COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)III. LASER SCANNER MOTORA. Controlling the Laser Scanner MotorFigure 3-301The machine’s laser scanner motor is a 3-phase, 8-pole DC brushless motor.The laser scanner motor driver circuit is in the GA (IC204), and is equipped with twocontrol circuits, controlling speed and discrepancies in phase to ultimately control therotation of the laser scanner motor.CHAPTER 3 LASER EXPOSURE SYSTEM3-9DC controller PCBGA(IC204)Scanner motor54MBDD-CPU(IC201)PRNT* SCNONVDWN*VUP*PLUP*PLDWN*273329283031J211-2 J211-5J901-3J2-2J211-7J901-157SCNDSCMFGBD*202C286SpeedcontrolvoltagegenerationcircuitLockdetectioncircuitMotordrivevoltagegenerationcircuitBD PCDownload free service manual at http://printer1.blogspot.com
