Pickup/feed system
.............................................................................................................................
159
Pickup/feed unit
..................................................................................................................
161
Cassette detection and cassette paper-size detection
......................................
162
Overhead transparency detection
......................................................................
163
Small-size paper detection
.................................................................................
164
Feed-speed control
............................................................................................
165
Fuser/delivery unit
...............................................................................................................
166
Duplex feed unit
..................................................................................................................
167
500-sheet paper feeder
.......................................................................................................................
168
Pickup and feed operations
................................................................................................
169
2 x 500-sheet feeder
............................................................................................................................
170
Pickup and feed system
......................................................................................................
171
Cassette detection and cassette paper-size detection
......................................
172
6
Removal and replacement
Introduction
..........................................................................................................................................
174
Repair notices
.....................................................................................................................
174
Caution regarding electrostatic discharge (ESD)
...............................................................
174
Required tools
.....................................................................................................................
174
Types of fasteners
..............................................................................................................
175
Supplies
...............................................................................................................................................
176
Print cartridges and ETB
.....................................................................................................
177
Covers and external components
........................................................................................................
178
Rear cover
..........................................................................................................................
178
Top cover
............................................................................................................................
179
Rear top cover
....................................................................................................................
181
Left cover
............................................................................................................................
183
Right cover
..........................................................................................................................
184
Multipurpose tray (tray 1)
....................................................................................................
185
Front cover
..........................................................................................................................
186
Control panel
.......................................................................................................................
187
Installing a new overlay (HP Color LaserJet 4600 models)
...............................................
189
Installing a new control-panel label (HP Color LaserJet 4650 models)
.............................
190
Internal components
............................................................................................................................
191
DC controller shield
.............................................................................................................
191
Internal components (front)
.................................................................................................
192
Paper pickup unit
...............................................................................................
192
Paper pickup sensor PCA
..................................................................................
194
Cassette (tray 2) paper pickup rollers
...............................................................
195
Paper pickup drive unit
.......................................................................................
196
Multipurpose tray pickup roller and separation pad
...........................................
197
Solenoids
............................................................................................................
199
Color registration detection unit
.........................................................................
200
Internal components (left side)
...........................................................................................
202
Environment sensor (HP Color LaserJet 4610n/4650 models only)
.................
202
Drum drive units
.................................................................................................
203
Memory-tag antenna PCAs
................................................................................
209
Developing disengaging motor assembly
..........................................................
210
DC controller PCA
..............................................................................................
211
Memory controller PCA
......................................................................................
212
viii
ENWW