LG TD-C7014 series Service Manual page 26

11 DIAGOSTIC TEST
Test 6 Thermistor check
Trouble Symptom : Poor drying performance (over-drying or no drying). Abnormal
Measurement condition : Power cord is unplugged.
GN1(RD4) GN4(WH4)
4 3
1 2
Dryer
Temperature
TH-Heater
10°C
20~30°C 250~180kΩ
30~40°C 180~113kΩ
thermistor operation.
With CN1(RED4), CN4(WH4)disconnected
from Controller, check
TH-Heater
CN4
data according to surrounding
temperature?
4 3
1 2
TH-Drum
CN1
data according to surrounding
temperature?
• When measuring "TH-Heater"
Thermistor, they range Table
data ?
• When measuring "TH-Drum"
Thermistor, they range Table
data ?
• Check Harness
Resistance
TH-Drum
19~111kΩ
11~8kΩ
8~5kΩ
- CN4 resistance ranges table
- CN1 resistance ranges table
NO
YES
YES
Resistance
Dryer
Temperature
TH1
40~50°C 113~75kΩ
50~60°C 75~50kΩ
60°C 50kΩ
2 6
YES
• Check and replace
Controller
NO
• Replace "TH-Heater"
Thermistor
NO
• Replace "TH-Drum"
Thermistor
Remark
TH2
5~4kΩ
4~2.5kΩ
2.5kΩ