Fault Diagnosis And Troubleshooting - LG F1***ND1 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 PWB assembly (Main), put in the connectors correctly.
<PWB ASSEMBLY (MAIN)>
NO POWER
When measuring the voltage of the
outlet, is the voltage AC 220-240V?
YES
When measuring the voltage of
Yellow(BN), Black(BL) connector of the
PWB assy, is the voltage AC 220-240V?
YES
Replace PWB assembly.
ALL BUTTONS ARE INOPERABLE
Is Child Lock set?
NO
First, unplug the power cord and plug
again.
Check the buttons are working.
NO
Visit to check
NO
NO
YES
YES
20
Check the fuse
Check the harness
Assembly.
Cancle the
Child-Lock
Normal