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CHAPTER 10 TROUBLESHOOTING
10–64
COPYRIGHT
©
1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
39.The Jam indicator fails to turn off.
Sensor
DC controller PCB
1
2
3
NO
YES
NO
Has all paper been removed from inside the
copier?
Execute service mode ‘101’ (jam type
display) to find out which sensor detected the
jam. Is there paper around the sensor?
Is the sensor of step 2 normal? (See the
instructions on how to check the
photointerrupters.)
Remove the paper.
Remove the paper.
Check the wiring from the
sensor lever and each sensor to
the DC controller PCB; if
normal, replace the sensor.
Replace the DC controller
PCB.
Actions
ChecksStep
Cause
Yes/No
40.The Set Control Card indicator fails to turn on.
Control Card IV N
Control panel PCB
DC controller PCB
1
2
YES
YES
NO
Can copies be made without setting the
Control Card IV N?
Replace the control panel PCB. Does the
indicator turn on?
Check the connector of the
Control Card IV N for a short
circuit.
End.
Replace the DC controller
PCB.
Actions
ChecksStep
Cause
Yes/No