Samsung RS23 manual 5-6TEMP SENSING CIRCUIT, Operation Principles By Parts Of Circuit

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OPERATION PRINCIPLES BY PARTS OF CIRCUIT

5-6) TEMP SENSING CIRCUIT

1)Sensor uses a thermistor which has a temp coefficient of negative resistance and controls resistance. When the heat goes up, the resistance gets down and vice versa. R302, 4, 6, 9 and C301~C303, C305 are parts for noise prevention but they are not related to temp sensing characteristics.

2)If Vf is the incoming voltage to MICOM in case of F-Sensor, Vf equals (Rth * Vcc)/ ((R301 + Rth). Where Rth is resistance of THERMISTOR corresponding to Temp. Please refer to the Appendix Temp-to-Sensor Resistance/Voltage conversion table(Temp-to-MICOM Terminal Voltage included) on A/S. (Next page)

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Contents SIDE-BY-SIDEREFRIGERATOR SAMSUNG Home Appliance ServiceModel RS2*3* RS2*2* RS2*1Technical Service Guide Copyright IMPORTANT SAFETY NOTICESAMSUNG ELECTRONICS AMERICA, INC Contents 1. Safety Instructions on Service One 1 Year Parts and Labor on Refrigerator 2. Warranty informationSAMSUNG REFRIGERATOR LIMITED WARRANTY TO ORIGINAL PURCHASER3-3Machine Compartment Disassembly 3. Mechanical Disassembly3-1Refrigerator Disassembly 3-2Freezer DisassemblyDoor Gasket Refrigerator Door Light SwitchControl Panel Door HandleGallon Door Bin Mechanical DisassemblyRefrigerator Light Tempered Glass ShelfMechanical Disassembly Damper in the RefrigeratorRefrigerator Thermistor Twin cool in the RefrigeratorFreezer Shelf Freezer Door Light SwitchPlastic Wire Drawer in Freezer Door Bin in FreezerAuger Motor Case Ice Dispenser & Ice MakerMechanical Disassembly Mechanical Disassembly Freezer LightEvaporator Fan Motor Evaporator Cover in FreezerMechanical Disassembly Evaporator in FreezerIce-MakerThermistor Freezer ThermistorCondenser Machine Compartment ＆ Electric BoxWater Solenoids Condenser Fan4. CIRCUIT DIAGRAM 5. OPERATION PRINCIPLES BY PARTS OF CIRCUIT 5-1POWER5-2OSCILLATION CIRCUIT OPERATION PRINCIPLES BY PARTS OF CIRCUIT 5-3RESET CIRCUIT5-4EEPROM DETECTION CIRCUIT Door 5-5DOOR SWITCH DETECTON CIRCUITOPERATION PRINCIPLES BY PARTS OF CIRCUIT CategoryOPERATION PRINCIPLES BY PARTS OF CIRCUIT 5-6TEMP SENSING CIRCUITTemp OPERATION PRINCIPLES BY PARTS OF CIRCUITTemp to Resistance of Sensor & MICOM PORT Voltage Sensor CHIP PX41C Standard1 KEY SCAN 5-7DAMPER CIRCUIT5-8DISPLAY Circuit OPERATION PRINCIPLES BY PARTS OF CIRCUIT2 DISPLAY OPERATION OPERATION PRINCIPLES BY PARTS OF CIRCUITGRID WAVE PATTERN OPERATION PRINCIPLES BY PARTS OF CIRCUIT 5-9Load Control CircuitOPERATION PRINCIPLES BY PARTS OF CIRCUIT 5-10ICE MAKER OPERATION CIRCUITOPERATION PRINCIPLES BY PARTS OF CIRCUIT 5-11OPTION Circuit6-1Freezer 6. Illustrated Parts Catalog6-2Refrigerator Illustrated Parts Catalog6-3Cabinet Illustrated Parts CatalogIllustrated Parts Catalog 6-4Disassembly of Freeze DoorIllustrated Parts Catalog 6-5Disassembly of Refrigerator DoorDEFECTS Appendix ⅠReference for circuit diagnosticsRef.1 Measure Load Terminals LOADRef.2 Check SENSOR Appendix ⅠReference for circuit diagnostics272, Oseon-Dong, Kwangsan-Gu Kwangju-City,Korea ELECTRONICSTEL 82-62-950-6810,6811 FAX