Reversing Operation - Canon CP660 Service Manual

B.

Reversing Operation

When the duplexing command arrives from the DC controller PCB, the duplexing dri-
ver PCB turns on the duplexing flapper solenoid (SL6), operating the duplexing flapper
so that paper will be moved to the duplexing unit.
When the leading edge of paper is detected by the reversal sensor (PS26), the
duplexing driver PCB rotates the duplexing motor (M8) counterclockwise (CCW; Note) to
move the paper to the machine's reversing assembly.
Then, a specific period of time after the reversal paper sensor (PS26) has detected
the trailing edge of the paper, the duplexing driver PCB switches the rotation of the
duplexing motor (M8) to clockwise direction to switch the paper path so that paper will be
moved along the duplexing lower guide to the feeding roller side of the duplexing unit.
Note:
If paper is not 11x17, A3, B4, or LGL, the duplexing driver PCB first drives the duplex-
ing motor (M8) and then will switch its rotation to high speed to move the paper to the
reversing assembly.
Reversing
roller
releasing
plate
Reversing
assembly
Reversing
roller
releasing
plate
Rear
assembly
COPYRIGHT © 1999 CANON INC.
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Duplexing upper guide
PS26
Duplexing lower guide
Duplexing unit
Reversing roller (CCW)
Duplexing motor
M8
Duplexing upper guide
PS26
Duplexing lower guide
Duplexing unit
Reversing roller (CW)
Duplexing motor
M8
Figure 5-403
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 5 PICK-UP/FEEDING SYSTEM
Duplexing feeding roller 1
Duplexing feeding roller 1
5-25