Canon iR3245 Series Service Manual page 187

Contents
6.1 Construction ...................................................................................................................................................................6-1
6.1.1 Specifications/Controls/Functions ............................................................................................................................................... 6-1
6.1.2 Main Configuration Parts............................................................................................................................................................. 6-1
6.1.3 Control System Configuration ..................................................................................................................................................... 6-2
6.2 Basic Sequence ..............................................................................................................................................................6-3
6.2.1 Basic Sequence ............................................................................................................................................................................ 6-3
6.3 Various Controls ............................................................................................................................................................6-4
6.3.1 Controlling the Laser Activation Timing..................................................................................................................................... 6-4
6.3.1.1 Laser ON/OFF Control ...................................................................................................................................................................................6-4
6.3.1.2 Main Scanning Synchronous Control .............................................................................................................................................................6-5
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 .......................................................................................................................................... 6-6
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.........................................................................................................................................6-8
6.4.1 Laser Scanner Unit....................................................................................................................................................................... 6-8
6.4.1.1 Before Removing the Laser Unit ....................................................................................................................................................................6-8
6.4.1.2 Removing the Laser Unit ................................................................................................................................................................................6-8
6.4.1.3 After Replacing the Laser Scanner Unit .........................................................................................................................................................6-8
Contents