HP LasetJet M1120

Control-panel assembly ..................................................................................................... 58
Scanner assembly ............................................................................................................. 60
Product base ...................................................................................................................................... 65
Print cartridge .................................................................................................................... 65
Separation pad .................................................................................................................. 66
Pickup roller ....................................................................................................................... 67
Scanner cushions .............................................................................................................. 70
Media input tray ................................................................................................................. 71
Transfer roller .................................................................................................................... 73
Side covers ........................................................................................................................ 74
Print-cartridge door ............................................................................................................ 76
Rear cover and fuser cover ............................................................................................... 77
Front cover ......................................................................................................................... 79
Formatter ........................................................................................................................... 81
Power supply ..................................................................................................................... 82
Scanner support frame ...................................................................................................... 86
Laser/scanner assembly .................................................................................................... 89
Main motor ......................................................................................................................... 93
Fuser .................................................................................................................................. 96
Paper-pickup assembly ................................................................................................... 100
Drive-gear assembly and drive belt ................................................................................. 103
6 Problem solve
Problem-solving checklist ................................................................................................................. 106
Control-panel messages .................................................................................................................. 108
Alert and warning messages .......................................................................................... 108
Alert and warning message tables .................................................................. 108
Critical error messages .................................................................................................... 109
Critical error message-tables .......................................................................... 109
Clear jams ........................................................................................................................................ 111
Causes of jams ................................................................................................................ 111
Where to look for jams ..................................................................................................... 112
Clear jams from the input-tray areas ............................................................................... 112
Clear jams from the output bin ......................................................................................... 115
Clear jams from the print-cartridge area .......................................................................... 116
Avoid repeated jams ....................................................................................................... 117
Print problems .................................................................................................................................. 118
Print-quality problems ...................................................................................................... 118
Improve print quality ........................................................................................ 118
Print-quality settings ....................................................................... 118
Identify and correct print defects ..................................................................... 119
Print-quality checklist ...................................................................... 119
General print-quality issues ............................................................ 120
Scan problems ................................................................................................................................. 124
Solve scanned-image problems ...................................................................................... 124
Scan-quality problems ..................................................................................................... 126
Prevent problems ............................................................................................ 126
Solve scan-quality problems ........................................................................... 126
Copy problems ................................................................................................................................. 127
Prevent problems ............................................................................................................. 127
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