Canon CP660 Service Manual page 313

2 E001
Cause Step
Upper thermis- 1
tor (short cir-
cuit)
Lower thermis- 2
tor (short cir-
cuit)
Power supply 3
(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.)
3 E004
Cause Step
Upper fixing 1
heater/Upper
thermal switch
(open circuit)
Lower fixing 2
heater, Lower
thermal switch
(open circuit)
Connectors 3
Power supply 4
(printer unit)
COPYRIGHT © 1999 CANON INC.
Download free service manual at http://printer1.blogspot.com
Checks
With the fixing assembly removed,
measure the resistance between the
connectors J26F-A4 (FXTHU) and
J26F-A3 (GND) on the fixing assem-
bly side. Is it 2 K or less?
Measure the resistance between the
connectors J26F-A2 (FXTHL) and
J26F-A1 (GND) on the fixing assem-
bly side. Is it 2 K or less?
Replace the power supply unit of the
printer unit. Is the problem
corrected?
Checks
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?
Are the connector J222 on the DC
controller PCB, connector J26 of the
fixing assembly, and connector J101
of the printer unit power supply con-
nected securely?
Replace the power supply of the
printer unit. Is the problem
corrected?
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
Yes/No Action
YES Check the wiring from
the connector J222 on
the DC controller PCB
to the upper thermistor;
if normal, replace the
upper thermistor.
YES Check the wiring from
the connector J222 on
the DC controller PCB
to the lower thermistor;
if normal, replace the
lower thermistor.
YES End.
NO Replace the DC con-
troller PCB.
Yes/No Action
NO Check the upper fixing
heater and the upper
thermal switch.
Replace the problem
parts.
NO Check the lower fixing
heater and the lower
thermal switch.
Replace the problem
parts.
NO Connect the connec-
tors securely.
YES End.
NO Replace the DC con-
troller PCB.
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