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COPYRIGHT
©
1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
10–63
37.The Add Paper indicator fails to turn off.
Cassette
Sensor (PS4, PS7)
DC controller PCB
1
2
NO
NO
YES
Is the cassette set correctly?
Are the following sensors normal? (See the
instructions on how to check the
photointerrupers.)
PS4 Cassette paper sensor
PS7 Multi paper sensor
Set the cassette correctly.
Check the wiring from the
sensor lever and each sensor to
the DC controller PCB; if
normal, replace the sensor.
Replace the DC controller.
Actions
ChecksStep
Cause
Yes/No
38.The Jam indicator fails to flash.
Sensor (PSS5, PS6)
Control panel PCB
DC controller PCB
1
2
NO
NO
YES
Are the following sensors normal? (See the
instruction on how to check the
photointerrupters.)
PS5 Registration paper sensor
PS6 Delivery paper sensor
Execute service mode ‘409’ (control panel
check). Does the Jam indicator turn on?
Check the wiring from the
sensor lever and each sensor to
the DC controller PCB; if
normal, replace the sensor.
Check the wiring from the DC
controller PCB to the control
panel PCB; if normal, replace
the control panel PCB.
Replace the DC controller
PCB.
Actions
ChecksStep
Cause
Yes/No