Other Troubleshooting - LG WT5070C series Service Manual

4-7. OTHER TROUBLESHOOTING

CAUTION
1. Be careful of electric shock if disconnecting parts while troubleshooting.
2. First of all, check the connection of each electrical terminal with the wiring diagram.
3. If you replace the main PCB assembly, reinsert the connectors correctly.
NO POWER
Is the supplied voltage
120V AC?(+10%, -15%)
Yes
Is the current rating of multi-
outlet power strip enough?
(Avoid connecting several
electric devices)
Yes
Is the connector connected to
PCB/Noise filter disconnected
or disassembled?
Yes
Check the fuse or
No
reset the circuit
breaker
Alternate with
No
explanation
Reconnect or
No
repair the
connector
Is LED on while the power is
on?
No
Is three pin wire of display
PCB broken?
Display PCB
Connecting connector
MAIN PCB~ Display PCB
36
Replace the MAIN
Yes
PCB ASSEMBLY
Replace the
Yes
DISPLAY PCB
ASSEMBLY