6
Removal and replacement
This chapter includes information about removing and replacing printer parts and
components.
Introduction ............................................................................................................................185
Removal and replacement strategy ................................................................................185
Repair notices .................................................................................................................185
Caution regarding electrostatic discharge (ESD) ...........................................................185
Required tools .................................................................................................................185
Types of screws ..............................................................................................................186
Supplies .................................................................................................................................188
Print cartridges and ETB ................................................................................................189
Covers and external components .........................................................................................190
Rear cover ......................................................................................................................190
Top cover ........................................................................................................................190
Rear top cover ................................................................................................................191
Left cover ........................................................................................................................192
Right cover ......................................................................................................................193
Reinstallation tip .............................................................................................................194
Multi-purpose tray (Tray 1) .............................................................................................194
Front cover ......................................................................................................................195
Control panel ..................................................................................................................196
Cassette cover ................................................................................................................198
Internal components (front) ...................................................................................................199
Paper pickup unit ............................................................................................................199
Cassette sensor PCB .....................................................................................................200
Multi-purpose tray sensor PCB ......................................................................................200
Paper pickup drive unit .................................................................................................201
Lifter drive unit ..............................................................................................................202
Cassette (Tray 2) paper pickup and feed rollers ............................................................204
Solenoid and clutch ........................................................................................................205
Cassette separation roller .............................................................................................206
Multi-purpose tray pickup roller ......................................................................................207
Multi-purpose tray separation pad .................................................................................208
Color registration detection unit ......................................................................................208
Internal components (left side) ..............................................................................................210
DC controller shield ........................................................................................................210
Environment sensor (HP Color LaserJet 5550 models) .................................................210
Memory tag antenna PCBs ............................................................................................211
E-label memory controller PCB ......................................................................................217
DC controller PCB ..........................................................................................................218
Cassette paper size detection switches .........................................................................219
Power supply fan ............................................................................................................220
Internal components (rear) ....................................................................................................222
Formatter ........................................................................................................................222
Low-voltage power supply ..............................................................................................223
Formatter case ................................................................................................................225
Laser/scanner units ........................................................................................................227
ENWW 183
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