Canon iR C3200 Series Service Manual page 14

Contents
9.5.1 Outline of the Drum Unit .......................................................................................................................... 9-24
9.5.1.1 Outline of the Drum Unit ................................................................................................................... 9-24
9.5.1.2 Controlling the Drive of the Drum Unit (D-UNIT) ........................................................................... 9-25
9.5.2 Developing Assembly ............................................................................................................................... 9-26
9.5.2.1 Construction of the Developing Assembly ........................................................................................ 9-26
9.5.2.2 Controlling the Developing Bias ....................................................................................................... 9-27
9.5.3 Auxiliary Brush ......................................................................................................................................... 9-29
9.5.3.1 Construction of the Auxiliary Brush .................................................................................................. 9-29
9.5.3.2 Controlling the Auxiliary Bias ........................................................................................................... 9-30
9.5.4 Charging Mechanism ................................................................................................................................ 9-34
9.5.4.1 Construction of the Charging Mechanism ......................................................................................... 9-34
9.5.4.2 Controlling the Charging Bias ........................................................................................................... 9-35
9.6 Toner Container ............................................................................................................................................... 9-37
9.6.1 Outline of the Toner Container ................................................................................................................. 9-37
9.6.2 Controlling the Toner Container Drive ..................................................................................................... 9-37
9.6.3 Checking the Level of Toner .................................................................................................................... 9-38
9.6.4 Controlling the Supply of Toner ............................................................................................................... 9-39
9.7 Transfer Unit .................................................................................................................................................... 9-40
9.7.1 Outline of the Transfer Unit ...................................................................................................................... 9-40
9.7.1.1 Outline of the Transfer Unit ............................................................................................................... 9-40
9.7.1.2 Controlling the Drive of the Transfer Unit ........................................................................................ 9-40
9.7.2 Controlling the Transfer Bias .................................................................................................................... 9-42
9.7.2.1 Controlling the Transfer Bias ............................................................................................................ 9-42
9.7.3 Cleaning .................................................................................................................................................... 9-44
9.7.3.1 Intermediate Transfer Belt (ITB) ....................................................................................................... 9-44
9.7.3.2 Secondary External Roller ................................................................................................................. 9-45
9.7.3.3 Collecting Waste Toner ..................................................................................................................... 9-45
9.7.4 Separation Mechanism .............................................................................................................................. 9-46
9.7.4.1 Separation .......................................................................................................................................... 9-46
9.8 Parts Replacement Procedure .......................................................................................................................... 9-48
9.8.1 Drum ITB Motor ....................................................................................................................................... 9-48
9.8.1.1 Slide Out the Drum Unit .................................................................................................................... 9-48
9.8.1.2 Removing the Upper Rear Cover ....................................................................................................... 9-48
9.8.1.3 Removing the Lower Rear Cover ...................................................................................................... 9-48
9.8.1.4 Removing the Controller Box Cover ................................................................................................. 9-48
9.8.1.5 Removing the DC Controller PCB Cover .......................................................................................... 9-48
9.8.1.6 Removing the Left Upper Rear Cover ............................................................................................... 9-48
9.8.1.7 Opening the Main Controller Box ..................................................................................................... 9-49
9.8.1.8 Removing the DC Controller Mounting ............................................................................................ 9-50
9.8.1.9 Removing the Fixing Heat Discharge Fan ......................................................................................... 9-50
9.8.1.10 Removing the Machine Heat Discharge Fan ................................................................................... 9-50
9.8.1.11 Removing the Developing Drive Unit ............................................................................................. 9-51
9.8.1.12 Removing the Lattice Connector Mounting .................................................................................... 9-51
9.8.1.13 Removing the High-Voltage Unit .................................................................................................... 9-52
9.8.1.14 Removing the Manual Feed Cooling Fan Duct ............................................................................... 9-52
9.8.1.15 Removing the Drum ITB Motor Mounting ..................................................................................... 9-52
9.8.1.16 Removing the Drum ITB Motor ...................................................................................................... 9-53
9.8.2 Drum Drive Unit ....................................................................................................................................... 9-53
9.8.2.1 Slide Out the Drum Unit .................................................................................................................... 9-53
9.8.2.2 Removing the Upper Rear Cover ....................................................................................................... 9-53
9.8.2.3 Removing the Lower Rear Cover ...................................................................................................... 9-53
9.8.2.4 Removing the Controller Box Cover ................................................................................................. 9-53
9.8.2.5 Removing the DC Controller PCB Cover .......................................................................................... 9-54
9.8.2.6 Removing the Left Upper Rear Cover ............................................................................................... 9-54