Rear-upper cover ............................................................................................................. 143
Rear door and rear-lower cover ....................................................................................... 145
Scanner assembly ........................................................................................................... 147
Top cover ......................................................................................................................... 149
Internal assemblies .......................................................................................................................... 151
Print-cartridge drawer ...................................................................................................... 151
Main motor ....................................................................................................................... 154
Speaker (fax/memory-card models only) ......................................................................... 155
Intermediate transfer belt (ITB) ........................................................................................ 156
Reinstall the ITB .............................................................................................. 159
DC controller PCA ........................................................................................................... 161
Special considerations .................................................................................... 161
Remove the DC controller PCA ...................................................................... 161
Formatter and fax card PCAs .......................................................................................... 165
Special considerations .................................................................................... 165
Remove the formatter PCA ............................................................................. 165
Fuser motor ..................................................................................................................... 168
Power supply (high-voltage) ............................................................................................ 169
Power supply (low voltage) .............................................................................................. 173
Reinstall the power supply (low voltage) ......................................................... 179
Power supply (fuser) ........................................................................................................ 180
Fuser ................................................................................................................................ 183
7 Problem solve
Menu map ........................................................................................................................................ 188
Troubleshooting process .................................................................................................................. 189
Pre-troubleshooting checklist .......................................................................................... 189
Power-on checks ............................................................................................................. 190
Troubleshooting tools ....................................................................................................................... 191
LED diagnostics ............................................................................................................... 191
Network LEDs (network models only) ............................................................. 191
Control panel LEDs ......................................................................................... 191
Memory card LED (fax/memory-card models only) ......................................... 191
Control-panel diagnostics ................................................................................................ 192
Diagrams ......................................................................................................................... 193
Block diagrams ................................................................................................ 193
Scanner and automatic document feeder (ADF) assemblies ......... 193
Major components .......................................................................... 195
Solenoid, sensors, and motors ....................................................... 197
Rollers ............................................................................................ 198
PCAs .............................................................................................. 199
Interface ports ................................................................................................. 200
DC controller PCA ........................................................................................... 201
viii ENWW
