LG GR-J303T Service Manual

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CAUTION

PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS MANUAL BEFORE CHECKING OR OPERATING THE REFRIGERATOR.

KIMCHI REFRIGERATOR

SERVICE MANUAL

http://biz.lgservice.com

MODEL : GR-J303T*

1. Firstly check that there is electrical leakage in the main body of the product.

2. Perform work always after removing the power plugs in handling with the part where electricity conducts through.

3. Wear a rubber gloves(insulation gloves) for preventing electrical shock accident in case of testing with power on.

4. Always check rated current, voltage and capacity in using the instruments.

5. Exercise care so that water does not enter into electrical parts around the machine room.

6. Take care so that things should not fall down by removing them cleanly on the product when leaning the product forward or backward. Especially, take care of thin things (glass panels, books).

7. Ensure to consult the repair and maintenance center shop when the cold storage cycle is damaged (to prevent that gas inside of the cycle gets a room dirty).

SAFETY INSTRUCTIONS

1. Product Specifications ..........................................................................................................................................................3

2. Circuit Diagram ....................................................................................................................................................................5

3. MICOM Function and Explanations of Circuits ....................................................................................................................6

4. Exploded View and Service Parts List ................................................................................................................................34

CONTENTS

- 2 -

1-1. GR-J303T*

1. PRODUCT SPECIFICATIONS

Rating

Defrosting Device

Dimensions (mm)

Net Weight

Motor Power Consumption

Cooling Method

Insulation

Evaporation Dish

Basket

Storage Container

Drawer

Shelf

Flap Door

Low temperature Catalyst

Deodorization

115V/60Hz 115V/60Hz

300 L 300 L 156 L 156 L

144

667(W) X 670.4(D) 1775(H)mm 667(W) X 670.4(D) 1775(H)mm

113 Kg 103 Kg

138W 138W

Indirect Cooling System

Force Automation Automation

Force

Light Polyurethane Foam

1 EA (Behind)

2 EA

14 EA 8 EA

1 EA 3 EA 3 EA 1 EA

1 EA

2 EA

LC62LBCM

Fin Tube Type

Wire Condenser, Back Plate Condenser

R134a (160 g) R134a (160 g)

α10G 310cc α10G 311cc

Heater, Sheath

Capacity

Defrosting

System

Cooling

Cycle

Net Capacity

Top Compartment

Middle/Bottom

Compartment

Method

Start

End

Evaporation

Compressor

Evaporator of

Top Compartment

Evaporator of

Middle Compartment Condenser 2 EA

Refirgerant

Refrigerant Oil

ITEMS SPEC SPEC

MODEL GR-J303TG GR-J303TS

- 3 -

- 4 -

P6R8MD P6R8MD

4TM314TFB 4TM314TFB

Ø110 Fan Ø110 Fan Ø110 Fan Ø110 Fan

Ø110 Fan Ø110 Fan

115 V 140 W 115 V 140 W

115 V 180 W(Half wave 90 W) 115 V 180 W(Half wave 90 W)

120 V(UL) 7 W 120 V(UL) 7 W Cutted at 70 °C Cutted at 70 °C Cutted at 70 °C Cutted at 70 °C

250 V 9 A 250 V 9 A

14㎌ / 250Vac 14㎌ / 250Vac

Electrical

System

Rating

Defrosting

Heater

Top

Middle

P.T.C

Overload Protector

Fan Motor(Top)

Fan Motor(Middle)

Condenser

Cooling Fan Motor

Front-C Heater

Fuse-M(Top) Fuse-M(Middle) Protection Fuse

Capacitor, R

ITEMS SPEC SPEC

2. CIRCUIT DIAGRAM

- 5 -

3-1. EXPLANATION OF FUNCTION

3-1-1. DISPLAY PART

(1) BEST MODEL(GR-J303TG)

(2) BETTER MODEL(GR-J303TS)

1. MICOM becomes "Lock" status in initial application of power, and the upper room is indicated as "Freezing Food." "Mid", the middle room as "Cabbage" "Mid", and the lower room as "Cabbage" "Mid".

2. MICOM maintains the previous display status in power failure and re-application of power. But in case of a power-shut or power reconnection during rhythm fermenting, the temperature returns to "Mid" for the applicable food type.

3. Buzzer sound neither ring ever pressing the button in "Lock" status, nor performs function.

3. MICOM FUNCTION AND EXPLANATIONS OF CIRCUITS

- 6 -

NOTCH

Temperature

setting

Cabbage/Radish/ Mul Kimchi

Vegetble/ Fruit Light Freezing Frozen Food Chilled Food

Min Mid Max Min Mid Max Min Mid Max Min Mid Max Max Min Mid Max

1.0°C -0.5°C -2.0°C 4.5°C 3.5°C 2.5°C -4.0°C -5.0°C -6.0°C -15°C -18°C -21°C -25°C 5.0°C 2.0°C 0.0°C

3-1-2. Food storage/seasoning function

(1) When selecting food type and storage temperature

1. Press the “Lock/Unlock” button for more than 2 seconds to “Unlock” the refrigerator.

2. When you press the “Uppper compartment”, ”Store” button in this condition, the storage temperature level changes from “Mid” ’ ”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 the food type changes as follows when the storage temperature level changes from “Min” ’ ”Mid”. (“Cabbage Kimchi” ’ ”Old Kimchi” ’ ”Light freezing” ’ ”Vegetable/fruit”)

4. When you press the “Lower compartment”, “Storage” button, the storage temperature level changes from “Mid” ’ ”Max” ’ ”Min” ’ ”Mid”, and the food type changes as follows when the storage temperature level changes from “Min” ’ ”Mid”. (“Cabbage Kimchi” ’ ”Old Kimchi” ’ ”Broth Kimchi” ’ ”Vegetable/fruit”)

5. Press the “Lock/Unlock” button to end the food storage and storage temperature selection. At this time, if no button is selected for 1 minute without the “Lock/Unlock” button pressed, the unit will automatically switch to the Lock condition and end the selection.

(2) When selecting food type and rhythm fermenting (seasoning)

1. Press the “Lock/Unlock” button for more than 2 seconds to “Unlock” the refrigerator.

2. When you press the “Ferment” button at this condition, the rhythm fermenting (seasoning) changes from “Fermented 1( )” ’ “Fermented 2 ( )” ’ ”More fermented ( )” ’ ”Underground fermented( )” ’ ”Less fermented 1( )” ’ ”Less fermented 2( )”, and the food type changes from Middle compartment: “Cabbage Kimchi” ’ ”Old Kimchi” ’ ”Cabbage Kimchi”, Lower compartment: “Cabbage Kimchi” ’ ”Radish Kimchi” ’ ”Broth Kimchi” ’ ”Cabbage Kimchi” when the Rhythm Ferment (Seasoning) changes to “Less fermented 2” or “Fermented 1”. (But, the uppper compartment only has the underground fermenting function.)

3. When you press the Ferment button when the food type is “Vegetable/fruit”, “Light freezing”, it is set to “Cabbage Kimchi – Fermented 1”.

4. Press the “Lock/Unlock” button to end the food storage and storage temperature selection. At this time, if no button is selected for 1 minute without the “Lock/Unlock” button pressed, the unit will automatically switch to the Lock condition and end the selection.

(3) When selecting Flavor Keeping

1. Press the “Lock/Unlock” button for more than 2 seconds to “Unlock” the refrigerator.

2. The Flavor Keeping function can only be selected when the food type of “Cabbage Kimchi”, “Old Kimchi”, “Radish Kimchi” or “Broth Kimchi” is selected.

3. When you press the “Flavor Keeping” button at this condition, the Flavor Keeping function will toggle between selected and canceled. (But if both the middle compartment and the lower compartment has food type that can use Flavor Keeping, operate in the order of Middle compartment Flavor Keeping ON ’ Lower compartment Flavor Keeping ON ’ Middle/Lower compartment Flavor Keeping ON ’ Middle/Lower compartment Flavor Keeping OFF ’ Middle compartment Flavor Keeping ON.

4. Press the “Lock/Unlock” button to end the Flavor Keeping. At this time, if no button is selected for 1 minute without the “Lock/Unlock” button pressed, the unit will automatically switch to the Lock condition and end the Flavor Keeping.

5. When you select the Flavor Keeping during the fermenting process, the fermenting will immediately end and the Flavor Keeping function will start. AT this time, the storage temperature is automatically set to “Mid”.

6. When you select the Flavor Keeping, it controls at lower temperature to keep the current taste of Kimchi longer. (-1 deg for “Min”, -0.5deg for “Mid” and 0 deg for “Max”.)

7. During the Flavor Keeping operation, the unit runs a cold shock operation every 12 hours.

8. When you select the rhythm fermenting while executing the Flavor Keeping, the Flavor Keeping function will be canceled.

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- 8 -

3-1-3. Rhythm fermenting control pattern diagram

1. The fermenting control pattern varies, depending on the temperature of the Kimchi when it is placed into the storage, the type of Kimchi being made and the degree of the seasoning selected.

2. In the 1st seasoning cycle, if the Kimchi is at room temperature, the cold control operates.

3. During the seasoning cycle, if the Kimchi is cold, the seasoning heater is turned on and if the Kimchi is 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 2ndseasoning is not included in the underground fermenting, in the 3rdseasoning, Perform the Low temperature mature keeping the Temperature is 3

Time

Seasoning complete

Kimchi sensor temperature

18 ℃

(Mul Kimchi:

10 ℃)

5 ℃

1.0 ℃

-0.5 ℃

-2.0 ℃

Storage

operation

When the Kimchi placed in

the refrigerator is cool

When the Kimchi

placed in the refrigerator

is at room temperature

1st

seasoning

2nd

seasoning

3rd

seasoning

4th

seasoning

5th

seasoning

Seasoning start

: Seasoning heater ON/OFF : Seasoning heater OFF

- 9 -

3-1-4. TEMPERATURE CONTROL AT UPPER, MIDDLE AND LOWER COMPARTMENT

(1) Temperature control at upper compartment

1. Turn COMP, upper compartment fan motor depending on temperature of the upper compartment sensor and cool them by opening the 3-way valve to the upper compartment.

2. However, cooling of the upper compartment starts after cooling of the Middle/lower compartment is completed while the middle/lower compartment is cooling (Max 25 min).

(2) Temperature control at middle/lower compartment

1.Turn COMP, middle compartment fan motor depending on temperature of the middle/lower compartment sensor and cool them by opening the 3-way valve to the middle/lower compartment ,and opening the middle/lower damper.

2. However, cooling of the middle/lower compartment starts after cooling of the upper compartment is completed while the upper compartment is cooling (Max 35 min).

(3) Operation conditions of COMP

1. COMP turns on by the upper compartment sensor and lower compartment sensor.

2. COMP turns off by the upper compartment sensor, middle compartment sensor and lower compartment sensor.

(4) Operation conditions of 3-way valve

1. Open the upper, middle and lower compartment valve by the upper, middle or lower compartment sensor .

2. Perform operation for minimum 25 minutes (for 35 minutes at middle, lower compartment) upon request of “open” (unsatisfactory temperature) at the other side while COMP operates with the valve opened in one side, and then cutoff the valve to other side. In this case, immediately cutoff the valve if temperature is met even if 25 minutes (35 minutes for middle, lower compartment) have not passed.

3. In input of initial power, cool from the upper compartment where the upper compartment is Data Frz. (Deep Frz), Frz. when all upper/middle/lower compartment is not satisfactory, and firstly cool from the middle, lower compartment for the other case.

3-1-5. LCD BACK LIGHT CONTROL (LIMITED TO LCD MODEL)

1. To make the LCD display easy to see, the LCD back light is turned on for 1 minute for the initial power connection or for 20 seconds for the final button operation.

2. When you press any display button when the back light is turned off, the button command will not be executed nor the buzzer sound generated. Only the back light will be turned on. But only the “Lock/Unlock” button will operate normally. (When you press the button when the LCD back light is turned off, only the command to turn on the back light will be executed.)

3. When you press the “Storage” button of the uppper compartment and the “Storage” button of the lower compartment simultaneously for more than 1 second, the back light will be turned on and all the graphics on the LCD will be turned on. When you release the buttons, the LCD graphics will return to the prior condition and the back light turned off. (LCD graphic 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 sound neither rings ever by pressing any button other than the Lock/Unlock button, nor performs function with the “Lock” LED turned on.

4. The “Lock” LED automatically turns on and becomes lock status unless operating the display button for more than a minute with the “Unlock” LED turned on.

- 10 -

3-1-7. FRONT-C HEATER CONTROL

1. A heater for prevention of dewing is installed on the FRONT-C part between the middle compartment and the lower compartment, and turns on at the time of COMP ON and for 20 minutes after COMP OFF.

2. It turns off in the test mode (turn on after power off for normal operation).

3-1-8. BUZZER RINGING

1. “Ding~Dong~” sound rings when pressing the front display button.

2. No buzzer rings if pressing the button not according to the operation order.

3-1-9. POWER FAILURE COMPENSATION FUNCTION

1. Previous operation is performs even applying power again after power failure. However, error status or test mode status is excluded.

3-1-10. OPERATION RESPOND TO AMBIENT TEMPERATURE

1. This is function of maintaining keeping temperature constantly irrespective of season by compensating for the inrefrigerator temperature through ambient temperature of the refrigerator to prevent that the in-refrigerator temperature changes according to ambient temperature (weak cold in winter, excess cold in summer).

3-1-11. DEFROSTING (REMOVAL OF FROST)

1. Defrosting is simultaneously performed by using the defrosting heater at the upper compartment and the middle compartment whenever sum of compressor operation time reaches to 6 hours.

2. Defrosting is started if sum of compressor operation time reaches to 4 hours in input of initial power (or in returning from power failure).

3. Complete defrosting function 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, after starting defrost work. However, poor defrost is indicated if not reaching to 7°C (16°C for GR-J213) for the upper compartment, 16°C for the middle compartment respectively 2 hours after starting defrost (See 3-1-11 Failure Diagnosis Function).

4. Poor defrost is indicated if the defrosting sensor is poor, and defrosting of the relevant room is not done.

-1.5 °C

-0.5 °C

4.0 °C

Keeping Temperature

(based on “Mid”)

Season Spring Summer Fall Winter

Operation Respond to Ambient Temperature

In General Operation

3-1-12. SEQUENTIAL OPERATION OF ELECTRICAL PARTS

Electrical parts such as COMP, defrosting heater at the upper & middle compartment, fan motor at the upper & middle compartment, single motor damper and FRONT-C heater sequentially operate as followers for preventing noise and damage of parts occurred by that various parts operate at the same time in input of initial power on and after test closing (including temporary power failure, either):

- 11 -

Function Operation Sequence Remarks

In initial power on

When

defrosting

sensor

temperature at

the upper

compartment is

more than 45°C

(In purchasing,

movement)

When

defrosting

sensor

temperature at

the upper

compartment is

less than 45°C

(In power

failure, service)

No initial

operation is

done if error

occurs

during

operation.

POWER

SINGLE MOTOR

DAMPER

COMP

F-FAN

SINGLE MOTOR

DAMPER

OFF

5~6 sec

0.5

sec

3-WAY VALVE

OFF

3~6 sec

0.5 sec

FRONT

-C

HEATER

0.5 sec

0.3 sec

sec

0.3 sec

4~5 sec

STEPPING

MOTOR

DAMPER

STEPPING

MOTOR

DAMPER

OFF

POWER

DEFROSTING HEATER AT UPPER COMPARTMENT

DEFROSTING

HEATER AT MIDDLE COMPARTMENT

DEFROSTING HEATER AT UPPER

COMPARTMENT

OFF

DEFROSTING HEATER AT MIDDLE

COMPARTMENT

OFF

FRONT

-C

HEATER

FRONT

-C

HEATER

OFF

SINGLE MOTOR

DAMPER

COMP

FRONT

-C

HEATER

0.5

sec

0.3 sec

sec

0.3 sec

sec

0.3 sec

sec

10~30

sec

UPPER

COMPARTMENT

FAN

SINGLE MOTOR

DAMPER

OFF

0.5

sec

5~6 sec

3-WAY VALVE

3-WAY

VALVE

OFF

0.5 sec

3~6 sec

STEPPING

MOTOR

DAMPER

STEPPING

MOTOR

DAMPER

OFF

3-1-13. FAILURE DIAGNOSIS FUNCTION

(1) Failure Mode

1. Failure diagnosis function is intended in order that service is easily done when failure to affect performance of the product during use occurs.

2. Function is neither done, nor buzzer sound rings even when pressing the button in occurrence of failure.

3. The product returns to normal operation if failure is released during display of failure code in occurrence of failure (RESET).

4. LEDs other than failure code turn off in occurrence of failure.

Note 1) All LEDs except for failure display LED (F1, F2, F3, F4, F5) turn on if simultaneously pressing both upper “Store”

button and middle “Store” button for a second where poor ambient temperature sensor exists.

- 12 -

Failure Display

(Food LED)

F1 F2 F3 F4 F5

NO Item

Failures

Remarks

Failure of upper compartment (K1) sensor

Failure of middle compartment (K2) sensor

Failure of lower compartment (K3) sensor

Failure of upper compartment defrosting sensor

Failure of middle compartment defrosting sensor

sensor Failure of ambient temperature sensor

Failure of single motor damper

Poor defrosting at upper compartment

Poor defrosting at middle compartment

Poor communication

Upper compartment sensor is disconnected or shorted

Middle compartment sensor is disconnected or shorted

Lower compartment sensor is disconnected or shorted

Upper compartment defrosting sensor is disconnected or shorted

Middle compartment defrosting sensor is disconnected or shorted

Ambient temperature sensor is disconnected or shorted

When ON/OFF of the reed-S/W is not dectected even when driving the single motor damper for 2 minutes

When defrosting sensor at the upper compartment does not reach to more than 7°C even when two hours have passed after starting defrost

When defrost sensor at the middle compartment does not reach to more than 16°C even when two hours have passed after starting defrost

When no communication is consecutively done for 30 seconds

* Check wiring of respective

relevant sensor.

Damper motor damaged, frozen, coil damaged, driving IC(photo coupler) failure

Short of temperature fuse, short of heater, clogging of drain, poor heater driving relay

Taking out of connector, Poor TR on communication part

Note 1)

BEST MODEL (GR-J303TG)

BETTER MODEL (GR-J303TS)

(2) Load Operation in Failure

- 13 -

Classification

ITEM

UPPER

COMPARTMENT

FAN

COMP

DEFROSTING

HEATER OF

UPPER

COMPARTMENT

DEFROSTING

HEATER OF

MIDDLE

COMPARTMENT

STEPPING

MOTOR

DAMPER

SINGLE MOTOR

DAMPER

3-WAY VALVE

FRONT-C

HEATER

MIDDLE

COMPARTMENT

FAN

Normal Failure of

Upper compartment (K1) sensor

Failure of Middle compartment (K1) sensor

Failure of Upper compartment (K1) sensor

Failure of Upper compartment defrosting sensor

Failure of Middle compartment defrosting sensor

Failure of ambient Temperature sensor

Poor defrosting at upper compartment

Poor defrosting at middle compartment

Failure of single motor damper

Poor communication

15 min

ON/

15 min

OFF

Don’t

defrost

(immediat

ely return)

Don’t

defrost

(immediat

ely return)

15 min OPEN/ 15 min

(No

compensation of ambient temperature

)

10 min OPEN/ 15 min

(No compensation of ambient temperature

)

Perform

normal initialization by checking

operation

in the cycle

of 1 hour

(Linked

with

COMP.

However,

FRONT-C

heater

turns off

for 15 minutes and turn

on again if the heater

turn on

time

continues

for more

than 40

minutes)

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 is neither detected, nor button recognition sound comes out during the test mode.

4. Ensure to take the power cords out in completion of the test mode so that normal status will be arrived.

5. Release the test mode and display the failure mode if failure such as sensor failure during the test mode.

6. No test mode is performed even when pressing the test button during display of failure code.

• LED check function

All LEDs turn on if pressing both upper “Store” button and middle “Store” button at the same time for 1 second or more, and display the previous status if releasing the button.

• FRONT-C Heater touching inspection mode

The FRONT-C heater consecutively turns on for 5 minutes and is then released if pressing both upper “Store” button and lower “Ferment” button for 5 seconds or more. It is released if pressing them again for 5 senconds or more.

- Release check: LED on the remainder time display part of the lower compartment turns on with pressing for 5 seconds or more.

- Input check: LED on the flavor keeping part turns on with pressing for 5 seconds or more.

- 14 -

MODE OPERATION DETAILS REMARKS

TEST1

TEST2

Normal

status

Press the test S/W once

Press the test S/W once in the test mode 1

Press the test S/W 3 times in the test mode 2

1. COMP (* Fan motor at machine room) ON

2. Defrost heater OFF at upper, middle compartment.

3. FRONT-C heater OFF

4. Fan motor at upper/middle compartment, damper at middle/lower compartment and 3-way valve operates to cool the upper/middle&lower compartment in interval of 16/24 minute.

5. For display, the only “Min” LED of the upper room turns on.

1. COMP (* Fan motor at machine room) OFF

2. Fan motor OFF at upper, middle compartment

3. Defrost heater ON at upper, middle compartment

4. FRONT-C heater ON

5. All dampers at middle, lower compartment are closed.

6. 3-way valve maintains previous status.

7. For display, the only “MIN” LED of the upper room turns on.

Returns to initial status

Returns to normal status when maximum 2 hours have passed.

Defrost sensor at the upper compartment performs initialization at more than 7 °C, and middle defrost sensor at more than 16 °C (COMP delay for 7 minutes)

COMP operates after delay for 7 minutes

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 energy of the primary side on the switching terminal, secondary side power to supply power to the MICOM and IC and the feed back part (IC4, IC5) to feedback the secondary side voltage to the primary side of transformer in order to maintain it uniformly.

Caution.: Take a measure after more than 3 minutes have passed after removing the power cords in abnormal operation of

circuits since high voltage (DC310V) is maintained at the power terminal. Otherwise, it may cause electric shock.

Voltage of each part is as follows:

3-2-2. OSCILLATION CIRCUIT

Oscillation circuits are intended to generate clock for synchronization for information transmission/receipt of logic elements inside of the IC1 (MICOM) and generate basic time for time calculation. Rated parts must be used since the OSC1 does not operate or time calculated at the IC1 changes where SPEC changes.

3-2-3. RESET CIRCUIT

The reset circuits are intended so that the whole of function is started at the initial status by initializing various parts such as ram inside of the MICOM (IC1) when power is applied to MICOM again in input of initial power or by temporary power failure. “LOW” voltage is applied to the reset terminal of MICOM for the fixed time (10ms) at the start of power input.

During general operation, the reset terminal is at 5V (No MICOM operates in case of poor reset IC).

- 15 -

Part Both ends of VA1 Both ends of CE1 Both ends of CE2 Both ends of CE3 Both ends of CE4

Voltage 220 Vac 310 Vdc 16 Vdc 12.5 Vdc 5 Vdc

3-2-4. LOAD/BUZZER DRIVE CRICUIT

(1) Load Drive Circuit

Type of Load

COMP ,

Mechanical

Area FAN

UPPER

FAN

MOTOR

UPPER

DEFROST

HEATER

FRONT-C

HEATER

SINGLE MOTOR

DAMPER

MIDDLE

DEFROST

HEATER

MIDDLE

FERMENT

HEATER

LOWER

FERMENT

HEATER

MIDDLE

FAN

MOTOR

Measuring Point(IC7) No.10 No.16 No.12

Q1 Collector

No.11 No.15 No.13 Q2 Colletor No.14

Status

ON Within 1V

OFF 11 ~ 13 V

- 16 -

(2) Buzzer driving circuit (located on display PCB)

g Only the buzzer sound for the Lock/Unlock operation is shown in this SVC technical manual.

3-2-5. SWITCH INPUT CIRCUIT

Following circuits are input circuits for detecting signal of the test switch for checking refrigerator or the reed switch of the single motor damper.

- 17 -

REED Switch

P35 (INT1)

P36 (PWM3/TC3/PDO3)

LED MODULE TYPE

Ex) Lock: "Ding-D-Dong" sound Ex) Lock: "Ding-D-Dong" sound Off

IC101 (Pin 3/61)

IC101 (Pin 2/62)

Measuring point

Status

45ms

1046.5Hz 1174.7Hz 1318.5Hz

45ms 45ms 45ms 70ms 750ms

5V 0V

45ms

1568.0Hz 1318.5Hz 1046.5Hz

45ms 45ms 45ms 70ms 750ms

5V 0V

3-2-6. TEMPERATURE SENSING CIRCUIT

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 defrost sensor and the middle defrost sensor attached to the evaporator at the upper, middle compartment to detect the defrost return temperature. Status in short or open are as follows:

- 18 -

(외기 센서)

Ⓐ

Ⓑ

Ⓒ

Ⓓ

Ⓔ

Ⓕ

(LED:6871JB1400, LCD:6871JB1399)

Sensor Check points Normal (-30 °C ~ 50 °C) In Short In Open

Ambient temp. Sensor Upper Sensor Middle Sensor Lower Sensor Upper Defrost Sensor Middle Defrost Sensor

0.5V ~ 4.5V 0V 5V

POINT ⒶVoltage POINT ⒷVoltage POINT ⒸVoltage POINT ⒹVoltage POINT ⒺVoltage POINT ⒻVoltage

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 there is no status change of the reed switch within 2 minutes, determines it as failure and displays as failure (See 3-1-11. Failure Diagnosis Function).

3. Rotates once for 15 seconds irrespective of temperature to detect damper status in input of initial power (initial drive inspection).

4. Open/Close of the damper, status of the reed switch and No.1 pin input of the IC1 (MICOM) are as follows:

u The above time is time until the single motor stops after status change of the reed switch.

- 19 -

Single Motor Damper

100V~127V

deleted

 

Open/Close status

of lower damper

Single Damper

Reed Switch

IC1 (MICOM) “H” : 5V No.1 pin input “L” : 0V

2sec

Operation Stop

OPEN

OFF

Position

Lower Damper status

 Open

 Close

3-2-8. STEPPING MOTOR DAMPER DRIVE CIRCUIT (FOR TEMPERATURE CONTROL A T 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 through the MICOM pin 51 and pin 52 after applying “High” signal to the IC 12 (TA777AP) from the MICOM pin 53.

Explanation) For driving method of the motor, send signal in the cycle of 3.33ms by using the terminal of the MICOM PIN53,

52 and 51 as shown in waveform of each part below. This signal is output to the output terminal No.10, 11, 14, 15 via the input terminal No.3, 6, 8 of the IC12 (TA7774P) as IC for motor drive. The motor rotates by which motor coils wound around each phase of the stator forms rotation magnetic field. The stepping motor damper rotates by which motor coils wound around each phase of the stator forms rotation magnetic field if inputting as figure to the input part (No.3 INA, No.6 INB) of the IC12 (TA7774P) for motor drive.

- 20 -

하칸 온도 제어용

IC12 No.3 (INA)

IC12 No.6 (INB)

IC12 No.15 (A)

IC12 No.10 (B)

IC12 No.14 (A)

IC12 No.11 (B)

CCW (reverse rotation) CW (positive rotation)

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 outputting “High” “Low” signal as much as the fixed step numbers from the MICOM pin 50, 47 and 48.

Explanation) For driving method of the motor, send signal in the cycle of 30ms by using the terminal of the MICOM PIN 50,

47, 49 and 48 as shown in waveform of each part below. This signal is output to the output terminal No.10, 15, 7, 2 via the input terminal No.11, 14, 6, 3 of the IC11 (TD62308AP) as IC for motor drive. The motor rotates by which motor coils wound around each phase of the stator forms rotation magnetic field.

- 21 -

상칸/중•하칸 CYCLE 절환용

IC12 No.10 (A)

IC12 No.15 (B)

IC12 No.7 (A)

IC12 No.2 (B)

CCW (reverse rotation)CW (positive rotation)

3-2-10. KEEPING TEMPERA TURE COMPENSATION AND TOO COLD/ TOO WARM CUT COMPENSATION CIRCUIT

(1) Keeping Temperature Compensation Circuit

u This circuit is used for entering the required level of temperature compensation into MICOM to adjust keeping

temperature at the upper, middle and lower compartment.

u Temperature compensation table by adjustment of resistance value (difference value against current temperature).

Ex) Temperature at the middle compartment increases by +1°C if changing compensation resistance at the middle

compartment (RCT) from 10K (current resistance) to 18K (corrected resistance).

- 22 -

MIDDLE COMPARTMENT KEEPING TEMPERATURE COMPENSATION

LOWER COMPARTMENT KEEPING TEMPERATURE COMPENSATION

16.2KF

(UPPER COMPARTMENT SENSOR)

Upper Compartment Middle/Lower Compartment

Remarks

6.2 KΩ +2.5 °C 180 KΩ +2.5 °C

5.1 KΩ +2.0 °C 56 KΩ +2.0 °C 3 KΩ +1.5 °C 33 KΩ +1.5 °C

2.4 KΩ +1.0 °C 18 KΩ +1.0 °C

1.2 KΩ +0.5 °C 12 KΩ +0.5 °C

0 °C 10 KΩ 0 °C

620 Ω -0.5 °C 8.2 KΩ -0.5 °C

1.2 KΩ -1.0 °C 5.6 KΩ -1.0 °C

1.8 KΩ -1.5 °C 3.3 KΩ -1.5 °C

2.4 KΩ -2.0 °C2 KΩ -2.0 °C 3 KΩ -2.5 °C 470 Ω -2.5 °C

RCF2RCF1

Resistance Value

T emperature

Compensation

T emperature

Compensation

warmer

Cooler

Standard temperature

RCB(Lower)RCT(Middle)

Resistance Value

u Temperature compensation table at the upper compartment is as follows:

u Temperature compensation table at the middle/ lower compartment is as follows:

- 23 -

470 Ω 2 KΩ 3.3 KΩ 5.6 KΩ 8.2 KΩ 10 KΩ 12 KΩ 18 KΩ 33 KΩ 56 KΩ 180 KΩ

470 Ω

No change

0.5 °C up 1 °C up 1.5 °C up 2 °C up 2.5 °C up 3 °C up 3.5 °C up 4 °C up 4.5 °C up 5 °C up

2 KΩ

0.5 °C

down

No change

0.5 °C up 1 °C up 1.5 °C up 2 °C up 2.5 °C up 3 °C up 3.5 °C up 4 °C up 4.5 °C up

3.3 KΩ

1 °C

down

0.5 °C

down

No change

0.5 °C up 1 °C up 1.5 °C up 2 °C up 2.5 °C up 3 °C up 3.5 °C up 4 °C up

5.6 KΩ

1.5 °C

down

1 °C

down

0.5 °C

down

No change

0.5 °C up 1 °C up 1.5 °C up 2 °C up 2.5 °C up 3 °C up 3.5 °C up

8.2 KΩ

2 °C

down

1.5 °C

down

1 °C

down

0.5 °C

down

No change

0.5 °C up 1 °C up 1.5 °C up 2 °C up 2.5 °C up 3 °C up

10 KΩ

2.5 °C

down

2 °C

down

1.5 °C

down

1 °C

down

0.5 °C

down

No change

0.5 °C up 1 °C up 1.5 °C up 2 °C up 2.5 °C up

12 KΩ

3 °C

down

2.5 °C

down

2 °C

down

1.5 °C

down

1 °C

down

0.5 °C

down

No change

0.5 °C up 1 °C up 1.5 °C up 2 °C up

18 KΩ

3.5 °C

down

3 °C

down

2.5 °C

down

2 °C

down

1.5 °C

down

1 °C

down

0.5 °C

down

No change

0.5 °C up 1 °C up 1.5 °C up

33 KΩ

4 °C

down

3.5 °C

down

3 °C

down

2.5 °C

down

2 °C

down

1.5 °C

down

1 °C

down

0.5 °C

down

No change

0.5 °C up 1 °C up

56 KΩ

4.5 °C

down

4 °C

down

3.5 °C

down

3 °C

down

2.5 °C

down

2 °C

down

1.5 °C

down

1 °C

down

0.5 °C

down

No change

0.5 °C up

180 KΩ

5 °C

down

4.5 °C

down

4 °C

down

3.5 °C

down

3 °C

down

2.5 °C

down

2 °C

down

1.5 °C

down

1 °C

down

0.5 °C

down

No change

Middlle

Compartment

(RCT)

Lower

Compartment

(RCB)

Modification

Division

Current

No change

0.5 °C up 1 °C up 1.5 °C up 2 °C up 2.5 °C up 3 °C up 3.5 °C up 4 °C up 4.5 °C up 5 °C up

0.5 °C

down

No change

0.5 °C up 1 °C up 1.5 °C up 2 °C up 2.5 °C up 3 °C up 3.5 °C up 4 °C up 4.5 °C up

1 °C

down

0.5 °C

down

No change

0.5 °C up 1 °C up 1.5 °C up 2 °C up 2.5 °C up 3 °C up 3.5 °C up 4 °C up

1.5 °C

down

1 °C

down

0.5 °C

down

No change

0.5 °C up 1 °C up 1.5 °C up 2 °C up 2.5 °C up 3 °C up 3.5 °C up

2 °C

down

1.5 °C

down

1 °C

down

0.5 °C

down

No change

0.5 °C up 1 °C up 1.5 °C up 2 °C up 2.5 °C up 3 °C up

2.5 °C

down

2 °C

down

1.5 °C

down

1 °C

down

0.5 °C

down

No change

0.5 °C up 1 °C up 1.5 °C up 2 °C up 2.5 °C up

3 °C

down

2.5 °C

down

2 °C

down

1.5 °C

down

1 °C

down

0.5 °C

down

No change

0.5 °C up 1 °C up 1.5 °C up 2 °C up

3.5 °C

down

3 °C

down

2.5 °C

down

2 °C

down

1.5 °C

down

1 °C

down

0.5 °C

down

No change

0.5 °C up 1 °C up 1.5 °C up

4 °C

down

3.5 °C

down

3 °C

down

2.5 °C

down

2 °C

down

1.5 °C

down

1 °C

down

0.5 °C

down

No change

0.5 °C up 1 °C up

4.5 °C

down

4 °C

down

3.5 °C

down

3 °C

down

2.5 °C

down

2 °C

down

1.5 °C

down

1 °C

down

0.5 °C

down

No change

0.5 °C up

5 °C

down

4.5 °C

down

4 °C

down

3.5 °C

down

3 °C

down

2.5 °C

down

2 °C

down

1.5 °C

down

1 °C

down

0.5 °C

down

No change

Upper

Compartment

(RCF1,

RCF2)

Modification

Current

RCF1:3 KΩ RCF2:

Division

RCF1:3 KΩ RCF2:

RCF1:2.4 KΩ RCF2:

RCF1:1.8 KΩ RCF2:

RCF1:1.2 KΩ RCF2:

RCF1:620 Ω RCF2:

RCF1: RCF2:

RCF1: RCF2:1.2 KΩ

RCF1: RCF2:2.4 KΩ

RCF1: RCF2:3 KΩ

RCF1: RCF2:5.1 KΩ

RCF1: RCF2:6.2 KΩ

RCF1:2.4 KΩ RCF2:

RCF1:1.8 KΩ RCF2:

RCF1:1.2 KΩ RCF2:

RCF1:620 Ω RCF2:

RCF1: RCF2:

RCF1: RCF2:1.2 KΩ

RCF1: RCF2:2.4 KΩ

RCF1: RCF2:3 KΩ

RCF1: RCF2:5.1 KΩ

RCF1: RCF2:6.2 KΩ

(2) Too Cold/Too Warm Cut Compensation Circuit.

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 -

JCF1 JCF2 JCT1 JCT2 JCB1 JCB2

CUT +2 °C +1 °C CUT +1 °C CUT +1 °C

CUT -2 °C -1 °C CUT -1 °C CUT -1 °C

CUT CUT 0 °C0 °C CUT CUT 0 °C CUT CUT 0 °C

Upper compartment

cut compensation

Upper

compartment

temperature

compensation

value

Middle

compartment

temperature

compensation

value

Lower

compartment

temperature

compensation

value

Too warm

compensation

Frozen

Food

The

others

0 °C

(When shipping

from factory)

0 °C

(When shipping

from factory)

0 °C

(When shipping

from factory)

Too cold

compensation

Middle compartment

cut compensation

Lower compartment

cut compensation

Too warm compensation

Too cold

compensation

Too warm compensation

Too cold

compensation

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 circuits are required.

Poor communication occurs where continuing information change between the main MICOM of the main PCB and the MICOM for LED control of the display PCB is not done for more than 30 seconds.

- 25 -

DISPLAY PCBMAIN PCB

MAIN MICOM

MICOM for

LED Control

DC 12V

GND

Transmit (error status)

Receive (notch status)

3-3. SENSOR RESISTANCE CHARACTERISTICS TABLE

u Allowance of sensor resistance is 3%. u Measure resistance value of sensor after leaving it for more than 3 minutes (delay is required due to sensing speed). u Always use a digital tester! Analog testers have too great a margin of error. u Measure resistance after separating PWB (PCB) assembly, the CON6 on the main part since the upper compartment

sensor and the middle compartment sensor have no connector. Measure resistance at both ends of No.6, 7 of the CON5 for the RT-sensor. However, measure resistance at both ends of the sensor after separating barrier assembly between the middle compartment and the lower compartment for the lower compartment sensor.

- 26 -

Measuring Temperature(°C) Upper/Middle/Lower sensors, RT sensor, Upper/Middle defrosting sensors

-20 °C 77 KΩ

-15 °C 60 KΩ

-10 °C 47.3 KΩ

-5 °C 38.4 KΩ 0 °C 30 KΩ

+5 °C 24.1 KΩ +10 °C 19.5 KΩ +15 °C 15.9 KΩ

` +20 °C 13 KΩ

+25 °C11 KΩ +30 °C 8.9 KΩ +40 °C 6.2 KΩ +50 °C 4.3 KΩ

(LCD MODULE:6871JB1464)

(LED MODULE:6871JB1465)

(Ambient temperature sensor)

(UPPER SENSOR)

(MIDDLE SENSOR)

(LOWER SENSOR)

(UPPER DEFROSTING SENSOR)

(MIDDLE DEFROSTING SENSOR)

3-4. PCB PARTS DIAGRAM AND LIST

3-4-1. PWB(PCB) ASSEMBLY, MAIN(LED MODULE TYPE)

(1) Parts diagram

- 27 -

6871JB1129

"W"

(2) Parts List

- 28 -

- 29 -

SRT ASSEM

3-4-2. PWB(PCB) ASSEMBLY, DISPLAY [STANDARD]

(1) Parts diagram

- 30 -

(2) Parts List

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 -

- 32 -

(LCD: 6871JB1464, LED: 6871JB1465)

3-5-2. PWB (PCB) ASSEMBLY, DISPLAY CIRCUIT DIAGRAM

- 33 -

(LCD: 6871JB1464, LED: 6871JB1465)

4-1. EXPLODED VIEW

GR-J303T*

4. EXPLODED VIEW AND SERVICE PARTS LIST

- 34 -

282B

103B

103A

610E

108A

106A

104B

106A

104A

406B

301A

418A

281B

501K

410G

501A

281A

330B

332B

301B

418B

103C

184C

605A

404A

405C

405A

329A

105A

318A

317A

310A

323B

329C

420A

312A

319C

315A

315B

315C

315B

319A

309B

314A

307A

304A

332C

245A

501F

105B

619A

109B

401A

619B

401B

411A

319D

327B

316A

405A

405C

329B

328A

308A

309A

404B

331D

GR-J303TG

- 35 -

202A

155A

155C

155B

155A

155C

155B

153A

153C

153B

157D

157C

157B

157A

149B

149A

150B

150F

150C

150D

150A

150E

150G

150B

150F

150C

150D

150A

150E

150G

152A

150B

150C

151A

151B

154A

154B

150F

150G

203A

206A

207A

206B

201A

204C

205A

205D

212A

205E

205A

239A

GR-J303TS

154A

154B

203A

206A

207A

206B

201A

204C

205A

205D

212A

205D

205A

149C

140A

157D

157C

157B

157A

150B

150A

279A

202A

239A

- 36 -

GR-J303TG/GR-J303TS

- 37 -

241B

604G

604E

252C

252A

253A

254A

252B

253C

253B

253C

254B

248B

604G

604E

241A

248A

160C

251A

253C

253B

203B

201B

205A

205H

205J

205A

244A

203C

201C

205A

205H

205J

205A

244A

160C

- 38 -

GR-J303TG/TS

252A

252C

128B

252B

252A

252C

252B

253A

253C

253B

4-2. SERVICE PARTS LIST

GR-J303TG

- 39 -

LOC.

Description

PTNO

Qty

NO GR-J303TG

150G Guide,Rail MEA30433102 2

151A Shelf Assembly,Freezer AHT30605401 1 151B Door Assembly,Freeze Room ADC30604001 1 152A Basket MAN30345501 1 153A Bucket Assembly,Side Dish AKC30625301 2 153B Bucket,Side Dish MKK30356001 1 153C Cover Assembly,Bucket ACQ30678101 1 154A Guide Assembly,Rail AEC30604401 1 154B Guide Assembly,Rail AEC30604402 1 155A Bucket Assembly,Side Dish AKC30625201 2 155B Bucket,Side Dish MKK30352101 1 155C Cover Assembly,Bucket ACQ30677901 1 157A Cover Assembly,Deodorizer ACQ30638001 1 157B Cover,Deodorizer MCK32972501 1 157C Cover,Deodorizer MCK32293801 1 157D Deodorizer 5986JA3006D 1 160C Roller Assembly 4581JA3003D 2 160C Roller Assembly 4581JA3003D 2 184C Plate,Center 3446JA2048F 1 201A Door Foam Assembly ADD30277504 1 201B Door Foam Assembly,Refrigerator 5433JA1168M 1 201C Door Foam Assembly,Refrigerator 5433JA1169M 1 202A Stopper,Door J325-00032A 1 203A Gasket Assembly,Door 4987JA1024Y 1 203B Gasket Assembly,Door 4987JA1024L 1 203C Gasket Assembly,Door 4987JA1024M 1

- 40 -

LOC.

Description

PTNO

Qty

NO GR-J303TG

204C Cap,Decor Freezer 5078JA0072A 1 205A Cap,Handle 5006JA3098C 6 205D Holder,Handle 4930JA2114A 1 205E Holder,Handle 4930JA2114B 1 205H Holder,Handle 4930JA2115A 1 205H Holder,Handle 4930JA2115A 1

205J Holder,Handle 4930JA2115B 1

205J Holder,Handle 4930JA2115B 1 206A Decor,Door 3806JA1205A 1 206B Decor,Door 3806JA1206C 1 207A Frame Assembly,LCD 3210JA1082Q 1 212A Handle Assembly,Freezer AED30620702 1 239A Name Plate 3846JD1007B 1 241A Basket,Door 5004JA0007C 1 241B Basket,Door 5004JA0006B 1 244A Handle Assembly,Refrigerator 3651JA2261F 1 244A Handle Assembly,Refrigerator 3651JA2261F 1 245A Barrier Assembly,Insulation 4791JA1036J 1 248A Rail Assembly,TV 5219JA1004G 1 248B Rail Assembly,TV 5219JA1004H 1 251A Bucket Assembly,Side Dish 5075JA1030F 2 252A Bucket Assembly,Side Dish 5075JA1028E 2 252B Bucket,Side Dish 5074JA1053C 1 252C Cover Assembly,Bucket 3551JA1070E 1 253A Bucket Assembly,Side Dish 5075JA1030F 2 253B Bucket,Side Dish 5074JA1057C 2 253C Cover Assembly,Bucket 3551JA1069E 3 254A Bucket Assembly,Side Dish 5075JA1027E 2 254B Bucket,Side Dish 5074JA1052C 1 281A Cover,Hinge 3550JA1251D 1 281B Hinge Assembly,Upper 4775JA2008D 1 282B Hinge Assembly,Center 4775JA2115A 1 301A Evaporator Assembly 5421JA0045C 1 301B Evaporator Assembly 5421JA0027E 1 304A Cover Assembly,Machinery(Rear) 3551JA1039A 1 307A Compressor,Set Assembly 2521C-A62CD 1 308A Thermistor,PTC 6748C-0002C 1 309A Overload Protect 6750C-0004S 1 309B Drawing,Assembly 6877JB2163G 1 312A Damper Assembly,Seat 5041JA3001A 4 314A Stopper,Compressor 4J03277A 3 315A Base Assembly,Compressor 3103JA0010C 1 315B Roller 3J02312A 2 315C Common 4J04238A 2 316A Damper,Noise 5072JA3003F 2

- 41 -

LOC.

Description

PTNO

Qty

NO GR-J303TG

317A Drier Assembly 5851JA2002T 1

318A Holder,Drier 4930JA3034A 1

319A Tray,Drip 3390JA0008B 1 319C Guide,Fan 4974JA1036B 1 319D Bracket,Valve 4810JA2139A 1

323B Condenser Assembly,Wire 5403JA1044A 1

327B Damper 5040JA3063A 2

328A Damper,Pipe 4J03020A 1

329A Fan Assembly 5901JA1014A 1

329B Fan Assembly 5901JA1007A 1 329C Fan Assembly 5901JA1013A 1

330B Shroud Assembly,Freezer 4999JA1017B 1 331D Shroud,Freezer MHN30355601 1

332B Grille Assembly,Fan 3531JA1021B 1 332C Grille Assembly,Fan 3531JA1022A 1

401A Controller Assembly 6615JB2005D 1

401B Controller Assembly 6615JB2005A 1

404A AC Motor 4680JB1036H 1

404B AC Motor 4680JB1036N 1

405A Bracket,Motor 4810JA3007B 2 405C Damper,Motor Support J756-00008B 2 405D Damper,Motor Support 5040JA2004B 2

406B Switch,Push Button 6600JB1005D 1 410G Capacitor,Electric Appliance Film,Radial 0CZZJB2010H 1 410H Capacitor,Electric Appliance Film,Radial J513-00012P 1

411A Power Cord Assembly 6411JB1011B 1

418A Heater,Sheath 5300JB1121D 1

418B Heater,Sheath 5300JB1085D 1

420A Motor,DC 4680JB1035H 1

501A PCB Assembly,Main 6871JB1129Q 1

501F Cover,PCB 3550JA1399C 1

501K Case,PCB 3110JA1020B 1

604E Deodorizer 4756JA3001D 2 604G Cover,Deodorizer 3550JA2143C 2

605A Roller Assembly AHJ30124501 4

610E Cover,Sensor 3550JA2035D 1

619A Valve Assembly,Pipe 5221JA1008A 1

619B Valve Assembly,Check 5221JA3002C 1

GR-J303TS

- 42 -

LOC.

Description

PTNO

Qty

NO GR-J303TS

103A Handle,Rear 3650JA2061W 1 103B Handle,Rear 3650JA2061X 1 103C Cover,Lower 3550JA0121A 1 104A Leg Assembly,Frame AFC30700601 1 104B Leg Assembly,Frame AFC30700602 1 105A Tube Assembly,Drain 5251JA3003D 1 105B Tube Assembly,Drain 5251JA2006A 1 106A Leg,Adjust 4778JA2016D 1 106A Leg,Adjust 4778JA2016D 1 108A Tray Assembly,Drain 3391JA2027A 1 109B Cap,Screw 5006JA3017G 2 140A Door Assembly,Freeze Room ADC30624601 1 150A Tray Assembly,Drawer AJP30624701 2 150B Tray Assembly,Drawer AJP30624801 1 154A Guide Assembly,Rail AEC30604401 1 154B Guide Assembly,Rail AEC30604402 1 157A Cover Assembly,Deodorizer ACQ30638001 1 157B Cover,Deodorizer MCK32972501 1 157C Cover,Deodorizer MCK32293801 1 157D Deodorizer 5986JA3006D 1 160C Roller Assembly 4581JA3003D 2 160C Roller Assembly 4581JA3003D 2 184C Plate,Center 3446JA2048F 1 201A Door Foam Assembly ADD30277503 1 201B Door Foam Assembly,Refrigerator 5433JA1168U 1 201C Door Foam Assembly,Refrigerator 5433JA1169U 1 202A Stopper,Door J325-00032A 1 203A Gasket Assembly,Door 4987JA1024Y 1 203B Gasket Assembly,Door 4987JA1024L 1 203C Gasket Assembly,Door 4987JA1024M 1 204C Cap,Decor Freezer 5078JA0072A 1 205A Cap,Handle 5006JA2070B 6 205D Holder,Handle 4930JA2112C 2 205H Holder,Handle 4930JA2113C 1 205H Holder,Handle 4930JA2113C 1 205J Holder,Handle 4930JA2113D 1 205J Holder,Handle 4930JA2113D 1 206A Decor,Door 3806JA1205A 1 206B Decor,Door 3806JA1206C 1 207A Panel Assembly,Metal AGL30700506 1 212A Handle,Freezer 3650JA1245C 1

- 43 -

LOC.

Description

PTNO

Qty

NO GR-J303TS

239A Name Plate 3846JD1007B 1 241A Basket,Door 5004JA0007C 1 241B Basket,Door 5004JA0006B 1 244A Handle,Freezer 3650JA1245D 1 244A Handle,Freezer 3650JA1245D 1 245A Barrier Assembly,Insulation 4791JA1036J 1 248A Rail Assembly,TV 5219JA1004G 1 248B Rail Assembly,TV 5219JA1004H 1 251A Bucket Assembly,Side Dish 5075JA1030F 2 252A Bucket Assembly,Side Dish 5075JA1028E 2 252B Bucket,Side Dish 5074JA1053C 1 252C Cover Assembly,Bucket 3551JA1070E 1 253A Bucket Assembly,Side Dish 5075JA1030F 2 253B Bucket,Side Dish 5074JA1057C 2 253C Cover Assembly,Bucket 3551JA1069E 3 254A Bucket Assembly,Side Dish 5075JA1027E 2 254B Bucket,Side Dish 5074JA1052C 1 279A Frame Assembly,Display ADV30639709 1 281A Cover,Hinge 3550JA1251D 1 281B Hinge Assembly,Upper 4775JA2008D 1 282B Hinge Assembly,Center 4775JA2115A 1 301A Evaporator Assembly 5421JA0045C 1 301B Evaporator Assembly 5421JA0027E 1 304A Cover Assembly,Machinery(Rear) 3551JA1039A 1 307A Compressor,Set Assembly 2521C-A62CD 1 308A Thermistor,PTC 6748C-0002C 1 309A Overload Protect 6750C-0004S 1 309B Drawing,Assembly 6877JB2163G 1 312A Damper Assembly,Seat 5040JA3071A 4 314A Stopper,Compressor 4J03277A 3 315A Base Assembly,Compressor 3103JA0010C 1 315B Roller 3J02312A 2 315C Common 4J04238A 2 316A Damper,Noise 5072JA3003F 2 317A Drier Assembly 5851JA2002T 1 318A Holder,Drier 4930JA3034A 1 319A Tray,Drip 3390JA0008B 1 319C Guide,Fan 4974JA1036B 1 319D Bracket,Valve 4810JA2139A 1 323B Condenser Assembly,Wire 5403JA1044A 1 327B Damper 5040JA3063A 2

- 44 -

LOC.

Description

PTNO

Qty

NO GR-J303TS

328A Damper,Pipe 4J03020A 1

329A Fan Assembly 5901JA1014A 1

329B Fan Assembly 5901JA1007A 1 329C Fan Assembly 5901JA1013A 1

330B Shroud Assembly,Freezer 4999JA1017B 1 331D Shroud,Freezer MHN30354101 1

332B Grille Assembly,Fan 3531JA1021C 1 332C Grille Assembly,Fan 3531JA1022A 1

401A Controller Assembly 6615JB2005D 1

401B Controller Assembly 6615JB2005A 1

404A AC Motor 4680JB1036H 1

404B AC Motor 4680JB1036N 1

405A Bracket,Motor 4810JA3007B 2 405C Damper,Motor Support J756-00008B 4

406B Switch,Push Button 6600JB1005D 1 410G Capacitor,Electric Appliance Film,Radial 0CZZJB2010H 1 410H Capacitor,Electric Appliance Film,Radial J513-00012P 1

411A Power Cord Assembly 6411JB1011B 1

418A Heater,Sheath 5300JB1121D 1

418B Heater,Sheath 5300JB1085D 1

420A Motor,DC 4680JB1035H 1

501A PCB Assembly,Main 6871JB1129Q 1

501F Cover,PCB 3550JA1399C 1

501K Case,PCB 3110JA1020B 1

604E Deodorizer 4756JA3001D 2 604G Cover,Deodorizer 3550JA2143C 2

605A Roller Assembly AHJ30124501 4

610E Cover,Sensor 3550JA2035D 1

619A Valve Assembly,Pipe 5221JA1008A 1

619B Valve Assembly,Check 5221JA3002C 1

GR-J303TG/TS

- 45 -

LOC.

Description

PTNO

Qty

NO GR-J303TG GR-J303TS

128B Shelf, Freezer 5026A1 176C 1 252A Bucket, Assembly, Side Dish 5075J1024E 4 252B Bucket, Side Dish 5074JA1043C 1 252C Cover Assembly , Bucket 3551JA1052E 1 253A Bucket Assembly, Side Dish 5075JA1023E 2 253C Bucket, Side Dish 5074JA1042C 1 253C Cover Assembly , Bucket 3551JA1051E 1

P/No. 3828JD8947B JAN., 2007 Printed in Korea

LG GR-J303T Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual