Canon CLC5000 Service Manual page 517

CHAPTER 5 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
Thermistor (TH1, TH3)
4) Set the meter to the ×1 range. Does the index of the meter swing
YES: Replace the thermistor.
Upper heater (H1)
5) Does the index of the meter swing when the probe of the meter is
NO:
Lower heater (H2)
AC harness
6) Does the index of the meter swing when the probes are connected to
NO:
YES: Check the AC harness inside the fixing assembly.
AC power supply
7) Push in the fixing unit, and turn ON the power switch; then, set the
NO:
Triac
DC controller
8) Set the meter to the 10VDC range, and connect the probes of the
YES: Check the wiring from relay (RL1) to AC driver PCB and from the
NO:
5-160
when the probe of the meter is connected to the following connector
of the fixing drawer connector (J6019)?
J6019A12 and 13
J6019B-1 and 2
connected to both terminals of the upper heater?
Check the installation of the heater; if normal, replace the upper
heater.
both ends of the lower heater?
Check the installation of the heater; if normal, replace the lower
heater.
meter to the 250VA range.
Does the index of the meter swing when the probes of the meter are
connected to the following terminals of the faston of RL1?
FT35 and FT40
Check the power switch and the relay (RL1); if normal, see "AC
power is absent."
meter to the terminals of the following connectors of the DC con-
troller PCB. Does the index of the meter indicate '+5 V'?
J2241-14 and GND
J2241-13 and GND
triac to the fixing assembly drawer connector; if normal, replace
the triac.
Replace the DC controller PCB.
COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON CLC5000 REV.0 JAN. 2001