HP LaserJet 3050 - Install ADF Output Support; Install Print Cartridge

Main motor ....................................................................................................................... 190
Fuser ................................................................................................................................ 192
Paper-pickup assembly ................................................................................................... 194
6 Troubleshooting
Troubleshooting process .................................................................................................................. 196
Troubleshooting checklist ................................................................................................ 196
Control-panel messages .................................................................................................................. 199
Alert and warning messages .......................................................................................... 199
Alert and warning message tables .................................................................. 199
Critical error messages .................................................................................................... 205
Critical error message-tables .......................................................................... 205
Event-log codes ............................................................................................................... 209
Jams ................................................................................................................................................. 211
Causes of jams ................................................................................................................ 211
Tips to avoid jams ........................................................................................................... 211
Where to look for jams ..................................................................................................... 212
Print cartridge area .......................................................................................................... 212
Input trays ........................................................................................................................ 214
Output bin ........................................................................................................................ 215
Solving print paper-feed problems ................................................................................... 216
Paper-feed solutions, printing ......................................................................... 216
Jams occur in the automatic document feeder (ADF) ..................................................... 218
Solving ADF paper-feed problems .................................................................................. 221
Paper-feed solutions, scanning/copying ......................................................... 221
Print image-quality problems ............................................................................................................ 223
Checking the print cartridge ............................................................................................ 223
To redistribute the toner in the print cartridge ................................................. 223
Solving print image-quality problems ............................................................................... 224
Print image-quality solutions ........................................................................... 224
Scan/copy image-quality problems ................................................................................................. 232
Scan/copy image-quality solutions .................................................................................. 232
ADF problems .................................................................................................................................. 239
Fax troubleshooting (HP LaserJet 3050/3055 all-in-one) ................................................................. 240
General fax troubleshooting ............................................................................................. 240
Fax receive troubleshooting ............................................................................................. 242
Fax send troubleshooting ................................................................................................ 244
DSL problems .................................................................................................................. 245
PABX line problems ........................................................................................ 245
Control-panel-display problems ........................................................................................................ 246
Functional checks ............................................................................................................................. 247
Control-panel test ............................................................................................................ 247
Half self-test functional check ......................................................................................... 247
To perform a half self-test check ..................................................................... 248
To perform other checks ................................................................................. 248
Drum-rotation functional check ....................................................................................... 248
High-voltage contacts check ............................................................................................ 249
To check the print-cartridge contacts ............................................................ 249
To check the high-voltage connector pins ...................................................... 250
Service-mode functions .................................................................................................................... 251
viii ENWW