LG LTCS20220W Service Manual page 29

3. LED Power Circuit (LV)
Circuit Pin Number
LED Power Con 6 Pin 10
8-2-3 Temperature Sensor Circuit (Refer to figure 2)
Voltage supplied to each sensor wil range between 0.5 volts -22°F(-30°C) and 4.5 volts 122°F(50°C) depending upon the
temperature in the compartments. A measurement of 0 volts indicates a short in the sensor circuit. A measurement of 5
volts indicates an open in the sensor circuit.
PIN 1 2
N/C N/C
To measure the outputs of the sensors, check the voltages between the pins as in the table. And refer the values in the section
"RESISTANCE SPECIFICATION OF SENSOR"
Output
Pin Number
Voltage
Con 6 Pin 11 12 VDC
FIGURE 2
CONNECTOR 7
3 4 5 6
D-SNR R-SNR
SENSOR Pin Number Pin Number
D-SNR Con 7 Pin 3
R-SNR Con 7 Pin 5
RT-SNR Con 8 Pin 1
CONNECTOR 6
PIN 1 2 3 4
DISPLAY
7 8 PIN
N/C N/C
Con 7 Pin 4
Con 7 Pin 6
Con 8 Pin 2
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5 6 7 8 9 10
12V
CONNECTOR 8
1 2 3
RT-SNR R-DOOR S/W
11
GND
4