Canon iR3570 Service Manual page 221

Contents
6.1 Construction ...................................................................................................................................................................6-1
6.1.1 Specifications, Control Mechanism, and Functions .................................................................................................................... 6-1
6.1.2 Major Components....................................................................................................................................................................... 6-1
6.1.3 Construction of the Control System............................................................................................................................................. 6-1
6.2 Basic Sequence ..............................................................................................................................................................6-3
6.2.1 Basic Sequence ........................................................................................................................................................................... 6-3
6.3 Various Controls ............................................................................................................................................................6-3
6.3.1 Controlling the Laser Activation Timing..................................................................................................................................... 6-3
6.3.1.1 Turning On and off the Laser Light ................................................................................................................................................................6-3
6.3.1.2 Main Scanning Synchronous Control .............................................................................................................................................................6-4
6.3.2 Controlling the Intensity of Laser Light ...................................................................................................................................... 6-5
6.3.2.1 APC Control....................................................................................................................................................................................................6-5
6.3.3 Controlling the Laser Scanner Motor .......................................................................................................................................... 6-5
6.3.3.1 Controlling the Laser Scanner Motor..............................................................................................................................................................6-5
6.3.4 Controlling the Laser Shutter....................................................................................................................................................... 6-5
6.3.4.1 Controlling the Laser Shutter ..........................................................................................................................................................................6-5
6.4 Parts Replacement Procedure.........................................................................................................................................6-6
6.4.1 Laser Scanner Unit....................................................................................................................................................................... 6-6
6.4.1.1 Removing the Front Cover Unit......................................................................................................................................................................6-6
6.4.1.2 Removing the Left Cover................................................................................................................................................................................6-6
6.4.1.3 Removing the Laser Unit ................................................................................................................................................................................6-6
Contents