Canon PC400 Service Manual page 49

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, 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.
COPYRIGHT © 1998 CANON INC.
Reversing gear
Forward/Reverse
switching
mechanism
Reverse
Figure 3-104B
CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 3 EXPOSURE SYSTEM
Copyboard
drive gear
M1
Main motor
Copyboard drive
solenoid (SL2)
3-5