Controlling The Post-Cleaning Charging Current; Operations - Canon CLC 1120 Service Manual

CHAPTER 6 IMAGE FORMATION SYSTEM
F. Controlling the Post-Cleaning Charging Current

1. Operations

The post-cleaning charging mechanism has the following items of control:
1. Controlling the static eliminating charge to a constant current level.
Each of the signals is used for the following:
[1] HVCC (post-cleaning charge ON/OFF control signal)
When '1', the high-voltage output is ready.
[2] HVCI (post-cleaning charge level control signal)
Controlled to +3 to +11 V; at +11 V or less, the high-voltage output is generated.
DC driver PCB
J1012
-A8
-A7
6-24
COPYRIGHT © 1999 CANON INC.
[1]
HVCC
[2]
HVCI
Figure 6-306
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
HVT-DC PCB
J411
-6
-7
Post-cleaning
T302
charge