Canon CLC 5000, Service Manual

Page: 516 / 757

COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON CLC5000 REV.0 JAN. 2001
CHAPTER 5 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
5-159
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
from the DC controller PCB. Set the meter to the ×100
Ω Ω
Ω Ω
Ω
range, and
measure the resistance between the following terminals on the har-
ness side. Is it about 20
Ω Ω
Ω Ω
Ω
?
for C, J2239A-5 and -6
for M, J2239A-7 and -8
for Y,
J2239A-9 and -10
for Bk, J2239A-11 and -12
NO: Check the wiring from J2209 to the pre-exposure lamp; if normal,
replace the exposure lamp.
Pre-exposure lamp (LA2 to LA5)
DC controller PCB
2) Connect J2239, and turn ON the power switch. Set the meter to the
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
YES: Replace the pre-exposure lamp.
NO:
Replace the DC controller PCB.
4.1.56 The fixing heater fails to turn ON.
Connector
1) Are the fixing drawer connectors J6410 and J6019 and the connec-
tors J2804 and J2808 on the AC driver PCB connected?
NO: Connect them.
2) Draw out the fixing unit, and set the meter to the ×1
Ω Ω
Ω Ω
Ω
range. Does
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
YES: Go to step 8.
Thermal switch (TP1, TP2)
3) Is there electrical continuity in the thermal switch?
NO: Replace the thermal switch.