Samsung RS2544, RS2666, RS2622, RS2777 Eeprom Circuit, Option Circuit, Load Drive Circuit, D602

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Circuit Descriptions

1-3) When the motor rpm is in 600∼700, it will stop automatically and it tries to resume after 10 seconds. If the motor is

not working properly after 5 time trials, it will rest for 10 minutes, then try to resume again. This process will be done continuously.

Note) If there is an abnormal situation for the motor, the self-diagnostics will show the corresponding LED segment.

10-9) EEPROM Circuit

EEPROM is semiconductor memory not to be erased. It can be used in the area of unstable electric power.

10-10) Option Circuit

There are a variety of models that have a different function. A different model can set up to use option circuit as shown.

10-11) Load Drive Circuit

D602

OPTION

XCoolSelect ZoneTM

ONo CoolSelect ZoneTM

1)The control of load in the system is accomplished by the main PCB.

2)Most of relays or SSRs can control the compressor, refrigerator/freezer defrost heater, and several option functions.

3)For the compressor, #18 pin of micro processor signals High (5V). This signal enters #5 pin of IC3 and #14 of output terminal which have base and collector functions of IC3 turns on and connects the GND. Relay 73 will be grounded through #14 of IC. Magnetic field will generate so that the second side of RY73 is activated and 115V is supplied to the compressor. On the other hands, if #18 of micro processor turns Low(0V), #5 of IC3, the current of RY 73 relay, and magnetic field will shut down in sequence. A contact point in secondary side of Relay 73 is off. Finally compressor will stop.

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Contents Model RS2544 RS2622 RS2644 RS2666 RS2777 Important Safety Notice Contents Door Alarm Multi-Flow SystemXtra SpaceTM Xtra FreshTMCover using a screwdriver, and then disconnect To protect refrigerator in movementWith the door closed, remove the upper hinge It does not fall on youNomenclature ModelsCompany Name Product R Refrigerator Label LocationSpecifications Freezer RefrigeratorWarranty information Interior Views and Dimensions Shelves and BinsFreezer RefrigeratorDimensions of Refrigerator Inches Refrigeration Cycle and Cool Air Circulation Route Refrigerant Route in Refrigeration cycleFreezer Evaporator Dryer Capillary TubeCool Air Circulation Freezer Refrigerator Mechanical Disassembly Refrigerator DisassemblyFreezer Disassembly PlasticWire Drawer in Freezer······························Control Panel Door HandleBeverage StationTM Door GasketRefrigerator Door Light Switch Refrigerator LightTempered Glass Shelf Plastic Drawers in RefrigeratorWater Filter Upper DuctworkEvaporator Cover in the Refrigerator Evaporator Fan MotorEvaporator in Refrigerator Refrigerator ThermistorCoolSelect ZoneTM Thermistor CoolSelect ZoneTM ThermistorFreezer Door Light Switch Plastic Wire Drawer in FreezerDoor Bin in Freezer Freezer ShelfIce maker is located inside of the ice dispenser assembly Disconnect the ice maker wire connectorAuger Motor Case Unlock the locking tabs to separate the ice maker kitFreezer Light Evaporator Cover in FreezerEvaporator in Freezer Freezer ThermistorAmbient Thermistor Ice-MakerThermistorMachine Compartment ＆ Electric Box Water SolenoidsCondenser Fan Sub-condenserOperation Function Temperature Control Function Digital PanelChild Lock Function Quick Ice and Power Cool FunctionsPower FreezeQuick Ice function CoolSelect ZoneTM Function RS2666,RS2777 Fan Motor Delay Function of the Machine CompartmentIce & Water Dispenser Function Ice-Maker Function Water Filter Indicator FunctionFilter Indicator Preparation of Ice-maker Initial Operation functionJudgement Remark ·MICOM PortWater Supply function Defrost FunctionHeater on Heater OFFDefrost operation Beeps will cease immediately when the doors are closed Self-Diagnostics FunctionSelf-Diagnostics in the initial Power on Sound FunctionError Error items of self-diagnosticsFunction error Error items LED Display Details RemarksRestoration Function for Power Outage This mode, only the display LEDs for temperature will be onLoad Operation Check Function Set Point Shift FunctionShift the freezer temperature sensor Table of Set Point Shift FunctionOperation Function Shift the CoolSelect ZoneTM temperature sensor Shift the Ice maker temperature sensorCircuit Descriptions Source Power Circuit Reset CircuitOscillator Circuit TerminalTemperature Sensing Circuit Door S/W Sensing CircuitMicom ChangeKey Scan and display operation DEF-sensor and Bimetal work in parallelKey Scan and Display Circuit Key Scan CoolSelect ZoneTM Panel Circuit Voltages between high-speed and low-speed Fan Motor Bldc Drive CircuitMotor drive circuit Eeprom Circuit Option CircuitLoad Drive Circuit D602COMP. equivalence circuit of drive section Diagnostics If power is not onStart NormalAssembly If the compressor and cooling fan motor don’t work normallyCheck after a lapse of 5 min ConnectionPerform forced defrosting for F Room at a time If defrost functionExchange and troubleshoot Corresponding sensor If the temperature sensor of F and R room has trouble If there is a trouble with self-diagnosisIf the ambient sensor has trouble Start Check if the iced solder of main PCB is ShortIf alarm sound If Ding-Dong sounds continuously StartIf Beep sounds continuously Start Remove causes afterDisplay’ Without sound of buzzer operation StartMain PCB is normal buzzer normal If the panel PCB is not working normally ZoneTM panelIf fan doesn’t work Reference Connections of door S/WDoor open DC Door closeIf CoolSelect ZoneTM isn’t operated normally RS2555, RS2577 If the lamp of CoolSelect ZoneTM is not lit StartIf the Panel PCB key isn’t selected Panel PCB has trouble for itselfIf the lamps of freezer / refrigerator does not light Is the inside lamp filament cut?Check the operation of SSR71 and Q701 If Crushed Ice/Cubed Ice doesn’t work properly Safety Instructions on Service Appendix ⅠReference for circuit diagnostics DC 0V Stop ConditionResistance value ∼DC 12V load working conditionFor safety, you must turn the power off Load Value ContentsRef Check a load Ref. Def heaterRef Check Door S/W Lamp Lamp on the REF878 834791 749Ref Service part lists of each circuit board Part Name Specifcation ’TYPage Page Electronics Refrigerator Division 2003 Code DA82-00001D