Canon iR2422 series Service Manual page 151

Contents
6.1 Construction ...................................................................................................................................................................6-1
6.1.1 Specifications of Image Formation System ................................................................................................................................. 6-1
6.1.2 Major Components of Image Formation System......................................................................................................................... 6-2
6.2 Image Formation Process...............................................................................................................................................6-3
6.2.1 Image Formation Process............................................................................................................................................................. 6-3
6.3 Basic Sequence ..............................................................................................................................................................6-4
6.3.1 Basic Sequence of Operation ....................................................................................................................................................... 6-4
6.4 Driving and Controlling the High-Voltage System .......................................................................................................6-5
6.4.1 Outline.......................................................................................................................................................................................... 6-5
6.5 Drum Unit ......................................................................................................................................................................6-6
6.5.1 Outline of the Drum Unit ............................................................................................................................................................. 6-6
6.5.1.1 Outline.............................................................................................................................................................................................................6-6
6.5.2 Charging Mechanism ................................................................................................................................................................... 6-6
6.5.2.1 Primary Charging Bias Control.......................................................................................................................................................................6-6
6.6 Developing Unit.............................................................................................................................................................6-7
6.6.1 Outline.......................................................................................................................................................................................... 6-7
6.6.2 Developing Bias Control.............................................................................................................................................................. 6-7
6.7 Toner Container .............................................................................................................................................................6-8
6.7.1 Outline.......................................................................................................................................................................................... 6-8
6.8 Transfer Unit ..................................................................................................................................................................6-8
6.8.1 Outline of the Transfer Unit......................................................................................................................................................... 6-8
6.8.1.1 Outline.............................................................................................................................................................................................................6-8
6.8.2 Controlling the Transfer Bias....................................................................................................................................................... 6-9
6.8.2.1 Transfer Roller Bias Control ...........................................................................................................................................................................6-9
6.8.3 Separation Mechanism................................................................................................................................................................. 6-9
6.8.3.1 Static Eliminator Bias Control ........................................................................................................................................................................6-9
6.9 Photosensitive Drum Cleaning.....................................................................................................................................6-10
6.9.1 Outline........................................................................................................................................................................................ 6-10
6.9.2 Waste Toner Full Detection ....................................................................................................................................................... 6-10
6.10 Parts Replacement Procedure.....................................................................................................................................6-11
6.10.1 Drum Unit ................................................................................................................................................................................ 6-11
6.10.1.1 Removing the Drum Unit............................................................................................................................................................................6-11
6.10.2 Developing Assembly .............................................................................................................................................................. 6-11
6.10.2.1 Removing the Developing Assembly..........................................................................................................................................................6-11
6.10.2.2 Precautions about Installation of Developing Assembly ............................................................................................................................6-11
6.10.2.3 Procedure after Replacing the Developing Assembly ................................................................................................................................6-11
6.10.3 Transfer Charging Roller ......................................................................................................................................................... 6-12
6.10.3.1 Removing the Transfer Charging Roller.....................................................................................................................................................6-12
Contents