Fault Diagnosis And Troubleshooting - LG WM2277H Series Service Manual

8-2. FAULT DIAGNOSIS AND TROUBLESHOOTING

CAUTION
1. Be careful of electric shock if disconnecting parts while troubleshooting.
2. First of all, check the connection of each electrical terminal with the wiring diagram.
3. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly.
Connector
NO POWER
Is the supplied voltage 110/120 V AC?
YES
Is the voltage between the 2 FILTER ASSEMBLY
connectors 120 V AC?
YES
Is the LED (1) on?
YES
Are the connectors (2) on the PWB loose?
NO
Is wire of the DISPLAY PWB ASSEMBLY
broken?
YES
Replace DISPLAY PWB ASSEMBLY
or repair wire.
NO
NO
NO
YES
NO
23
Check the fuse or reset
the circuit breaker.
Replace the FILTER
ASSEMBLY (CIRC).
Replace MAIN PWB
ASSEMBLY.
Reconnect.
Replace the MAIN PWB
ASSEMBLY.