LG WD(M)-8070F(H)(B) - FAULT DIAGNOSIS AND TROUBLESHOOTING

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9-2. FAULT DIAGNOSIS AND TROUBLESHOOTING
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. If you replace the PWB assembly (Main), put in the connectors correctly.
CAUTION
NO
NO
NO
YES
YES
YES
YES
NO
NO
YES
<PWB ASSEMBLY (MAIN)>
<PWB ASSEMBLY (MAIN)>
(1)
(2)
(5)
(6)
Check the fuse?
Replace PWB assembly
(Main).
Replace PWB assembly
(Main).
Reconnect the PWB
assembly (Display).
Reconnect the PWB
assembly (Display).
When measuring the voltage of the outlet,
is the voltage AC 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)
NO POWER
■ WD(M)-8070F(H)B, WD(M)-1070(5)F(H)B, WD(M)-1170(5)F(H)B, WD(M)-1270(5)F(H)B, WD(M)-1370(5)F(H)B
WD(M)-8074F(H)B, WD(M)-1074(6)F(H)B, WD(M)-1174(6)F(H)B, WD(M)-1274(6)F(H)B, WD(M)-1374(6)F(H)B
WD-8078FHB, WD-1078FHB, WM-1171(6)FHB, WM-1371(6)FHB, WD-1271FB