The Fixing Heater Fails To Turn On - Canon 1130 Service Manual

54

The fixing heater fails to turn on.

Cause
Connector
------------
Thermal switch
(TP2, TP3)
Thermistor
(THM1, THM2,
THM3, THM4)
Upper heater (H1)
Lower heater (H2)
AC harness
COPYRIGHT © 2002 CANON INC.
Step
1 Are the fixing drawer connector
J18 of the transfer drum frame and
the connector J1024 of the DC
driver PCB connected securely?
2 Slide out the transfer drum frame.
Set the meter range to x1Ω, and
connect the meter probes to the
following terminals of the fixing
drawer connector; does the index
of the meter swing?
J18-1 and -3
J18-2 and -4
3 Is there electrical continuity in the
thermal switch?
4 Set the meter range to x1Ω, and
connect the meter probes to the
following terminals of the fixing
drawer connector; does the meter
index swing?
THM1: J500-A4 and -A5
THM2: J500-B7 and -B8
THM3: J500-A2 and -A3
THM4: J500-B9 and -B10
5 Does the index of the meter swing
when the meter probes are
connected to the electrodes on both
ends of the upper heater?
6 Does the index of the meter swing
when the meter probes are
connected to the electrodes on both
ends of the lower heater?
CANON CLC1100/1130/1150/1160/1180 REV.1 JAN. 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
Checks Yes/No Action
NO Connect the connectors
properly.
YES Go to step 8.
NO Replace the thermal
switch.
YES Replace the thermistor.
NO Check the heater to see
if it is mounted properly;
if normal, replace the
upper heater.
NO Check the heater to see
if it is mounted properly;
if normal, replace the
lower heater.
YES Check the AC harness
inside the fixing
assembly.
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