Konica Minolta magicolor 4690MF Service Manual page 32

Theory of operation Ver. 1.0 May 2008
14.3.5 1st transfer roller pressure/retraction position control ................................. 44
14.3.6 Transfer belt cleaning mechanism............................................................... 45
14.3.7 1st transfer belt cleaning control ................................................................. 46
14.3.8 1st transfer belt backward rotation control .................................................. 46
14.3.9 Toner collecting port shutter mechanism .................................................... 47
15. Transfer section (2nd transfer)............................................................................... 48
15.1 Composition........................................................................................................ 48
15.2 Drive ................................................................................................................... 49
15.3 Operation ............................................................................................................ 49
15.3.1 2nd transfer roller pressure mechanism...................................................... 49
15.3.2 2nd transfer voltage control......................................................................... 51
15.3.3 2nd transfer voltage setting control (ATVC: auto transfer voltage control) .. 51
15.3.4 2nd transfer roller cleaning control.............................................................. 52
16. Waste toner collecting section............................................................................... 53
16.1 Composition........................................................................................................ 53
16.2 Drive ................................................................................................................... 54
16.3 Operation ............................................................................................................ 55
16.3.1 Toner flow at the 1st transfer section .......................................................... 55
16.3.2 Toner flow at the 2nd transfer section ......................................................... 56
16.3.3 Toner collecting port shutter mechanism at the suction transport unit........ 57
16.3.4 Toner collecting port shutter mechanism of the waste toner bottle ............. 57
16.3.5 Waste toner box locking mechanism........................................................... 58
16.3.6 Waste toner box locked position detection mechanism .............................. 58
16.3.7 Waste toner box-in-position detection mechanism...................................... 59
16.3.8 Waste toner flow in the waste toner box ..................................................... 59
16.3.9 Waste toner near-full condition detection control ........................................ 60
16.3.10 Waste toner full condition detection control ................................................ 60
17. Media feed section (Tray 1) ................................................................................... 61
17.1 Composition........................................................................................................ 61
17.2 Drive ................................................................................................................... 62
17.3 Operation ............................................................................................................ 62
17.3.1 Media lift plate mechanism ......................................................................... 62
17.3.2 Media separation mechanism ..................................................................... 63
17.3.3 Media feed control....................................................................................... 63
17.3.4 Media empty condition detection control..................................................... 64
18. Media feed section (Tray 2) ................................................................................... 65
18.1 Composition........................................................................................................ 65
18.2 Drive ................................................................................................................... 66
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