ContentsContents5.1 Construction ...................................................................................................................................................................5-15.1.1 Overview...................................................................................................................................................................................... 5-15.1.2 Specifications and Control Mechanism ....................................................................................................................................... 5-15.1.3 Main Components ........................................................................................................................................................................ 5-15.1.4 Control System Configuration ..................................................................................................................................................... 5-25.2 Various Controls ............................................................................................................................................................5-25.2.1 Controlling the Laser Activation Timing..................................................................................................................................... 5-25.2.1.1 Laser Emission ON/OFF Control....................................................................................................................................................................5-25.2.1.2 Horizontal Synchronization Control ...............................................................................................................................................................5-35.2.2 Controlling the Intensity of Laser Light ...................................................................................................................................... 5-35.2.2.1 Automatic Photocurrent Control (APC)..........................................................................................................................................................5-35.2.3 Controlling the Laser Scanner Motor .......................................................................................................................................... 5-35.2.3.1 Laser Scanner Motor Control..........................................................................................................................................................................5-35.2.4 Controlling the Laser Shutter....................................................................................................................................................... 5-45.2.4.1 Laser Shutter Control ......................................................................................................................................................................................5-45.3 Parts Replacement Procedure.........................................................................................................................................5-65.3.1 Laser Scanner Unit....................................................................................................................................................................... 5-65.3.1.1 Removing the Laser Scanner Unit ..................................................................................................................................................................5-6