Controlling The Cleaning Belt Drive Mechanism - Canon ImageRunner 600 Service Manual

CHAPTER 8 FIXING SYSTEM
C.

Controlling the Cleaning Belt Drive Mechanism

Figure 8-203 shows the construction of the control system used to control the cleaning belt
drive mechanism.
Length Detection 1
When the cleaning belt length detecting flag comes into contact with the cut-off (300 mm from
the end of the cleaning belt), the cleaning belt length warning sensor (PS8) detects the flag,
causing the message "Web Running Out" on the control panel. (Copying may continue.)
Reference:
After the message
"Cleaning Belt Run-
ning Out" has ap-
peared, about 15,00
copies (A4) may be
made. (In the case of
A3, about 7,500 cop-
ies.)
Cleaning belt
roller (feed side)
J508B
0V
1
WEB-LESS
2
5V
3
0V
4
WEB-WARN
5
5V
6
20
Figure 8-203 Construction of the Control System
8-8
COPYRIGHT © 2000 CANON INC.
Cleaning belt
length detecting flag
To PS7
To PS8
CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
Cleaning belt absent
sensor (PS7)
Length detection 2
If copying continues after detection by
PS8, the flag moves farther down,
causing error code E005 upon
detection by the cleaning belt length
sensor (PS7).
(front)
Cleaning belt length
warning sensor (PS8)