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Left cover ........................................................................................................ 334
Pickup unit (middle cassette) .......................................................................... 335
Pickup unit (lower cassette) ............................................................................ 336
Pickup unit (upper cassette) ............................................................................ 336
Input tray is not attached ................................................................ 336
Input tray is attached ...................................................................... 337
Auto-close unit ................................................................................................ 339
Pickup motor ................................................................................................... 339
Paper-feeder driver PCA ................................................................................. 339
7 Solve problems
Troubleshooting process .................................................................................................................. 342
Determine the problem source ........................................................................................ 342
Pre-troubleshooting checklist .......................................................................... 342
Troubleshooting checklist ................................................................................ 343
Troubleshooting flowchart ............................................................................... 344
Power subsystem ............................................................................................................ 345
Power-on checks ............................................................................................. 345
Power-on troubleshooting overview ............................................... 345
Tools for troubleshooting .................................................................................................................. 347
Internal print-quality test pages ........................................................................................ 347
Diagnostics page ............................................................................................. 347
Configuration pages ........................................................................................ 348
Configuration page ......................................................................... 348
HP embedded Jetdirect page ......................................................... 350
Embedded protocol page ............................................................... 351
Finding important information on the configuration pages .............. 352
Solve performance problems ........................................................................................................... 353
Solve connectivity problems ............................................................................................................. 354
Solve direct-connect problems ........................................................................................ 354
Solve network connectivity problems ............................................................................... 354
Solve network printing problems ..................................................................... 354
Verify communication over the network .......................................................... 355
Control-panel message types ........................................................................................................... 356
Control-panel messages .................................................................................................................. 357
Event log messages ......................................................................................................................... 422
Print an event log ............................................................................................................. 422
Show an event log ........................................................................................................... 422
Sample event log ............................................................................................................. 423
Clear the event log ........................................................................................................... 423
Event log message .......................................................................................................... 424
Paper-handling problems ................................................................................................................. 428
Jams ................................................................................................................................ 428
ENWW xi