LG LRE3193BD Service Manual page 64

CHECKING FLOW CHART BY FAILURE
F3 error (Button short error)
Or button does not input
Unplugged the unit
1
Check the connecting states between
Key pad and CN31 of Main PCB.
Is it OK?
Yes
No
Reconnect or adjust the
connection
-9-17-
Plug the unit
2 Replace the Key pad.
And then check button operation using
key test mode
To enter the test mode, follow these steps:
1. press the "CLEAR" button
2. press the "BAKE", "BROIL" button at the same time
3. press the "BAKE", "BROIL" button at the same time again.
Software version is displayed at the left digits
4. press the NUM "7" button
5. Check the button.
(Refer to the next page, appendix)
3
If button is not operated, Replace the Main PCB
Yes
Go to No 1
No