The Fixing Heater Fails To Operate - Canon iR105 Service Manual

CHAPTER 6 TROUBLESHOOTING

4.1.91 The fixing heater fails to operate

Multimeter cover
1) Is the multifeeder cover closed firmly?
NO:
Multifeeder cover open/closed sensor (PS56)
2) Is the multifeeder cover open/closed sensor mounted correctly?
NO:
YES: Replace the multifeeder open/closed sensor.
Fixing/feeding unit releasing lever sensor (PS28)
3) Is the fixing/feeding unit releasing lever sensor mounted correctly?
NO:
YES: Replace the fixing/feeding unit releasing lever sensor.
Thermal switch (TP1)
4) Slide out the fixing assembly, and connect the meter probes across
NO:
Fixing heater (H1, H2)
5) Slide out the fixing assembly, and connect the meter probes across
NO:
AC driver PCB, DC controller PCB
6) Is the voltage of the following connectors on the DC controller PCB
YES: Replace the AC driver PCB.
NO:
6-140
Close the multifeeder cover firmly.
Mount the multifeeder open/closed correctly.
Mount the fixing/feeding unit releasing lever sensor.
both terminals of the thermal switch (TP1). Is there electrical conti-
nuity?
Replace the thermal switch unit.
both terminals of the fixing heater (H1, H2). Is there electrical con-
tinuity?
Replace the fixing heater.
about 5 V?
Heater
Main heater (H1)
Sub heater (H2)
Replace the DC controller PCB.
COPYRIGHT© 2001 CANON INC.
(+)
J505-A11
J505-A13
2000 2000 2000 2000 CANON iR105 REV.0 JULY 2001