Samsung RS2777, RS2544 Without sound of buzzer operation Start, Main PCB is normal buzzer normal

Page 51

Diagnostics

3) Without sound of buzzer operation

Start

Refer the description of Test function in the manual for the Forced operation.

Does it sound ‘Ding-Dong’if you press a button

on front panel?

Doesitmakeasoundof‘door-open’alarm whenyouareopening thedooroffreezerorfridge morethan2min?

Is the bent or go-out of the buzzer

in the main PCB?

Are signals coming

out of MICOM No. 21 in a 1-sec cycle

after the Forced operation?

YES

Is signal of Q801

Base ouputted with 1 sec. intervals in the condition above?

YES

Did lead of a

component fall on the vibration plate

of buzzer?

The main PCB and buzzer are normal

YES

Main PCB is normal; buzzer normal.

YES

	Check the panel PCB with the
	reference of ‘how to check panel
YES	display’.



	Buzzer is broken – replace it.
NO
NO



	Replace the main PCB.
	(failure of MICOM)
NO
NO



	Check the state of pattern connection
	between MICOM No.21 and Q801.
YES	(Check Open/Short)



	Poor buzzer is broken down or
	replace the buzzer.

Image 51

Contents Model RS2544 RS2622 RS2644 RS2666 RS2777 Important Safety Notice Contents Xtra FreshTM Door AlarmMulti-Flow System Xtra SpaceTMIt does not fall on you Cover using a screwdriver, and then disconnectTo protect refrigerator in movement With the door closed, remove the upper hingeProduct R Refrigerator Label Location NomenclatureModels Company NameFreezer Refrigerator SpecificationsWarranty information Refrigerator Interior Views and DimensionsShelves and Bins FreezerDimensions of Refrigerator Inches Capillary Tube Refrigeration Cycle and Cool Air Circulation RouteRefrigerant Route in Refrigeration cycle Freezer Evaporator DryerCool Air Circulation Freezer Refrigerator PlasticWire Drawer in Freezer······························ Mechanical DisassemblyRefrigerator Disassembly Freezer DisassemblyDoor Gasket Control PanelDoor Handle Beverage StationTMPlastic Drawers in Refrigerator Refrigerator Door Light SwitchRefrigerator Light Tempered Glass ShelfEvaporator Fan Motor Water FilterUpper Ductwork Evaporator Cover in the RefrigeratorCoolSelect ZoneTM Thermistor Evaporator in RefrigeratorRefrigerator Thermistor CoolSelect ZoneTM ThermistorFreezer Shelf Freezer Door Light SwitchPlastic Wire Drawer in Freezer Door Bin in FreezerUnlock the locking tabs to separate the ice maker kit Ice maker is located inside of the ice dispenser assemblyDisconnect the ice maker wire connector Auger Motor CaseEvaporator Cover in Freezer Freezer LightIce-MakerThermistor Evaporator in FreezerFreezer Thermistor Ambient ThermistorSub-condenser Machine Compartment ＆ Electric BoxWater Solenoids Condenser FanOperation Function Digital Panel Temperature Control FunctionQuick Ice and Power Cool Functions Power FreezeQuick Ice functionChild Lock Function Fan Motor Delay Function of the Machine Compartment Ice & Water Dispenser FunctionCoolSelect ZoneTM Function RS2666,RS2777 Water Filter Indicator Function Filter IndicatorIce-Maker Function ·MICOM Port Preparation of Ice-makerInitial Operation function Judgement RemarkHeater OFF Water Supply functionDefrost Function Heater onDefrost operation Sound Function Beeps will cease immediately when the doors are closedSelf-Diagnostics Function Self-Diagnostics in the initial Power onError items LED Display Details Remarks ErrorError items of self-diagnostics Function errorSet Point Shift Function Restoration Function for Power OutageThis mode, only the display LEDs for temperature will be on Load Operation Check FunctionTable of Set Point Shift Function Shift the freezer temperature sensorOperation Function Shift the Ice maker temperature sensor Shift the CoolSelect ZoneTM temperature sensorCircuit Descriptions Terminal Source Power CircuitReset Circuit Oscillator CircuitChange Temperature Sensing CircuitDoor S/W Sensing Circuit MicomDEF-sensor and Bimetal work in parallel Key Scan and Display CircuitKey Scan and display operation Key Scan CoolSelect ZoneTM Panel Circuit Fan Motor Bldc Drive Circuit Motor drive circuitVoltages between high-speed and low-speed D602 Eeprom CircuitOption Circuit Load Drive CircuitCOMP. equivalence circuit of drive section Normal DiagnosticsIf power is not on StartConnection AssemblyIf the compressor and cooling fan motor don’t work normally Check after a lapse of 5 minIf defrost function Exchange and troubleshoot Corresponding sensorPerform forced defrosting for F Room at a time Check if the iced solder of main PCB is Short If the temperature sensor of F and R room has troubleIf there is a trouble with self-diagnosis If the ambient sensor has trouble StartRemove causes after If alarm soundIf Ding-Dong sounds continuously Start If Beep sounds continuously StartWithout sound of buzzer operation Start Main PCB is normal buzzer normalDisplay’ ZoneTM panel If the panel PCB is not working normallyDoor close If fan doesn’t work ReferenceConnections of door S/W Door open DCPanel PCB has trouble for itself If CoolSelect ZoneTM isn’t operated normally RS2555, RS2577If the lamp of CoolSelect ZoneTM is not lit Start If the Panel PCB key isn’t selectedIs the inside lamp filament cut? If the lamps of freezer / refrigerator does not lightCheck the operation of SSR71 and Q701 If Crushed Ice/Cubed Ice doesn’t work properly Safety Instructions on Service ∼DC 12V load working condition Appendix ⅠReference for circuit diagnosticsDC 0V Stop Condition Resistance valueRef. Def heater For safety, you must turn the power off LoadValue Contents Ref Check a loadLamp Lamp on the REF Ref Check Door S/W749 878834 791Part Name Specifcation ’TY Ref Service part lists of each circuit boardPage Page Refrigerator Division 2003 Code DA82-00001D Electronics

Diagnostics

3) Without sound of buzzer operation

Start

on front panel?

Main PCB is normal; buzzer normal.

display’.