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Fault Diagnosis And Troubleshooting - LG WD-803(4)0(W)(F)(H) Service Manual

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9-2. FAULT DIAGNOSIS AND TROUBLESHOOTING

I WD-1223(5)F(H)(B)/WD-1243(5)F(H)(B) / WD-1041(3)F(H)B / WD-102(4)1(5)F(H)B / WD-803(4)0F(H)B
CAUTION
1. Be careful of electric shock or disconnecting the parts while troubleshooting.
2. First of all, check the connection of each part terminal with wiring diagram.
3. Voltage of each terminal is AC 220-240V while applying an electric current.
(except secondary part of the transformer and sensor pressure)
(1)
<PWB ASSEMBLY (MAIN)>
(2)
(6)
(5)
<PWB ASSEMBLY (MAIN)>
NO POWER
When measuring the voltage of the outlet,
is the voltage 220-240V~?
Is the LED (1) on?
When measuring the voltage of natural
connector (5,6) is the voltage DC 10~16.5V?
Is connector (2) disconnected or
disassembled?
Is wire of the PWB assembly (Display)
disconnected?
Replace PWB assembly (Display)
(6871FC2272D)
YES
YES
YES
NO
NO
29
Check the fuse?
NO
Replace PWB assembly
NO
(Main).
Replace PWB assembly
NO
(Main).
Reconnect the PWB
YES
assembly (Display).
Reconnect the PWB
YES
assembly (Display).

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