Image-formation process ................................................................................................... 82
Latent-image formation stage ............................................................................................ 83
Step 1: primary charging ................................................................................... 83
Step 2: laser-beam exposure ............................................................................ 84
Developing stage ............................................................................................................... 84
Step 3: development ......................................................................................... 84
Transfer stage .................................................................................................................... 85
Step 4: primary transfer ..................................................................................... 85
Step 5: secondary transfer ................................................................................ 85
Step 6: separation from the drum ...................................................................... 86
Fusing stage ...................................................................................................................... 86
Step 7: fusing .................................................................................................... 86
ITB cleaning stage ............................................................................................................. 87
Step 8: ITB cleaning .......................................................................................... 87
Drum cleaning stage .......................................................................................................... 88
Step 9: drum cleaning ....................................................................................... 88
Developing roller engagement/disengagement control ..................................... 88
Pickup-and-feed system ..................................................................................................................... 89
Jam detection .................................................................................................................... 90
Pad transfer ....................................................................................................................... 90
Multiple-feed prevention .................................................................................................... 90
Scanner system (base models) .......................................................................................................... 91
Scanner power-on sequence of events ............................................................................. 91
Copy or scan-to-computer sequence of events ................................................................. 92
Scanner and ADF functions and operation (fax/memory-card models) ............................................. 93
Scanner functions ............................................................................................................. 93
Scanner operation ............................................................................................................. 94
ADF operation .................................................................................................................... 94
ADF paper path and ADF sensors ..................................................................................... 95
ADF jam detection ............................................................................................................. 96
Memory card system (fax/memory-card models only) ....................................................................... 97
Fax functions and operation (fax/memory-card models only) ............................................................ 98
Computer and network security features ........................................................................... 98
PSTN operation ................................................................................................................. 98
Receive faxes when you hear fax tones ............................................................................ 98
Distinctive ring function ...................................................................................................... 99
Fax by using Voice over IP services .................................................................................. 99
The fax subsystem ........................................................................................................... 100
Fax card in the fax subsystem ......................................................................................... 100
Safety isolation ................................................................................................ 100
Safety-protection circuitry ................................................................................ 100
Data path ......................................................................................................... 101
Hook state ....................................................................................................... 101
Downstream device detection ......................................................................... 101
vi ENWW