LG LRSC26980TT Service Manual - Page 37
Temperature sensing circuit
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EXPLANATION FOR MICOM CIRCUIT 1-7. Temperature sensing circuit LRSC269**** ROOM-SENSOR WATER TANK -SENSOR FRZ-SENSOR DEFROSTSENSOR REF-UPPERSENSOR REF-LOWERSENSOR OPTICHILLSENSOR The circuits involving the freezer and refrigerator sensors control the temperature in both the freezer and the refrigerator. The Icemaker sensor detects when ice is made. The defrost sensor determines both the need for defrosting and the efficiency of the defrost operation. See the table below for voltages and checkpoints. SENSOR Freezing sensor Defrost sensor Refrigerator sensor 1 Refrigerator sensor 2 Room temperature sensor Water tank sensor Optichill sensor CHECK POINT POINT A Voltage POINT B Voltage POINT C Voltage POINT D Voltage POINT E Voltage POINT F Voltage POINT G Voltage NORMAL(-30 °C ~ 50 °C) IN SHORT IN OPEN 0.5 V~4.5 V 0 V 5 V - 37 -
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