LG LSRG309ST Service Manual page 63

CHECKING FLOW CHART BY FAILURE
Power On
4
Is the Relay operation signal
Nomal?
In Idle Mode (press the clear),
Check the voltage of Diode
1. Both D40 ends.
2. Both D41 ends
2. Both D41 ends
Normal:
- approximately 0 V
Abnormal:
- approximately 9.6V~15.6V
Yes
5
Check the electric wiring connection.
It would be have wrong connection or electric wiring in
defect.
Reconnect or replace the electric wiring.
Replace
No
the Main PCB
(EBR52349501)
D40(Broil)
D40(Bake)
10-14