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