Olivetti d-Color 201MF Theory Of Operation page 5

10.3.1 PC drum drive mechanism ......................................................................... 35
10.3.2 PC drum phase control ............................................................................... 37
10.3.3 PC drum small amount rotation control ...................................................... 38
11. Charge corona section.......................................................................................... 39
11.1 Operation............................................................................................................ 40
11.1.1 PC drum charge corona ON/OFF control ................................................... 40
11.1.2 Cleaning/main erase mechanism ............................................................... 40
12. Developing section................................................................................................ 41
12.1 Composition ....................................................................................................... 41
12.2 Drive ................................................................................................................... 42
12.3 Transfer belt pressure retraction clutch .............................................................. 46
12.3.1 Developing drive control ............................................................................. 46
12.3.2 Developer flow ............................................................................................ 47
12.3.3 Developing bias .......................................................................................... 48
12.3.4 TCR sensor control..................................................................................... 49
13. Toner supply section ............................................................................................. 50
13.1 Composition ....................................................................................................... 50
13.2 Drive ................................................................................................................... 51
13.3 Operation............................................................................................................ 52
13.3.1 Toner replenishing mechanism/control ....................................................... 52
13.3.2 Toner cartridge detection ............................................................................ 53
13.3.3 Toner remainder amount detection ............................................................. 54
13.3.4 Shutter mechanism..................................................................................... 55
14. Transfer corona section......................................................................................... 56
14.1 Composition ....................................................................................................... 56
14.1.1 1st image transfer section........................................................................... 56
14.1.2 2nd image transfer section.......................................................................... 57
14.2 Transfer belt pressure retraction clutch .............................................................. 58
14.2.1 1st image transfer section........................................................................... 58
14.2.2 2nd image transfer section.......................................................................... 59
14.3 Operation............................................................................................................ 60
14.3.1 Transfer belt drive mechanism .................................................................... 60
14.3.2 1st image transfer roller mechanism........................................................... 60
14.3.3 2nd image transfer roller pressure mechanism........................................... 63
14.3.4 IDC sensor shutter mechanism .................................................................. 64
14.3.5 ATVC (Auto transfer voltage control)........................................................... 65
14.3.6 Transfer belt cleaning.................................................................................. 66
14.3.7 Reversing control of the transfer belt .......................................................... 66
ii
Theory of operation Ver. 1.0 Sep. 2008