Canon CLC 1120 Service Manual page 56

CHAPTER 2 BASIC OPERATION
2. Controlling Side A and Side B
The transfer drum retains as many as two sheets of copy paper at the same time. As such, two
signal plates operating in conjunction with the transfer drum and the sensors (PS2, side A sensor;
PS3, side B sensor) found inside the transfer drum are used to generate image leading signals of
their own (ITOP-A, ITOP-B).
Transfer drum PCB
DC driver PCB
CPU PCB
a. Transfer Drum When Copying on Side A
Transfer drum PCB
DC driver PCB
CPU PCB
2-8
COPYRIGHT © 1999 CANON INC.
Side A copy paper
Side A image
leading edge signal
Linking plate
Side A sensor (PS2)
Figure 2-204
Side B copy paper
Side B image
leading edge signal
Side B sensor signal plate
Figure 2-205
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Side B sensor signal plate
Side A sensor signal plate
Side A sensor signal plate
Side B sensor (PS3)
Transfer drum
Linking plate