Required tools
....................................................................................................................
38
Before performing service
..................................................................................................................
39
Pre-service procedures
......................................................................................................
39
Parts removal order
...........................................................................................................
39
Covers
................................................................................................................................................
40
Front Cover
........................................................................................................................
40
Control panel
.....................................................................................................................
40
Side Covers
.......................................................................................................................
41
Back Cover
........................................................................................................................
43
Top Cover
..........................................................................................................................
44
Formatter
............................................................................................................................................
46
Fuser
..................................................................................................................................................
47
Laser/scanner
.....................................................................................................................................
51
DC controller
......................................................................................................................................
54
Transfer roller
.....................................................................................................................................
56
Motor drive belt
...................................................................................................................................
57
Rear paper-feed roller
........................................................................................................................
59
Main motor
.........................................................................................................................................
61
5
Problem solving
Problem-solving checklist
...................................................................................................................
68
Step 1: Is the device set up correctly?
...............................................................................
68
Step 2: Is the Ready light on?
............................................................................................
68
Step 3: Can you print an engine test page?
......................................................................
68
Step 4: Is the device communicating with the computer?
..................................................
69
Step 5: Does the printed page look like you expected?
.....................................................
69
Contact HP support
............................................................................................................................
70
Status-light patterns
...........................................................................................................................
71
Clearing jams
.....................................................................................................................................
73
Typical media jam locations
...............................................................................................
73
Removing a jammed page
.................................................................................................
73
Improve print quality
...........................................................................................................................
76
Light print or faded
.............................................................................................................
76
Toner specks
.....................................................................................................................
76
Dropouts
............................................................................................................................
76
Vertical lines
......................................................................................................................
77
Gray background
...............................................................................................................
77
Toner smear
......................................................................................................................
77
Loose toner
........................................................................................................................
78
Vertical repetitive defects
...................................................................................................
78
Misformed characters
........................................................................................................
78
Page skew
.........................................................................................................................
78
Curl or wave
.......................................................................................................................
79
Wrinkles or creases
...........................................................................................................
79
Toner-scatter outline
..........................................................................................................
79
Media problem-solving
.......................................................................................................................
80
Printed page is different from what appeared on screen
....................................................................
81
Garbled, incorrect, or incomplete text
................................................................................
81
Missing graphics or text, or blank pages
...........................................................................
81
Page format is different than on another HP LaserJet printer
...........................................
81
iv
ENWW