Controlling The Itd Cleaning Roller - Canon CP660 Service Manual

CHAPTER 4 IMAGE FORMATION SYSTEM
C.

Controlling the ITD Cleaning Roller

The ITD cleaning roller is pushed against the intermediate transfer drum immediate-
ly before secondary transfer.
Normally, the ITD cleaning roller remains away from the intermediate transfer drum,
and is forced against the intermediate transfer drum as needed.
The DC controller PCB causes the ITD cleaning roller solenoid drive signal
(CLNRON) to go '1' at the appropriate timing; in response, the ITD cleaning roller sole-
noid (SL1) turns on, the ITD cleaning roller cam starts to operate, and the ITD cleaning
roller moves against the intermediate transfer drum.
When secondary transfer ends and ITD cleaning is turned on, the DC controller PCB
turns off the ITD cleaning roller solenoid (SL1) to move the ITD cleaning roller from the
intermediate transfer drum.
ITD cleaning roll solenoid
SL1
4-20
COPYRIGHT © 1999 CANON INC.
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ITD cleaning roller cam
ITD cleaning roller
Figure 4-403
Intermediate
transfer drum
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)