Canon CP660 Service Manual page 312

CHAPTER 10 TROUBLESHOOTING
1 E000/E003
Cause Step
Upper thermis- 1
tor (open cir-
cuit)
Lower thermis- 2
tor (open cir-
cuit)
Upper fixing 3
heater, Upper
thermal switch
(open circuit)
Lower fixing 4
heater, Lower
thermal switch
(open circuit)
Upper/Lower 5
thermistor
Upper/lower 6
thermistor
Connector 7
Power supply 8
(printer unit)
:
Caution
If E001 or E003 is indicated, be sure to discharge the error memory capacitor (C259)
on the DC controller PCB after troubleshooting the problem, as it may contain error
memory. (Short JP201 on the DC controller PCB to discharge C259.)
10-30
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Checks
Remove the fixing assembly, and
measure the resistance between the
connectors J26F-A4 (FXTHU) and
J26F-A3 (GND) on the fixing assem-
bly side. Is it between 250 K and
600 K (normal temperature)?
Measure the resistance between the
connectors J26F-A2 (FXTHL) and
J26F-A1 (GND) on the fixing assem-
bly side. Is it between 250 K and
600 K (normal temperature)?
With the fixing assembly removed, is
there electrical continuity between
the connectors J27F-3 (HTUH) and
J27F-4 (HTUC) on the fixing assem-
bly side?
Is there electrical continuity between
the connectors J26F-3 (HTLH) and
J26F-4 (HTLC) on the fixing assem-
bly side?
Is the upper/lower thermistor in even
contact with the upper/lower fixing
roller?
Mount the thermistor properly.
Are the connector J222 on the DC
controller PCB and the connector
J26 of the fixing assembly connect-
ed securely?
Replace the power supply of the
printer unit. Is the problem
corrected?
Yes/No
NO
NO
NO
NO
NO
YES
NO
YES
NO
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Check the wiring from
the connector J222 on
the DC controller PCB
to the upper thermistor;
if normal, replace the
upper thermistor.
Check the wiring from
the connector J222 on
the DC controller PCB
to the lower thermistor;
if normal, replace the
lower thermistor.
Check the upper fixing
heater and the thermal
switch. Replace any
problem parts.
Check the lower fixing
heater and the lower
thermal switch.
Replace any problem
parts.
Mount the thermistor
properly.
Clean the area of con-
tact with the
upper/lower fixing
roller.
Connect the connec-
tors securely.
End.
Replace the DC control
PCB.