Controlling The Primary Charging Wire Cleaning Mechanism; Operations; Conditions For Operation - Canon CLC 1120 Service Manual

H. Controlling the Primary Charging Wire Cleaning Mechanism

1. Operations

The primary charging wire is cleaned by moving the charging wire cleaner back and forth. The
charging wire cleaner takes about 12 sec to move forward and about 12 sec to move in reverse,
moving forward when PRIMFW is '1' and PRIMRV is '0', while moving in reverse when
PRIMFW is '0' and PRIMRV is '1'.

2. Conditions for Operation

1. The temperature of the fixing assembly is 130ºC or less when the power switch is turned on.
2. An image was formed on the photosensitive drum as many as 2000 times since the previous
cleaning operation. (The count is incremented by 4 for each full-color copy.)
3. When primary charging cleaning is executed in user mode.
(CW rotation, forward)
COPYRIGHT © 1999 CANON INC.
Primary charging
assembly
Charging wire
(CCW rotation, reverse)
DC driver PCB
Figure 6-309
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 6 IMAGE FORMATION SYSTEM
Cleaner
Primary charging
cleaning motor
6-27