Canon CLC5000 Service Manual page 463

CHAPTER 5 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
c. E000–XX20, XX30, XX40, XX50 (high-order 2 digits representing type as XX=01
indicating upper heater and 02, lower heater)
1) Clear 'E000' (*), and turn ON the power switch. Does the fixing
NO:
YES: Go to step 7.
Fixing thermistor (open circuit)
2) Open the front cover and the delivery assembly to cool the fixing
NO:
Thermistor
3) Is the fixing oil thermistor upper, lower (THM1, THM2) in even
NO:
Environment
4) Does the problem occur only when the machine is turned on for the
YES: • Advise the user that the operating environment is outside the
Thermistor switch (activation)
5) Is there electrical continuity in the thermal switch (TP1, TP2)?
NO:
Main thermistor
DC controller
6) Replace the thermistor (upper/lower). Is the problem corrected?
YES: End.
NO:
5-106
heater turn ON?
• Check by the eye. Be sure to turn OFF the power switch immedi-
ately after the check.
See "The fixing heater fails to turn on."
roller.
Close the delivery assembly and the front cover; then, set the meter
to the 5VDC range, and measure the voltage between J2209A-13
(+: FRST) and J2209A-12 (–; GND).
Likewise, measure the voltage between J2209B-12 (+; FRST) and
J2209B-1 (–; GND).
Does the voltage decrease from about 5 V gradually when the
power switch is turned ON?
• Turn OFF the power switch immediately after the check.
Check the wiring from J2209 to the fixing thermistor; if normal,
replace the fixing thermistor.
contact with the upper/lower fixing roller?
Re-install it.
first time in the morning?
specification.
• Advise the user not to turn on the power while the room is cold.
Replace the thermal switch.
Replace the DC controller.
COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON CLC5000 REV.0 JAN. 2001