Konica Minolta magicolor 8650 Service Manual page 31

18.2 Drive ................................................................................................................... 88
18.3 Operation............................................................................................................ 89
18.3.1 Fusing roller drive control ........................................................................... 89
18.3.2 Fusing loop control ..................................................................................... 90
18.3.3 Fusing pressure roller pressure/retraction mechanism............................... 91
18.3.4 Fusing temperature control......................................................................... 92
18.3.5 Fusing temperature control during a warm-up cycle (Outline).................... 93
18.3.6 Fusing temperature control during a warm-up cycle (in details) ................. 94
18.3.7 Fusing temperature control during a print job ............................................. 95
18.3.8 Temperature control during stand-by .......................................................... 95
18.3.9 Temperature control during low power mode.............................................. 95
18.3.10 Protection from abnormally high temperature............................................. 96
18.3.11 Detection of a new fusing unit..................................................................... 96
18.3.12 PPM control ................................................................................................ 96
18.3.13 Delay control ............................................................................................... 96
19. Paper exit/switchback section ............................................................................... 97
19.1 Composition ....................................................................................................... 97
19.2 Drive ................................................................................................................... 98
19.3 Operation............................................................................................................ 99
19.3.1 Paper exit/switchback control...................................................................... 99
20. Duplex section .................................................................................................... 102
20.1 Composition ..................................................................................................... 102
20.2 Drive ................................................................................................................. 103
20.2.1 Duplex section drive mechanism .............................................................. 103
20.3 Operation.......................................................................................................... 104
20.3.1 Duplex section transport control ............................................................... 104
20.4 Transport control............................................................................................... 105
20.4.1 Duplex unit transport motor control........................................................... 105
20.4.2 2-sided printing method ............................................................................ 105
21. Image stabilization control .................................................................................. 109
21.1 Overview .......................................................................................................... 109
21.2 Operation.......................................................................................................... 110
21.2.1 IDC registration sensor adjustment control............................................... 110
21.2.2 Max. density adjustment control ............................................................... 110
21.2.3 LD (laser diode) intensity adjustment control............................................ 110
21.2.4 Gamma correction control ........................................................................ 110
21.3 Operation sequence ......................................................................................... 111
21.4 Operation timing ............................................................................................... 112
22. Image processing................................................................................................ 115
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Theory of operation Ver. 2.0 Nov. 2007