Canon PC300 Service Manual page 41

OPERATIONS AND TIMIN
a. Stopping the Copyboard
Causing the copyboard drive solenoid
(SL2) to go OFF frees both forward and
reverse gears so that the copyboard remains
stationary.
At the time, the copyboard may be
moved to the right or left by hand.
b. Moving the Copyboard in Reverse
When SL2 goes ON while the main
motor is operating, the forward/reverse
switching mechanism engages with the
reverse gear, and the reverse gear rotates in
the direction of the arrow (Figure 3-13A),
causing the copyboard to move in reverse.
The copyboard moves in reverse about
two times as fast as when it moves forward
owing to the difference in.the gear ratio.
c. Moving the Copyboard Forward
When the copyboard has moved in
reverse and is positioned as shown in Figure
3-13B, the start position cam pushes down
the copyboard position sensor lever. When
SL2 goes ON in this position, the forward/
reverse switching mechanism moves to the
position shown in the figure, causing the for-
ward/reverse switching mechanism to
engage with the forward gear; as a result,
the forward gear rotates in the direction of
the arrow, moving the copyboard forward.
Copyboard
drive gear
Forward/Reverse
switching
mechanism
Copyboard drive
solenoid (SL2)
Figure 3-13A
Copyboard
drive gear
Forward/Reversal
switching
mechanism
Copyboard drive solenoid (SL2)
Figure 3-13B
3-14 COPYRIGHT © 1994 CANON INC. CANON PC300/820/325, FC210/230 REV.O JULY 1994: PRINTED IN JAPAN (IMPRIME AU JAPON)