LG LDG4313BD Service Manual page 68

3
Range Of the resistance
igniter
Upper Broil
Upper Bake
Conv. Heater
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 CLEAR button
(2) press the upper BAKE and
BROIL buttons at the same time.
(3) press the upper BAKE and
BROIL buttons at the same time again.
(4) press the NUM 3 button
Normal : Themistor value at room temp is from
70˚F to 90 F as the above figure.
˚
TROUBLESHOOTING
Resistance[Ω]
Approximately
50~500
50~500
45~400
Yes
Yes
Go to No 6
Current Oven Temp
No
Unplugged the unit
5
Is the resistance of
thermistor normal?
Check:
Pins 4 and 5 of CN60 and pins 5 and 6 of CN61
in main PCB
Normal- approximately 1.09kΩ at 77˚F(25˚C)
6
Replace the Main PCB
8-12
Replace the
No
defected
Themistor
CN61
CN60
Yes