3.4 Cover Assy-OP Panel, Cover-Guard (R), Cover-Guard (Front)
and Cover-Guard (L)............................................................................................... 113
4.3.5 OP PCB .................................................................................................................. 114
4.3.6 Cover Assy-Top....................................................................................................... 115
4.3.7 FAN-PCB-Assy, CU-Board-Assy and S2V-PU-Board ............................................ 116
4.3.8 Job-Offset-Assy 723 and Basket-Assy ................................................................... 117
4.3.9 Plate Top Assy ........................................................................................................ 119
4.3.10 Eject-Assy ...............................................................................................................120
4.3.11 Motor-Pulse-Belt and Sensor-Resist-Assy ............................................................. 121
4.3.12 FDR Unit-MPT ........................................................................................................122
4.3.13 FDR Unit-Resist......................................................................................................123
4.3.14 Duct Assy................................................................................................................ 124
4.3.15 HV-Assy ..................................................................................................................125
4.3.16 Power Unit ..............................................................................................................126
4.3.17 Low Voltage Power Source Assy and Motor-FAN ..................................................127
4.3.18 Belt-Assy.................................................................................................................128
4.3.19 Fuser Unit-LBT........................................................................................................129
4.3.20 Unit-Duplex .............................................................................................................130
4.3.21 Paper Feed Roller................................................................................................... 131
4.3.22 MPT Feed Roller.....................................................................................................132
5. Adjustment ................................................................................................... 133
5.0 System Maintenance Menu ..........................................................................................133
5.0.1 ID Check Pattern Print ("TEST PRINT MENU" Item) .............................................135
5.1 Maintenance Menu and Its Function ............................................................................138
5.1.1 Maintenance Menu ................................................................................................138
5.1.2 Engine Maintenance Mode ....................................................................................138
5.1.3 Various Printing Methods with a Stand-Alone Printer Coming with a Controller ....158
5.2 Adjustment After Replacing Parts .................................................................................159
5.2.1 Precautions when Replacing the Engine Control PCB...........................................159
5.2.2 Precautions Upon EEPROM Replacement ............................................................159
5.2.3 CU PCB of 1200 dpi Printer and Replacement of Mounted Components .............. 161
5.2.4 Precautions in Key Chip Replacement (1200 dpi printer) .......................................162
5.2.5 Precautions in EEPROM Replacement (1200 dpi printer) ......................................163
5.2.6 Precautions in HDD Replacement (1200 dpi printer)..............................................164
5.2.7 Product Code of Maintenance HDD (1200 dpi printer) ...........................................165
5.2.8 Setup of EEPROM after replacement of TBX PCB .................................................166
5.2.9 Setup of destination.................................................................................................167
5.3 Density Correction .........................................................................................................168
5.4 Paper Thickness Detection/Sensitivity Correction .......................................................169
43627911TH Rev. 3
Oki Data CONFIDENTIAL
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