4
Maintenance
Cleaning the printer and accessories
..................................................................................................
86
Cleaning spilled toner
...........................................................................................................
86
Vacuum specifications
.........................................................................................
86
Approximate replacement intervals for supply items
.............................................................................
87
ETB life under different circumstances
................................................................................
89
Locating supplies
...................................................................................................................................
91
Replacing supply items
..........................................................................................................................
92
Changing print cartridges
.....................................................................................................
92
Replacing the transfer unit
...................................................................................................
94
Replacing the transfer unit when it is not at end of life
........................................
96
Replacing the fuser
..............................................................................................................
97
Replacing the fuser when it is not at end of life
..................................................
99
Printer memory (HP Color LaserJet 4600 models)
.............................................................................
100
Installing memory and font DIMMs (HP Color LaserJet 4600 models)
.............................
100
Enabling memory (HP Color LaserJet 4600 models)
........................................
102
Enabling the language font DIMM (HP Color LaserJet 4600 models)
...............
103
Checking DIMM installation (HP Color LaserJet 4600 models)
........................
103
Printer memory (HP Color LaserJet 4610n and 4650 models)
...........................................................
104
Installing memory (HP Color LaserJet 4610n and 4650 models) and fonts (HP Color
LaserJet 4650 models)
.......................................................................................................
105
To install DDR memory DIMMs (HP Color LaserJet 4610n and 4650
models)
...............................................................................................................
105
To install a flash memory card (HP Color LaserJet 4610n and 4650
models)
...............................................................................................................
109
Enabling memory (HP Color LaserJet 4610n and 4650 models)
......................
113
To enable memory for Windows 98, ME, and NT (HP Color
LaserJet 4650 models)
......................................................................
113
To enable memory for Windows 2000 and XP (HP Color
LaserJet 4610n and 4650 models)
....................................................
113
Installing an HP Jetdirect print server card (HP Color LaserJet 4600 and 4650 models only)
...........
114
Installing an HP Jetdirect print server card (HP Color LaserJet 4610n model)
..................................
116
5
Theory of operation
Basic operation
....................................................................................................................................
118
Operation sequence
............................................................................................................
119
Engine-control system
.........................................................................................................................
120
DC controller circuit
.............................................................................................................
121
Motors, fans, and environment sensor
...............................................................................
122
Fuser power-supply circuit
..................................................................................................
124
Heater temperature control
.................................................................................................
126
High-voltage power supply
.................................................................................................
127
Low-voltage power supply
..................................................................................................
128
Formatter system
................................................................................................................
129
PowerSave
..........................................................................................................................
130
Input/output
.........................................................................................................................
131
Parallel interface
................................................................................................
131
Expanded I/O (HP Color LaserJet 4600 models)
..............................................
131
USB 1.1 connector (HP Color LaserJet 4610n and 4650 models)
....................
131
Flash (HP Color LaserJet 4600 models)
............................................................
131
vi
ENWW