LG GA-B409U QA Series

-25-
5) TEMP SENSOR CIRCUITS
6) SWITCH INPUT CIRCUIT
The following circuit is a test switch input circuit for checki ng the refrigerator.
A
B
C
SENSOR CHECK POINT NORMAL (-30°C~50°C) SHORT OPEN
ROOM TEMPERATUR E POINT Voltage
SENSOR
DEFROST SENSOR POINT Voltage 0.5V ~ 4.5V 0V 5V
FREEZER SENSOR POINT
Voltage
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.
C
7
7
8
8
28.2KF
28.2KF
16.2KF
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