Fault Diagnosis And Trouble Shooting - LG WD-8050F Service Manual

8-2.FAULT DIAGNOSIS AND TROUBLE SHOOTING

1. Be careful of electric shock or disconnecting the parts while trouble shooting.
CAUTION
2. First of all, check the connection of each part terminal with wiring diagram.
3. Voltage between each terminal is AC 220-240V while applying an electric current
(except secondary part of the transformer and sensors)
2
1
PWB ASSY (POWER)
3
NO POWER
When measuring the voltage of the outlet,
is the voltage AC 220-240V?
YES
When measuring the voltage of blue
connector of the PWB assy (Power),
is the voltage AC 220-240V?
YES
Is ¤Øconnector disconnected or
or is the contact bad or cut?
Is wire of the PWB assy(Display)
disconnected?
YES
Replace PWB assy(Display)
NO
18
Check the fuse?
NO
Replace PWB assy
NO
(Power)
Reconnect and repair
YES
connector.
Replace PWB assy(Main)
NO