LG LSE4617ST Service Manual page 93

CHECKING FLOW CHART BY FAILURE
3
Is the DLB relay normal?
Measure the resistance
Normal : infinite
Abnormal : shorted
DLB
Relay
Tab 23(or Tab 24)
and Tab 25 : RY13
No
Replace the
relay PCB
Yes
Plug in the unit
4
Is the value of thermistor
normal? (Refer below)
Check with the test mode
To enter the test mode, follow these steps:
1. Press the any button, and encoder is placed
in the Off
2. Press the button in the following order
+/- ("+"and "-" hold for 3 seconds
simultaneously)
3. Press the OVEN LIGHT button again.
4. Select the "t3" by press the "+" button.
5. Press the START button.
Normal : Thermistor value at room temp is from
70˚F to 90
˚
F
9-18
Yes
Replace the
Main PCB
No