LG GR-J303TS Service Manual

LG GR-J303TS Manual

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  • LG GR-J303TS | Service Manual - Page 1
    http://biz.lgservice.com KIMCHI REFRIGERATOR SERVICE MANUAL CAUTION PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS MANUAL BEFORE CHECKING OR OPERATING THE REFRIGERATOR. MODEL : GR-J303T*
  • LG GR-J303TS | Service Manual - Page 2
    SAFETY INSTRUCTIONS 1. Firstly check that there is electrical leakage in the main body of the product. 2. Perform work a room dirty). CONTENTS 1. Product Specifications ...3 2. Circuit Diagram ...5 3. MICOM Function and Explanations of Circuits ...6 4. Exploded View and Service Parts List ...34 -2-
  • LG GR-J303TS | Service Manual - Page 3
    Compressor Evaporator of Top Compartment Cooling Evaporator of Cycle Middle Compartment Condenser 2 EA Refirgerant Refrigerant Oil Defrosting Device GR-J303TG SPEC 115V/60Hz 300 L 156 L GR-J303TS SPEC 115V/60Hz 300 L 156 L 144 L 144 L 667(W) X 670.4(D) 1775(H)mm 667(W) X 670.4(D) 1775
  • LG GR-J303TS | Service Manual - Page 4
    ITEMS P.T.C Overload Protector Fan Motor(Top) Fan Motor(Middle) Condenser Electrical System Rating Cooling Fan Motor Defrosting Top Heater Middle Front-C Heater Fuse-M(Top) Fuse-M(Middle) Protection Fuse Capacitor, R SPEC P6R8MD 4TM314TFB Ø110 Fan Ø110 Fan Ø110 Fan 115 V 140 W 115 V 180 W(
  • LG GR-J303TS | Service Manual - Page 5
    2. CIRCUIT DIAGRAM -5-
  • LG GR-J303TS | Service Manual - Page 6
    3. MICOM FUNCTION AND EXPLANATIONS OF CIRCUITS 3-1. EXPLANATION OF FUNCTION 3-1-1. DISPLAY PART (1) BEST MODEL(GR-J303TG) (2) BETTER MODEL(GR-J303TS) Cabbage/Radish/ Mul Kimchi Vegetble/ Fruit Light Freezing Frozen Food Chilled Food NOTCH Min Mid Max Min Mid Max Min Mid Max Min Mid Max Max
  • LG GR-J303TS | Service Manual - Page 7
    "Max" ' "Min" ' "Mid", and the food type changes as follows when the storage temperature level changes from "Min" ' "Mid". ("Freeze" ' "Refrigerate" ' "Kimchi") 3. When you press the "Middle compartment", "Storage" button, the storage temperature level changes from "Mid" ' "Max" ' "Min" ' "Mid", and
  • LG GR-J303TS | Service Manual - Page 8
    warm, the seasoning heater is turned off. 4. If a failure occurs, such as a sensor error during seasoning, the storage will default to Cabbage Kimchi storage status. 5. The 2nd seasoning is not included in the underground fermenting, in the 3rd seasoning, Perform the Low temperature mature keeping
  • LG GR-J303TS | Service Manual - Page 9
    and back light ON/OFF check) 3-1-6. LOCK FUNCTION (DISPLAY BUTTON LOCK/UNLOCK) 1. The "Lock" LED is turned on in the Lock status in application of refrigerator power. 2. Turn the "Unlock" LED by pressing the Lock/Unlock button for 2 seconds or more to allow operation of the display button. 3. Buzzer
  • LG GR-J303TS | Service Manual - Page 10
    temperature through ambient temperature of the refrigerator to prevent that the in-refrigerator temperature changes according to ambient where defrosting sensor temperature of each room reaches to 7°C (16°C for GR-J213) for the upper compartment, 16°C for the middle compartment respectively,
  • LG GR-J303TS | Service Manual - Page 11
    COMPARTMENT ON COMPARTMENT OFF COMPARTMENT OFF ON When defrosting sensor temperature at the upper compartment is less than 45°C (In power failure, service) 4 FRONT 4 SINGLE 0.3 0.3 FRONT sec -C sec MOTOR sec COMP sec -C HEATER DAMPER ON HEATER OFF ON ON 10 UPPER sec COMPARTMENT FAN
  • LG GR-J303TS | Service Manual - Page 12
    Mode 1. Failure diagnosis function is intended in order that service is easily done when failure to affect performance of the than failure code turn off in occurrence of failure. BEST MODEL (GR-J303TG) BETTER MODEL (GR-J303TS) NO Item 1 Failure of upper compartment (K1) sensor Failure Display
  • LG GR-J303TS | Service Manual - Page 13
    (2) Load Operation in Failure NO ITEM 1 Normal COMP Classification UPPER COMPARTMENT FAN MIDDLE COMPARTMENT FAN DEFROSTING HEATER OF UPPER COMPARTMENT DEFROSTING HEATER OF MIDDLE COMPARTMENT STEPPING MOTOR DAMPER SINGLE MOTOR DAMPER 3-WAY VALVE FRONT-C HEATER O O O O O O O Failure
  • LG GR-J303TS | Service Manual - Page 14
    3-1-14. TEST FUNCTION 1. Test function is intended to check function of PCB and the product and find a failure part with failure status. 2. The test S/W exists on the main PCB, and ends the test mode after 2 hours irrespective of the test mode, and then returns to normal status. 3. Function button
  • LG GR-J303TS | Service Manual - Page 15
    3-2. EXPLANATION OF CIRCUITS 3-2-1. POWER CIRCUIT Power circuits consist of SMPS (Switching Mode Power Supply) power, and the SMPS consists of the rectification part (BD1, CE1) to convert AC voltage to DC voltage, the switching part (IC3) to switch the converted DC voltage, a transformer to transfer
  • LG GR-J303TS | Service Manual - Page 16
    3-2-4. LOAD/BUZZER DRIVE CRICUIT (1) Load Drive Circuit Type of Load COMP, Mechanical Area FAN UPPER FAN MOTOR UPPER DEFROST HEATER MIDDLE FAN MOTOR MIDDLE DEFROST HEATER MIDDLE LOWER FERMENT FERMENT HEATER HEATER SINGLE MOTOR DAMPER FRONT-C HEATER Measuring Point(IC7) Status ON OFF No.
  • LG GR-J303TS | Service Manual - Page 17
    display PCB) g Only the buzzer sound for the Lock/Unlock operation is shown in this SVC technical manual. LED MODULE TYPE 78 P35 (INT1) 79 P36 (PWM3/TC3/PDO3) Status Measuring Ex) Lock: of the test switch for checking refrigerator or the reed switch of the single motor damper. REED Switch - 17 -
  • LG GR-J303TS | Service Manual - Page 18
    3-2-6. TEMPERATURE SENSING CIRCUIT ⃄ (LED:6871JB1400, LCD:6871JB1399) Above circuits consist of the upper sensor, middle sensor, lower sensor for adjusting setup temperature at the upper, middle and lower compartment, the ambient temperature sensor to detect ambient air temperature, the upper
  • LG GR-J303TS | Service Manual - Page 19
    3-2-7. TEMPERATURE SENSING CIRCUIT 1.Temperature adjustment at the lower compartment consists of the circuit part for driving the damper, as electronic single motor damper, to open or close the baffle and the reed switch part to detect open/close status of the damper. 2. Drives the motor, and if
  • LG GR-J303TS | Service Manual - Page 20
    3-2-8. STEPPING MOTOR DAMPER DRIVE CIRCUIT (FOR TEMPERATURE CONTROL AT MIDDLE COMPARTMENT) As for motor drive, the motor rotates since rotation magnetic force is formed at coils wound around each phase of the motor and the stator if outputting "High" "Low" signal as much as the fixed step numbers
  • LG GR-J303TS | Service Manual - Page 21
    3-2-9. 3-WAY VALVE STEPPING MOTOR DRIVE CIRCUIT (FOR SWITCHING UPPER/MIDDLE/LOWER COMPARTMENT CYCLE) As for motor drive, the motor rotates since rotation magnetic force is formed at coils wound around each phase of the motor and the stator via the IC11 (TD62308AP) as IC for motor drive if
  • LG GR-J303TS | Service Manual - Page 22
    3-2-10. KEEPING TEMPERATURE COMPENSATION AND TOO COLD/ TOO WARM CUT COMPENSATION CIRCUIT (1) Keeping Temperature Compensation Circuit MIDDLE COMPARTMENT KEEPING TEMPERATURE COMPENSATION LOWER COMPARTMENT KEEPING TEMPERATURE COMPENSATION (UPPER COMPARTMENT SENSOR) u This circuit is used for
  • LG GR-J303TS | Service Manual - Page 23
    u Temperature compensation table at the upper compartment is as follows: Division Modification RCF1:3 KΩ RCF1:2.4 KΩ RCF1:1.8 KΩ RCF1:1.2 KΩ RCF1:620 Ω RCF1: Current RCF2: RCF2: RCF2: RCF2: RCF2: RCF2: RCF1: RCF1: RCF1: RCF1: RCF1: RCF2:1.2 KΩ RCF2:2.4 KΩ RCF2:3 KΩ RCF2:5.1 KΩ RCF2:6.2
  • LG GR-J303TS | Service Manual - Page 24
    value +1 °C -1 °C 0 °C 0 °C (When shipping from factory) u The cut compensation circuit compensates the keeping temperature of the upper/middle/lower compartment by simply cutting it out of service for a brief period. - 24 -
  • LG GR-J303TS | Service Manual - Page 25
    3-2-11. COMMUNICATION CIRCUIT BETWEEN MAIN PCB AND DISPLAY PCB Following circuits as communication circuits are circuits for changing necessary information between the main MICOM of the main PCB and the MICOM for LED control of the display PCB. DC12V for driving the display PCB, transmit/receive
  • LG GR-J303TS | Service Manual - Page 26
    3-3. SENSOR RESISTANCE CHARACTERISTICS TABLE Measuring Temperature(°C) -20 °C -15 °C -10 °C -5 °C 0 °C +5 °C +10 °C +15 °C ` +20 °C +25 °C +30 °C +40 °C +50 °C Upper/Middle/Lower sensors, RT sensor, Upper/Middle defrosting sensors 77 KΩ 60 KΩ 47.3 KΩ 38.4 KΩ 30 KΩ 24.1 KΩ 19.5 KΩ 15
  • LG GR-J303TS | Service Manual - Page 27
    3-4. PCB PARTS DIAGRAM AND LIST 3-4-1. PWB(PCB) ASSEMBLY, MAIN(LED MODULE TYPE) (1) Parts diagram 6871JB1129 "W" - 27 -
  • LG GR-J303TS | Service Manual - Page 28
    (2) Parts List - 28 -
  • LG GR-J303TS | Service Manual - Page 29
    SRT ASSEM - 29 -
  • LG GR-J303TS | Service Manual - Page 30
    3-4-2. PWB(PCB) ASSEMBLY, DISPLAY [STANDARD] (1) Parts diagram (2) Parts List - 30 -
  • LG GR-J303TS | Service Manual - Page 31
    3-5. PCB CIRCUIT DIAGRAM - PCB CIRCUIT DIAGRAM MAY CHANGE DEPENDING ON SITUATION. 3-5-1. PWB (PCB) ASSEMBLY, MAIN CIRCUIT DIAGRAM (LED MODULE TYPE) - 31 -
  • LG GR-J303TS | Service Manual - Page 32
    (LCD: 6871JB1464, LED: 6871JB1465) - 32 -
  • LG GR-J303TS | Service Manual - Page 33
    3-5-2. PWB (PCB) ASSEMBLY, DISPLAY CIRCUIT DIAGRAM (LCD: 6871JB1464, LED: 6871JB1465) - 33 -
  • LG GR-J303TS | Service Manual - Page 34
    4. EXPLODED VIEW AND SERVICE PARTS LIST 4-1. EXPLODED VIEW u GR-J303T* 103B 103A 411A 410G 501A 501F 501K 610E 281A 281B 619B 301A 401A 404A 405C 405A 329A 304A 108A 605A 105B 184C 105A 109B 316A
  • LG GR-J303TS | Service Manual - Page 35
    u GR-J303TG 155A 155C 155B 149A 150A 150C 150B 150F 150G 150E 149B 150D 155A 155C 155B 150A 150C 150B 153A 150F 153C 150G 150E 150D
  • LG GR-J303TS | Service Manual - Page 36
    u GR-J303TS 149C 150A 150A 140A 203A 201A 157A 206A 239A 207A 157B 157C 157D 205A 205D 212A 279A 154B 154A 150B 206B 204C 202A 205D 205A - 36 -
  • LG GR-J303TS | Service Manual - Page 37
    u GR-J303TG/GR-J303TS 604E 604G 241A 251A 253C 248A 253B 160C 253A 254A 252C 252B 252A 604G 604E 253C 253B 160C 248B 253C 254B 203B 205H 205A 205J 205A 244A 201B 241B 203C 205J 205A 244A 201C 205H 205A - 37 -
  • LG GR-J303TS | Service Manual - Page 38
    u GR-J303TG/TS 253A 253C 253B 252A 252C 252B 252A 252C 252B 128B - 38 -
  • LG GR-J303TS | Service Manual - Page 39
    SERVICE PARTS LIST u GR-J303TG Shelf Shelf,Glass Door Assembly,Freeze Room Stopper,Door Guide,Rail Guide,Rail Shelf Assembly,Freezer Door Assembly,Freeze Room Basket Refrigerator Door Foam Assembly,Refrigerator Stopper,Door Gasket Assembly,Door Gasket Assembly,Door Gasket Assembly,Door PTNO Qty GR
  • LG GR-J303TS | Service Manual - Page 40
    ,Freezer Name Plate Basket,Door Basket,Door Handle Assembly,Refrigerator Handle Assembly,Refrigerator Barrier Assembly,Insulation Rail Assembly,TV Rail Assembly,TV Base Assembly,Compressor Roller Common Damper,Noise PTNO Qty GR-J303TG 5078JA0072A 1 5006JA3098C 6 4930JA2114A 1 4930JA2114B
  • LG GR-J303TS | Service Manual - Page 41
    619A 619B Description Drier Assembly Holder,Drier Tray,Drip Guide,Fan Bracket,Valve Condenser Assembly,Wire Damper Damper,Pipe Fan Motor Bracket,Motor Damper,Motor Support Damper,Motor Support Switch,Push Button Capacitor, Valve Assembly,Check PTNO Qty GR-J303TG 5851JA2002T 1 4930JA3034A 1
  • LG GR-J303TS | Service Manual - Page 42
    ,Refrigerator Door Foam Assembly,Refrigerator Stopper,Door Gasket Assembly,Door Gasket Assembly,Door Gasket Assembly,Door Cap,Decor Freezer Cap,Handle Holder,Handle Holder,Handle Holder,Handle Holder,Handle Holder,Handle Decor,Door Decor,Door Panel Assembly,Metal Handle,Freezer PTNO Qty GR-J303TS
  • LG GR-J303TS | Service Manual - Page 43
    Roller Common Damper,Noise Drier Assembly Holder,Drier Tray,Drip Guide,Fan Bracket,Valve Condenser Assembly,Wire Damper PTNO Qty GR-J303TS 3846JD1007B 1 5004JA0007C 1 5004JA0006B 1 3650JA1245D 1 3650JA1245D 1 4791JA1036J 1 5219JA1004G 1 5219JA1004H 1 5075JA1030F 2 5075JA1028E
  • LG GR-J303TS | Service Manual - Page 44
    Controller Assembly AC Motor AC Motor Bracket,Motor Damper,Motor Support Switch,Push Button Capacitor,Electric Appliance Film,Radial Capacitor,Electric ,Sensor Valve Assembly,Pipe Valve Assembly,Check PTNO Qty GR-J303TS 4J03020A 1 5901JA1014A 1 5901JA1007A 1 5901JA1013A 1 4999JA1017B
  • LG GR-J303TS | Service Manual - Page 45
    , Freezer Bucket, Assembly, Side Dish Bucket, Side Dish Cover Assembly, Bucket Bucket Assembly, Side Dish Bucket, Side Dish Cover Assembly, Bucket PTNO Qty GR-J303TG GR-J303TS 5026A1176C 1 5075J1024E 4 5074JA1043C 1 3551JA1052E 1 5075JA1023E 2 5074JA1042C 1 3551JA1051E 1 - 45 -
  • LG GR-J303TS | Service Manual - Page 46
    P/No. 3828JD8947B JAN., 2007 Printed in Korea
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CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS MANUAL
BEFORE CHECKING OR OPERATING THE REFRIGERATOR.
KIMCHI REFRIGERATOR
SERVICE MANUAL
MODEL : GR-J303T*