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24. The scanning lamp fails to turn on.
25. The lens fails to move.
COPYRIGHT
©
1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
10-75
CHAPTER 10 TROUBLESHOOTING
Checks
Turn off the power switch, and
disconnect the power plug. Is the
lamp attached correctly?
Are the ends of the scanning lamp
black?
Replace the DC controller PCB. Is
the problem corrected?
Cause
Scanning lamp
Scanning lamp
DC controller
PCB
Composite
power supply
PCB
Step
1
2
3
Results
NO
YES
YES
NO
Action
Re-attach the lamp.
Replace the scanning
lamp.
Replace the DC
controller PCB.
Check the wiring
between the DC
controller PCB and the
composite power supply
PCB; if normal, replace
the composite power
supply PCB.
Checks
Turn off the power switch, and
detach the rear cover. Do the
change solenoid (SL1) turn on at
power-on? (Check with the naked
eye.)
Are the lens cable, pulley, and rail
normal?
Is 34 V being generated at the
J210-5 on the composite power
supply PCB?
Replace the lens motor. Is the
problem corrected?
Cause
Change
solenoid
(SL1)
Lens cable,
pulley, rail
DC power
supply
DC controller
PCB
Lens motor
(M3)
Step
1
2
3
4
Results
NO
NO
NO
NO
YES
Action
Check the wiring
between the DC
controller and SL1; if
normal, replace SL1.
Check the lens cable,
pulley, and rail; as
necessary, clean or re-
route the cable.
See “DC power supply is
absent.”
Replace the DC
controller PCB.
End.