3–31OPERATIONS AND TIMINGCOPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)C. Scanner Drive System1. OutlineThe scanner drive system is driven by the scannermotor (M2). The scanner motor changes the directionof its rotation, and its speed changes when movingthe scanner forward to suit the selected reproductionratio. However, its speed when moving the scannerin reverse remains constant (2.5 times as fast aswhen moving the scanner forward) regardless ofthe selected reproduction ratio.The distance traveled by the scanner variesdepending on the length of the copy paper and theselected reproduction ratio.Figure 3-205SCASCA*SCBSCB* DC controller PCBNo. 2 mirror mountNo. 1 mirror mountForwardLight-blocking plateScanner home position detection signal (SCHP)Scanner home position sensor (PS1)
