LG LRBP1031W Service Manual page 24

5) TEMP SENSOR CIRCUITS
The above circuit reads the surrounding temperature, DEFROSTING temperature and FREEZER ROOM temperature into
MICOM(IC1). OPEN or SHORT state of each SENSOR is as follows.
SENSOR
ROOM TEMPERATURE
SENSOR
DEFROST SENSOR
FREEZER SENSOR
6) SWITCH INPUT CIRCUIT
The following circuit is a test switch input circuit for checking the refrigerator.
CHECK POINT NORMAL (-30¡C~50¡C)
POINT A Voltage
POINT B Voltage
POINT C Voltage
0.5V ~ 4.5V
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(RTÐ SENSOR)
(DEFROST SENSOR)
(FREEZER COMPARTMENT
SENSOR)
SHORT
0V
OPEN
5V