10-5) Temperature Sensing Circuit - Samsung RB2044SL Service Manual

Circuit Descriptions

10-5) Temperature Sensing Circuit

1) The sensor uses the characteristics of thermistor. If temperature goes higher, resistance goes
lower. On the contrary, if temperature goes lower, resistance goes higher.
2) A MICOM input voltage is calculated by sensor as follows.
R
TH
V = X Vcc
F
R + R
TH 301
3) For the resistance data corresponding to a temperature and a MICOM input voltage, please
refer the conversion table on the back.
( Air Sensor)
When Sensor is open
MICOM input "HIGH"
(V : 5V, R : Sensor reisitance)
CC TH
29
When sensor is cut off
MICOM input "LOW"