Hard-disk accessory (HP Color LaserJet 4600 and 4650 models)
...................
131
CPU
....................................................................................................................
131
Printer memory
...................................................................................................................
132
Read-only memory
.............................................................................................
132
Random-access memory
...................................................................................
132
DIMM slots (HP Color LaserJet 4600 Series printer)
.........................................................
132
Firmware DIMM (HP Color LaserJet 4600 models)
..........................................
132
Flash memory (HP Color LaserJet 4610n and 4650 models)
...........................
132
Nonvolatile memory
...........................................................................................
132
PJL overview
.......................................................................................................................
133
PML
.....................................................................................................................................
133
Control panel
.......................................................................................................................
133
Laser/scanner assembly
......................................................................................................................
134
Scanner-motor control
........................................................................................................
135
Image-formation system
......................................................................................................................
136
Image-formation process
....................................................................................................
137
Print cartridges
....................................................................................................................
138
Memory tag
........................................................................................................
139
Toner-level detection
..........................................................................................................
139
Developer rotations
............................................................................................
140
Toner sensor
......................................................................................................
140
Photosensitive drum rotations
............................................................................
140
Developing cylinder disengaging control
...........................................................
141
Electrostatic transfer/transport belt (ETB) unit
....................................................................
142
Electrostatic-latent-image-formation block
.........................................................................
143
Step 1: Primary exposure
...................................................................................
143
Step 2: Primary charging
....................................................................................
144
Step 3: Laser beam exposure
............................................................................
144
Development block
.............................................................................................................
145
Step 4: Toner charging
.......................................................................................
145
Step 5: Development
..........................................................................................
145
Transfer block
.....................................................................................................................
146
Step 6: Attaching
................................................................................................
146
Step 7: Transfer
.................................................................................................
146
Step 8: Separation
.............................................................................................
148
Fusing block
........................................................................................................................
148
Step 9: Fusing
....................................................................................................
148
Cleaning block
....................................................................................................................
149
Step 10: ETB cleaning
.......................................................................................
149
Step 11: Photosensitive drum cleaning
.............................................................
149
Calibration and cleaning
.....................................................................................................
150
ETB cleaning
......................................................................................................
152
Photosensitive drum cleaning
............................................................................
153
Color-plane registration calibration
.....................................................................................
154
Drum phase calibration
.......................................................................................................
155
Image stabilization control
..................................................................................................
155
Environmental change control (HP Color LaserJet 4610n and 4650 models). .156
Image density calibration control (DMAX)
.........................................................
156
Image halftone calibration control (DHALF)
.......................................................
157
Image density detection
.....................................................................................
158
ENWW
vii