Canon imageCLASS MF7460 Service Manual page 8

Contents
4.4.8.2 Removing the Reader Heater (Left)............................................................................................. 4- 21
Chapter 5 Laser Exposure
5.1 Overview/Configuration ................................................................................................................................. 5- 1
5.1.1 Overview ................................................................................................................................................... 5- 1
5.1.2 Specifications and Control Mechanism ................................................................................................ 5- 1
5.1.3 Main Components.................................................................................................................................... 5- 2
5.1.4 Control System Configuration................................................................................................................ 5- 3
5.2 Controlling the Laser Activation Timing....................................................................................................... 5- 4
5.2.1 Laser Emission ON/OFF Control .......................................................................................................... 5- 4
5.2.2 Horizontal Synchronization Control ...................................................................................................... 5- 4
5.3 Controlling the Intensity of Laser Light ........................................................................................................ 5- 5
5.3.1 Automatic Photocurrent Control (APC) ................................................................................................ 5- 5
5.4 Controlling the Laser Scanner Motor........................................................................................................... 5- 5
5.4.1 Laser Scanner Motor Control................................................................................................................. 5- 5
5.5 Controlling the Laser Shutter ........................................................................................................................ 5- 6
5.5.1 Laser Shutter Control .............................................................................................................................. 5- 6
5.6 Parts Replacement Procedure ..................................................................................................................... 5- 7
5.6.1 Laser/Scanner Unit .................................................................................................................................. 5- 7
5.6.1.1 Removing the Laser Scanner Unit ................................................................................................. 5- 7
Chapter 6 Image Formation
6.1 Overview/Configuration ................................................................................................................................. 6- 1
6.1.1 Specifications of Image Formation System ......................................................................................... 6- 1
6.1.2 Major Components of Image Formation System ................................................................................ 6- 1
6.2 Image Formation Process ............................................................................................................................. 6- 2
6.2.1 Image Formation Process ...................................................................................................................... 6- 2
6.3 Basic Sequence .............................................................................................................................................. 6- 2
6.3.1 Basic Sequence of Operation ................................................................................................................ 6- 2
6.4 Driving and Controlling the High-Voltage System ..................................................................................... 6- 4
6.4.1 Outline ....................................................................................................................................................... 6- 4
6.4.2 Primary Charging Bias Control .............................................................................................................. 6- 4
6.4.3 Developing Bias Control ......................................................................................................................... 6- 5
6.5 Secondary Transfer Mechanism .................................................................................................................. 6- 5
6.5.1 Outline ....................................................................................................................................................... 6- 5
6.5.2 Transfer Roller Bias Control................................................................................................................... 6- 6
6.5.3 Static Eliminator Bias Control ................................................................................................................ 6- 6
6.6 Parts Replacement Procedure ..................................................................................................................... 6- 7
6.6.1 Transfer Charging Roller......................................................................................................................... 6- 7
6.6.1.1 Removing the Transfer Charging Roller ....................................................................................... 6- 7
Chapter 7 Pickup and Feed System
7.1 Overview/Configuration ................................................................................................................................. 7- 1
7.1.1 Specifications/Configuration/Operation Methods ............................................................................... 7- 1
7.1.2 Locations of Main Units .......................................................................................................................... 7- 2
7.1.3 Roller Layout Drawing............................................................................................................................. 7- 2