Diagnosis And Troubleshooting - LG CW2079CWD Service Manual

. DIAGNOSIS AND TROUBLESHOOTING

9
WARNING
!
1. Be careful of electric shock if disconnecting parts while troubleshooting.
2. First, check the connection of each electrical terminal with the wiring diagram.
3. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly.
1
3
4
5 5
5
5
WB ASSEMBLE, DIS LAY
NO POWER
Is the supplied voltage 120 V AC?
YES
Is the voltage between the FILTER ASSEMBLY
connectors and 120 V AC?
YES
Is the LED lamp on?
YES
Are the connectors on the PWB loose?
Is wire of the DISPLAY PWB ASSEMBLY
broken?
YES
Replace DISPLAY PWB ASSEMBLY
or repair wire.
O
21
O
Check the fuse or reset
the circuit breaker.
O
Replace the FILTER
ASSEMBLY (CIRC).
Replace MAIN PWB
O
ASSEMBLY.
YES
Reconnect.
Replace the CABLE
O
(HARNESS)