Fault Diagnosis And Troubleshooting - LG WM3431H Series Service Manual

8-2. FAULT DIAGNOSIS AND TROUBLESHOOTING

CAUTION
!
1. Be careful of electric shock or disconnecting the parts while trouble shooting.
2. First of all, check the connection of each part terminal with wiring diagram.
3. If you replace the MAIN PWB ASSEMBLY, put in the connectors correctly.
<PWB ASSEMBLY (MAIN)>
<PWB ASSEMBLY (MAIN)>
NO POWER
Is the supplied voltage 120 V AC?
YES
Is the led(1) on?
YES
Are the connectors (2) on the PWB loose?
Is wire of the PWB ASSEMBLY disconnected?
Replace PWB ASSEMBLY
NO
NO
19
Check the fuse or reset
NO
the circuit breaker.
Replace MAIN PWB
NO
ASSEMBLY
Reconnect.
YES
Reconnect.
YES