LG LDE4415ST Service Manual page 82

3
Is the DLB relay normal?
Measure the resistance
Normal: infinite
Abnormal : shorted
Tab 13 and Tab 14 : RY7
Tab 24 and Tab 25: RY13
Yes
TROUBLESHOOTING
Replace the Relay
No
PCB
Upper DLB
Relay
Lower DLB
Relay
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 CLEAR button
(2) press the upperBAKE and SPEED BROIL buttons
at the same time
(3) press the upper BAKE and SPEED BROIL
buttons at the same time again.
(4)press the NUM "3" button
Normal: Thermistor value at room temp is from 70℉
to 90℉
7-19
No
Replace the Main
PCB
Current Oven
Temp