
B. Varying the Reproduction Ratio
The reproduction ratio in the main scanning direction (drum axis) is changed by skipping (reduction)
image signals when writing into line memory or reading a multiple number of times (enlargement) when
reading from the line memory.
The reproduction ratio in the sub scanning direction, on the other hand, is changed by moving the mir-
ror mount faster (reduction) or slower (enlargement).
C. Sequence of Operations (original exposure system)
Figure 3-203
Scanner motor (M2)
Scanner home position
sensor (PS1)
Scanning lamp (FL1)
INTR
SCFW
SCFW
SCFW
LSTR
STBY
STBY
SCRV
SCRV
SCRV
SLEEP
Forward Reverse
Copy Start key ON
control panel
power switch ON
COPYRIGHT © 1996 CANON INC. CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
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3. OPERATIONS AND TIMING