Konica Minolta magicolor 4690MF Service Manual page 33

18.3 Operation............................................................................................................ 66
18.3.1 Media lift plate mechanism ......................................................................... 66
18.3.2 Media separation mechanism..................................................................... 67
18.3.3 Media feed control ...................................................................................... 67
18.3.4 Media supply level detection control ........................................................... 68
18.3.5 Media empty condition detection control .................................................... 68
18.3.6 Tray open/close detection control ............................................................... 69
18.3.7 Media misfeed detection control ................................................................. 69
19. Conveyance section (IDC sensor)......................................................................... 70
19.1 Composition ....................................................................................................... 70
19.1.1 Drive ........................................................................................................... 71
19.2 Operation............................................................................................................ 71
19.2.1 Toner density detection control ................................................................... 71
19.2.2 IDC sensor calibration control..................................................................... 72
19.2.3 IDC sensor shutter mechanism .................................................................. 72
20. Conveyance section (Registration roller) .............................................................. 73
20.1 Composition ....................................................................................................... 73
20.2 Drive ................................................................................................................... 74
20.3 Operation............................................................................................................ 75
20.3.1 Conveyance speed control ......................................................................... 75
20.3.2 Registration roller control............................................................................ 75
20.3.3 Control of loop formed before registration roller ......................................... 76
20.3.4 Media neutralization.................................................................................... 76
20.3.5 OHP transparencies detection control ........................................................ 77
20.3.6 Media size error detection control............................................................... 78
20.3.7 Temperature/humidity sensor ..................................................................... 78
21. Fusing section....................................................................................................... 79
21.1 Composition ....................................................................................................... 79
21.2 Drive ................................................................................................................... 80
21.3 Operation............................................................................................................ 80
21.3.1 Fusing roller drive control ........................................................................... 80
21.3.2 Fusing temperature control......................................................................... 83
21.3.3 Warm-up control ......................................................................................... 83
21.3.4 Wait control ................................................................................................. 84
21.3.5 Print control................................................................................................. 84
21.3.6 PPM control ................................................................................................ 85
21.3.7 Protection against abnormally high temperature ........................................ 85
22. Duplex section ...................................................................................................... 86
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Theory of operation Ver. 1.0 May 2008