Canon MF4690 Service Manual - Page 59
Controlling the Intensity of Laser Light
UPC - 013803076820
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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
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