The Waste Toner Box Full Indicator Fails To Turn Off; The Add Paper Indicator Fails To Flash - Canon NP7160 Service Manual

CHAPTER 10 TROUBLESHOOTING

35. The Waste Toner Box Full indicator fails to turn off.

Cause
Step
Waste toner box
Waste toner box
Connector
Waste toner sensor
DC controller PCB

36. The Add Paper indicator fails to flash.

Cause
Step
Sensor (PS4, PS7)
Control panel PCB
DC controller PCB
10–62
COPYRIGHT © 1998 CANON INC.
Checks
1 Is the waste toner box mounted?
2 Is the waste toner box full?
3 Is the mouth of the waste toner box soiled?
4 Are the connectors to the waste toner sensor
connected securely?
5 Replace the waste toner sensor. Is the
problem corrected?
Checks
1
Are the following sensors normal? (See the
instructions on how to check the
photointerrupers.)
PS4 Cassette paper sensor
PS7 Multi paper sensor
2
Execute service mode '409' (control panel
check). Does the Add Paper indicator turn
on?
Yes/No
Yes/No
CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Actions
NO Install the waste toner box.
YES Replace the waste toner box.
YES Clean it. If the dirt cannot be
removed, replace the waste
toner box.
NO Connect the connectors
securely.
YES End.
NO Replace the DC controller
PCB.
Actions
Check the wiring from the
NO
sensor lever and each sensor to
the DC controller PCB; if
normal, replace the sensor.
Check the wiring from the DC
NO
controller PCB to the control
panel PCB; if normal, replace
the control panel PCB.
YES Replace the DC controller
PCB.