LG LSC27990TT Service Manual page 35

EXPLANATION FOR MICOM CIRCUIT
2) Sensor resistance characteristics table
Refrigerator sensor 1&2
Measuring Temperature (°C) Freezing Sensor
Defrost sensor, Ambient sensor
-20 °C 22.3 k_-_ 77 k_-:'
-15 °C 16.9 k_-_ 60 k_-:'
-15 °C 13.0 k_-_ 47.3 k_-:'
-5 °C 10.1 k_-_ 38.4 k_-:'
0 °C 7.8 k_-:' 30 k_-:'
+5 °C 6.2 k_-:' 24.1 k_-:'
+10 °C 4.9 k_-:' 19.5 k_-:'
+15 °C 3.9 k_-:' 15.9 k_-:'
+20 °C 3.1 k_-:' 13 k_-:'
+25 °C 2.5 k_-:' 11 k_-_
+30 °C 2.0 k_-:' 8.9 k_-:'
+40 °C 1.4 k_-:' 6.2 k_-:'
+50 °C 0.8 kO 4.3 kO
I_ Resistance value allowance of sensor is +5%.
I_ When measuring the resistance value of the sensor, allow the temperature of that sensor to stabilize for at least 3 minutes
before measuring. This delay is necessary because of the sense speed relationship.
I_ Use a digital tester to measure the resistance. An analog tester has to great a margin of error.
I_ Resistance of the cold storage sensor 1 and 2 shall be measured with a digital tester after separating CON8 of the PWB
ASSEMBLY and the MAIN part.
I_ Resistance of the freezing sensor shall be measured with a digital tester after separating CON7 of the PWB ASSEMBLY
and the MAIN part.
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