Samsung RS2622, RS2544, RS2666 Source Power Circuit, Oscillator Circuit, Terminal, Reset Circuit

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Circuit Descriptions

10-1) Source Power Circuit

This circuit shows SMPS(Switch Mode Power Supply) which converts AC input voltage (115V, 60Hz) to a high DC voltage (170V). The input AC source power is converted to DC through a wave rectifier (BD1) and the converted DC power will generate a constant waveform on the switching transformer using a high speed (100KHz) switching motion of TOP223Y. The D104 will rectify the generated voltage and transform into a steady 12V DC source power used for the digital display panel and relays. The regulator (KA7805) finally transforms into 5V DC source power for the control board and sensor’s circuits.

Caution) Be careful to handle this circuit due to high voltages (AC115V, DC170V)

10-2) Oscillator Circuit
Terminal	Oscillation Frequency
Xin(#30)	4MHz
Xout(#31)	4MHz

This is oscillator circuit to generate synchronous clocks used to calculate the time for the microprocessor operation.

Note) If the specification of a resonator changes, micro-processor can not work properly.

10-3) Reset Circuit
Terminal	Voltage
Vcc	DC 5V
RESET	DC 5V

The reset circuit is to initialize the values RAM ＆ other sectors of micro-processor. When the power is engaged initially, the reset voltage becomes “Low,” and it keeps “High” in the normal operation.

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Contents Model RS2544 RS2622 RS2644 RS2666 RS2777 Important Safety Notice Contents Xtra SpaceTM Door AlarmMulti-Flow System Xtra FreshTMWith the door closed, remove the upper hinge Cover using a screwdriver, and then disconnectTo protect refrigerator in movement It does not fall on youCompany Name NomenclatureModels Product R Refrigerator Label LocationSpecifications Freezer RefrigeratorWarranty information Freezer Interior Views and DimensionsShelves and Bins RefrigeratorDimensions of Refrigerator Inches Freezer Evaporator Dryer Refrigeration Cycle and Cool Air Circulation RouteRefrigerant Route in Refrigeration cycle Capillary TubeCool Air Circulation Freezer Refrigerator Freezer Disassembly Mechanical DisassemblyRefrigerator Disassembly PlasticWire Drawer in Freezer······························Beverage StationTM Control PanelDoor Handle Door GasketTempered Glass Shelf Refrigerator Door Light SwitchRefrigerator Light Plastic Drawers in RefrigeratorEvaporator Cover in the Refrigerator Water FilterUpper Ductwork Evaporator Fan MotorCoolSelect ZoneTM Thermistor Evaporator in RefrigeratorRefrigerator Thermistor CoolSelect ZoneTM ThermistorDoor Bin in Freezer Freezer Door Light SwitchPlastic Wire Drawer in Freezer Freezer ShelfAuger Motor Case Ice maker is located inside of the ice dispenser assemblyDisconnect the ice maker wire connector Unlock the locking tabs to separate the ice maker kitFreezer Light Evaporator Cover in FreezerAmbient Thermistor Evaporator in FreezerFreezer Thermistor Ice-MakerThermistorCondenser Fan Machine Compartment ＆ Electric BoxWater Solenoids 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 Judgement Remark Preparation of Ice-makerInitial Operation function ·MICOM PortHeater on Water Supply functionDefrost Function Heater OFFDefrost operation Self-Diagnostics in the initial Power on Beeps will cease immediately when the doors are closedSelf-Diagnostics Function Sound FunctionFunction error ErrorError items of self-diagnostics Error items LED Display Details RemarksLoad Operation Check Function Restoration Function for Power OutageThis mode, only the display LEDs for temperature will be on 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 Oscillator Circuit Source Power CircuitReset Circuit TerminalMicom Temperature Sensing CircuitDoor S/W Sensing Circuit 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 Load Drive Circuit Eeprom CircuitOption Circuit D602COMP. equivalence circuit of drive section Start DiagnosticsIf power is not on NormalCheck after a lapse of 5 min AssemblyIf the compressor and cooling fan motor don’t work normally ConnectionPerform forced defrosting for F Room at a time If defrost functionExchange and troubleshoot Corresponding sensor If the ambient sensor has trouble Start If the temperature sensor of F and R room has troubleIf there is a trouble with self-diagnosis Check if the iced solder of main PCB is ShortIf Beep sounds continuously Start If alarm soundIf Ding-Dong 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 panelDoor open DC If fan doesn’t work ReferenceConnections of door S/W Door closeIf the Panel PCB key isn’t selected If CoolSelect ZoneTM isn’t operated normally RS2555, RS2577If the lamp of CoolSelect ZoneTM is not lit Start 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 Resistance value Appendix ⅠReference for circuit diagnosticsDC 0V Stop Condition ∼DC 12V load working conditionRef Check a load For safety, you must turn the power off LoadValue Contents Ref. Def heaterRef Check Door S/W Lamp Lamp on the REF791 878834 749Ref Service part lists of each circuit board Part Name Specifcation ’TYPage Page Electronics Refrigerator Division 2003 Code DA82-00001D