Changing The Reproduction Ratio - Canon 1000 Service Manual

D. Changing the Reproduction Ratio
The reproduction ratio in the main scanning direction (drum axis) is changed by skipping the image
signals when writing them to line memory (reduction) or repeating them when reading from line memory
(enlargement).
The reproduction ratio in the sub scanning direction is changed by moving the mirror mount fast
(reduction) or slowly (enlargement).
Scanner motor drive signal
Scanner home position
detection signal (SCHP)
Scanner motor driver PCB
COPYRIGHT © 2001 CANON INC.
Scanner motor (M29)
No. 2 mirror mount
Scanner home position sensor (PS37)
Figure 3-206
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Forward
No. 1 mirror mount
Signal plate
Reader controller PCB
3. OPERATION AND TIMING
3-33