Canon NP6621, Service Handbook, Page: 78 / 146

4–14
TROUBLESHOOTING MALFUNCTIONS
Cause
Change
solenoid
(SL1)
Lens cable,
Pulley, Rail
DC power
supply
DC control-
ler PCB
Lens motor
(M3)
Step
1
2
3
4
Checks
Turn OFF the power switch, and
remove the rear cover. Does the
change solenoid (SL1) turn ON when
the power switch is turned ON?
(Check by the naked eye.)
Are the lens cable, pulley, and rail
normal?
Is the 34V output present at J8-5 on
the composite power supply PCB?
Replace the lens motor. Is the problem
corrected?
Remedy
Check the wiring from the
DC controller to the SL1: if
normal, replace SL1.
Check the lens cable, pulley,
and rail; as necessary, clean
or re-route the cable.
See “DC power is absent.”
Replace the DC controller
PCB.
End.
24 The lens fails to move.
Yes/No
NO
NO
NO
NO
YES
Cause
DC controller
PCB
Fixing
heater driver
PCB
Step
1
2
Checks
Is ‘E000’ indicated?
Replace the DC controller PCB. Is the
problem corrected?
Remedy
See “E000.”
End.
Replace the fixing heater
driver PCB.
Yes/No
YES
YES
NO
25 The fixing heater fails to operate.