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COPYRIGHT
©
1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
10–61
33.The Add Toner indicator fails to turn off.
Connector
Toner sensor (TS1)
DC controller PCB
1
2
3
YES
NO
YES
NO
Open and close the front door. Does it turn
off?
Are the connector J15 of the toner sensor,
relay connectors J721 and 720, and
connector J102 on the DC controller PCB on
the DC controller PCB connected securely?
Replace the toner sensor. Is the problem
corrected?
End.
Connect the connectors
securely.
End.
Replace the DC controller
PCB.
Actions
ChecksStep
Cause
Yes/No
34.The Waste Toner Box Full indicator fails to flash/turn on.
Connector
Waste toner sensor
Control panel PCB
DC controller PCB
1
2
3
NO
YES
NO
YES
Are the connectors up to the waste toner
sensor connected securely?
Replace the waste toner sensor. Is the
problem corrected?
Execute service mode ‘409’ (control panel
check). Does the Waste Toner Box Full
indicator turn on?”
Connect the connectors
securely.
End.
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
Checks
Cause
Yes/No
Step