Control panel
.......................................................................................................................................
83
Formatter
.............................................................................................................................................
85
Laser/scanner
......................................................................................................................................
86
Memory-tag-reader assembly
..............................................................................................................
87
Fuser
....................................................................................................................................................
89
Fan
......................................................................................................................................
89
Fuser
...................................................................................................................................
90
Interlock assembly
.............................................................................................................................
100
ECU
...................................................................................................................................................
101
Main motor
.........................................................................................................................................
108
Pickup and feed assemblies
..............................................................................................................
110
Transfer roller
....................................................................................................................
110
Registration assembly
......................................................................................................
111
Main gear assembly/tray 2 pickup solenoid
......................................................................................
115
Print-cartridge door
............................................................................................................................
119
7
Problem solving
Basic problem solving
........................................................................................................................
122
Status-light patterns
...........................................................................................................................
124
Primary status-light patterns
.............................................................................................
124
Fatal error secondary messages
......................................................................................
130
Accessory error secondary messages
.............................................................................
134
Media problem solving
.......................................................................................................................
135
Printed page is different than what appeared on screen
..................................................................
137
Garbled, incorrect, or incomplete text
...............................................................................
137
Missing graphics or text, or blank pages
..........................................................................
137
Page format is different than on another HP LaserJet printer
..........................................
138
Graphics quality
................................................................................................................
138
Improve print quality
..........................................................................................................................
139
Light print or faded
............................................................................................................
139
Toner specks
....................................................................................................................
139
Dropouts
...........................................................................................................................
139
Vertical lines
......................................................................................................................
140
Gray background
..............................................................................................................
140
Toner smear
......................................................................................................................
140
Loose toner
.......................................................................................................................
141
Vertical repetitive defects
..................................................................................................
141
Misformed characters
.......................................................................................................
141
Page skew
........................................................................................................................
142
Curl or wave
......................................................................................................................
142
Wrinkles or creases
..........................................................................................................
142
Toner scatter outline
.........................................................................................................
143
Repetitive image defects
..................................................................................................
143
Clear jams
..........................................................................................................................................
144
Print-cartridge area
...........................................................................................................
144
Input trays
.........................................................................................................................
146
Output bin
.........................................................................................................................
149
Straight-through output path
.............................................................................................
150
Diagnostic resources
.........................................................................................................................
152
Engine test
........................................................................................................................
152
ENWW
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