Sequence of operation
.....................................................................................................
114
Formatter system
.............................................................................................................................
116
Sleep mode
......................................................................................................................
116
Resolution
.......................................................................................................................
117
Input/output
......................................................................................................................
117
CPU
.................................................................................................................................
117
Memory
............................................................................................................................
117
Hard disk
.........................................................................................................
117
Random-access memory
................................................................................
117
DIMM slot
........................................................................................................
118
Firmware
.........................................................................................................
118
Nonvolatile memory
........................................................................................
118
PJL overview
...................................................................................................................
118
PML
.................................................................................................................................
118
Control panel
...................................................................................................................
118
Engine-control system
......................................................................................................................
119
DC controller
....................................................................................................................
120
Solenoids
........................................................................................................
120
Switches
..........................................................................................................
121
Sensors
...........................................................................................................
122
Motors and fans
..............................................................................................
123
Fuser control
....................................................................................................................
125
Fuser temperature-control circuit
....................................................................
127
Fuser over-temperature protection
..................................................................
128
Fuser-failure detection
....................................................................................
129
Fuser identification
..........................................................................................
129
Fuser-life detection
..........................................................................................
130
Relay-failure detection
.....................................................................................................
130
Low-voltage power supply
...............................................................................................
130
Overcurrent/overvoltage protection
.................................................................
131
Safety
..............................................................................................................
131
Voltage detection
............................................................................................
131
Sleep (powersave) mode
................................................................................
131
High-voltage power supply
..............................................................................................
131
Laser/scanner system
......................................................................................................................
134
Image-formation system
...................................................................................................................
136
Image-formation process
.................................................................................................
137
Step 1: Pre-exposure
......................................................................................
138
Step 2: Primary charging
.................................................................................
138
Step 3: Laser-beam exposure
.........................................................................
139
Step 4: Development
.......................................................................................
139
Step 5: Primary transfer
..................................................................................
140
Step 6: Secondary transfer
.............................................................................
140
Step 7: Separation
..........................................................................................
141
vi
ENWW