Step 1: primary charging ................................................................ 116
Step 2: laser-beam exposure ......................................................... 116
Development block .......................................................................................... 117
Step 3: developing .......................................................................... 117
Transfer block ................................................................................................. 118
Step 4: image transfer .................................................................... 118
Step 5: separation from the drum ................................................... 118
Fuser block ...................................................................................................... 119
Step 6: fusing .................................................................................. 119
Drum-cleaning block ....................................................................................... 119
Step 7: drum cleaning ..................................................................... 119
Print cartridge .................................................................................................. 119
Memory tag ..................................................................................................... 120
Pickup-and-feed-system .................................................................................................. 121
Cassette paper size and presence detection .................................................. 124
Upper and lower cassette pickup mechanism ................................................. 125
Multiple-feed prevention mechanism .............................................................. 127
Tray 1 (multipurpose tray) pickup mechanism ................................................ 128
Skew-correction mechanism (registration) ...................................................... 129
Fuser/delivery block ........................................................................................ 130
Loop control .................................................................................................... 130
Jam detection .................................................................................................. 131
Duplexing unit ................................................................................................................................... 133
Duplexing reverse/feed operation .................................................................................... 134
Duplexing feed operation ................................................................................................. 135
Duplexing horizontal registration function ........................................................................ 136
Duplexing unit jam detection ............................................................................................ 137
1 x 500-sheet and 3 x 500-sheet high-capacity input feeder ............................................................ 138
Pickup/feed operation ...................................................................................................... 140
HCI pickup mechanism .................................................................................................... 142
Lift-up operation ............................................................................................................... 143
Multiple-feed prevention mechanism ............................................................................... 145
HCI jam detection ............................................................................................................ 147
Scanner component ......................................................................................................................... 148
ADF .................................................................................................................................................. 150
Input tray .......................................................................................................................... 150
ADF simplex printing operation sequence ....................................................................... 150
ADF duplex printing operation sequence ......................................................................... 151
Multifeed operation .......................................................................................................... 152
End of a scan job operation ............................................................................................. 153
Paper pick and separation operation ............................................................................... 153
Deskew ............................................................................................................................ 154
Stapler/stacker component ............................................................................................................... 155
Overview .......................................................................................................................... 155
Basic operation ................................................................................................................ 156
Control system ................................................................................................................. 15 7
Feed/stack system ........................................................................................................... 160
Staple system .................................................................................................................. 175
5 Removal and replacement
vi ENWW
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