Paper-top sensor ............................................................................................................160
Fuser-wrap sensor ..........................................................................................................161
250-sheet feeder pickup roller ........................................................................................162
500-sheet feeder pickup roller ........................................................................................163
6 Troubleshooting
Chapter contents....................................................................................................................167
Basic troubleshooting ............................................................................................................169
Clearing jams ........................................................................................................................171
Where to look for jams ....................................................................................................171
To clear jams from inside the printer ..............................................................................171
To clear jams from input areas .......................................................................................172
To clear jams from output areas .....................................................................................174
Control panel light messages ................................................................................................176
Supplies Status lights .....................................................................................................177
Printer Status lights ........................................................................................................182
Solving image-quality problems ............................................................................................190
Print-quality checklist ......................................................................................................190
Solving image-quality problems (all print jobs) ...............................................................190
Solving image-quality problems (color print jobs) ..........................................................200
Resolving problems that generated messages .....................................................................204
Messages for both Windows and Macintosh .................................................................204
Messages for Windows only ...........................................................................................204
Resolving problems that did not generate messages ..........................................................206
Troubleshooting checklist ..............................................................................................206
Checking the network ....................................................................................................207
Solving general printing problems ..................................................................................207
Solving PostScript (PS) errors ........................................................................................212
Solving common Macintosh problems ............................................................................213
Manually rotating the print-cartridge carousel ................................................................216
Functional checks .................................................................................................................218
Engine test ......................................................................................................................218
High-voltage power-supply check ..................................................................................219
Paper-path check ...........................................................................................................219
Service mode functions .........................................................................................................221
Cold reset .......................................................................................................................221
NVRAM initializer ............................................................................................................221
Error report......................................................................................................................222
Super NVRAM initialization.............................................................................................222
Network card cold reset..................................................................................................222
Using PJL commands .....................................................................................................223
Troubleshooting tools ............................................................................................................225
Demo page .....................................................................................................................225
Configuration page .........................................................................................................225
Supplies Status page ......................................................................................................226
Repetitive image defects ................................................................................................227
General timing charts .....................................................................................................228
Locations of connectors ..................................................................................................230
Dc controller connections ...............................................................................................233
Main wiring diagram .......................................................................................................234
HP LaserJet Toolbox .............................................................................................................236
To view the HP LaserJet Toolbox ..................................................................................236
7 Parts and diagrams
Chapter contents ..................................................................................................................237
vi ENWW
To Next Page
Loading...