LG LFX25960ST Service Manual page 37

3. Open Door Detection Circuit Check
Measurement
Location
Freezer/
Refrigerator Door
Closed
Open
8-2-3 Temperature Sensor Circuit
TEMPERATURE
- 20 ˚C (-4 °F)
- 15 ˚C (5 °F)
- 10 ˚C (14 °F)
- 5 ˚C (23 °F)
0 ˚C (32 °F)
+ 5 ˚C (41 °F)
+ 10 ˚C (50 °F)
+ 15 ˚C (59 °F)
+ 20 ˚C (68 °F)
+ 25 ˚C (77 °F)
+ 30 ˚C (86 °F)
+ 40 ˚C (104 °F)
+ 50 ˚C (122 °F)
• The resistance of the SENSOR has a ±5% common difference.
• Measure the resistance of the SENSOR after leaving it for over 3 minutes in the measuring temperature.
This delay is necessary due to sensor response speed.
Pin 4 & 5 of con4 Ref.Door
Pin 5 & 6 of con5 Fre.Door
RESISTANCE OF FREEZER/Icing
SENSOR
22.3 KΩ
16.9 KΩ
13.0 KΩ
10.1 KΩ
7.8 KΩ
6.2 KΩ
4.9 KΩ
3.9 KΩ
3.1 KΩ
2.5 KΩ
2.0 KΩ
1.4 KΩ
0.8 KΩ
- 37 -
0 V
5 V
RESISTANCE OF REFRIGERATOR &
DEFROST SENSOR & ROOM SENSOR
77 KΩ
60 KΩ
47.3 KΩ
38.4 KΩ
30 KΩ
24.1 KΩ
19.5 KΩ
15.9 KΩ
13 KΩ
11 KΩ
8.9 KΩ
6.2 KΩ
4.3 KΩ