LG WD(M)-8070F(H)(B) Service Manual page 21

WD-8070F(H), WD-1070(5)F(H)
1. Be careful of electric shock or disconnecting the parts while troubleshooting.
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 ASSEMBLY (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 assembly (Power),
is the voltage AC 220-240V?
YES
Is connector disconnected or
or is the contact bad or cut?
Is wire of the PWB assembly (Display)
disconnected?
YES
Replace PWB assembly (Display).
NO
21
Check the fuse?
NO
Replace PWB assembly
NO
(Power).
Reconnect and repair
YES
connector.
Replace PWB assembly
NO
(Main).