Konica Minolta bizhub c450 Service Manual page 23

10.3 Operation............................................................................................................ 27
10.3.1 PC Drum Drive mechanism ........................................................................ 27
10.3.2 PC Drum Phase control .............................................................................. 27
10.3.3 PC Drum small amount rotation control...................................................... 28
11. Charge Corona section ......................................................................................... 29
11.1 Operation............................................................................................................ 30
11.1.1 PC Drum Charge Corona ON/OFF control ................................................. 30
11.1.2 Cleaning/Main Erase mechanism ............................................................... 30
12. Developing section................................................................................................ 31
12.1 Composition ....................................................................................................... 31
12.2 Drive ................................................................................................................... 32
12.3 Operation............................................................................................................ 33
12.3.1 Developing Drive control............................................................................. 33
12.3.2 Developer flow ............................................................................................ 33
12.3.3 Developing bias .......................................................................................... 34
12.3.4 HMT (High grade Micro Toning) development ............................................ 34
12.3.5 Developer Scattering Preventive Mechanism ............................................. 35
12.3.6 TCR Sensor control .................................................................................... 37
13. Toner Supply section............................................................................................. 39
13.1 Composition ....................................................................................................... 39
13.2 Drive ................................................................................................................... 40
13.3 Operation............................................................................................................ 41
13.3.1 Toner Replenishing mechanism/control...................................................... 41
13.3.2 Toner Near-Empty and Toner Empty detection control ............................... 42
13.3.3 Shutter mechanism..................................................................................... 43
14. Transfer Corona section ........................................................................................ 44
14.1 Composition ....................................................................................................... 44
14.1.1 1st Image Transfer section.......................................................................... 44
14.1.2 2nd Image Transfer section......................................................................... 45
14.2 Drive ................................................................................................................... 46
14.2.1 1st Image Transfer section.......................................................................... 46
14.2.2 2nd Image Transfer section......................................................................... 47
14.3 Operation............................................................................................................ 47
14.3.1 Transfer Belt speed control ......................................................................... 47
14.3.2 1st Image Transfer Roller mechanism ........................................................ 48
14.3.3 2nd Image Transfer Roller pressure mechanism ........................................ 51
14.3.4 IDC Sensor Shutter mechanism ................................................................. 52
14.3.5 ATVC (Auto Transfer Voltage Control)......................................................... 53
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Theory of Operation Ver. 1.0 Mar. 2005