Canon iR C2880 Series Service Manual page 13

7.2 Driving and Controlling the High-Voltage System.....................................................................................7- 10
7.2.1 Overview................................................................................................................................................................ 7- 10
7.2.2 Generation of the Primary Charging Bias.............................................................................................................. 7- 11
7.2.3 Generation of the Developing Bias........................................................................................................................ 7- 11
7.2.4 Generation of the Primary Transfer Bias ............................................................................................................... 7- 12
7.2.5 Generation of the Secondary Transfer Bias .......................................................................................................... 7- 12
7.3 Image Stabilization Control.......................................................................................................................7- 12
7.3.1 Overview of Image Stabilization ............................................................................................................................ 7- 12
7.3.2 Timing of Image Stabilization Control.................................................................................................................... 7- 13
7.3.3 Drum Film Thickness Detection............................................................................................................................. 7- 13
7.3.4 ATR Control........................................................................................................................................................... 7- 14
7.3.5 D-max Control ....................................................................................................................................................... 7- 15
7.3.6 PASCAL Control.................................................................................................................................................... 7- 18
7.3.7 D-half Control ........................................................................................................................................................ 7- 19
7.3.8 ARCDAT Control ................................................................................................................................................... 7- 22
7.3.9 Color Displacement Correction Control ................................................................................................................. 7- 23
7.3.10 ATVC Control....................................................................................................................................................... 7- 26
7.4 Special Control .........................................................................................................................................7- 27
7.4.1 Black band sequence ............................................................................................................................................ 7- 27
7.4.2 OHP black band sequence.................................................................................................................................... 7- 28
7.4.3 Colour band sequence .......................................................................................................................................... 7- 28
7.5 Drum Unit .................................................................................................................................................7- 30
7.5.1 Drum Unit .............................................................................................................................................................. 7- 30
7.5.1.1 Overview ................................................................................................................................................................................ 7- 30
7.5.1.2 Detecting the Presence/Absence of the Drum Unit ............................................................................................................... 7- 31
7.5.1.3 Identifying a New/Old Drum Unit............................................................................................................................................ 7- 31
7.5.1.4 Opening/Closing the Toner Shutter ....................................................................................................................................... 7- 33
7.6 Toner Container........................................................................................................................................7- 34
7.6.1 Overview................................................................................................................................................................ 7- 34
7.6.2 Supplying Toner .................................................................................................................................................... 7- 34
7.6.3 Detecting the Level of Toner ................................................................................................................................. 7- 36
7.6.4 Toner Container Detection .................................................................................................................................... 7- 37
7.7 Transfer Unit .............................................................................................................................................7- 37
7.7.1 Outline of the Transfer Unit ................................................................................................................................... 7- 37
7.7.1.1 Overview ................................................................................................................................................................................ 7- 37
7.7.1.2 Primary Transfer Block .......................................................................................................................................................... 7- 38
7.7.1.3 ITB Soiling Removal Sequence Control................................................................................................................................. 7- 38
7.7.1.4 Secondary Transfer Block...................................................................................................................................................... 7- 39
7.8 Waste Toner Collection Mechanism .........................................................................................................7- 40
7.8.1 Collecting the Waste Toner ................................................................................................................................... 7- 40
7.8.2 Detecting the Level of Waste Toner ...................................................................................................................... 7- 40
7.8.3 Waste toner case detection ................................................................................................................................... 7- 42
7.9 Parts Replacement Procedure .................................................................................................................7- 43
7.9.1 Process Unit .......................................................................................................................................................... 7- 43
7.9.1.1 Removing the Process Unit ................................................................................................................................................... 7- 43
7.9.2 Drum Unit .............................................................................................................................................................. 7- 44
7.9.2.1 Removing the Drum Cartridge ............................................................................................................................................... 7- 44
7.9.3 Drum ITB Motor ..................................................................................................................................................... 7- 45
7.9.3.1 Before Removing the Drum ITB Moto.................................................................................................................................... 7- 45
7.9.3.2 Removing the Drum ITB Motor .............................................................................................................................................. 7- 45
7.9.4 Hopper Assembly .................................................................................................................................................. 7- 46
7.9.4.1 Before Removing the Hopper Supply Unit ............................................................................................................................. 7- 46
7.9.4.2 Removing the Hopper Supply Unit......................................................................................................................................... 7- 46
7.9.5 Developing Motor (Bk/Y/M/C)................................................................................................................................ 7- 46
7.9.5.1 Before Removing the Developing Motor ................................................................................................................................ 7- 46
7.9.5.2 Removing the Developing Motor............................................................................................................................................ 7- 46
7.9.6 Intermediate Transfer Unit..................................................................................................................................... 7- 47
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