Canon ImageCLASS MF4690 Service Manual - page 59

Contents

Contents

5.1 Overview/Configuration ................................................................................................................................................5-1

5.1.1 Overview...................................................................................................................................................................................... 5-1

5.2 Controlling the Laser Activation Timing.......................................................................................................................5-2

5.2.1 Laser ON / OFF Control .............................................................................................................................................................. 5-2

5.3 Controlling the Intensity of Laser Light ........................................................................................................................5-2

5.3.1 Auto Photoelectric Current Control (APC).................................................................................................................................. 5-2

5.4 Controlling the Laser Scanner Motor.............................................................................................................................5-3

5.4.1 Overview...................................................................................................................................................................................... 5-3

5.4.2 Scanner Motor Speed Control...................................................................................................................................................... 5-3

5.4.3 Detection of Fault of the Scanner Motor ..................................................................................................................................... 5-3

5.5 Parts Replacement Procedure.........................................................................................................................................5-4

5.5.1 Laser/Scanner Unit....................................................................................................................................................................... 5-4

5.5.1.1 Preparation for Removing the Laser Scanner Unit .........................................................................................................................................5-4

5.5.1.2 Removing the Laser Scanner Unit ..................................................................................................................................................................5-4