Controlling The C Sensor - Canon CLC 1120 Service Manual

B. Controlling the C Sensor
The copier is equipped with a C sensor (PS4) to control the timing at which the transfer output
and internal/external static eliminator output is generated, thereby enabling increases in copying
speed.
The sensor is found inside the transfer drum, and is used to control the timing of high-voltage
output in relation to the position of copy paper.
The relationship between the C sensor and the signal plate is as follows:
Signal plate
Signal plate C
Signal plate D
a. State of the Transfer Drum and the Signal Plate D
Transfer driver PCB
DC driver PCB
HVT-DC/HVT-
AC PCB
Figure 6-102 Turning On the Transfer High Voltage by the Signal Plate D
COPYRIGHT © 1999 CANON INC.
Signal state
Table 6-102
Side A (copy paper)
C sensor (PS4)
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 6 IMAGE FORMATION SYSTEM
Description
Turns on the side B internal/external static
eliminator high-voltage output.
Tuns on the side A transfer high-voltage
output.
Turns on the side A internal/external static
eliminator high-voltage output.
Turns on the side B transfer high-voltage
output.
Transfer blade
Signal plate D
Side B (copy paper)
6-3