Samsung RS23 manual 5-9Load Control Circuit, Operation Principles By Parts Of Circuit

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5-9) Load Control Circuit

OPERATION PRINCIPLES BY PARTS OF CIRCUIT

5-9) Load Control Circuit

1)Main PCB processes most of the load control for electronic refrigerators.

2)Compressor, F-Room, defrost heater, and other functions are controlled with relay.

3)For example, to operate compressor, MICOM 29 pin outputs high (5V) signal which goes into IC3 Pin #4. The IC3 pin NO 4 plays the same role as the base of NPN TR. The pin #14 works as collector of TR. So, if 5V is supplied to pin #4 of IC3, the pin #15 turned on and connected to the ground. Then, the relay RY75 and coil connected to the pin #15 of IC3 becomes low (OV) and +12V (opposite side of coil) flows to the pin #15 of IC3 via coil and goes into the ground. While current flows to the coil, the magnetic power arise, it turns on the secondary contact point inside of RY75, and operates when the AC power is supplied to the both side of comp. When MICOM #29 Pin becomes Low(0V), IC3 #4 Pin becomes Low which makes Power cut and current of RY75 RELAY cut. So, secondary contact becomes off due to magnetic field cut, which makes Comp off.

4)All other loads work basically on same principle, defrost heater operates only on the condition that the compressor is turned off like the circuit above, and connected like the equivalent circuit below.

* Q710 is connected to the F door switch to prevent PL accident due to continuous operation of motor when the auger motor control circuit is not working properly. It must be turned off when the door is opened.

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Contents SIDE-BY-SIDEREFRIGERATOR SAMSUNG Home Appliance ServiceModel RS2*3* RS2*2* RS2*1SAMSUNG ELECTRONICS AMERICA, INC IMPORTANT SAFETY NOTICETechnical Service Guide Copyright 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 FreezerMechanical Disassembly Ice Dispenser & Ice MakerAuger Motor Case 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 5-2OSCILLATION CIRCUIT 5-1POWER5. OPERATION PRINCIPLES BY PARTS OF CIRCUIT 5-4EEPROM DETECTION CIRCUIT 5-3RESET CIRCUITOPERATION PRINCIPLES BY PARTS OF 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 CIRCUITGRID WAVE PATTERN OPERATION PRINCIPLES BY PARTS OF CIRCUIT2 DISPLAY OPERATION 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 diagnosticsTEL 82-62-950-6810,6811 FAX ELECTRONICS272, Oseon-Dong, Kwangsan-Gu Kwangju-City,Korea