Fault Diagnosis And Troubleshooting - LG WD(M)-16220(5)FB Service Manual

8-2.FAULT DIAGNOSIS AND TROUBLESHOOTING

CAUTION
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 MAIN PWB ASSEMBLY, put in the connectors correctly.
(1)
MAIN PWB ASSEMBLY(MAIN)
MAIN PWB ASSEMBLY(MAIN)
NO POWER
When measuring the voltage of the outlet,
is the voltage AC 220-240V?
Is the led (1) on?
When measuring the voltage of White(3Pin)
connector of the PWB ASSEMBLY is the voltage
AC 220-240V?
Replace PWB ASSEMBLY
YES
YES
YES
19
NO Check the fuse
Replace PWB
NO
ASSEMBLY
NO
Check the harness
Assembly