Electrostatic discharge
.....................................................................................................
100
Required tools
..................................................................................................................
101
Before performing service
................................................................................................
101
After performing service
...................................................................................................
101
Post-service tests
............................................................................................................
101
Test 1 (print-quality test)
.................................................................................
101
Test 2 (copy-quality test)
.................................................................................
102
Test 3 (fax-quality test)
....................................................................................
102
Parts removal order
.........................................................................................................
103
HP LaserJet 3050 all-in-one
.............................................................................................................
106
Link assemblies and scanner support-frame springs
......................................................
107
Scanner side covers
........................................................................................................
109
Separation-pad set
..........................................................................................................
111
Control-panel bezel
..........................................................................................................
112
Control-panel assembly
...................................................................................................
114
Media lever and media-lever torsion spring
.....................................................................
115
Separation-pad assembly
................................................................................................
116
Scanner assembly
...........................................................................................................
118
Scanner assembly top cover
...........................................................................................
126
Top-cover assembly
........................................................................................................
129
Pickup roller
.....................................................................................................................
130
White platen
.....................................................................................................................
131
HP LaserJet 3052/3055 all-in-one
....................................................................................................
132
ADF input tray
..................................................................................................................
132
Flatbed lid
........................................................................................................................
133
Link assemblies and scanner support-frame springs
......................................................
136
Control-panel bezel
..........................................................................................................
138
Control-panel assembly
...................................................................................................
139
ADF separation pad
.........................................................................................................
141
ADF input-tray flag
...........................................................................................................
142
ADF pickup roller and load-arm assembly (HP LaserJet 3052/3055 all-in-one)
..............
143
ADF scanner glass
..........................................................................................................
146
Scanner assembly
...........................................................................................................
148
Printer (product base)
.......................................................................................................................
156
Printer separation pad
.....................................................................................................
157
Print cartridge
..................................................................................................................
158
Printer pickup roller
..........................................................................................................
159
Installing the scanner cushions
........................................................................................
162
Media input tray
...............................................................................................................
163
Transfer roller
..................................................................................................................
165
Side covers
......................................................................................................................
167
Print-cartridge door
..........................................................................................................
169
Rear cover and fuser cover
.............................................................................................
170
Front cover
.......................................................................................................................
172
Speaker assembly
...........................................................................................................
174
Power supply
...................................................................................................................
175
Formatter and line interface unit (LIU)
.............................................................................
178
Scanner support-frame
....................................................................................................
182
Engine controller unit (ECU)
............................................................................................
185
Laser/scanner assembly
..................................................................................................
189
ENWW
vii