Parts Replacement Procedure - Canon iR C3200 Series Service Manual

Contents
8.1 Construction ...................................................................................................................................................... 8-1
8.1.1 Specifications, Control Mechanisms, and Functions ................................................................................. 8-1
8.1.2 Major Components ..................................................................................................................................... 8-2
8.1.3 Construction of the Control System ........................................................................................................... 8-3
8.2 Basic Sequence .................................................................................................................................................. 8-4
8.2.1 Basic Sequence of Operations .................................................................................................................... 8-4
8.3 Various Control ................................................................................................................................................. 8-5
8.3.1 Controlling the Laser Activation Timing .................................................................................................... 8-5
8.3.1.1 Turning On/Off the Laser .................................................................................................................... 8-5
8.3.1.2 BD Signal ............................................................................................................................................ 8-7
8.3.1.3 Controlling Synchronization in Main Scanning Direction .................................................................. 8-8
8.3.1.4 Controlling Synchronization in Sub Scanning Direction .................................................................... 8-8
8.3.2 Controlling the Intensity of Laser Light ..................................................................................................... 8-9
8.3.2.1 APC Control ........................................................................................................................................ 8-9
8.3.2.2 PWM Control ...................................................................................................................................... 8-9
8.3.3 Controlling the Laser Scanner Motor ....................................................................................................... 8-10
8.3.3.1 Controlling the Laser Scanner Motor ................................................................................................ 8-10
8.3.4 Controlling the Laser Shutter .................................................................................................................... 8-10
8.3.4.1 Controlling the Laser Shutter ............................................................................................................ 8-10
8.3.5 Correcting Image Displacement ................................................................................................................ 8-11
8.3.5.1 Outline ............................................................................................................................................... 8-11
8.3.5.2 Timing of Color Displacement Detection/Correction ....................................................................... 8-12
8.3.5.3 Detecting/Correcting Color Displacement in Sub Scanning Direction ............................................. 8-13
8.3.5.4 Detecting/Correcting the Angle in Main Scanning Direction ........................................................... 8-14
8.3.5.5 Detecting/Correcting Color Displacement in Main Scanning Direction ........................................... 8-16
8.3.5.6 Detecting/Correcting Changes in the Reproduction Ratio in Main Scanning Direction ................... 8-17

8.4 Parts Replacement Procedure .......................................................................................................................... 8-19

8.4.1 Laser Unit .................................................................................................................................................. 8-19
8.4.1.1 Removing the Center Delivery Tray ................................................................................................. 8-19
8.4.1.2 Removing the Laser Unit ................................................................................................................... 8-19
8.4.1.3 After Replacing the Laser Unit .......................................................................................................... 8-20
Contents