The Pre-Exposure Lamp Fails To Turn On; The Fixing Heater Fails To Turn On - Canon CLC5000 Service Manual

4.1.55 The pre-exposure lamp fails to turn ON.

Pre-exposure lamp (LA2)
1) Turn ON the power switch, and disconnect the connector J2239
NO:
Pre-exposure lamp (LA2 to LA5)
DC controller PCB
2) Connect J2239, and turn ON the power switch. Set the meter to the
YES: Replace the pre-exposure lamp.
NO:

4.1.56 The fixing heater fails to turn ON.

Connector
1) Are the fixing drawer connectors J6410 and J6019 and the connec-
NO:
2) Draw out the fixing unit, and set the meter to the ×1 range. Does
YES: Go to step 8.
Thermal switch (TP1, TP2)
3) Is there electrical continuity in the thermal switch?
NO:
COPYRIGHT © 2001 CANON INC.
CHAPTER 5 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
from the DC controller PCB. Set the meter to the ×100 range, and
measure the resistance between the following terminals on the har-
ness side. Is it about 20 ?
for C, J2239A-5 and -6
for M, J2239A-7 and -8
for Y, J2239A-9 and -10
for Bk, J2239A-11 and -12
Check the wiring from J2209 to the pre-exposure lamp; if normal,
replace the exposure lamp.
30VDC range, and measure the voltage between the following ter-
minals on the DC controller PCB. Does the voltage change from
about 0 V to about 24 V?
for C, J2239A-5 and -6
for M, J2239A-7 and -8
for Y, J2239A-9 and -10
for Bk, J2239A-11 and -12
Replace the DC controller PCB.
tors J2804 and J2808 on the AC driver PCB connected?
Connect them.
the index of the meter swing when the probe of the meter is con-
nected to the terminal of the following connectors of the fixing
drawer connector (J6410)?
J6410-1 and -2
J6410-3 and -4
Replace the thermal switch.
2000 2000 2000 2000 CANON CLC5000 REV.0 JAN. 2001
5-159