DEF-sensor and Bimetal work in parallel

Circuit Descriptions

Note)

1) F-DEF-sensor and Bimetal work in parallel.

2) At the first power on, an open error (5V input to MICOM) can be detected by self-diagnostics. A short error will be ignored.

3) In self-diagnostics during a normal operation, only an open error can be detected.

4) The F-DEF heater will be off at the set temperature after the bimetal is off.

10-6) Key Scan and Display Circuit

Power Freeze

Freezer Temp.

Ice Type

Power Cool

Fridge Temp.

Child Lock

1) Key Scan and display operation.

The model uses a decorder IC which 4 inputs and 9 outputs. If the IC 9 decorder (TC4028BP) receivesd signals from MICOM pins (3∼6), an output signal per 2 miliseconds comes out from Q3, Q41, Q8, Q6, Q9, Q7, Q0, Q2, and Q4 pin in sequence. This signal enters to a driver IC input terminal of the CoolSelect ZoneTM PCB and IC5 (TD 62783AP), then approximate 11V peaks will generate from an output terminal as shown on the next page.

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Samsung RS2544 manual DEF-sensor and Bimetal work in parallel, Key Scan and Display Circuit, Key Scan and display operation

Contents

Model RS2544 RS2622 RS2644 RS2666 RS2777 Important Safety Notice Contents Door Alarm Multi-Flow SystemXtra SpaceTM Xtra FreshTM Cover using a screwdriver, and then disconnect To protect refrigerator in movementWith the door closed, remove the upper hinge It does not fall on you Nomenclature ModelsCompany Name Product R Refrigerator Label Location Specifications Freezer Refrigerator Warranty information Interior Views and Dimensions Shelves and BinsFreezer Refrigerator Dimensions of Refrigerator Inches Refrigeration Cycle and Cool Air Circulation Route Refrigerant Route in Refrigeration cycleFreezer Evaporator Dryer Capillary Tube Cool Air Circulation Freezer Refrigerator Mechanical Disassembly Refrigerator DisassemblyFreezer Disassembly PlasticWire Drawer in Freezer······························ Control Panel Door HandleBeverage StationTM Door Gasket Refrigerator Door Light Switch Refrigerator LightTempered Glass Shelf Plastic Drawers in Refrigerator Water Filter Upper DuctworkEvaporator Cover in the Refrigerator Evaporator Fan Motor Evaporator in Refrigerator Refrigerator ThermistorCoolSelect ZoneTM Thermistor CoolSelect ZoneTM Thermistor Freezer Door Light Switch Plastic Wire Drawer in FreezerDoor Bin in Freezer Freezer Shelf Ice 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 kit Freezer Light Evaporator Cover in Freezer Evaporator in Freezer Freezer ThermistorAmbient Thermistor Ice-MakerThermistor Machine Compartment ＆ Electric Box Water SolenoidsCondenser Fan Sub-condenser Operation Function Temperature Control Function Digital Panel Power FreezeQuick Ice function Quick Ice and Power Cool FunctionsChild Lock Function Ice & Water Dispenser Function Fan Motor Delay Function of the Machine CompartmentCoolSelect ZoneTM Function RS2666,RS2777 Filter Indicator Water Filter Indicator FunctionIce-Maker Function Preparation of Ice-maker Initial Operation functionJudgement Remark ·MICOM Port Water Supply function Defrost FunctionHeater on Heater OFF Defrost operation Beeps will cease immediately when the doors are closed Self-Diagnostics FunctionSelf-Diagnostics in the initial Power on Sound Function Error Error items of self-diagnosticsFunction error Error items LED Display Details Remarks Restoration Function for Power Outage This mode, only the display LEDs for temperature will be onLoad Operation Check Function Set Point Shift Function Shift the freezer temperature sensor Table of Set Point Shift Function Operation Function Shift the CoolSelect ZoneTM temperature sensor Shift the Ice maker temperature sensor Circuit Descriptions Source Power Circuit Reset CircuitOscillator Circuit Terminal Temperature Sensing Circuit Door S/W Sensing CircuitMicom Change Key Scan and Display Circuit DEF-sensor and Bimetal work in parallelKey Scan and display operation Key Scan CoolSelect ZoneTM Panel Circuit Motor drive circuit Fan Motor Bldc Drive CircuitVoltages between high-speed and low-speed Eeprom Circuit Option CircuitLoad Drive Circuit D602 COMP. equivalence circuit of drive section Diagnostics If power is not onStart Normal Assembly If the compressor and cooling fan motor don’t work normallyCheck after a lapse of 5 min Connection Exchange and troubleshoot Corresponding sensor If defrost functionPerform forced defrosting for F Room at a time 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 Short If alarm sound If Ding-Dong sounds continuously StartIf Beep sounds continuously Start Remove causes after Main PCB is normal buzzer normal Without sound of buzzer operation StartDisplay’ If the panel PCB is not working normally ZoneTM panel If fan doesn’t work Reference Connections of door S/WDoor open DC Door close If 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 itself If 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 condition For safety, you must turn the power off Load Value ContentsRef Check a load Ref. Def heater Ref Check Door S/W Lamp Lamp on the REF 878 834791 749 Ref Service part lists of each circuit board Part Name Specifcation ’TYPage Page Electronics Refrigerator Division 2003 Code DA82-00001D

Samsung RS2544, RS2666 manual DEF-sensor and Bimetal work in parallel, Key Scan and Display Circuit

Models: RS2777 RS2622 RS2666 RS2544

Circuit Descriptions

1) F-DEF-sensor and Bimetal work in parallel.

10-6) Key Scan and Display Circuit

1) Key Scan and display operation.