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TROUBLESHOOTING MALFUNCTIONS
16
DC power is absent.
Cause
Step
AC power
1
supply
Wiring, DC
2
load
Fuse
Composite
power
supply PCB
17
The blanking shutter fails to operate.
Cause
Step
Lens motor
1
Blanking
2
drive
assembly
Blanking
3
cable
4–10
Checks
Is AC power supply present between
the following terminals?
• Composite Power Supply PCB
J2-1 and J2-3 (J2 is the 3-pin
connector found on the power cord
mount.)
Turn OFF the power, and disconnect
all following connectors:
• Composite Power Supply PCB
J11, J8
Set the tester to the 30VDC
range, and turn ON the power switch;
then, measure the voltage between
the following terminals. Is the voltage
normal?
Connector
Pin No.
Output
J11
1
36V
2
GND
J8
1
24V
2
GND
3
5V
4
GND
5
34V
6
GND
Is the fuse on the composite power
supply PCB blown?
Checks
Does the lens move?
Is the drive of the lens motor transmit-
ted to the gear of the blanking drive
assembly?
Is the blanking cable routed correctly?
Yes/No
NO
See "AC power is absent."
YES
Turn OFF the power switch,
and connect one of the
disconnected connectors.
Then, turn ON the power
switch. Repeat this for all
connectors to identify the
connector that triggered the
protection circuit. Check the
wiring from that connector to
the DC load.
Remarks
To main
driver
PCB
To DC
control-
ler PCB
YES
Replace the fuse.
NO
Replace the composite
power supply PCB.
Yes/No
NO
See "The lens fails to move."
NO
Correct so that the drive is
transmitted.
NO
Re-route the cable.
Remedy
Remedy
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Table of Contents
Troubleshooting
