Canon CLC 1120 Service Manual page 673

CHAPTER 13 TROUBLESHOOTING
Cause
AC power supply
SSR1
DC power supply
PCB, CPU PCB
13-146
COPYRIGHT © 1999 CANON INC.
Step Checks
7 Slide in the transfer drum frame,
and turn on the power switch. Set
the meter range to 250 VAC, and
connect the meter probes to the
following terminals of the faston of
the AC power cut relay (RL1);
does the index of the meter swing?
Terminals 6 and 8 of RL1
8 Set the meter range to 10 VDC, and
connect the meter probes to the
following terminals of the DC
driver PCB; does the index of the
meter indicate about +5 V?
J1024-B1 and B4 (GND)
J1024-B2 and -B4 (GND)
Yes/No
NO
YES
NO
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Check the power switch
(SW1) and the AC
power cut relay (RL1); if
normal, see "AC power
is absent."
Check the wiring from
the AC power cut relay
(RL1) to SSR1 and from
SSR1 to the fixing
assembly drawer
connector; if normal,
replace SSR1.
Replace the DC driver
PCB or the CPU PCB.