LG LRV650TT Service Manual page 20

MICOM FUNCTION AND CIRCUIT DIAGRAM
5-2-6. Switch Input Circuit
Input Circuit is to sense a TEST-S/W signal for refrigerator inspection.
5-2-7. Temperature Sensing Circuit
This circuit consists of top/bottom sensor, top EVA/bottom EVA sensor for controlling top/bottom parts' storage/maturing
temperature, and an exterior temperature sensor. Each sensor's SHORT and OPEN condition is as followed.
Sensor
Exterior Sensor POINT A Voltage
Top Sensor POINT B Voltage
Bottom Sensor POINT E Voltage
Top EVA Sensor POINT C Voltage
Bottom EVA Sensor POINT D Voltage
P11
20
Check Point Normal (-30
R18
℃ ℃ ~50 ℃ ℃ )
0.5 V~4.5 V
- 20 -
SHORT OPEN
0 V 5 V