Controlling The Developing Bias - Canon ImageRunner iR8500 Series Service Manual

When the toner cartridge
door is closed, '1'.
Related Error Code
E025
(cartridge toner feed motor fault)

8.6.4 Controlling the Developing Bias

iR105i/iR105+ / iR9070 / iR85+ / iR8070
The developing bias is controlled for the following:
[1] DC bias constant voltage
[2] AC bias constant voltage
12 V is applied to turn on the
cartridge motor.
J512B
1
CRGDR-OPN
2
5V
3
CRGM-ON
4
0V
5
5V
6
CRG-DTC
7
14
When the cartridge is set, '0'.
An overcurrent caused by an overload on the motor has been
detected twice.
M6
PS59
MSW1
Toner cartridge motor drive switch
When the door is open, power to
the motor is stopped.
Cartridge sensor
Toner cartridge cover open/closed sensor
F-8-36
T-8-17
Toner feed motor
(inside the cartridge)
Chapter 8
0006-9811
8-27