LG LRFC25750ST, Service Manual

Page: 29 / 44

8-2-5 Temperature Sensor Circuit
The upper CIRCUIT reads REFRIGERATOR temperature, FREEZER Temperature, and DEFROST-SENSOR temperature
for defrosting and the indoor temperature for compensating for the surrounding temperature into MICOM.
OPENING or SHORT state of each TEMPERATURE SENSOR are as follows:
8-2-6 Refrigeration Compartment Stepping Motor Damper Circuit
* The circuit shown below is the damper circuit to regulate the refrigerator temperature.
- 29 -
SENSOR CHECK POINT NORMAL (-30°C ~ 50°C) SHORT-CIRCUITED OPEN
Freezer Sensor POINT Voltage
Refrigerator Sensor POINT Voltage
0.5 V ~ 4.5 V 0 V 5 V
Defrosting Sensor POINT Voltage
Room Temperature sensor POINT Voltage
A
B
C
D