4–10
TROUBLESHOOTING MALFUNCTIONS
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?
Is the fuse on the composite power
supply PCB blown?
Cause
AC power
supply
Wiring, DC
load
Fuse
Composite
power
supply PCB
Step
1
2
Remedy
See “AC power is absent.”
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.
Replace the fuse.
Replace the composite
power supply PCB.
Yes/No
NO
YES
YES
NO
16
DC power is absent.
Cause
Lens motor
Blanking
drive
assembly
Blanking
cable
Step
1
2
3
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
NO
NO
Remedy
See “The lens fails to move.”
Correct so that the drive is
transmitted.
Re-route the cable.
17
The blanking shutter fails to operate.
Output
36V
GND
24V
GND
5V
GND
34V
GND
Connector
J11
J8
Pin No.
1
2
1
2
3
4
5
6
Remarks
To main
driver
PCB
To DC
control-
ler PCB
Содержание NP6621
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Страница 80: ...4 16 TROUBLESHOOTING MALFUNCTIONS ...
Страница 98: ...6 8 ARRANGEMENT AND FUNCTIONS OF THE ELECTRICAL PARTS D PCBs Figure 6 603 1 2 3 4 5 6 7 8 9 10 11 12 ...
Страница 108: ...6 18 ARRANGEMENT AND FUNCTIONS OF THE ELECTRICAL PARTS 4 Fixing Heater Driver PCB Figure 6 611 J402 1 J401 W1 W2 ...
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