Fault Diagnosis And Troubleshooting - LG WM2487H MA 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
BL WH BL BK
YL
YL
RD
BK
RD
YL
BL
BL WH

WH
RD
SB
SB
WH SB WH
BL WH BL BK
YL
YL
RD
BK
RD
YL
BL
BL WH

WH
RD
SB
SB
WH SB WH
NO POWER
Is the supplied voltage 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?
Is wire of the DISPLAY PWB ASSEMBLY
broken?
YES
Replace DISPLAY PWB ASSEMBLY
or repair wire.
NO
21
Check the fuse or reset
NO
the circuit breaker.
NO Replace the FILTER
ASSEMBLY (CIRC).
Replace MAIN PWB
NO
ASSEMBLY.
YES
Reconnect.
Replace the MAIN PWB
NO
ASSEMBLY.