Canon PC400 Service Manual - Page 49

Moving the Copyboard in Reverse, Stopping the Copyboard

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

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