LG GR-J303TS Service Manual - Page 18
Temperature Sensing Circuit
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3-2-6. TEMPERATURE SENSING CIRCUIT (LED:6871JB1400, LCD:6871JB1399) Above circuits consist of the upper sensor, middle sensor, lower sensor for adjusting setup temperature at the upper, middle and lower compartment, the ambient temperature sensor to detect ambient air temperature, the upper defrost sensor and the middle defrost sensor attached to the evaporator at the upper, middle compartment to detect the defrost return temperature. Status in short or open are as follows: Sensor Check points Normal (-30 °C ~ 50 °C) Ambient temp. Sensor Upper Sensor Middle Sensor Lower Sensor Upper Defrost Sensor Middle Defrost Sensor POINT Voltage POINT Voltage POINT Voltage POINT Voltage POINT Voltage POINT Voltage 0.5V ~ 4.5V In Short 0V In Open 5V - 18 -
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