Message listing ................................................................................................................. 359
Formatter lights .................................................................................................................................. 395
Embedded HP Jetdirect LEDs .......................................................................................... 395
Heartbeat LED .................................................................................................................. 396
Accessory lights (4700 models) ........................................................................................................ 397
Interpreting stapler/stacker indicator light codes .............................................................. 397
Replacement parts configuration ....................................................................................................... 400
Formatter and DC controller ............................................................................................. 400
Formatter (new or previously installed in another printer) ................................................ 400
DC controller (new or previously installed in another printer) .......................................... 401
Formatter and firmware compact flash ............................................................................. 401
Paper path troubleshooting ............................................................................................................... 402
Jams .................................................................................................................................. 402
Jam locations .................................................................................................................... 402
Jam locations by error message ....................................................................................... 405
Jam recovery .................................................................................................................... 406
To disable paper jam recovery ......................................................................... 407
Avoiding jams .................................................................................................................... 407
Solving repeated jams ...................................................................................................... 408
Persistent jams ................................................................................................................. 408
Basic troubleshooting for jams ......................................................................... 408
Data collection .................................................................................................. 409
General paper path troubleshooting ................................................................ 409
Paper path checklist ......................................................................................... 410
Jams in Tray 1 .................................................................................................. 410
Jams in Tray 2 .................................................................................................. 411
Jams in the paper path ..................................................................................... 412
Jams in the top cover ....................................................................................... 412
Jams in the duplex path ................................................................................... 413
Common causes of paper jams ........................................................................................ 414
Paper jams ....................................................................................................... 414
Clearing jams .................................................................................................................... 415
Jam in Tray 1 ................................................................................................... 415
Jam in Tray 2 or optional trays ......................................................................... 416
Jams in top cover area ..................................................................................... 417
Clearing a jam in the top cover area ............................................... 418
Clearing other jams .......................................................................................... 420
Jams in the stapler/stacker (4700 models) ...................................................... 423
Staple jams ....................................................................................................... 429
Paper transport troubleshooting ........................................................................................................ 432
Multiple pages are fed ...................................................................................................... 432
Media is wrinkled or folded ............................................................................................... 432
Paper is skewed ................................................................................................................ 433
Image formation troubleshooting ....................................................................................................... 434
Print quality troubleshooting tools ..................................................................................... 434
Print quality problems associated with media .................................................................. 434
Overhead transparency defects ........................................................................................ 435
Print quality problems that are associated with the environment ..................................... 436
Print quality problems that are associated with jams ....................................................... 436
Print quality troubleshooting pages .................................................................................. 436
xii ENWW
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