CHAPTER 3 EXPOSURE SYSTEMCOPYRIGHT © 1999 CANON INC. CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 3-5III. SCANNER DRIVE SYSTEMA. OutlineThe scanner is driven by the scanner motor (M2). The direction of rotation of the scannermotor determines whether the scanner moves forward or backward. The forward speed of thescanner motor is continuously variable to produce the required reproduction ratio. The reversespeed is fixed regardless of the reproduction ratio (2.5 times the forward speed for DIRECT copy-ing).The distance that the scanner moves varies to suit the size of copy paper and the reproductionratio.The control panel displays ‘E202’ in response to an error in the scanner motor (M2) or thescanner home position sensor (Q3).Figure 3-301Mirror 1 mountMirror 2 mountForwardScanner home positonsensor (Q3)Signal generating plateCoupling gearScanner motor (M2)Solenoid "OFF"(rear)Scanner motordrive signal DC controllerPCBMotor drive circuitPower supply PCBLens solenoid drivecommand (LNSD)Scanner home position signal(SCHP)
