HP LasetJet M1120

Install the print cartridge .................................................................................................... 21
3 Maintenance
Manage supplies ................................................................................................................................ 24
Life expectancies of supplies ............................................................................................. 24
Check and order supplies .................................................................................................. 24
Store supplies .................................................................................................................... 24
Replace supplies ............................................................................................................... 25
Print cartridge .................................................................................................... 25
HP policy on non-HP supplies ........................................................................................... 26
HP fraud hotline ................................................................................................................. 27
Clean the product ............................................................................................................................... 28
Clean the exterior .............................................................................................................. 28
Clean the flatbed scanner glass ........................................................................................ 28
Clean the lid backing ......................................................................................................... 28
Clean the paper path ......................................................................................................... 29
Management tools .............................................................................................................................. 30
Information pages .............................................................................................................. 30
Embedded Web server ...................................................................................................... 30
Features ............................................................................................................ 31
4 Operational theory
Basic operation ................................................................................................................................... 34
Sequence of operation for the base unit ............................................................................ 34
Scanner functions and operation ........................................................................................................ 36
Scanner functions ............................................................................................................. 36
Scanner operation ............................................................................................................. 37
Internal components (base unit) ......................................................................................................... 38
Engine control system ........................................................................................................................ 39
Laser/scanner system ........................................................................................................................ 41
Pickup/feed/delivery system ............................................................................................................... 42
Image-formation system .................................................................................................................... 43
5 Removal and replacement
Removal and replacement strategy .................................................................................................... 48
Introduction ........................................................................................................................ 48
Removal and replacement warnings, cautions, notes, and tips ........................ 48
Electrostatic discharge ...................................................................................... 49
Required tools ................................................................................................... 49
Before performing service ................................................................................................. 49
After performing service ..................................................................................................... 50
Post-service tests .............................................................................................................. 51
Test 1 (print-quality test) ................................................................................... 51
Test 2 (copy-quality test) ................................................................................... 51
Parts removal order ........................................................................................................... 52
Scanner assembly .............................................................................................................................. 53
Link assemblies and scanner support-frame spring .......................................................... 53
Scanner lid ......................................................................................................................... 56
Control-panel overlay ......................................................................................................... 57
iv ENWW