Step 4: Development ................................................................................ 28
Step 5: Primary transfer ............................................................................ 29
Step 6: Secondary transfer ........................................................................ 29
Step 7: Separation ................................................................................... 30
Step 8: Fusing ......................................................................................... 30
Step 9: ITB cleaning ................................................................................. 31
Step 10: Drum cleaning ............................................................................ 31
Print cartridge ......................................................................................................... 31
Developing-roller engagement and disengagement ..................................................... 33
Intermediate transfer belt (ITB) unit ............................................................................. 34
Primary-transfer-roller engagement and disengagement ................................. 35
ITB cleaning ............................................................................................ 37
Calibration ............................................................................................................. 37
Color-misregistration control ...................................................................... 38
Image-stabilization control ......................................................................... 39
Pickup, feed, and delivery system ............................................................................................. 40
Pickup-and-feed unit ................................................................................................ 44
Cassette pickup ........................................................................................ 44
Cassette-presence detection ........................................................ 45
Cassette lift operation and cassette paper-presence detection ......... 46
Cassette multiple-feed prevention ................................................. 47
Multipurpose tray pickup ........................................................................... 47
Paper feed .............................................................................................. 48
Skew-feed prevention ................................................................. 50
Paper detection ......................................................................... 50
Feed speed control .................................................................... 51
Fusing and delivery unit ........................................................................................... 52
Loop control ............................................................................................ 52
Pressure-roller pressurization control ........................................................... 54
Duplexing unit ........................................................................................................ 55
Duplexing reverse and feed control ............................................................ 55
Duplex print operation .............................................................................. 56
Jam detection ........................................................................................................................ 58
Optional paper feeders .......................................................................................................... 61
Motor control .......................................................................................................... 63
Paper-feeder pickup and feed operation .................................................................... 64
Paper-size detection and cassette-presence detection ................................................... 66
Paper-feeder cassette lift operation ............................................................................ 67
Paper feeder jam detection ....................................................................................... 68
Document feeder/scanner assembly ......................................................................................... 70
Scanner subsystem .................................................................................................. 70
vi ENWW
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