The Pre-Exposure Lamp Fails To Turn On - Canon 1000 Service Manual

45

The pre-exposure lamp fails to turn ON.

Cause Step
Pre-exposure
lamp (LA2)
Pre-exposure
lamp (LA2)
DC controller
PCB
COPYRIGHT © 2001 CANON INC.
Checks
1 Turn ON the power switch, and
disconnect the connector J2239
from the DC controller. Set the
meter to the ×100Ω range, and
measure the resistance between the
following terminals on the harness
side. Is it about 20Ω?
for Y, J2209B-1 and -2
for M, J2209B-3 and -4
for C, J2209B-5 and -6
for Bk, J2209B-7 and -8
2 Connect J2239, and turn ON the
power switch. Set the meter to the
30VDC range, and measure the
voltage between the following
terminals on the DC controller PCB.
Does the voltage change from about
0 V to about 24 V?
for Y, J2239A-1 and -2
for M, J2239A-3 and -4
for C, J2239A-5 and -6
for Bk, J2239A-7 and -8
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
Yes/No
NO
YES
NO
Action
Check the wiring from
J2209 to the pre-exposure
lamp; if normal, replace
the exposure lamp.
Replace the pre-exposure
lamp.
Replace the DC controller
PCB.
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