LG SxS LRSPC2661T Service Manual
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LG SxS LRSPC2661T Service Manual

LG SxS LRSPC2661T Service Manual

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Download this manual See also: Owner's Manual, User Manual
REFRIGERATOR
SERVICE MANUAL
CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS BOOK
BEFORE SERVICING OR OPERATING THE REFRIGERATOR.
Ref. No.
GR-D267DTU
MODEL: LRSPC2661T
http://biz.lgservice.com
COLOR: TITANIUM

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  • Page 1 http://biz.lgservice.com REFRIGERATOR SERVICE MANUAL CAUTION PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS BOOK BEFORE SERVICING OR OPERATING THE REFRIGERATOR. Ref. No. GR-D267DTU MODEL: LRSPC2661T COLOR: TITANIUM...

  • Page 2: Table Of Contents

    CONTENTS WARNINGS AND PRECAUTIONS FOR SAFETY ........................ 3 SPECIFICATIONS................................... 4 PARTS IDENTIFICATION ............................... 5 HOW TO INSTALL THE REFRIGERATOR ..........................6 HOW TO ADJUST DOOR HEIGHT OF THE REFRIGERATOR ..................6 HOW TO INSTALL WATER PIPE............................7 HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO THE ICEMAKER ............8 COOLING CYCLE AND REFRIGERANT..........................

  • Page 3: Warnings And Precautions For Safety

    WARNINGS AND PRECAUTIONS FOR SAFETY Please observe the following safety precautions in order to 8. Do not fray, damage, machine, heavily bend, yank, or safely and properly use the refrigerator, to avoid hazards, twist the power cord. and prevent accidents during repair. 9.

  • Page 4: Specifications

    SPECIFICATIONS ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS 960(W) 915(D) 1795(H) mm FIRST DEFROST 5 - 6 Hours in.) DEFROST CYCLE 13 - 15 Hours NET WEIGHT 169kg (372 lbs.) DEFROSTING DEVICE Heater, Sheath-AL COOLING SYSTEM Fan Cooling Heater, Sheath-ML TEMPERATURE CONTROL Micom Control Heater, Drain DEFROSTING SYSTEM...

  • Page 5: Parts Identification

    PARTS IDENTIFICATION Reset Switch Management Switch Cover PWB Screen ON/OFF Switch Back Frame Handle Remote Control Display Receiver Camera Dispenser Lamp Monitor Ice & Water Dispenser Button Control Box, R Dairy Product Corner Icemaker Cover, Lamp-R(U) Cantilever Shelf Bank Ice Wine Rack Egg Box Cover, Lamp -F...

  • Page 6: How To Install The Refrigerator

    HOW TO INSTALL REFRIGERATOR 1. How to Adjust Door Height of Refrigerator Make the refrigerator level first. (If the refrigerator is not installed on a level floor, the height of freezer and refrigerator door may not be the same.) 1. If the height of freezer door is lower than the 2.

  • Page 7: How To Install Water Pipe

    HOW TO INSTALL REFRIGERATOR 2. How to Install Water Pipe Install Water Filter (Applicable to some models only) Control box Before Installing water filter 1. Before installing the filter, take out the top shelf of the refrigerator after tilting it to the direction ( ) and lifting it to the direction ( ) and move it to the lower part.

  • Page 8: How To Control The Amount Of Water Supplied To The Icemaker

    HOW TO INSTALL REFRIGERATOR 3. How to Control the Amount of Water Supplied to Icemaker. 3-1. Verify the amount of water supplied to the Icemaker. 1. Pull out the ice bin in the upper part of the freezer compartment. Caution : • Do not put hands or tools into the chute to confirm the operation of geared motor.
  • Page 9 HOW TO INSTALL REFRIGERATOR 3-2. Control the amount of water supplied to the Caution : When adjusting the amount of water supplied, adjust in small increments. Otherwise the water Icemaker. may spill over. Caution : • Unplug the power cord from the wall outlet and wait for more than three minutes before disconnecting PWB cover as 310V is applied in the control panel.

  • Page 10: Cooling Cycle And Refrigerant

    COOLING CYCLE AND REFRIGERANT 1. Cooling Cycle (Cooling Principles/Refrigerant Gas Circulation) 1-1. Principles of cooling cycle Cooling is an operation by which the temperature of a unit is maintained below the ambient temperature. For the cooling operation, there must be an insulated space, the refrigerant (R134a) to absorb heat in the space, and a refrigerant circulation system including a compressor, condenser, evaporator, etc.
  • Page 11 COOLING CYCLE AND REFRIGERANT 2. Description of each component NAME FUNCTION REFRIGERANT (IN AND OUTLET) COMPRESSOR Compresses refrigerant from low(0 kg/cm ) to LOW PRESSURE HIGH PRESSURE high pressure(8-12 kg/cm GAS(0 kg/cm GAS(8-12 kg/cm TEMP(30°C[86°F]) TEMP(80[176°F]- 120°C[248°F]) CONDENSER Refrigerant transforms from high pressure gas HIGH PRESSURE HIGH PRESSURE to high pressure liquid in condenser.

  • Page 12: Functions And Operation Principles Of Main Parts

    FUNCTIONS AND OPERATION PRINCIPLES OF MAIN PARTS 1. Compressor(Reciprocating Type) NOTE : • Over load protector relay detects temperature and current at the same time. It operates when the temperature of compressor is high even there Piston is no current. It shall also operates when over current flows even the temperature of compressor is low.

  • Page 13: Switch (Door, Home Bar, Dispenser)

    FUNCTIONS AND OPERATION PRINCIPLES OF MAIN PARTS 4. Switch(Door, Dispenser) 1. Function 1) Door switches in freezer and refrigerator compartments turns on and off the lamps when the freezer and refrigerator doors are opened and closed. They also switch the fans in the freezer compartment on and off at the same time. 2) Home bar switch turns on and off the lamp in the refrigerator compartment when home bar is open and close.

  • Page 14: Motor

    FUNCTIONS AND OPERATION PRINCIPLES OF MAIN PARTS 5. Motor 6. Solenoid. 1. Freezer/Cooling Motor Used mainly for 1. Structure of Solenoid Freezer/Cooling motor Two types of solenoids are used for refrigerator depending on the applications such as solenoids for ice cube and ice dispenser.

  • Page 15: Heater

    FUNCTIONS AND OPERATION PRINCIPLES OF MAIN PARTS 3. Troubleshooting Symptom Faults(parts) Check Measures Crushed ice comes out when 1. Connector is missed. 1. Check connection parts. 1. Join connector. ice cube is selected. 2. Solenoid for ice cube is cut. 2. Check resistance between 2. Replace parts. terminals.
  • Page 16 FUNCTIONS AND OPERATION PRINCIPLES OF MAIN PARTS 3. Faults Symptom (Products): faulty heater 1) Heater, Sheath-ML/AL Problem Symptom Checks Measures 1. Heater, Sheath heating Poor Defrost 1. The resistance is infinity when it is 1. Replace parts. (Reconnect if wire is cut, corroded, or measured at both connector ends wire is disconnected.) connecting wire is cut.

  • Page 17: Valve

    FUNCTIONS AND OPERATION PRINCIPLES OF MAIN PARTS 3) Other Heaters Corresponding Problem Symptom Checks Measures Heater 1. Heating wire is Heater Plate The temperature of chilled 1. The resistance is infinite when the 1. Replace parts. cut or corroded. (Chilled drawer drawer is high.

  • Page 18: Icemaker And Dispenser Operation Principle And Repair Method

    ICEMAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD 1. Working Principles 1-1. Icemaker Working Principles Power Input Initial Control • Level Icemaker Cube Mould for Initial Control after power is applied. Ice Making Control • Wait until the water in the cube mould is frozen after Icemaker starts operation.
  • Page 19 ICEMAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD 2. Function of Icemaker 2-1. Initial Control Function 1. When power is initially applied or reapplied after power loss, the Icemaker cube mould level is detected after completion of MICOM initialization. The detecting lever moves up and down. 2.
  • Page 20 ICEMAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD 2-4. Ice Ejection Control Function 1. This function ejects the ice from the Icemaker cube mould after ice making is completed. 2. If Hall IC signal is on within 3.6 seconds after ice ejection motor rotates in normal direction, it does not proceed with ice ejection.
  • Page 21 ICEMAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD 2-5 Test Function 1. This function forces operation during operation servicing and cleaning. The test switch is mounted under the automatic Icemaker. The test function starts when the test switch is pressed for more than 0.5 second. 2.
  • Page 22 ICEMAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD 3. Icemaker Troubleshooting * Troubleshooting: it is possible to check the dispenser by pressing freezer and refrigerator temperature control buttons for more than 1 second. (Icemaker is normal if all leds are on): refer to trouble diagnposis function in MICOM section.
  • Page 23 ICEMAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD 4. Icemaker circuit part The Icemaker circuit above applies to the GR-D267 and consists of the Icemaker unit part installed in the freezing section and the Icemaker drive part of the main PWB. Water supply to the Icemaker container is accomplished by opening the valve via a solenoid relay for a duration set by the DIP switches.

  • Page 24: Micom Function

    MICOM FUNCTION 1. Monitor Panel FILTER RESET WATER PUSH 3 SEC. TEMP TEMP ROOM TEMP FILTER STATUS CUBED LOCK CRUSHED UNLOCK 2. Description of Function 2-1. Funnction of Temperature Selection Division Power Initially On 1st Press 2st Press 3th Press 4th Press Setting temperature...
  • Page 25 MICOM FUNCTION 2-2. LCD Back Light Control 1. In order to easily view display status on the LCD, LCD Back Light turns on for a minute in application of initial power, for a minute with button use, and for a minute after closing the door. 2.
  • Page 26 MICOM FUNCTION 2-7. When Icemaker does not operate smoothly Ice is frozen together • When ice is frozen together, take the lumps out of the ice storage bin, break them into small pieces, and then place them into the ice storage bin again. •...
  • Page 27 MICOM FUNCTION 2-11. Control of variable speed freezing room fan 1. To increase cooling speed and load response speed, the MICOM sets freezing room fan motor at the high speed of RPM or the standard RPM. 2. Only at the application of initial power, or special freezing operation, or load response operation does the MICOM direct speed of RPM.
  • Page 28 MICOM FUNCTION 2-16. Frost removal function 1. Frost removal is performed every 7 to 7.5 hours of accumulated compressor operation time. 2. After providing initial power (or after power failure), frost removal starts whenever total operation time of compressor becomes 4 to 4.5 hours. 3.
  • Page 29 MICOM FUNCTION 2-18. Failure Diagnosis Function 1. Failure diagnosis function is a function to facilitate servicing when improper operation of the product occurs. 2. The user will notice a failure when pressing one of the function buttons yields no consequent effect beyond the audible Ding.
  • Page 30 MICOM FUNCTION Note1) In failure of outside sensor, the temperature setting for freezing/ cold storage displays normally and indicated Er is indicated on the outside temperature display part (normally displayed except for the outside temperature display part). Note2) Improper operation of R2 sensor, Icemaker-sensor and Icemaker kit are displayed in LCD check, but not indicated on the failure display part.
  • Page 31 MICOM FUNCTION LCD check function: If simultaneously pressing special freezing button and cold temperature adjustment button for a second, a back light is turns on and all display LCD graphics turn on. On releasing the button, the LCD graphic displays the previous status, and the back light is turns off (LCD graphic and back light ON/OFF check).

  • Page 32: Explanation For Micom Circuit

    EXPLANATION FOR MICOM CIRCUIT 1. Explanation of PWB circuit 1-1. Power circuit Power circuit consists of SMPS (SWITCHING MODE POWER SUPPLY) power. The SMPS consist of the rectifying part (BD1, CE1) converting AC voltage to DC voltage, the switching part (IC2) switching the converted DC voltage, transformer transferring energy of the primary side of the switching terminal to the secondary side and the feedback part (IC3, IC4) transferring control information to the primary side.
  • Page 33 EXPLANATION FOR MICOM CIRCUIT 1-2. Oscillation circuit The oscillation circuit is a circuit with the purpose of generating basic time for clock occurrence for synchronization and time calculation related to information transmission/reception of internal circuitry in IC1 (MICOM). The OSC1 must always use rated parts since If SPEC is changed, time calculated at the IC1 may be changed, and internal operations may cease entirely.
  • Page 34 EXPLANATION FOR MICOM CIRCUIT 1-4. Load/dispenser operation, door opening circuit 1. Load driving circuit Even if opening the door of freezing chamber or cold storage chamber during operation of fan motor at the freezing chamber, this circuit does not stop and operates at the standard RPM. In addition, if doors of freezing chamber or cold storage chamber, the fan motor normally operates at the RPM previously operated.
  • Page 35 EXPLANATION FOR MICOM CIRCUIT 2. Dispenser operation circuit 1) Check load driving status WATER VALVE GEARED SOLENOID SOLENOID HOME BAR SOLENOID Type of Load MOTOR CUBE DISPENSER HEATER PILOT WATER Measuring part IC6-13 IC6-12 IC6-11 IC6-10 IC7-12 IC7-10 IC7-16 Within 1 V Status 12 V 2) Lever S/W sensing circuit...
  • Page 36 EXPLANATION FOR MICOM CIRCUIT 3. Door opening sensing circuit Measuring part IC1 (MICOM) No. 47, 46 Pin Door of Freezing/Cold Storage Room Closing 5 V ( A - B , C - D . SWITCH at both ends are at Off status) Opening 5 V ( A - B , C - D .
  • Page 37 EXPLANATION FOR MICOM CIRCUIT 1-5. Temperature sensing circuit The above circuits are circuits attached to freezing chamber sensor and cold storage room sensors for adjusting temperature settings in the freezing chamber, and cold storage chamber, ice-maker sensor for sensing water temperature in ice-making, or and to an evaporator for sensing temperature of frost removal operations.
  • Page 38 EXPLANATION FOR MICOM CIRCUIT 1-6. Switch entry circuit The following circuits are entry circuits for sensing signal form test Switch, and the electronic single motor damper reed Switch for examining the refrigerator. 1-7. Option designation circuit (model separation function) The above circuits are used for designating separation by model as option and notifying the MICOM. Designation of option by model and the application standards are as follows: u These circuits are accurately pre-adjusted in shipment from factory and so you must not alter the option.
  • Page 39 EXPLANATION FOR MICOM CIRCUIT 1-8. Fan motor driving circuit (freezing chamber, M/C chamber) 1. This circuit performs function to make standby power ‘0’ by cutting off power supplied to ICs inside of the fan motor when the fan motor is OFF. 2.
  • Page 40 EXPLANATION FOR MICOM CIRCUIT 1-9. Temperature compensation and temperature compensation circuit 1. Temperature compensation at freezing chamber, cold storage chamber Temperature compensation at Cold storage chamber Temperature compensation at Freezing chamber Freezing chamber Cold storage chamber Resistance value Temperature Resistance value Temperature Remarks (RCF1)
  • Page 41 EXPLANATION FOR MICOM CIRCUIT u Temperature compensation table at the cold storage room is as follows: Modification resistance 3.3 k 5.6 k 8.2 k 10 k 12 k 18 k 33 k 56 k 180 k Current resistance 0.5 °C 1 °C 1.5 °C 2 °C...
  • Page 42 EXPLANATION FOR MICOM CIRCUIT 2. Compensation circuit for weak-cold, over-cold in freezing chamber Thermal compensation by Jumper CUT JCR1 +1 °C [+1.8 °F] +2 °C [+3.6 °F] JCR2 +1 °C [+1.8 °F] JCR3 -1 °C [-1.8 °F] -2 °C [-3.6 °F] JCR4 -1 °C [-1.8 °F] Compensation...
  • Page 43 EXPLANATION FOR MICOM CIRCUIT 1-10. Communication circuit and connection L/Wire between main PCB and display PCB The following circuit is a communication circuit used for exchanging the necessary information between main MICOM of main PCB and LCD dedicated MICOM for LCD control of display PCB. Transmission/receipt L/Wire is necessary display PCB for driving the display PCB is required.
  • Page 44 EXPLANATION FOR MICOM CIRCUIT 2. Sensor resistance characteristics table Cold storage sensor 1, 2. Measuring Temperature (°C / °F) Freezing Sensor Frost removal sensor, Outside sensor -20 °C [-4 °F] 22.3 k 77 k -15 °C [-5.0 °F] 16.9 k 60 k -15 °C [-5.0 °F] 13.0 k...
  • Page 45 EXPLANATION FOR MICOM CIRCUIT 3. PWB parts diagram and list 3-1. PWB Assembly, main part diagram - 45 -...
  • Page 46 EXPLANATION FOR MICOM CIRCUIT 3-2. Parts list - 46 -...
  • Page 47 EXPLANATION FOR MICOM CIRCUIT WATER SUPPLY S/W - 47 -...
  • Page 48 EXPLANATION FOR MICOM CIRCUIT 3-3. DISPLAY ASSEMBLY part diagram - 48 -...
  • Page 49 EXPLANATION FOR MICOM CIRCUIT 3-4. DISPLAY circuit diagram - 49 -...
  • Page 50 EXPLANATION FOR MICOM CIRCUIT 4. PWB circuit diagram - PWB circuit diagram may vary a little bit depending on actual condition. PWB ASSEMBLY, MAIN - 50 -...
  • Page 51 EXPLANATION FOR MICOM CIRCUIT - 51 -...

  • Page 52: Circuit

    CIRCUIT THE CIRCUIT DRAWINGS - 52 -...

  • Page 53: Problem Diagnosis

    PROBLEM DIAGNOSIS 1. Trouble Shooting CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK * Measuring instrument : 1) No power on outlet. 1. Faulty start Multi tester 2) No power on cord. Bad connection between adapter and outlet. (faulty adapter) Check the voltage.
  • Page 54 PROBLEM DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 2. No cooling. Check the clogged 2) Refrigeration system is clogged. evaporator by heating (as Moisture Residual moisture Air Blowing. Not performed. soon as the cracking sound clogged. in the evaporator. Too short.
  • Page 55 PROBLEM DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 3. Refrigeration 1) Refrigerant Partly leaked. Weld joint leak. is weak. Parts leak. 2) Poor defrosting capacity. Check visually. Drain path (pipe) clogged. Inject P/U into drain hose. Inject through the hole.
  • Page 56 PROBLEM DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 3. Refrigeration Residual Weak heat from heater. Sheath Heater - rated. is weak. frost. Heater plate - rated. Heater cord-L - rated. Bad heater assembly. No contact to drain. Heater plate Loosened stopper cord.
  • Page 57 PROBLEM DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 3. Refrigeration 4) No cooling air circulation. is weak. Faulty fan motor. Fan is Fan shroud contact. - Clearance. constrained. Damping evaporator contact. Accumulated residual frost. Small cooling air Fan overload. - Fan misuse. Insufficient discharge.
  • Page 58 PROBLEM DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 4. Warm 1) Clogged cooling path. refrigerator P/U liquid leak. compartment Foreign materials. –– P/U dump liquid. temperature. 2) Food storate. Store hot food. Store too much at once. Door open. Packages block air flow.
  • Page 59 PROBLEM DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 6. Condensation 4) Dew on door. and ice Dew on the duct door. - Duct door heater is cut. formation. Dew on the dispense Recess Heater is cut. recess. Duct door is open. / Foreign material clogging. Dew on the Not fully filled.
  • Page 60 PROBLEM DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 7. Sounds 1) Compressor compartment operating sounds. Transformer sound. Its own fault. –– Core gap. Bad connection. –– Correct screw connection. Drip tray vibration sound. Bad assembly. Distortion. Foreign materials inside. Back cover machine sound.
  • Page 61 PROBLEM DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 8. Faulty lamp 1) Lamp problem. Filament blows out. (freezer and Glass is broken. refrigerator 2) Bad lamp assembly. Not inserted. compartment). Loosened by vibration. 3) Bad lamp socket. Disconnection. Bad soldering.
  • Page 62 PROBLEM DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 10. Structure, 1) Door foam. appearance Sag. Hinge loose Bolt is loosened during and others. Transportation. Not tightly fastened. Screw worn out . Weak gasket Adhesion surface. adhesion. Fixed tape. Poorly applied.

  • Page 63: Faults

    2. Faults 2-1. Power Problems Causes Checks Measures Remarks No power on - Power cord cut. - Check the voltage with tester. - Reattach the components. outlet. - Faulty connector insertion. - Check visually. - Reattach the connecting parts. - Faulty connection between plug - Check visually.
  • Page 64 2-3. Temperature Problems Causes Checks Measures Remarks High Poor cool air circulation due to faulty - Lock –– Check resistance with a - Replace fan motor. temperature fan motor. tester. in the freezer 0 : short. compartment. : cut. - Reconnect and reinsert. - Rotate rotor manually and check rotation.
  • Page 65 2-4. Cooling Problems Causes Checks Measures Remarks High Refrigerant leak. Check sequence Weld the leaking part, recharge the Drier must be replaced. temperature 1. Check the welded parts of the refrigerant. in the freezer drier inlet and outlet and drier compartment.
  • Page 66 Problems Causes Checks Measures Remarks High Cycle pipe is clogged. Check sequence. - Heat up compressor discharging Direr must be replaced. temperature in 1. Check temperature of condenser weld joints by contact, disconnect the freezer manually. the pipes, and check for clogging. compartment.
  • Page 67 2-5. Defrosting failure Problems Causes Checks Measures Remarks No defrosting. Heater does not generate heat as 1. Check the resistance of heater. Heating wire is short or wire is cut. Seal the lead wire with the heating wire is cut or the circuit 0 : Short.
  • Page 68 Problems Causes Checks Measures Remarks No defrosting Melting fuse blows out. - Check melting fuse with tester. - Faullty parts: parts replacement. 1) Lead wire is cut. If 0 : OK. - Check wire color when measuring 2) Bad soldering. : wire is cut.
  • Page 69 2-6. Icing Problems Causes Checks Measures Remarks Icing in the 1) Bad circulation of cool air. - Verify the food is stored properly - Be acquainted with proper use. - Check the defrost refrigerator - Clogged intake port in the (see it discharge and intake port - Seal on connecting parts.
  • Page 70 Problems Causes Checks Measures Remarks Ice in the freezer 1) Bad cool air circulation. - Check food storage conditions - Be acquainted with how to use. - Check the parts related compartment. - Intake port is clogged in the freezer visually.(Check clogging at intake - Check defrost (Check for ice on the to defrosting if the...
  • Page 71 2-7. Sound Problems Causes Checks Measures Remarks Hiss sound 1. Loud sound of compressor 1.1 Check the leveling of the 1) Maintain horizontal level. operation. refrigerator. 2) Replace bushing and seat if they 1.2 Check the bushing seat are sagged and aged. conditions (sagging and aging).
  • Page 72 Problems Causes Checks Measures Remarks Vibration sound. 1. Vibration of shelves and foods in 1-1. Remove and replace the 1) Reassemble the vibrating parts (Clunk) the refrigerator. shelves in the refrigerator and insert foam or cushion where 2. Pipe interference and capillary 1-2.
  • Page 73 Problems Causes Checks Measures Remarks Whining Sound It happens when refrigerant expands - Check the sound of refrigerant at the - Check the restrainer attached on the (almost the same at the end of capillary tube. initial installation. evaporator and capillary tube weld as animals crying - Check the sound when the refrigerator joints and attach another restrainer.
  • Page 74 2-8. Odor Problems Causes Checks Measures Remarks Food Odor. Food (garlic, kimchi, etc) - Check to see if food is not - Dry deodorizer in the bright well wrapped. ventilated place. - See if the shelves or inner wall - Store the food in the closed are stained with food juice.
  • Page 75 2-9. Micom Problems Symptom Causes Checks Measures Remarks Bad PCB All display Bad connection Bad connector Visual check on connector Reattach electric power. LCDS are off. between Main PCB connection from main connection. connector. and display circuit. PCB to display PCB. Defective PCB PCB transformer Check resistance of PCB...
  • Page 76 Problems Symptom Causes Checks Measures Remarks Bad cooling. Freezer Compressor does Compressor Lead Wire Check compressor Lead Wire Reconnect Lead temperature is not start. is cut. with a tester. Wire. high. Defective compressor Measure voltage at PCB CON5 Replace relay RY1 Refer to load drive relay.
  • Page 77 Problems Symptom Causes Checks Measures Remarks Bad cooling Wrong Defective AC Damper. Check AC damper Using a tester, see if AC Reconnect lead Refrigerator motor and reed switch damper motor and reed switch wire. temperature. and lead wire are cut. lead wire are cut with a tester.
  • Page 78 Problems Symptom Causes Checks Measures Remarks Bad defrost. Defrost is not Defrost lead wire is cut. Using a tester, check if defrost lead Reconnect Lead working. wire is cut with a tester. Wire. Defective defrost drive relay. Check the voltage of CON5 (1 and 7) Replace relay (RY 7 Refer to load with a tester after pressing main and RY 14) or PCB.
  • Page 79 Problems Symptom Causes Checks Measures Remarks Defective Buzzer rings Trouble mode indication. Check problem diagnosis function. Remedy faults Refer to mode display button. but key does indication in function when function button is explanations. pressed. Bad water/ice Buzzer Defective connecting lead wire from Check lead wire associated with door Repair lead wire.

  • Page 80: Cooling Cycle Heavy Repair

    PROBLEM DIAGNOSIS 3. Cooling Cycle Heavy Repair 3-1. The Heavy Repair Standards for Refrigerator with R134a Refrigerant Items Unit Standards Purposes Remarks Pipe and piping Min. Pipe: within 1 hour. To protect The opening time should be reduced to a half system opening Comp: within 10 from...
  • Page 81 PROBLEM DIAGNOSIS 3-2. Summary Of Heavy Repair Process Contents Tools Problem diagnosis Remove refrigerant - Cut charging pipe ends and discharge refrigerant from Filter, side cutters Residuals drier and compressor. - Use R134a oil and refrigerant for compressor and drier Pipe Cutter, Gas welder, N - Confirm N sealing and packing conditions before use.
  • Page 82 PROBLEM DIAGNOSIS 3-3. Precautions During Heavy Repair Items Precautions 1. Use of tools. 1) Use special parts and tools for R134a. 2. Removal of retained 1) Remove retained refrigerant more than 5 minutes after turning off a refrigerator. refrigerant. (If not, oil will leak inside.) 2) Remove retained refrigerant by cutting first high pressure side (drier part) with a nipper and then cut low pressure side.
  • Page 83 PROBLEM DIAGNOSIS 3-4. Practical Work For Heavy Repair Items Precautions 1. Removal of residual Evaporator Low pressure side refrigerant. NOTE: Observe the sequence for Compressor removal of refrigerant. Drier Suction (Otherwise, compressor oil may leak.) High pressure side Release Condenser Refrigent Intake 1) Remove residual refrigerant more than 5 minutes later after turning off the refrigerator.
  • Page 84 PROBLEM DIAGNOSIS Items Precautions Evaporator 4.Vacuum degassing. Suction pipe Compressor Drier Condenser pressure High Blue pressure Yellow NOTE: - If power is applied during vacuum degassing, vacuum Vaccum Pump degassing shall be more effective. Pipe Connection - Operate compressor Connect a red hose to the high pressure side and a blue hose to the while charging refrigerant.
  • Page 85 PROBLEM DIAGNOSIS Items Precautions Evaporator Compressor Drier Condenser Bombe 4) Refrigerant Charging Charge refrigerant while operating a compressor as shown above. 5) Pinch a charging pipe with a pinch-off plier after completion of charging. 6) Braze the end of a pinched charging pipe with copper brazer and perform a gas leakage test on the welded parts.
  • Page 86 PROBLEM DIAGNOSIS 3-6. Brazing Reference Drawings PIPE ASSEMBLY, HOT LINE PIPE ASSEMBLY, HOT LINE (Freezer) (Refrigerator) Copper Brazer Copper Brazer Copper CAPI - TUBE DRIER ASSEMBLY Brazer Silver Brazer PIPE ASSEMBLY, JOINT PIPE ASSEMBLY, SUCTION Copper Brazer PIPE ASSEMBLY, CONDENSER JOINT ASSEMBLY, WIRE Copper Brazer...

  • Page 87: How To Deal With Claims

    PROBLEM DIAGNOSIS 4. HOW TO DEAL WITH CLAIMS 4-1. Sound Problems Checks and Measures Hiss sounds Explain general principles of sounds. • All refrigerator when functioning properly have normal operating sound. The compressor and fan produce sounds. There is a fan in the freezer compartment which blows cool air to freezer and refrigerator compartments.
  • Page 88 PROBLEM DIAGNOSIS Problems Checks and Measures Sounds of water flowing Explain the flow of refrigerant. • When the refrigerator stops, the water flowing sound occurs. This sound happens when the liquid or vapor refrigerant flows from the evaporator to the compressor. Click sounds Explain the characteristics of moving parts.
  • Page 89 PROBLEM DIAGNOSIS 4-2. Measures for Temperature Related Symptoms Problems Checks and Measures Refrigeration is weak. Check temperature set by the temperature control knob. • Refrigerator is generally delivered with the button set at normal use (MID). But customer can adjust the temperature set depending on preference. If you feel the refrigeration is weak, then set the temperature control button at strong position.
  • Page 90 PROBLEM DIAGNOSIS 4-3. Odor and Frost Problems Checks and Measures Odor in the refrigerator compartment. Explain the basic principles of food odor. • Each food has its own particular odor. Therefore it is impossible to prevent or avoid food odor completely when food is stored in a completely sealed refrigerator compartment.
  • Page 91 PROBLEM DIAGNOSIS 4-4. Others Problems Checks and Measures The refrigerator case is hot. Explain the principles of radiator. • The radiator pipes are installed in the refrigerator case and partition plate between the refrigerator and the freezer compartment in order to prevent condensation formation.

  • Page 92: How To Disassemble And Assemble(Refrigerator Section)

    HOW TO DISASSEMBLE AND ASSEMBLE 1. DOOR (3) Disconnect upper hinge from a hinge supporter by grasping the front part of upper hinge and lifting up 1) Remove lower cover and then disconnect water (Hinge Assembly, U) in arrow direction A and pull forward in arrow B direction.

  • Page 93: Handle

    HOW TO DISASSEMBLE AND ASSEMBLE 2. HANDLE 4. SHROUD, GRILLE FAN Disconnect Cap by using Hexagon Wrench Dirver. 1) Loosen two screws after disconnecting a cap screw of a grille fan(U) with a blade screwdriver. 2) Disconnect Handle. 2) Disassembly of a grille fan(U) : Pull forward after 3) Disconnect Holder by using Hexagon wrench Driver.

  • Page 94: Shroud, Grille Fan

    HOW TO DISASSEMBLE AND ASSEMBLE 5. CONTROL BOX, R 6. CASE PWB 1) Disconnection of Cover Lamp, R(U) : Loosen one screw 1) Loosen ten screws in and remove cover PWB by in the center with a phillips screwdriver after pushing two pulling up in arrow direction.

  • Page 95: Icemaker Assembly

    HOW TO DISASSEMBLE AND ASSEMBLE 7-2. Basic Model 7. ICEMAKER ASSEMBLY 1) How to disassemble: 7-1. Dispenser Model (1) Remove ice tray assembly from the freezer 1) How to disassemble: compartment. (1) Remove ice bank from the freezer compartment. (2) Pull out knob from the ice tray in arrow direction. (At this time, pull out a knob in arrow direction while (2) Loosen two screws on the upper part of Icemaker shaking right and left as the knob is connected to...

  • Page 96: Dispenser

    HOW TO DISASSEMBLE AND ASSEMBLE 8. DISPENSER 4) Loosen four screws with a phillips screwdriver and pull the funnel Assembly to disconnect. 1) Disconnect button assembly by pulling down until it stops and then pull it forward. Funnel Assembly Funnel Assembly Button 5) Duct cap Assembly is disconnected if hold lever...

  • Page 97: Water Tank And Water Line

    HOW TO DISASSEMBLE AND ASSEMBLE 9. WATER TANK AND WATER LINE u The water tank at back and lower part of a refrigerator is attached by one screw and has a capacity containing of 7 glasses (180cc per glass) of cold water. It will take time to make more cold water in the tank.

  • Page 98: Digital Section Layout

    DIGITAL SECTION LAYOUT - 98 -...
  • Page 99 DIGITAL SECTION LAYOUT - 99 -...
  • Page 100 - 100 -...

  • Page 101: Digital Parts Manual

    DIGITAL PARTS MANUAL 1. MAIN CONTROLLER 1-1. Function This is one of the key components of the internet refrigerator, and it is a controller where TV, audio, video, input-output, internet functions reside. 1-2. Connector Connection Diagram and Names ATX POWER COM2 COM1 TV IN...
  • Page 102 DIGITAL PARTS MANUAL 1-3. Function and Connecting Parts Name Function Connecting Part Connect to supporting device (External CDROM) Extended connecting cable Connect to Internet network cable LAN connecting cable Contol TV-tuner TV-tuner COM1 COM2 External Device Communication Port 2 Extended connecting cable Hard disk data communication Hard disk ATX POWER...
  • Page 103 DIGITAL PARTS MANUAL 1-4. Specifications of parts 1. Main CPU SPEC (3) Plug and play Compatibility (PnP) (1) Maker Type: Geode GX1 300-B85 (4) 24 GPIO bit ports (2) Maker: National Semiconductor (5) FDC, KBC, two UARTs, IR support, IEEE1284 parallel (3) L1 Cache Size: 16KB port (4) CPU Power Consumption: 1.6V / 200MHz - 0.8W...
  • Page 104 DIGITAL PARTS MANUAL 2. SUB-CONTROLLER 2-1. Function : Sub Controller is composed of MICOM PART and AMP PART and - MICOM PART: senses refrigerator error and passes signals from remote control transmits to main controller - AMP PART: carries out the function of amplifying the small signal being input through the Sound Output of the MAIN CONTROLLER - 104 -...
  • Page 105 DIGITAL PARTS MANUAL 2-2. Outline Diagram and INPUT/OUTPUT Structure 2-2-1. Outline Diagram 2-2-2. INPUT/OUTPUT Structure SYMBOL INPUT/OUTPUT Input/Output SPEC SYMBOL INPUT/OUTPUT Input/Output SPEC DC 5V SOUND-L CON1 DC 5V CON4 SOUND-L2 REMOCON SOUND-R1 REF ERR-P3 REF ERR-P2 REF ERR-P1 CON2 SOUND-R2 REF ERR-P0 SOUND-R IN...
  • Page 106 DIGITAL PARTS MANUAL 3. HARDDISK 3-1. Function This is the program storage device for the Digital Section of the Internet Refrigerator 3-2. Outline Diagram <Operation Classification Chart> SPEC Operation SWITCH MODEL NAME REMARK Classification VERSION VERSION LANGUAGE NETWORK R-D732GRS KOREA NTSC STANDALONE VER 1.0...
  • Page 107 When servicing, the hard drive, it is replaced with the program preinstalled and according to the Operation Classification Chart. 3-4. SPEC of parts 1. HARDDISK SPEC (3.5˝) - MAKER: FUJITSU, MAXTOR, LG-IBM, SAMSUNG, WESTERN-DIGITAL - Storage Capacity: Over 20GB - Rotation Speed: Over 5,400rpm - Ultra DMA 100 support (average seek time: 9.5ms under) 2.
  • Page 108 DIGITAL PARTS MANUAL 4. TV-TUNER 4-1. Function After receiving and handling the video and audio signals through cable, it transmits the signals to the video input section of the main controller. 4-2. Outline Diagram and INPUT/OUTPUT Structure 4-2-1. Outline Diagram - 108 -...
  • Page 109 DIGITAL PARTS MANUAL 4-2-2. INPUT/OUTPUT Structure CONNECTOR PIN NO. I / O SYMBOL DESCRIPTION Output AUDIO-L AUDIO LEFT OUTPUT Output AUDIO-R AUDIO RIGHT OUTPUT Input POWER Input Input VIDEO Output TV OUT TV VIDEO Signal Output 4-3. Specifications of parts 1.
  • Page 110 DIGITAL PARTS MANUAL 5. POWER SUPPLY 5-1. Function This is the power supplying section for driving the main controller and hard disk. 5-2. Outline Diagram and INPUT/OUTPUT Structure 5-2-1. Outline Diagram Section D Connect to Section A Section E Section A - 110 -...
  • Page 111 DIGITAL PARTS MANUAL 5-2-2. INPUT/OUTPUT Structure (1) Section D Input voltage SPEC (2) VIEW-B Output Voltage SPEC PIN NO VOLTAGE OUTPUT VOLTAGE RANGE COLOR REMARK PIN NO INPUT VOLTAGE RANGE REMARK Output 3.0 ~ 3.6 ORANGE 90~264 INPUT NEUTRAL Output 3.0 ~ 3.6 ORANGE BLACK...
  • Page 112 After receiving the LCD video output from the main controller, this device outputs it to the LCD monitor 6-2. Outline Diagram 6-3. Specifications of parts 1. MAKER: LG PHILIPS 2. MAKER TYPE: LM151X3(B3AP) 3. 15.1˝ XGA TFT LCD SPEC - Pixel Pitch: 0.300mm X 0.300mm...
  • Page 113 DIGITAL PARTS MANUAL 7. LCD INVERTER 7-1. Function This device supplies the driving power for backlight inside the LCD. 7-2. Outline Diagram and INPUT/OUTPUT Structure 7-2-1. Outline Diagram 7-2-2. INPUT/OUTPUT Structure CONNECTOR PIN NO. INPUT/OUTPUT SYMBOL DESCRIPTION INPUT CTRL Dim. Adjust INPUT ON/OFF Power System Return (5V:ON, 0V:OFF)
  • Page 114 DIGITAL PARTS MANUAL 7-3. Specifications of parts 1. Maker: LG Electronics 2. Inverter Type: NMC1507-02 3. Maker Type: 6632Z-1507B 4. Inverter SPEC - Input Supply Voltage: DC 11~13V - Input Current: 1.1A - Input Power: 13.2W - Output Voltage: 616Vrms - Output Current: 9.0mArms...
  • Page 115 DIGITAL PARTS MANUAL 8. TOUCH SCREEN 8-1. Function Transmits the coordinates from the contact on the touch screen to the touch screen controller. 8-2. Outline Diagram 8-3. Specifications of parts 1. Touch Panel SPEC (15.1˝) - Analog Resistive (5-line resistance film type) - Operating Voltage: DC 5V - Resolution: 4,096 X 4,096 line - Activation Force: 57 ~ 113g...
  • Page 116 DIGITAL PARTS MANUAL 9. TOUCH CONTROLLER 9-1. Function After receiving and processing the touch coordinates from the touch screen, it transmits this information to the main controller 9-2. Outline Diagram and INPUT/OUTPUT Structure 9-2-1. Outline Diagram 9-2-2. INPUT/OUTPUT Structure CONNECTOR PIN NO.
  • Page 117 DIGITAL PARTS MANUAL 9-3. Connecting Method of Connector upon Replacement 9-4. Specification of parts 1. Operating Voltage: DC +5V ± 10% 2. Operating Current: 160mA (Peak 240mA) - 117 -...
  • Page 118 DIGITAL PARTS MANUAL 10. CCD (CHARGE COUPLED DEVICE) CAMERA 10-1. Function This changes the external video signal received through the lens into an electronic signal and transmits to main controller 10-2. Outline Diagram and INPUT/OUTPUT Structure 10-2-1. Outline Diagram 10-2-2. INPUT/OUTPUT Structure CONNECTOR PIN NO.
  • Page 119 DIGITAL PARTS MANUAL 11. REMOTE CONTROL RECEIVER 11-1. Function This device receives weak signal from the remote control, transfers then to a spherical wave and transmits to the remote control processing section in the sub-controller. 11-2. Outline Diagram and INPUT/OUTPUT Structure 12.
  • Page 120 DIGITAL PARTS MANUAL 13. SPEAKER 13-1. Function This device transfers and outputs the electronic signal amplified by the AMP in the sub controller into audible sounds. 13-2. Outline Diagram and INPUT/OUTPUT Structure. 13-3. Specifications of parts - Power Rating: RMS 3W / Peak 5W - Size: 110 X 42.5mm - Total weight: 151g - Impedence: 4ohm ±...
  • Page 121 Mode which protects the C drive so that it returns to the original state when rebooted even after modifications have been made. 14-2. Program Modification Method after entering in the Supervisor Mode LG-Logo Starting HDD Sheriff : located on top of the refrigerator door.

  • Page 122: Troubleshooting For The Digital Function Section

    Error Symptom Chart 1) Monitor does not operate normally. - Monitor Error Symptom 1: Only LG-logo is displayed - Monitor Error Symptom 2: Only stripes and white background are displayed - Monitor Error Symptom 3: No display at all 2) The touch screen does not work.
  • Page 123 TROUBLESHOOTING FOR THE DIGITAL FUNCTION SECTION Error Symptoms Contents to check Measures Monitor does not operate normally. - 123 -...
  • Page 124 TROUBLESHOOTING FOR THE DIGITAL FUNCTION SECTION Error Symptoms Contents to check Measures Monitor Error Symptom 3: No display at all Check power input/output Is the power switch on the top of the door turned on? LED location: ATX power lead-in sector Is the power LED of the Main Cont' Is the power supply...
  • Page 125 TROUBLESHOOTING FOR THE DIGITAL FUNCTION SECTION Error Symptoms Contents to check Measures The touch screen does not work. Check operation of touch screen Check power input of touch screen controller LED location: behind touch screen controller of the monitor section Is the touch screen controller LED lighted? Is the touch...
  • Page 126 TROUBLESHOOTING FOR THE DIGITAL FUNCTION SECTION Error Symptoms Contents to check Measures Sound cannot be Check the sound recorded. recorded function Check the microphone connection Is the connection Check monitor joint of the microphone connector connector and in the monitor section reconnect normal? Is the connection...
  • Page 127 TROUBLESHOOTING FOR THE DIGITAL FUNCTION SECTION Error Symptoms Contents to check Measures Remote Control Check the operation does not work. function of remote control Check the operation of MICOM (Sub Cont') which processes the remote control input. 1. Direct the remote control to the receiver (monitor).
  • Page 128 TROUBLESHOOTING FOR THE DIGITAL FUNCTION SECTION Error Symptoms Contents to check Measures There is no output of sound. - 128 -...
  • Page 129 TROUBLESHOOTING FOR THE DIGITAL FUNCTION SECTION Error Symptoms Contents to check Measures There is no TV output - 129 -...
  • Page 130 TROUBLESHOOTING FOR THE DIGITAL FUNCTION SECTION Error Symptoms Contents to check Measures There is no output of TV sound. The sensor for refrigerator errors does not work. - 130 -...

  • Page 131: External Extension Port

    EXTERNAL EXTENSION PORT 1. EXTERNAL EXTENSION PORT REF-POWER 1-1. TV - Connect to cable TV. 1-2. LAN - Connect Internet network cable 1-3. USB1,2 - Connect a keyboard when updating or revising programs in the digital section of the internet refrigerator - To use an Internet network cable, install the additional software provided by ISP (Internet Service Provider) Software Installation Method (1) Connect a USB Type CD-ROM to USB port 1.

  • Page 132: How To Disassemble And Assemble(Digital Section)

    HOW TO DISASSEMBLE AND ASSEMBLE(DIGITAL SECTION) 1. TOP COVER PART 1-1. Main Controller Part Unscrew two point. Disassemble after disconnecting Main Controller connections 1~16. 1-2. Sub-Controller, Deco Case Part Disassemble after disconnecting 1~7.
  • Page 133 HOW TO DISASSEMBLE AND ASSEMBLE(DIGITAL SECTION) 1-3. TV-Tuner Part Disassemble after disconnecting 1~4. 1-4. Hard Disk Part Unscrew 1 point. Disassemble after disconnecting 1~2.
  • Page 134 HOW TO DISASSEMBLE AND ASSEMBLE(DIGITAL SECTION) 1-5. Power Supply Part Unscrew 4 points. Disassemble after disconnecting 1~2. 1-6. Sub-PCB Part Disassemble after disconnecting 1~6. 1-7. Ref-Door Part Disassemble DECO CASE after disconnecting 1~4. Disassemble COVER-S disconnecting 5~10. Disassemble HINGE COVER after unscrewing 11. Disassemble the socket only when both sides are being pressed in.
  • Page 135 HOW TO DISASSEMBLE AND ASSEMBLE(DIGITAL SECTION) 2. MONITOR PART 1. Disassemble Monitor Cover, Frame LCD. 2. Disassemble Bracket after unscrewing. 3. Disassemble MONITOR after pulling out at bottom. 4. Unscrew No1, 2. 5. Disassemble Support Housing. 6. Disassemble Monitor after removing Connecters A, B, C.

  • Page 136: Exploded View

    EXPLODED VIEW FREEZER DOOR PART 200A 202A 206C 210B 205F 210A 205G 210C 205D 212A 210C 205G 212A 210C 205F 201A 203B 203A - 136 -...
  • Page 137 EXPLODED VIEW REFRIGERATOR DOOR PART 230A 241A 241B 206D 232A 147C 234A 147B 147A 205F 240A 205G 264B 264A 205D 240B 243B 243A 242A 240C 205G 243A 231A 233B 242A 233A 205F 240C - 137 -...
  • Page 138 EXPLODED VIEW FREEZER COMPARTMENT 270A 271B 271A 137C 137B 136C 136D 403A 402A 136B 136A 120B 135A 120B 120B 400A 120B 128A 302A 401A 128B 130A 128C 408B 128D 120A 120A 320A 120A 320B 272A 320B 320A 125A 102A 103A 408A 137B 135B...
  • Page 139 EXPLODED VIEW REFRIGERATOR COMPARTMENT 142A 141B 143A 142C 143A 146A 270B 171A 271B 141A 271A 171B 115A 116A 408B 141B 115B 143A 410A 152A 141C 402A 170A 401A 142A 152A 150A 141B 145A 143A 151B 145A 150B 151A 142C 143A 176A 176B 401B...
  • Page 140 EXPLODED VIEW DISPENSER PART 277A 278A 278C 402C 278B 276A 275A 278F 278E 405A 275D 278D 276B 401C 275C 275B 281A 280D 501A 280E 279D 280C 280B 280A 279B 279F 279C 279A - 140 -...
  • Page 141 EXPLODED VIEW ICE & WATER PART 622A 616E 616D 623A 404A 619A 612A 612C 600A 612B 610A 611B 607A 602A 611C 605A 604A 611A 616C 620A 601A 603B 620A 510B 616B 603A 615A 617A 404B 613A 614A 621B 606A - 141 -...
  • Page 142 EXPLODED VIEW MACHINE COMPARTMENT 502A 502B 303A 303B 304A 303C 303D 313A 300A 310B 307A 306C 307A 317A 301A 317B 308B 104A 306A 104B 310A 305A 305C 309C 403B 305B 309B 309A 308C 308A 305C 305B - 142 -...
  • Page 143 EXPLODED VIEW SPEAKER & MONITOR PART 721A 720D 520D 720A 723A 720D 720D 721A 406B 520F 720B 803A 822A 520G 804A 823A 800A 821C 821B 823B 821D 825A 820A 822B 821C 521A 820D 823B 821B 821A 821A 722A 820E 828A 827A 820C 824A...

  • Page 144: Digital Section Components

    DIGITAL PART COMPONENTS 714A 713A 711A 500A 709A 718A 716A 708A 704A 705A - 144 -...
  • Page 145 701A 710A 407A 712A 707A 706A 715A 702A - 145 -...

  • Page 146: Replacement Parts List

    P/No. 3828JD8454C OCT., 2002 Printed in Korea...

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