Malfunctions - Canon CLC 1120 Service Manual

CHAPTER 13 TROUBLESHOOTING
36 E718
Cause
Power supply
PCB (projector)
Connector, wiring
IP-PRJ PCB, IP-
MAIN PCB, CPU
PCB
37 E800
Cause
Malfunction
Connector
DC fuse PCB
Power switch
(SW1)
DC driver PCB,
CPU PCB
13-128
COPYRIGHT © 1999 CANON INC.
Step Checks
1 Is the power supply PCB of the
projector normal?
2 Is the connection between J216/
J217,/J218 on the IP-MAIN PCB
and J216/J241/J242 on the IP-PRJ
PCB faulty?
Step Checks
1 Turn off and then on the power
switch. Is the problem corrected?
2 Is the connection of the relay
connector J8 of the power switch
SW1 faulty?
3 Is 24 V present between J932-1
and -7 on the DC fuse PCB?
4 Replace the power switch. Is the
problem corrected?
Yes/No
NO
YES
NO
Yes/No
YES
YES
NO
YES
NO
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Replace the power
supply PCB.
Connect the connectors
properly.
Try replacing the
following parts in turns:
· IP-PRJ PCB
· IP-MAIN PCB
· CPU PCB
Action
End.
Connect the connector
properly.
Replace the DC fuse
PCB.
End.
Check the wiring from
the DC driver PCB to
the power switch; if
normal, replace the DC
driver PCB or the CPU
PCB.