Drum drive motors (Y/C/M/K) ........................................................................................... 298 Power supply fan/shroud (Fan 4) ..................................................................................... 299 Delivery fan/shroud (Fan 3) .............................................................................................. 300 Cartridge fan/shroud (Fan 2) ............................................................................................ 302 Upper exhaust fan (Fan 1) ................................................................................................
305 Sensors and switches ........................................................................................................................ 308 Environment sensor .......................................................................................................... 308 Power switch assembly .................................................................................................... 309 PCBs .................................................................................................................................................. 312 DC controller PCB .............................................................................................................
312 Low-voltage power supply PCB ........................................................................................ 319 Memory controller PCB ..................................................................................................... 321 E label memory contacts and cable .................................................................................. 322 High-voltage power supply PCB ....................................................................................... 324 Toner level detection PCB ................................................................................................
326 High-voltage contacts ....................................................................................................... 326 500-sheet paper feeder ..................................................................................................................... 328 500-sheet paper feeder right cover .................................................................................. 329 500-sheet paper feeder rear cover ................................................................................... 329 500-sheet paper feeder left cover .....................................................................................
330 500-sheet paper feeder front cover .................................................................................. 331 500-sheet paper pickup drive assembly ........................................................................... 333 500-sheet paper feeder lifter drive assembly ................................................................... 337 500-sheet paper feeder pickup rollers .............................................................................. 339 Stapler/stacker (4700 models) ..........................................................................................................
340 Remove the stapler/stacker from the printer .................................................................... 340 Staple cartridge left cover ................................................................................................. 341 Output tray ........................................................................................................................ 341 Left cover .......................................................................................................................... 342 Top cover ..........................................................................................................................
342 Right cover ........................................................................................................................ 344 Staple cartridge ................................................................................................................. 346 Stapler/stacker PCB .......................................................................................................... 347 Stapler/stacker unit assembly 24v 2.5 amp ...................................................................... 348 Duplexer ............................................................................................................................................
349 Top duplexing assembly ................................................................................................... 349 Duplex tray ........................................................................................................................ 349 7 Troubleshooting Introduction ........................................................................................................................................ 352 Troubleshooting process ...................................................................................................................
354 Pre-troubleshooting checklist ............................................................................................ 354 Troubleshooting checklist ................................................................................................. 355 Troubleshooting flowchart ................................................................................................. 356 Power-on checks .............................................................................................................. 357 Power-on troubleshooting overview .................................................................
357 Control panel messages .................................................................................................................... 359 Warning messages ........................................................................................................... 359 Error messages ................................................................................................................. 359 Critical error messages ..................................................................................................... 359 ENWW xi