Troubleshooting Malfunctions; E000 - Canon NP6330 Service Manual

IV. TROUBLESHOOTING MALFUNCTIONS
A. Troubleshooting Malfunctions
1

E000

Cause Step
Thermistor
(TH1; connector
or open circuit)
Thermistor
Thermistor
Operating
environment
Thermistor
DC controller
PCB
COPYRIGHT © 1997 CANON INC.
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Checks
1 Reset 'E000' using No.401 in
service mode [4].
Open the front door and the
delivery assembly to cool the
fixing roller. Does the fixing heater
turn on when the power switch is
turned on once again? (Check by
the eye. Be sure to turn off the
power switch immediately after the
check.)
2 Open the front door and the
delivery assembly to cool the
fixing roller. Close the front door
and the delivery assembly, and
check No.106 in service mode [1].
Has the value changed? (Be sure
to turn off the power switch after
the check.)
3 Is the thermistor in even contact
with the upper fixing roller?
4 Clean the contact face of the ther-
mistor. Is the problem corrected?
5 Does the problem occur only
when the power is turned on for
the first time for the day?
6 Replace the thermistor. Is the
problem corrected?
CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 11 TROUBLESHOOTING
YES/NO Action
NO See "The fixing heater
fails to operate."
YES Check the wiring from
J109 on the DC con-
troller PCB through the
relay connector (J34) to
the thermistor; if normal,
replace the thermistor.
NO Re-install it.
YES
End.
YES • Advise the user that
the operating envi-
ronment is outside
the specifications.
• Advise the user not
to turn on the power
before the room is
warm enough.
YES End.
NO Replace the DC
controller PCB.
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