Canon imagePRESS C1 P Service Manual page 14

Chapter 6 Laser Exposure
6.1 Construction ...................................................................................................................................................................6-1
6.1.1 Specifications/Control Mechanisms/Functions ........................................................................................................................... 6-1
6.1.2 Major Components....................................................................................................................................................................... 6-1
6.1.3 Control System Configuration ..................................................................................................................................................... 6-2
6.2 Basic Sequence ..............................................................................................................................................................6-2
6.2.1 Basic Sequence ............................................................................................................................................................................ 6-2
6.3 Various Control..............................................................................................................................................................6-3
6.3.1 Controlling the Laser Activation Timing..................................................................................................................................... 6-3
6.3.1.1 ON/OFF Control .............................................................................................................................................................................................6-3
6.3.1.2 Main Scan Sync Control .................................................................................................................................................................................6-4
6.3.1.3 Sub Scan Sync Control....................................................................................................................................................................................6-5
6.3.2 Controlling the Intensity of Laser Light ...................................................................................................................................... 6-6
6.3.2.1 APC Control ...................................................................................................................................................................................................6-6
6.3.2.2 PWM Control .................................................................................................................................................................................................6-6
6.3.3 Controlling the Laser Scanner Motor .......................................................................................................................................... 6-6
6.3.3.1 Laser Scanner Motor Control .........................................................................................................................................................................6-6
6.3.4 Controlling the Laser Shutter....................................................................................................................................................... 6-7
6.3.4.1 Laser Shutter Control .....................................................................................................................................................................................6-7
6.4 Parts Replacement Procedure.........................................................................................................................................6-9
6.4.1 Laser Scanner Unit....................................................................................................................................................................... 6-9
6.4.1.1 Preparation for Removing the Laser Scanner Unit .........................................................................................................................................6-9
6.4.1.2 Removing the Laser Scanner Unit ..................................................................................................................................................................6-9
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