Post on 16-Nov-2021
transcript
CAUTIONBEFORE SERVICING THE UNIT,READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MODEL: LRBP1031WLRBP1031NI
REFRIGERATORSERVICE MANUAL
COLOR: EURO WHITE
Ref. No.GR-349SQFGR-349STQ
http://Biz.lgservice.com
SAFETY PRECAUTIONS ....................................................................................................................................................... 2
SERVICING PRECAUTIONS.................................................................................................................................................. 3
SPECIFICATIONS................................................................................................................................................................... 4
PARTS IDENTIFICATION....................................................................................................................................................... 5
REPLACEMENT OF DOOR OPENING TYPE ....................................................................................................................... 6
DISASSEMBLY.................................................................................................................................................................... 7-8
DOOR................................................................................................................................................................................... 7
DOOR SWITCH.................................................................................................................................................................... 7
FAN AND FAN MOTOR........................................................................................................................................................ 7
DEFROST CONTROL ASSEMBLY...................................................................................................................................... 8
LAMP.................................................................................................................................................................................... 8
ADJUSTMENT................................................................................................................................................................... 9-10
COMPRESSOR.................................................................................................................................................................... 9
PTC-STARTER..................................................................................................................................................................... 9
OLP (OVERLOAD PROTECTOR) ..................................................................................................................................... 10
CIRCUIT DIAGRAM.............................................................................................................................................................. 10
TROUBLESHOOTING..................................................................................................................................................... 11-16
COMPRESSOR AND ELECTRIC COMPONENTS............................................................................................................ 11
PTC AND OLP.................................................................................................................................................................... 12
OTHER ELECTRIC COMPONENT.................................................................................................................................... 13
SERVICE DIAGNOSIS CHART.......................................................................................................................................... 14
REFRIGERATING CYCLE ............................................................................................................................................ 15-16
MICOM FUNCTION & PCB CIRCUIT EXPLANATION................................................................................................... 17-33
EXPLODED VIEW .......................................................................................................................................................... 34-35
REPLACEMENT PARTS LIST ............................................................................................................................................ 36-
Please read the following instructions before servicing yourrefrigerator.
1. Check the set for electric leakage.
2. Unplug prior to servcing to prevent electric shock.
3. Whenever testing with power on, wear rubber gloves toprevent electric shock.
4. If you use any kind of appliance, check regular current,voltage, and capacity.
5. Don't touch metal products in the freezer with wethands. This may cause frostbite.
6. Prevent water from flowing onto electric elements in themechanical parts.
7. When standing up after having checked the lowersection of the refrigerator with the upper door open,move with care to avoid hitting the upper door.
8. When tilting the set, remove any materials on the set,especially the thin plates (ex. glass shelf or books.)
9. When servicing the evaporator, wear cotton gloves.This is to prevent injuries from the sharp evaporatorfins.
10. Leave the disassembly of the refrigerating cycle to aspecialized service center. The gas inside the circuitmay pollute the environment.
SAFETY PRECAUTIONS
CONTENTS
- 2 -
Air Recharging in CompressorTest the refrigeration by connecting it electrically beforerefilling operation. It is necessary to ascertain the functionof the motor-compressor and identify the defectsimmediately. If defects have been found, empty the oldsystem of possible R134a residue by breaking off the endof the extension piece at its narrow point. (Figure 1)Replace the filter and any damaged components. Unsolderand pull off the piece remaining inside the service tube andthen attach an complete extension with male Hansen, andsolder it to the same tube again. (Figure 2)
It is necessary to execute the soldering operation withvalve open so that the fumes caused by oil residue cancome out freely without blowholes between two tubesduring the heating of the point to be soldered.The extension fitted with the male Hansen is connected tothe female fitting of the vacuum pump tube. (Figure 3)
Air evacuating from the system begins as soon as thepump starts. The refrigeration system must be kept undervacuum until the reading on the low-pressure gaugeindicates vacuum (0 absolute, -1 atm., -760 mm hg) in anycase it is advisable to keep the pump running for about 30minutes. (Figure 3)In case that a considerable leakage occurs it will benecessary to stop the vaccum pump and to add a smallquantity of Freon to the system, if vacuum should not beobtained (pressure gauge can't fall to 1 atmosphere), startthe refrigeration unit and find the leakage with the specialleak-finder. When the defective soldering point is visible,re-do it after opening the extension tube valve andreestablishing the normal outside pressure inside thegroup.Because the melted alloy is sucked into the tubes andblocks them, the pressure must be rebalanced whenvacuum is in the system in soldering. As soon as the
vacuum operation is over, add the quantity in grams ofR134a to the refrigeration system. Remember that everysystem has an exact quantity of R134a with a tolerance of±5 grams that can be added. (Figure 4)
Before performing this operation (if the vacuum pump andrefilling cylinder are connected), make sure that the valveplaced between the vacuum pump and the refilling tube areclosed in order to keep the Freon for addition to the system.(Figure 5)
In addition, check the graduated scale on the cylinder forthe quantity of R134a to be added, for example, if we have750 grams of Freon in the cylinder and must add 165grams to the group, this amount will be reached when R-134a has dropped to 585 grams, remembering that theindicator shows a lower limit of meniscus. Do this afterchoosing the scale corresponding to the gas pressuredifferent scales reported as the same gas pressureindicated by the pressure gauge on the top of the column.To make R134a flow into the system, open the valveplaced at the base of the cylinder and connected to thefilling tube. The amount of Freon cannot be added to thesystem all at once because it may cause a blocking ofthe motor-compressor. Therefore, proceed by adding theoriginal quantity of about 20-30 grams and close the valveimmediately.The pressure rises and the motor compressor must startsucking the gas and lowering the pressure again.Regulate the valve again, in the safe way until reaching thequantity of R134a established for the system beingcharged. When the system is running, the suction pressuremust be stabilized between 0.30 to 0.6 atmosphere.
POINT TO BE BROKEN CHARGE TUBE
EXTENSION
FEMALE HANSEN
MALE HANSEN
SOLDERING POINTSERVICE TUBE EXTENSION
Figure 1 Figure 2
TO THE VACUUM PUMP
PRESSURE GAUGE
Figure 3
TO THE R134a CYLINDER
TO THE REFRIGERATIONSYSTEM
Figure 4
FILLING OR CHARGE TUBE
VALVE TO BE OPENED WHEN REFILLING
VALVE TO BE CLOSED AFTER VACUUM
TO THE VACUUM PUMP
TO THE REFRIGERATIONSYSTEM
TO THE CHARGE CYLINDER
Figure 5
SERVICING PRECAUTIONS
- 3 -
1. Ref. No: GR-349****
SPECIFICATIONS
- 4 -
ITEMS SPECIFICATIONS
DIMENSIONS (mm) 595(W)X626(D)X1710(H)
NET WEIGHT (kg) 69
COOLING SYSTEM Fan Cooling
REFRIGERATOR Knob Dial
FREEZER Button
Full AutomaticDEFROSTING SYSTEM
Heater Defrost
DOOR FINISH Pre-Coated Metal
OUT CASE Painted Steel Sheet
INNER CASE ABS
INSULATION Polyurethane Foam
DEFROSTING DEVICE Heater, Sheath
REFRIGERANT R134a (150 g)
LUBRICATION OIL FREOL @ 22G (210 cc)
TEMPERATURECONTROL
ITEMS SPECIFICATIONS
Transparent Shelf (2 EA)
REFRIGERATOR Vegetable Container (2 EA)
COMPARTMENT Vegetable Container Cover (1 EA)
Chilled Container (1 EA)
Dairy Pocket Cover (1 EA)
Egg Tray (1 EA)DOOR POCKET
Little Pocket (3 EA)
Bottle Pocket (1 EA)
FREEZER Tray Drawer (4 EA)
COMPARTMENT Ice Tray (1 EA)
COMPRESSOR PTC Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Side & Wire Condenser
or Vinyl Coated Metal
NOTE : This is a basic model. The shape of refrigerator is subject to change.
PARTS IDENTIFICATION
- 5 -
Rotatable Door Basket(3)
Utility Corner(movable)
Bottle Holder
2-liter Bottle Door Basket
Leveling Screw
Egg Tray (1)
Freezer TemperatureControl
RemovableGlass Shelf (2)
Lamp
Multi-air Flow Duct
Fresh Meat Keeper
RefrigeratorTemperature Control
Vegetable DrawerUsed to keep fruits
and vegetables, etc.fresh and crisp.
Ice Cube Tray
Freezer Compartment
Removable Base
1. PRECAUTION1) Before reversing the door, you should remove food and
accessories like shelves or trays which are not fixed inthe refrigerator.
2) Use Torque Wrench or Spanner to fix or remove thebolt.
3) Don't lay the refrigerator down in working with it, it willcause a malfunction.
4) Be careful not to drop the door in disassembling orassembling the freezer or the refrigerator door.
2. HOW TO REVERSE THE DOORS1) Remove screw 2 and remove Cover 1 and move Cap
Cover 3. And, remove screw 4, Hinge-L 5, andremove pin 6. Remove the Freezer Door , and movethe position of the cap 7. Move the position of bracketdoor 8 and screw 9.
2) Remove bolt J and remove the Hinge-C K and the Fridge Door L. Move the position of the cap M. Move the position of bracket door P and screw Q.
3) Move the position of Hinge-U pin N, and Cap, Top coverO Assemble the Fridge Door L. Assemble Hinge-C Kand bolt J. Assemble F-Door . Assemble the Hinge-L5 and bolt 4. Assemble Low Cover 1 and screw 2.
REPLACEMENT OF DOOR OPENING TYPE
- 6 -
7
2
3
1
214
6
5
8
9
14
15
12
11
5
4
21
10
21
12
13
10
11
16
17
21
21
1 DOOR Freezer Door1) Loosen 2 screws and pull the Lower Cover. 2) Loosen hexagonal bolts fixing the lower hinge to the
body to remove the freezer door only.
3) Pull out the Door Gasket to remover from the Door Foam Assembly, F.
Refrigerator Door1) Loosen hexagonal bolts fixing the center hinge
(Hinge,C) to the body to remove the refrigerator dooronly.
2) Pull out the Door Gasket to remove from the Door Foam Assembly, R.
2 DOOR SWITCH1) Loosen four screws in upper part and disconnect top
cover.2) Disconnect Lead Wire from switch.3) Disengage hook behind the switch by pressing it with
hands.
3 REFRIGERATOR LAMP1) Remove the Cover Lamp by pulling with a slotted type
driver.2) Remove the lamp by turning.
Bolt
Lower Hinge
Figure 6
GASKET
Figure 7
Hinge, C
Bolt
Figure 8
Figure 9
DISASSEMBLY
- 7 -
Figure 10
4 FAN AND FAN MOTOR1) Remove freezer drawers.2) Remove two cap screws and loosen two screws in Grille Fan.3) Pull out the Grille Fan and Shroud.4) Disconnect the housing of lead wire.5) Separate the Fan Assembly.6) Losse 2 screw fixed to the Bracket.7) Pull out Shroud to remove the Fan Motor Assembly.8) Separate the Motor Bracket and Rubber.
5 DEFROST CONTROL ASSEMBLYDefrost Control Assembly consists of Thermistor and MeltingFuse. Thermistor functions to defrost automatically and it isattached to metal side of the Evaporator and senses temperature.Melting Fuse is a kind of safety device for preventing overheatingof the Heater when defrosting. At the temperature of 72°C, it stops the emission of heat from theHeater.1) Pull out the Shroud after removing the Grille.2) Separate the connector connected with the Defrost Control
Assembly and replace new one.
6 DAMPER CONTROL1) Remove the Cover Lamp and loosen 2 screw.2) Pull the Control Box and separate the lead wire housing.3) Remove the Cover Lamp.4) Separate the Insulation Multi Duct and Control Box.5) Disassemble the Knob.6) Separate the Damper Control and Control Box.7) Separate the Damper Control and Resistor.8) Disconnect the lead wire.
7 HEATER, SHEATHIn this refrigerator, Heater, Sheath is used for defrostingheater. During heating, the temperature of heater risesabout 300~500°C. Therefore, be careful not to burnyourself while servicing.1) After removing the Grille and Shroud, separate the
Heater Sheath by disconnecting the connectors.2) Exchanged Heater Sheath and connect the housing.
REFRIGERATOR ROOM LAMP
Heater Sheath
GUIDE FANFAN
SHROUDFAN MOTOR
GRILLE
Melting Fuse
Thermistor
Figure 13
Figure 14
Figure 11
Figure 12
- 8 -
1 COMPRESSOR1) Role
The compressor intakes low temperature and low pressuregas evaporated from evaporator of the refrigerator, andcondenses this gas to high temperature and high pressuregas, and then plays delivering role to Condenser.
2) CompositionThe Compressor is composed of compressorapparatus compressing gas, compressor motormoving compressor apparatus, and case protectingcompressor apparatus and motor. There are PTC-Starter, and Over Load Protector (OLP) in theCompressor outside. On the other hand, because theCompressor consists of 1/1000mm processingprecision components and is sealed after productionin absence of dust or humidity, deal and repair withcare.
3) Note for Usage(1) Be careful not to allow over-voltage and over-current.(2) Do no strike.
If applying forcible power or strike (dropping or carelessdealing), poor operation and noise may occur.
(3) Use proper electric components appropriate to thecompressor.
(4) Note to Keep Compressor dry.If compressor gets wet in the rain and rusts in the pin ofhermetic terminal, the result may be poor operationfrom poor contact.
(5) Be careful that dust, humidity, and welding flux don'tflow in the compressor inside in replacing thecompressor. Dust, humidity, and flux due to weldingwhich inflows to cylinder may cause lockage and noise.
2 PTC-STARTER
1) Composition of PTC-Starter(1) PTC (Positive Temperature Coefficient) is a no-contact
semiconductor starting device which uses ceramicmaterial. This material consists of BaTiO3.
(2) The higher the temperature is, the higher becomes theresistance value. These features are used as thestarting device for the Motor.
2) Role of PTC-Starter(1) PTC is attached to hermetic compressor used for
refrigerator, show case and starts motor.(2) Compressor for household refrigerator applies to
single-phase induction Motor.For normal operation of the single-phase inductionmotor, in the starting operation current flows in bothmain coil and sub-coil. After the starting is over, thecurrent in subcoil is cut off. The proper features of PTCplay all the above roles. So, PTC is used as a motorstarting device.
3) PTC-Applied Circuit Diagram According to Starting Method for the Motor
4) Motor Restarting and PTC Cooling(1) For restarting after power off during normal compressor
motor operation, plug the power cord after 5 min. forpressure balance of refrigerating cycle and PTCcooling.
(2) During normal operation of the Compressor Motor, PTCelements generate heat continuously. Therefore, if PTC isn't cooled for a while after the power has beenshut off, the motor can't operate again.
5) Relation of PTC-Starter and OLP(1) If the power is off during operation of compressor and
the power is on before the PTC is cooled, (instant shut-off within 2 min. or reconnect a power plug due tomisconnecting), the PTC isn't cooled and a resistancevalue grows. As a result, current can't flow to the sub-coil and the motor can't operate and the OLP operatesby flowing over current in only in the main-coil.
(2) While the OLP repeats on and off operation about 3-5times, PTC is cooled and compressor motor performsnormal operation.If OLP doesn't operate when PTC is not cooled,compressor motor is worn away and causes a shortcurcuit and fire. Therefore, use a properly fixed OLPwithout fail.
6) Note to Use PTC-Starter(1) Be careful not to allow over-voltage and over-current.(2) Do no strike.
Don't apply a forcible power or strike.(3) Keep apart from any liquid.
If liquid such as oil or water enters the PTC, PTC materials may break due to insulation breakdownof the material itself.
(4) Don't change PTC at your convenience.Don't disassemble PTC and mold. If the exterior of thePTC-starter is damaged, resistance value is altered andit may cause poor starting of the compressor motor.
(5) Use a properly repaired PTC.
PTC STARTER HERMETICTERMINAL
COMPRESSORMOTOR
C
MS M
3 6
5
S
PTC
OVERLOAD PROTECTOR(O.L.P)
RSIRFigure 19
ADJUSTMENT
- 9 -
3 OLP (OVER LOAD PROTECTOR)1) Definition of OLP(1) OLP (OVER LOAD PROTECTOR) is attached to the
hermetic compressor and protects the motor by cuttingoff current in compressor motor in case of over-risingtemperature by Bimetal in the OLP.
(2) When over-voltage flows to Compressor motor, thebimetal works by heating the heater inside the OLP, and the OLP protects motor by cutting off current whichflows to the compressor motor.
2) Role of the OLP(1) The OLP is attached to the hermetic compressor used
for the refrigerator and show case and prevents themotor coil from being started in the compressor.
(2) Do not turn the adjust screw of the OLP in any way fornormal operation of the OLP.(Composition and connection Diagram of OLP)
CIRCUIT DIAGRAM
CONTACTINGPOINT
COVER
BIMETAL
CONTACTINGPOINT
HEATER
TERMINALS
ADJUSTSCREW
HEATER
BIMETAL
Figure 20
NOTE : This is a basic diagram and specifications vary in different localities.
- 10 -
CNL
3
4
6
5
2
S
BK
PK
RD
BLBLBL
BK
BL
RUNNINGfonctionnement
BL BLBL
RD
GY
BL
BK
PR
GN/YL
RT-SENSORRT-capteur
YL
YLBL
F-SENSORF-capteur
DOOR OPEN/ouverture portièrePERCEPTION/réception
DEF-SENSORDEF-capteur
BOBOBLBLGYRD
123456
GY PR BL YL RD BN WH WHBO
BK GY BN
BK
STAR
TING
mise
en
rout
e
SHEA
TH H
EATE
Rm
anch
on c
hauf
fage
M
C
PWB ASSY, MAINGROUPE PRINCIPAL PWB
DISPLAY CONTROL P.W.Baffichage de contrôle P.W.B
1 2 3 4 5 6 7 8 9
• THE PLUG TYPE,CAPACITOR PART,COMPRESSOR EARTHPART ON CIRCUITDIAGRAM ARE SUBJECTTO CHANGE IN DIFFERENTLOCALITIES AND ACCORDANCEWITH MODEL TYPE
• WHEN STARTING CAPACITORIS NOT USED, NO.3,4 OF PTCSTART IS CONNECTEDINTERNALLY
BK:BLACKYL:YELLOWSB:SKY BLUE
BN:BROWNGN:GREENPK :PINK
RD:REDBL :BLUEGN/YL:GREEN/YELLOW
BO:BRIGHT ORANGEPR:PURPLE GY:GRAY
WH/BK:WHITE/BLACKWH:WHITE
BL YL GY BNBK9 8 7 6 5 4 3 2 1
GY PR BL YL RD BN WH WHBO1 2 3 4 5 6 7 8 9
B
AB
A MM
• Le type de prise, les pièces du condensateur, les pièces de mise à terre du compresseur sur le diagramme de circuit sont sujets à des changements dans différentes localités et selon le type de modèle.
• Quand le condensateur de mise en route n'est pas utilisé, le n˚3.4 de mise en route PTC est branché internement.
BK:noirYL:jauneSB:bleu ciel
BN:marronGN:vertPK :rose
RD:rougeBL :bleuGN/YL:vert/jaune
BO:orange brillantPR:pourpre GY:gris
WH/BK:noir/blancWH:blanc
3854JD1040E
CIRCUIT DIAGRAM/DIAGRAMME DE CIRCUITCIRCUIT DIAGRAM/DIAGRAMME DE CIRCUIT
COMPRESSORcompresseur
CAPACITOR PARTpièce condensateur
P.T.C STARTERstarter P.T.C
COMP' EARTHterre compresseur
OVER
LOA
D PR
OTEC
TOR
protec
tion c
ontre
surch
arge
DO
OR
S/W
-Rpo
rtièr
e S
/W-R
LAM
P-R
lam
pe-R
FUSE
-M(7
2C)
fusib
le-M
(72
C)
FAN
MO
TOR
mot
eur v
entil
ateu
r
COOL
ING
FAN
MOTO
Rm
oteu
r ven
tilate
ur d
ere
froidi
ssem
ent
PO
WE
R S
UP
PLY
CO
RD
Câb
le d
'alim
enta
tion
1 COMPRESSOR AND ELECTRIC COMPONENTS
TROUBLESHOOTING (Mechanical Part)
- 11 -
1
2
3
4
5
2
5
5
3
4
5
5
1
43
YES
YES
YES
NO
YES
YES
NO
NO
5
YES
NO
YES
PowerSource.
Remove the PTC-Starter from theCompressor andmeasure the voltagebetween Terminal C ofCompressor andTerminals 5 or 6 of PTC.
No Voltage.
(Rating Voltage±10%)?
Replace OLP.
Reconnect.
ReplacePTC-Starter.
Replace OLP.
O.K.
Check connectioncondition.
OLP disconnected?
Advise the customerto use a regularTransformer.
Replace Compressor.
OLP works within30 sec. in forcibleOLP operation byturning instant poweron and off.
Components start inthe voltage of RatingVoltage ±10% below.
Applied voltage isn'tin the range of RatingVoltage ±10%.
Check the resistanceamong M-C, S-C andM-S in MotorCompressor.
Check the resistance oftwo terminals in PTC-Starter.
Check if applyinga regular OLP.
Measure minimumstarting voltage after 5min. for balancing cyclepressure and cooling thePTC.
Check theresistance ofMotorCompressor.
Check theresistance ofPTC-Starter.
Check OLP.
Checkstarting state.
2 PTC AND OLP
- 12 -
YES
NO
6 5
4
3
Normal operation ofCompressor isimpossible or poor.
Separate the PTC-Starterfrom Compressor andmeasure the resistancebetween No. 5 and 6 (onlyRSIR type) or No. 4 and 5 ofPTC-Starter with a Tester orWhistone Bridge.(Figure 21)
Separate the OLP from theCompressor and check theresistance value betweentwo terminals of OLP witha Tester. (Figure 22)
Observation value is220V/50Hz : 22Ω±30%115V/60Hz : 6.8Ω±30%240V/50Hz : 33Ω±30%127, 220V/60Hz : 22Ω±30%
The resistance value is 0or serveral hundreds Ω.
The value is ∞.
Check anotherelectric components.
Replace OLP.
Check anotherelectriccomponents.
ReplacePTC-Starter.
Figure 21 Figure 22
3 OTHER ELECTRIC COMPONENTS
- 13 -
No Cooling.
Compressordoesn't run.
Running state ofcompressor is poor.
Check startingvoltage.
Check if current flows tothe followingcomponents.
a. Thermistor
b. Starting devices
c. OLP
d. Compressor coil
e. Circuit Parts
Low voltage.
Poor contacting.
Shorted or broken.
Poor contactingor shorted.
Coil shorted.
Poor contactingor shorted.
Poor contactingand broken.
Shorted.
Lack of capacity.
Coil of motorCompressor.
Replacethe compressor.
Replaceeach component.
Raise the voltage.
Replaceeach component.
Cause.
Check if current flowsto starting devices.
Check current flowingin sub-coil ofCompressor.
Check capacity of OLP.
The items describedabove are normal.
Cooling ability is poor
Fan motordoesn't run.
Much frost are stickedto the EVAPORATOR.
Poor contacting.
Coil is shorted.
Shorted.
Replacethe Heater Sheath
Replaceeach component.
Replaceeach component.
Check current flowingin DOOR SWITCH.
Check current flowing in theFAN MOTOR is stuck.
Check current flowingof the followingcomponents.• THERMISTOR• MELTING FUSE
Check current flowingof the followingcomponents. • HEATER, SHEATH
4 SERVICE DIAGNOSIS CHART
COMPLAINT POINTS TO BE CHECKED REMEDY
Cooling is • Is the power cord unplugged from the outlet? • Plug in to the outlet.impossible. • Check if the power switch is set to OFF. • Set the switch to ON.
• Check if the fuse of power switch is shorted. • Replace a regular fuse.• Measure the voltage of power outlet. • If voltage is low, wire newly.
Cooling ability • Check if the set is placed close to wall. • Place the set with the space of about 10cm.is poor. • Check if the set is placed close to stove, gas • Place the set apart from these heat
• cooker and direct rays. • appliances.• Is the ambient temperature high or • Make the ambient temperature below.• the room door closed?• Check if put in is hot. • Put in foods after cooled down.• Did you open the door of the set too often • Don't open the door too often and close• or check if the door is closed up? • it firmly.• Check if the Damper Control is set to cold-position. • Set the control to mid-position.
Foods in the • Is foods placed in cooling air outlet? • Place foods in high temperature section.Refrigerator • (Front Part)are frozen. • Check if the control is set to cold-position. • Set the control to mid-position.
• Is the ambient temperature below 5°C? • Set the control to warm-position.
Dew or ice • Is liquid food stored? • Seal up liquid foods with wrap.forms in the • Check if put in is hot. • Put in foods after cooled down.chamber of • Did you open the door of the set too • Don't open the door too often and closethe set. • often or check if the door is closed. • it firmly.
Dew forms • Check if ambient temperature and humidity • Wipe dew with a dry cloth. This occurrencein the Exterior Case. of surroumcling air are high. • is solved naturally in low temperature and humidity.
• Is something in the door holding it open? • Rearrange items to close door.
Abnormal • Are the set positioned in a firm and even place? • Adjust the adjust screw and positionnoise generates. • in the firm place.
• Are any unnecessary objects set • Remove the objects.• in the back side of the set?• Check if the Tray Drip is not firmly fixed. • Fix it firmly on the original position.• Check if the cover of mechanical room • Place the cover at the original position.• in below and front side is taken out.
To close the door • Check if the door packing is has something • Clean the door packing.is not handy. • spilled on it.
• Is the set positioned in a firm and even place? • Position in the firm place and adjust the• adjust screw.
• Is the refrigerator overloaded? • Keep foods not to reach the door.
Ice and foods • Check if the inside of the set is dirty. • Clean the inside of the set.smell unpleasant. • Did you keep aromatic foods without wrapping? • Wrap aromatic foods.
• It smells of plastic. • The new products smells of plastic, but it is• eliminated after 1-2 weeks.
In addition to the items described left, refer to the followings to solve the complaint.
Check if dew forms inthe freezer.
Replace thecomponents ofdefrosting circuit.
Check refrigeratingcycle.
Check the damper control
Defrostingis poor.
The cycleis faulty.
Repair the cycle.
Replace the damper control
The operation ofthe dampercontrol is poor.
- 14 -
5 REFRIGERATING CYCLE
Troubleshooting Chart
Leakage Detection
Observe discharging point of refrigerant which may be in the oil discharging part in the compressor and hole of evaporator.
- 15 -
YES
YES
Whether compressorruns or not.
Whether frostforms or not inevaporator.
Observe the dischargedamount of refrigerant.
Inject refrigerant to compressorand check cooling operation.
Clogged by dust. Gas leakage.
Faultycompressor.
Moisture clog.
Whether oilleaks or not.
Frost formed normally
Normal amount
No or much amount
(Check the leakage point)Frost formed normally
No frostor formsin inlet only
Check compressor
PARTIAL Freezer room and Low flowing sound of A little high • A little refrigerantLEAKAGE refrigerator refrigerant is heard and more than • discharges.
don't cool frost forms in inlet only ambient • Normal cooling is possiblenormally. temperature. • when injecting of refrigerant
• the regular amount.
WHOLE Freezer and Flowing sound of refrigerant Equal to ambient • No discharging of refrigerant.LEAKAGE refrigerator is not heard and frost isn't temperature. • Normal cooling is possible
don't cool formed. • when injecting of refrigerantnormally. • the regular amount.
PARTIAL Freeze room and Flowing sound of refrigerant A little high • Normal discharging ofCLOG refrigerator is heard and frost forms more than • refrigerant.
don't cool in inlet only. ambient • The capillary tube is faulty.normally. temperature.
WHOLE Freezer and Flowing sound of refrigerant Equal to ambient • Normal discharging ofCLOG refrigerator is not heard and frost isn't temperature. • Refrigerant.
don't cool. formed.
MOISTURE Cooling operation Flowing sound of refrigerant Lower than • Cooling operation restartsCLOG stops periodically. is not heard and frost melts. ambient • when heating the inlet of
temperature • capillary tube.
COMP- Freezer and Low flowing sound of A little higher • The pressure of highRESSION refrigerator refrigerant is heard and than ambient • pressure part in
don't cool. frost forms in inlet only. temperature. • compressor is low.
NO COMP- No compressing Flowing sound of refrigerant Equal to ambient • No pressure of high pressureRESSION operation. is not heard and no frost. temperature. • part in the compressor.
CAUSETEMPERATURE
OF THECOMPRESSOR
REMARKSSTATE OFTHE SET
STATE OF THEEVAPORATOR
LEA
KA
GE
CLO
GG
ED
BY
DU
ST
DE
FE
CT
IVE
CO
MP
RE
SS
ION
NO. ITEMS CONTENTS AND SPECIFICATIONS REMARKS
WELDING (1) H 30ROD (1) • Chemical Ingredients • Recommend H34 containing 34% Ag in the
(1) • Ag: 30%, Cu: 27%, Zn: 23%, Cd: 20% • Service Center.(1) • Brazing Temperature: 710~840°C(2) Bcup-2(1) • Chemical Ingredients(1) • Cu: About 93%(1) • P: 6.8~7.5%(1) • The rest: within 0.2%(1) • Brazing Temperature: 735~840°C
FLUX (1) • Ingredients and how to make • Make amount for only one day. (1 )(1) ••Borax 30% • Holding period: 1 day(1) ••Borax 35% • Close the cover of container to prevent dust(1) • Fluoridation kalium: 35% • putting in the FLUX.(1) • Water: 4% • Keep it in a stainless steel container.(1) • Mix the above ingredients and boil until(1) • they are transformed into liquid.
DRIER (1) Assemble the drier within 30min. • Don't keep the drier outdoors becauseASSEMBLY (1) after unpacking. • humidity damages to it.
(2) Keep the unpacked drier at the temperatureof 80~100°C.
VACUUM (1) When measuring with pirant Vacuum • Apply M/C Vacuum Gauge without fail.(1 )gauge the charging M/C, vacuum • Perform vacuum operation until a proper(1 )degree is within 1 Torr. • vacuum degree is built up.(2) If the vacuum degree of the cycle inside is • If a proper vacuum degree isn't built up,• (2) 10 Torr. below for low pressure and 20 Torr. • check the leakage from(2) for high pressure, it says no vacuum • the Cycle Pipe line part and(2) leakage state. • Quick Coupler Connecting part.(3) Vacuum degree of vacuum pump must be(3) 0.05 Torr. below after 5 min.(4) Vacuum degree must be same to the
value described item (2) above for more than 20 min.
(1) The pressure of dry air must be morethan 12~16kg/cm2
(2) Temperature must be between-20~and 70°C.
(3) Keep the pressure at 12~6kg/cm2 also(3) when substituting dry air for Nitrogen Gas.
NIPPLE (1) Check if gas leaks with soapy water. • Check if gas leaks from joint of theAND (2) Replace Quick Coupler in case of leakage. • Coupler.COUPLER
PIPE (1)• Put all Joint Pipes in a clean box and (1)• cover tightly with the lid so that dust or(1)• humidity is not inserted.
1
2
3
4
5
6
7
DRY ANDAIRNITROGENGAS
General Control of Refrigerating Cycle
- 16 -
NOTCH
TEMP(˚C)
ROOM
Min Min/Mid
Mid Mid/Max
Max
-15 -16.5 -18 -19.5
FREEZER
VACATION FREEZE TEMP QUICK FREEZE
-22
This description is made for GR-349 & 389. Please refer to overall PCB circuits for other models.
1 FUNCTION EXPOSITION
1) FUNCTION(1) The refrigerator starts from optimum condition when electric power is first on. The operation condition changes
Mid Mid/Max Max Min Min/Mid Mid whenever you press the FREEZE TEMP button.
(2) It returns to Mid conditions if power off and on again.
MICOM FUNCTION & PCB CIRCUIT EXPLANATION
- 17 -
2) QUICK FREEZER(1) This raises the freezing speed by operating the compressor continuously. Press the QUICK FREEZE button and
the QUICK FREEZE LED is displayed. Then after 3 hours' successive operation of compressor operation, the QUICKFREEZING function will be released.
(2) Defrosting during the QUICK FREEZING operates as follows!When the QUICK FREEZING time is below 90 minutes, defrost and then operate the QUICK FREEZING for theremaining time. When the QUICK FREEZING time is over 90 minutes, defrost and then operate the QUICK FREEZINGfor 2 hours
(3) If QUICK FREEZE button is pressed during defrosting, the QUICK FREEZE LED is lit. The QUICK FREEZING operatesfor 3 hours after 7 minutes from the end of defrosting.
(4) If VACATION button is pressed during the QUICK FREEZING, the QUICK FREEZING LED function is released.
(5) If power is interrupted during QUICK FREEZING, the QUICK FREEZING function is released.
3) VACATION FUNCTION(1) Function for Energy Saving. Press the VACATION button, and the VACATION LED is displayed and this function is
operated.
(2) Freezer Compartment is not kept by compressor at the notch displayed but at -13°C± differential.
(3) Defrosting and fan control are same as normal operation.
(4) If QUICK FREEZE button is pressed during the VACATION FUNCTION, VACATION FUNCTION is released.
(5) If power is interrupted during VACATION FUNCTION, the VACATION FUNCTION is released.
4) DOOR OPENING ALARM
(1) When the REFRIGERATOR DOOR is opened and isn't closed after 1 minute, the BUZZER sounds.
(2) At frist, BUZZER sounds three times at each intervals of 0.5 second, then makes a 0.5 second ON/OFF alarm threetimes at intervals of 30 seconds.
(3) If the REFRIGERATOR door closed during ALARM, the ALARM cancels.
5) DISPLAY BUTTON RING(1) If display function button (FREEZE TEMP, QUICK FREEZE, VACATION) of the front of the TOP COVER is pushed,
BUZZER rings with DING~ DONG~ (See the BUZZER OPERATION CHECK p.22)
6) DEFROSTING(1) If the accumulated time for the operation of the COMPRESSOR is 7 hours, the DEFROSTING HEATER is started.
(2) The first defrosting is performed 4 hours (compressor ON) later since the power is on.
(3) If DEFROST SENSOR is over 7 °C during DEFROSTING, end the operation of DEFROSTING with DEFROSTINGHEATER paused, and after 7 minutes, the operation for the freezing is started.If DEFROST SENSOR is not reach to 7 °C after 2 hours' operation of the defrosting heater, it indicates a defrostingtrouble. (See the TROUBLE REPRESENTING FUNCTION)
(4) If DEFROST SENSOR is short or open, defrosting is not performed.
7) ORDERLY OPERATION OF ELECTRIC PARTSTo avoid NOISE and DAMAGE, the items containing an electric parts such as compressor, DEFROSTING HEATER, andFAN MOTOR operate in order as follows.
- 18 -
CLOSE OPEN CLOSE OPEN CLOSE
BUZZER
within1 minute
1 minute 30seconds
30seconds
threetimes
threetimes
threetimes
FREEZERDOOR
OPERATION STATE OPERATION ORDER
WHEN DEFROST SENSORTEMPERATURE IS OVER7°C. (WHEN PURCHASING OR MOVING)
WHEN DEFROST SENSOR TEMPERATURE IS BELOW7°C. (WHEN POWER FAILURE OR SERVICING)
WHEN RETURNING TO NORMALSTATE FROM TEST MODE
POWER COMP FANON ON ON
after 0.5 sec. after 0.5 sec.
All Elec. Parts COMP FANOFF ON ON
after 7 min . after 0.5 sec.
POWER DEFROSTING DEFROSTINGON HEATER ON HEATER ON
after 0.5 sec. after 10 sec.
COMP FANON ON
after 0.5 sec. after 0.5 sec.
WH
EN
PL
UG
GE
D A
T F
IRS
T
8) SELF-TEST(1) Function to make service easy in case of occuring a trouble in the product.
(2) When a trouble occurs, the button is pushed, but the function doesn't operate.
(3) If a problem releases during the representation of trouble, a refrigerator performs the normal function (RESET).
(4) Error codes are displayed by FREEZE TEMP LEDs on TOP COVER. If ERROR occurs, the other LEDs except ERRORCODE LEDs are all off.
ERROR CODE LEDs THIS IS WHAT HAPPENS!NO. ITEMS
F1 F2 F3 F4DESCRIPTION
COMP FAN DEFROST HEATER
1 FREEZER FREEZER SENSOR open SENSOR abnormal or short.
O O
2 DEFROST DEFROST SENSOR open SENSOR abnormal or short.
O O No defrosting
3 DEFROSTING DEFROST HEATER, FUNCTION TEMP. FUSE open oris abnormal disconnection (Displayed
after at least 4 hours O O O
from the trouble'soccurring.)
4 RT-SENSOR NOTE 1) Room Temperatureabnormal SENSOR open or short
O O O
- 19 -
VACATION FREEZE TEMP QUICK FREEZE
F1
ERROR CODE LEDs
F2 F3 F4
15 minutes On/15 minutes Off
* NOTE 1) Press the QUICK FREEZE and FREEZE TEMP buttons together in normal operation, get this result.
If normal, LEDs on the TOP COVER is all on. If abnormal, LEDs are all on except VACATION LED.
RT-SENSOR
:ONO : OPERATE NORMAL
:OFF
9) FUNCTION TEST(1) Function to check the testing function of PCB and refrigerator and to find where the trouble.
(2) The test switch is on the MAIN PCB of refrigerator.TEST FUNCTION is released and RESET after MAX. 2 hours, regardless of TEST MODE.
(3) If the buttons on TOP COVER is pushed during TEST MODE, Function is not operated and only BUZZER ring withDING~ DONG~
(4) After the end of TEST MODE, pull out the power cord and plug it in again (RESET).
(5) If a ERROR occurs during the TEST MODE, TEST FUNCTION is released and DISPLAY LEDs represent ERRORCODE.
(6) If the TEST swithch is pushed during ERROR CODE, TEST FUNCTION is not operated.
MODE OPERATION CONTENTS REMARKS
TEST 1 Press TEST button 1. COMPRESSOR OPERATES CONTINOUSLY.once. 2. FAN OPERATES CONTINOUSLY.
3. DEFROSTING HEATER OFF4. ALL DISPLAY LEDS ON.
TEST 2 Press TEST button 1. COMPRESSOR OFF. If DEFROST HEATER once in the state of 2. FAN OFF. is over 7°C, it returns TEST MODE 1. 3. DEFROST HEATER ON. to the NORMAL STATE.
4. ALL THE DISPLAY LEDS OFF EXCEPT QUICK FREEZE AND VACATION LEDS.
NORMAL Press TEST button Return to the initial condition. Compressor starts STATE once in the state of (RESET) after 7 minutes.
TEST MODE 2.
- 20 -
• LED Check Function : Press the QUICK FREEZE and FREEZE TEMP buttons at the same time. After 1 sec., all theLEDs of the DISPLAY are ON simultaneously. Release the BUTTON to return to the previouscondition.
2 FUNCTION DESCRIPTION
1) ELECTRIC CIRCUITS
TRANS secondary side is composed of electric power circuits for RELAY driving electricity (12Vdc) and for supplyingelectricity to MICOM and IC (5Vdc). The voltage in each part is as follows.
VA1 is the part to protect over voltage and noise. When more than 385V is applied, the thermal-fuse (130°C cut-off, localoption) in a first part of TRANS is cut so that the elements in the secondary side of TRANS are protected.
2) OSCILLATION CIRCUIT
CIRCUIT for CLOCK which motivates the internal local element of IC1 to transmit and receive information and BASIC TIMEfor calculating time. Use a proper form for OSC 1. In the event that SPECIFICATION is changed, the calculated time in IC1is changed or IC1 isn't able to operate.
3) RESET CIRCUIT
All the internal parts of MICOM (IC1) return to the initial condition at power ON in MICOM after temporary power failure. As a result, all the functions operate acording to the early condition. At the early period of power ON the LOW voltage isapplied in the RESET terminal of MICOM for the fixed time. The RESET terminal is 5 V during the general operation.
- 21 -
PARTS both ends of VA1 both ends of CM1 both ends of CM2 both ends of CE2 both ends of CC2
VOLTAGE 230Vac 14Vac 17Vdc 12Vdc 5Vdc
4) LOAD/BUZZER OPERATION, DOOR OPENING SENSING CIRCUIT(1) LOAD OPERATION CHECK
ƒUIf the DOOR-R is opened during FAN MOTOR is operated, FAN MOTOR is stopped immediately.ƒUThe A , B of DOOR S/W-R is connected DOOR OPEN DETECTION CIRCUIT as follow.ƒUIf the DOOR-R is opened or closed, then the DOOR S/W-R is ON/OFF, and the LAMP-R is ON/OFF,
and at the same time, S/W of the A , B of DOOR S/W-R for detection of DOOR-R open is ON/OFF.
(2) DOOR OPENING PERCEPTION CHECK
*NOTICE: If you change DOOR S/W-R, you must use a component of the right PART NUMBER. There is a similar typeDOOR S/W-R of NOT MICOM MODEL, and its logic of the A , B of DOOR S/W-R is reversed.
ƒUEven though LAMP-R is operated a normal ON/OFF according to DOOR S/W-R, the MICOM can't detect a DOOR-R opened or closed of lead wire of the A , B is abnormal or S/W of the A , B of DOOR S/W-R is abnormal.
ƒUWhen DOOR-R open isn't detected : Even though DOOR-R is opened, FAN MOTOR couldn't stop.When DOOR-R close isn't detected : Even though DOOR-R is closed, BUZZER sounds a DOOR OPEN ALARM.check a lead wire of the A , B and DOOR S/W-R.
- 22 -
KIND OF LOADCOMPRESSOR,
FAN MOTOR DEFROSTING HEATERCOMPRESSOR COOLING FAN
MEASURING POINT (IC5) No.13 No.14 No.15
ON below 1VSTATE
OFF 12V
MEASURING POINTNO.6 OF IC 1 (MICOM)
REFRIGERATOR DOOR
CLOSE 5V(S/W of A , B is OFF state)
OPEN 0V(S/W of A , B is ON state)
(3) BUZZER OPERATION CHECK
- 23 -
DISPLAY FUNCTION BUTTON RING DOOR OPEN ALARM(DING~ DONG~) (SCREECHING)
OFF
IC1 (No.14 Pin) ov
IC1 (No.13 Pin) ov
MEASURINGPOINT
CONDITIONS
0.05s 0.2s 0.1s 1s
0V
5V
0V
5V
0V
5V
0V
5V
0.5s 0.5s
2.66khz (DING~) 2.232khz (DONG~) 3.1khz OFF
5) TEMP SENSOR CIRCUITS
The above circuit reads the surrounding temperature, DEFROSTING temperature, and FREEZER ROOM temperature intoMICOM (IC1). OPEN or SHORT state of each SENSOR is as follows.
6) SWITCH INPUT CIRCUITThe following circuit is a test switch input circuit for checking the refrigerator.
- 24 -
(RT– SENSOR)
(DEFROST SENSOR)
(FREEZER COMPARTMENT SENSOR)
SENSOR CHECK POINT NORMAL (-30 °C~50 °C) SHORT OPEN
ROOM TEMPERATURE SENSOR
POINT A Voltage
DEFROST SENSOR POINT B Voltage 0.5 V ~ 4.5 V 0 V 5 V
FREEZER SENSOR POINT C Voltage
7) TEMPERATURE COMPENSATION
• TEMPERATURE COMPENSATION TABLE by adjusting resistance values. (the temperature difference compared to thepresent temp.)
eg) If the compensation resistance of freezer compartment is changed from 10K (present resistance) to 18K (revisedresistance), the temperature of freezer compartment goes up by +2°C.
- 25 -
FREEZER TEMPERATURE COMPENSATION
FREEZER ROOM
RESISTANCE VALUES(R1) TEMPERATURE COMPENSATION REMARKS
180 kΩ + 5.0°C COMPENSATE WARMLY
56 kΩ +4.0°C
33 kΩ +3.0°C
18 kΩ +2.0°C
12 kΩ +1.0°C
10 kΩ 0°C STANDARD
8.2 kΩ -1.0°C
5.6 kΩ -2.0°C
3.3 kΩ -3.0°C
2 kΩ -4.0°C
470 Ω -5.0°C COMPENSATE COOLLY
• TEMPERATURE COMPENSATION OF FREEZER ROOM
• This circuit is aimed to input the necessary temperature compensation values into the MICOM in order to adjust the freezertemperature which is different in each model.
- 26 -
Revised resistance470 Ω 2 kΩ 3.3 kΩ 5.6 kΩ 8.2 kΩ 10 kΩ 12 kΩ 18 kΩ 33kΩ 56 kΩ 180 kΩ
Present resistance
NOT1 °C↑ 2 °C↑ 3 °C↑ 4 °C↑ 5 °C↑ 6 °C↑ 7 °C↑ 8 °C↑ 9 °C↑ 10 °C↑
470 Ω COMPENSATE
1 °C↓NOT
1 °C↑ 2 °C↑ 3 °C↑ 4 °C↑ 5 °C↑ 6 °C↑ 7 °C↑ 8 °C↑ 9 °C↑2k Ω COMPENSATE
2 °C↓ 1 °C↓NOT
1 °C↑ 2 °C↑ 3 °C↑ 4 °C↑ 5 °C↑ 6 °C↑ 7 °C↑ 8 °C↑3.3 kΩ COMPENSATE
3 °C↓ 2 °C↓ 1 °C↓NOT
1 °C↑ 2 °C↑ 3 °C↑ 4 °C↑ 5 °C↑ 6 °C↑ 7 °C↑5.6 kΩ COMPENSATE
4 °C↓ 3 °C↓ 2 °C↓ 1 °C↓NOT
1 °C↑ 2 °C↑ 3 °C↑ 4 °C↑ 5 °C↑ 6 °C↑8.2 kΩ COMPENSATE
FREEZER5 °C↓ 4 °C↓ 3 °C↓ 2 °C↓ 1 °C↓
NOT1 °C↑ 2 °C↑ 3 °C↑ 4 °C↑ 5 °C↑
ROOM 10 kΩ COMPENSATE
(R1)6 °C↓ 5 °C↓ 4 °C↓ 3 °C↓ 2 °C↓ 1 °C↓
NOT1 °C↑ 2 °C↑ 3 °C↑ 4 °C↑
12 kΩ COMPENSATE
7 °C↓ 6 °C↓ 5 °C↓ 4 °C↓ 3 °C↓ 2 °C↓ 1 °C↓NOT
1 °C↑ 2 °C↑ 3 °C↑18 kΩ COMPENSATE
8 °C↓ 7 °C↓ 6 °C↓ 5 °C↓ 4 °C↓ 3 °C↓ 2 °C↓ 1 °C↓NOT
1 °C↑ 2 °C↑33 kΩ COMPENSATE
9 °C↓ 8 °C↓ 7 °C↓ 6 °C↓ 5 °C↓ 4 °C↓ 3 °C↓ 2 °C↓ 1 °C↓NOT
1 °C↑56 kΩ COMPENSATE
10 °C↓ 9 °C↓ 8 °C↓ 7 °C↓ 6 °C↓ 5 °C↓ 4 °C↓ 3 °C↓ 2 °C↓ 1 °C↓NOT
180 kΩ COMPENSATE
8) LIGHTING CIRCUITS OF KEY BUTTON INPUT AND DISPLAY PARTS
The above circuit is to judge the operation conditions of function key and to light each function indicating LED. It is operatedby SCAN method.
- 27 -
FREEZER TEMPCONTROL KEY
DISPLAY PART
3. SENSOR RESISTANCE CHARACTERISTICS TABLE
• The tolerance of sensor resistance is ±5%.
• Be sure to measure the sensor resistance after keeping the sensor more than 3 minutes at a measuring temperature. (It needs delay due to sensor speed.)
• Measure the resistances of SENSORs with a digital tester after disconnecting CON 4 of MAIN PWB ASSY.
- 28 -
MEASURED TEMPERATURE RESISTANCE OF FREEZER SENSOR RESISTANCE OF DEFROST SENSOR, ROOM TEMPERATURE SENSOR
-20°C 22.3kΩ 77kΩ
-15°C 16.9kΩ 60kΩ
-10°C 13.0kΩ 47.3kΩ
-5°C 10.1kΩ 38.4kΩ
0°C 7.8kΩ 30kΩ
+5°C 6.2kΩ 24.1kΩ
+10°C 4.9kΩ 19.5kΩ
+15°C 3.9kΩ 15.9kΩ
+20°C 3.1kΩ 13kΩ
+25°C 2.5kΩ 11kΩ
+30°C 2.0kΩ 8.9kΩ
+40°C 1.4kΩ 6.2kΩ
+50°C 0.8kΩ 4.3kΩ
4. MAIN PWB ASSEMBLY AND PARTS LIST
1) MAIN PWB ASSEMBLY
- 29 -
DIP
CE1
+
CM1
CM2
+
+
CE2
CE6
CE3
+J06 J07
J01
+
IC3
CC1 CC2
CE4
+CE5
D5
OP2
R21
OP1
R20
CC4
R6
CC10
R19
J05J10
J11
J02 R7 J04 RF3
R10
R1
CC8
CC7
R16
R15
R17
RF2
RF1
TEST
R13
R12
R11
IC4
J09
IC1
CC3
J08
6871JB1037
STICKER
J12
Q1
J13
Q2
J14
Q3
R14
CC6
CC5
OSC1R8
R9
CC9
1
D
6
R-DOOR F
CON3
RT-SENSOR9 1
CON2
98 12
COMP F-FAN D-HEATER
CON1VA1
RY2 RY3RY1
D8
D7
J15
D6R4 R18 R3
BUZZER
Q4
IC6
TRANS
D1 D3 D4 D2
IC2
2) REPLACEMENT PARTS LIST
- 30 -
3) PWB ASSEMBLY, DISPLAY AND PARTS LIST
- 31 -
5. PWB circuit drawing- The PWB circuit drawing may change without notice.
- 32 -
- 33 -
1.Ref. No : GR-349****
EXPLODED VIEW & REPLACEMENT PARTS LIST
- 34 -
103A
103B
503B
406B
114A
102B
109C
102A
120D
120B120E
501A
120C 120A
282B
283B
104C
106B
104A
109A
109B
103C
301A
418A
401A
104C
106B
104A
315A
315B315C
315B315C
319A 319C
328A327A
420A329C
323B
310A
308A
309A314A
312A
317A
307A
318A
105A
304A
411A
404A405A
329A
332A
409B
330B
405C
281B
281F
610E
108A
604F
120H
- 35 -
249A
136E
136F
155A
140A
151A
151B
241A
235A
249C241A
237A
241C
136A
125A
136B
136C
136D
233A231A
210A
210A
249B
230A
203A201A
200A
281D
P/No. 3828JD8351K JUN., 2001 Printed in Korea