Daewoo KQG-63N75S, KOG-63N7 Service Manual

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Page 1

Service Manual

Microwave Oven

Model: KQG-63N75S

DAEWOO ELECTRONICS CORP.

S/M No. : G63N75S001

http : //svc.dwe.co.kr Jan. 2004

✔Caution

: In this Manual, some parts can be changed for improving,

their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service Information Center (http://svc.dwe.co.kr).

Page 2

PRECA UTIONS T O BE OBSERVED BEFORE AND DURING SER VICING T O AVOID POSSIBLE EXPOSURE T O EXCESSIVE MICROW AVE ENERGY

(a)Do not operate or allow the oven to be operated with the door open. (b)Make the following safety checks on all ovens to be serviced before activating the magnetron or other micro-

wave source, and make repairs as necessary: (1) Interlock operation, (2) Proper door closing, (3) Seal and sealing surfaces (arcing, wear, and other damage), (4) Damage to or loosening of hinges and latches, (5) Evidence of dropping or abuse.

erating compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections.

(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation

and transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual before the oven is released to the owner.

(e) A microwave leakage check to verify compliance with the Federal performance standard should be per-

formed on each oven prior to release to the owner.

TABLE OF CONTENTS

SAFETY AND PRECAUTIONS...........................................................................................................................................2

1. FOR SAFE OPERATION ..................................................................................................................................2

2. FOR SAFE SERVICE PROCEDURES .............................................................................................................2

SPECIFICATIONS...............................................................................................................................................................3

EXTERNAL VIEW................................................................................................................................................................4

1. OUTER DIMENSION.........................................................................................................................................4

2. FEATURE DIAGRAM........................................................................................................................................4

INSTALLATION...................................................................................................................................................................5

OPERATIONS AND FUNCTIONS.......................................................................................................................................6

DISASSEMBLY AND ASSEMBLY......................................................................................................................................7

INTERLOCK MECHANISM AND ADJUSTMENT.............................................................................................................15

TROUBLE SHOOTING GUIDE .........................................................................................................................................16

MEASUREMENT AND TEST ............................................................................................................................................18

1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT ........................................................................18

2. MICROWAVE RADIATION TEST ...................................................................................................................19

3. COMPONENT TEST PROCEDURE...............................................................................................................20

WIRING DIAGRAM............................................................................................................................................................21

EXPLODED VIEW AND PARTS LIST...............................................................................................................................22

1. DOOR ASSEMBLY .........................................................................................................................................22

2. CONTROL PANEL ASSEMBLY......................................................................................................................22

3. TOTAL ASSEMBLY.........................................................................................................................................22

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SAFETY AND PRECA UTIONS

1. FOR SAFE OPERATION

Damage that allows the microwave energy (that cooks or heats the food) to escape will result in poor cooking and may cause serious bodily injury to the operator. IF ANY OF THE FOLLOWING CONDITIONS EXIST, OPERATOR MUST NOT USE THE APPLIANCE. (Only a trained service personnel should make repairs.)

(1) A broken door hinge. (2) A broken door viewing screen. (3) A broken front panel, oven cavity. (4) A loosened door lock.

(5) A broken door lock. The door gasket plate and oven cavity surface should be kept clean. No grease, soil or spatter should be allowed to build up on these surfaces or inside the oven. DO NOT ATTEMPT TO OPERATE THIS APPLIANCE WITH THE DOOR OPEN. The microwave oven has concealed switches to make sure the power is turned off when the door is opened. Do not attempt to defeat them. DO NOT ATTEMPT TO SERVICE THIS APPLIANCE UNTIL YOU HAVE READ THIS SERVICE MANUAL.

2. FOR SAFE SERVICE PROCEDURES

1. If the oven is operative prior to servicing, a microwave emission check should be performed prior to servicing the

oven.

2. If any certified oven unit is found to servicing, a microwave emission check should be performed prior to servicing the

oven.

(a) inform the manufacturer, importer or assembler,

(b) repair the unit at no cost to the owner,

(d) tell the owner of the unit not to use the unit until the oven has been brought into compliance.

3. If the oven operates with the door open, the service person should tell the user not to operate the oven and contact

the manufacturer immediately.

IMPORTANT

The wire in this mains lead coloured in accordance with the following code. Green-and-yellow : Earth

Blue : Neutral Brown : Live

As the colours of the wires in the manins lead of this appliance may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows. The wire which is coloured green-and-yellow must be connected to the terminal in the plug which is marked with the letter E , earth symbol or coloured green-and-yellow. The wire which is coloured blue must be connected to the terminal which is marked with the letter N or coloured black. The wire which is coloured brown must be connected to the terminal which is marked with the letter L or coloured red.

NOTE :

The oven is designed for counter-top use only.

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SPECIFICATIONS

POWER SUPPLY 230V/50Hz, SINGLE PHASE WITH EARTHING

POWER

MICROWAVE 1200 W

CONSUMPTION

GRILL 1050 W

COMBINATION 2200 W MICROWAVE ENERGY OUTPUT 800W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W x H x D) 465 x 279 x 360mm CAVITY DIMENSIONS (W x H x D) 290 x 208 x 306mm NET WEIGHT APPROX. 14Kg TIMER 35 min. DUAL SPEED POWER SELECTIONS 7 LEVELS CAVITY VOLUME 0.7 Cu.Ft.

* Specifications are subject to change without notice.

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EXTERNAL VIEW

1. OUTER DIMENSION

465

279

360

1. Door seal - Door seal maintains the microwave energy within the oven cavity and prevents microwave leakage.

2. Cover Heater

3. Heating Element

4. Oven cavity

5. Safety interlock system

6. Knob V.P.C - Used to select a microwave power level.

7. Knob timer - Used in setting cooking time for all functions. 8 Metal Rack

9. Coupler - This fits over the shaft in the center of the ovens cavity floor. This is to remain in the oven for all cooking.

10. Roller guide - This must always be used for cooking together with the glass cooking tray.

11. Glass cooking tray - Made of special heat resistant glass. Food in a proper receptacle is placed on this tray for cooking.

12. Door viewing screen - Allows viewing of food. The screen is designed so that light can pass through, but not the

microwave.

13. Door hook - When the door is closed, it will automatically shut off. If the door is opened while the oven is operating, the magnetron will immediately stop operating.

2. FEATURE DIAGRAM

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1. Steady, flat location

This microwave oven should be set on a steady, flat surface. This microwave oven is designed for counter top use only.

2. Leave space behind and side

All air vents should be kept a clearance. If all vents are covered during operation, the oven may overheat and, eventually, cause oven failure.

3. Away from Radio and TV sets

Poor television reception and radio interference may result if the oven is located close to a TV, Radio, antenna or feeder and so on.

4. Away from heating appliances and water taps

Keep the oven away from hot air, steam or splash when choosing a place to position it, or the insulation might be adversely affected and breakdowns occur.

5. Power supply

Check your local power source. This microwave oven requires a current of approximately 10 amperes, 230Volts, 50Hz grounded outlet. Power supply cord is about 0.8 meters long.

The voltage used must be the same as specified on this oven. Using a higher voltage may result in a fire or other accident causing oven damage. Using low voltage will cause slow cooking, We are not responsible for damage resulting from use of this oven with a voltage of ampere fuse other than those specified.

This appliance is supplied with cable of special type, which, if samaged, must be repaired with cable of same type. Such a cable can be purchased from DAEWOO and must be installed by a Qualified Person.

6. Examine the oven after unpacking for any damage such as:

A misaligned door, broken door or a dent in cavity. If any of the above are visible, DO NOT INSTALL, and notify dealer immediately.

7. Do not operate the oven if it is colder than room temperature

(This may occur during delivery in cold weather.) Allow oven to become room temperature before operating.

This appliance must be earthed. In the event of an electrical short circuit, earthing reduces the risk of the electric shock by providing an escape wire for the electric current. This appliance is equipped with a cord having a earthing wire with a earthing plug. The plug must be plugged into an outlet that is properly installed ant earthed.

INSTALLATION

W ARNING

Improper use of the earthing plug can result in a risk of electric shock. Consult a qualified electrician or serviceman if the earthing instructions are not completely understood, or if doubt exists as to whether the appliance is properly earthed, and either:If it is necessary to use an extension cord, use only a 3-wire extension cord that has a 3-blade earthing plug, and a 3-slot receptacle that will accpt the plug on the appliance. The marked rating of the extension cord should be equal to or greater than the electrical rating of the appliance, or Do not use an extension cord.

EARTHING INSTRUCTIONS

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Connect the mains lead to an electrical outlet.

After placing the food in a suitable utensil, open the oven door and put it on the glass tray. Glass tray must always be in place during cooking.

Shut the door. Make sure that it is firmly closed.

How to set each function To set MICROWAVE cooking

• Set the variable power selector to the desired power level.

To set GRILL Cooking

• Set the POWER SELECTOR to the (grill) position.

To set COMBI Cooking

• Set the POWER SELECTOR to the (combi) position.

Set the time control by turning the timer knob and then microwave cooking starts.

• If turning the timer knob for less than 2 minutes, turn it past 2 minutes and then back to the desired time.

• During the same time, the rotating angle of the timer knob of the period from 60 to 10 minute is smaller than that

of the period from 10 to 0 minute owing to the dual speed of the timer motor.

Microwave energy will be turned off automatically when the timer point to "OFF". Then take out foods.

• To prevent the oven operating with the door open, your microwave oven is fitted with safety door interlock switches. If you wish to inspect the food during the cooking time, simply open the door.

The oven will automatically stop cooking. To continue cooking, you simply close the door.

• If you wish to stop cooking during the cooking, simply turn the timer knob the point "OFF". Cooking can be reset at any time during the cooking cycle by only turning the timer knob.

• Do not let the timer continue to operate after removing food.

The safety lock prevents unwanted oven operation such as by small children. To set, pull down the side knob like the figure. To cancel, lift up the slide knob.

NOTE : When using the GRILL or COMBI mode;

• Do not open the door so often, the temperature inside the oven decrease and the cooking may not be completed in setting time.

• Never touch the oven window and metal interior of the oven when taking food in and out, because the temperature inside the oven and door is very high.

• When using these modes, be careful as the tray will be hot to touch, use oven gloves or pot holders while handling tray.

1 2

3 4

SYMBOL POWER LEVEL OUTPUT POWER

WARM 26%

DEFROST 41% 580W MEDILUM 73% 700W MED-HIGH 88%

MAX HIGH 100%

UNLOCK

LOCK

SLIDE KNOB

OPERATIONS AND FUNCTIONS

Page 8

DISASSEMBLY AND ASSEMBLY

Cautions to be observed when trouble shooting.

Unlike many other appliances, the microwave oven is high-voltage, high-current equipment. It is completely safety during normal operation. However, carelessness in servicing the oven can result in an electric shock or possible danger from a short circuit. You are asked to observe the following precautions carefully.

1. Always remove the power plug from the outlet before servicing.

2. Use an insulated screwdriver and ware rubber gloves when servicing the high voltage side.

3. Discharge the high voltage capacitor before touching any oven components or wiring.

(1) Check the grounding.

Do not operate on a 2-wire extension cord. The microwave oven is designed to be used with grounded. It is imperative, therefore, to make sure it is grounded properly before beginning repair work.

(2) Warning about the electric charge in the high voltage capacitor.

For about 30 seconds after the operation stopped and electric charge remains in the high voltage capacitor. When replacing or checking parts, short between oven chassis and the negative high terminal of the high voltage capacitor, by using a properly insulated screwdriver to discharge.

4. When the 15A fuse is blown out due to the operation of the monitor switch; replace primary interlock switch, secondary interlock switch and interlock monitor switch.

5. After repair or replacement of parts, make sure that the screws are properly tightened, and all electrical connections are tightened.

6. Do not operate without cabinet.

CAUTION : Service personnel should remove their watches whenever working close to or replacing the magnetron.

CAUTION : When servicing the appliance, need a care of touching or replacing high potential parts because of

electrical shock or exposing microwave. These parts are as follows - HV Transformer, Magnetron, HV Capacitor, HV Diode, HV fuse.

SHORT

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1. To remove cabinet

1) Remove three screws on cabinet back.

2) Push the cabinet backward.

2. To remove door assembly

1) Remove a screws which secure the stopper hinge top.

2) Remove the door assembly from top plate of cavity.

3) Reverse the above for reassembly.

NOTE : After replacing the door assembly, perform a

check of correct alignment with the hinge and cavity front plate.

3. To remove door parts.

DOOR ASSEMBLY KQG-63N75S : 3511715260

REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK

A01 3512205520 FRAME DOOR ABS SG-175 SG-0760D 1 A02 3517005620 BARRIER-SCREEN *O TEMP GLASS T3.2 MIRROR 1 A03 3515204100 STOPPER HINGE *T AS KOR-63150S 1 A04 3511706120 DOOR PAINTING AS KOR-634R0S 1 A05 3517002800 BARRIER-SCREEN *I POLYESTER T0.1 1 A06 3512300210 GASKET DOOR PP 1 A07 3513100730 HOOK POM BLACK 1 A08 3515101320 SPRING HOOK HSW-3 1 A09 7001401211 SCREW MACHINE PAN M4XL12 MFZN 2 A10 3512603240 HANDLE DOOR ABS MP-0160 1 A11 3511601500 DECORATOR LOGO AL T1.5 1 A12 3516723840 DECORATOR DOOR STS T0.5 1 A13 2TE16A27CL DOUBLE TAPE 0.16TX27MM CLEAR 550M 0.94M

✔ Caution:

In this Service Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service information Center(http://svc.dwe.co.kr)

Page 10

4. Method to reduce the gap between the door seal and the oven front surface.

(1) To reduce gap located on part A

Loosen two screws on stopper hinge top, and then

push the door to contact the door seal to oven front surface.

Tighten two screws.

(2) To reduce gap located on part

Loosen two screws on stopper hinge under, and

then push the door to contact the door seal to oven front surface.

Tighten two screws.

NOTE : A small gap may be acceptable if the microwave leakage does not exceed 4mW/cm2.

(1) Remove the gasket door from door plate. (2) Remove the door seal as from door plate. (3) Remove the door frame from door plate. (4) Remove the stopper hinge top from door plate. (5) Remove the spring and the hook. (6) Remove the barrier screen outer from door frame. (7) Reverse the above steps for reassembly.

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REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK

B01 3513407210 KNOB VPC HIPS SG-970 HG-1760H 1 B02 3511612400 DECORATOR C-PANEL STS430 T0.5 1 B03 2TE16008CL TAPE DOUBLE 0.16TX18MM CLEAR 0.5 B04 3516721340 CONTROL-PANEL ABS SG-175 SG-0760D 1 B05 4415A17352 SW MICRO VP-533A-OF SPNO #187 200G 1 B06 3512766301 HARNESS TIMER KOG-37150S 1 B07 3515101600 SPRING FLAT SUS 301 T0.5 1 B08 3517400510 COUPLER VPC KNOB POM 1 B09 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1 B10 3517400400 COUPLER TIMER POM 1 B11 3518205500 TIMER NT35MKD27E-P BROWNER ONLY 1 B12 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 2 B13 3513407200 KNOB HIPS SG-970 HG-1760H 1 B14 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1 B15 3511410200 COVER KNOB SLIDE PP 1 B16 3513703000 LEVER STOPPER POM 1 B17 3513407310 KNOB SLIDE ABS SG-175 SG-0760D 1 B18 3515101600 SPRING FLAT SUS 301 T0.5 1

5. To remove control panel parts.

1) Remove the screw which secure the control panel, push two snap fits and draw forward the control panel assembly.

2) Remove two screws which secure the timer assembly.

3) Remove the timer assembly.

4) Pull out the timer knob from timer.

5) Pull out the timer coupler from timer.

6) Remove the screw which secure the V.P.C coupler.

7) Pull out the V.P.C coupler, V.P.C knob and flat spring from the control panel.

8) Pull out the cover knob slide.

9) Remove the screw which secure the lever stopper.

10) Pull out the lever stopper, knob slide and flat spring from the control panel.

11) Reverse the above steps for reassembly.

✔ Caution:

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NOTE : Never install the magnetron without the metallic gasket plate which is packed with each magnetron to pre-

vent microwave leakage. Whenever repair work is carried out on magnetron, check the microwave leakage. It shall not exceed 4mW/cm

for a fully assembled oven with door normally closed.

6. T o remo ve high v oltage capacitor.

1) Remove a screw which secure the grounding ring

terminal of the H.V. diode and the capacitor holder.

2) Remove the H.V. diode from the capacitor holder.

3) Reverse the above steps for reassembly.

High voltage circuit wiring

7. T o remo ve magnetr on.

1) Remove a screw which secure the magnetron.

2) Remove the magnetron.

3) Reverse the above steps for reassembly.

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8. To remove wind guide assembly.

1) Remove a screw for earthing.

2) Remove the noise filter from the wind guide.

3) Remove a screw which secure the wind guide assembly.

4) Draw forward the wind guide assembly.

5) Pull the fan from the motor shaft.

6) Remove two screws which secure the motor shaded pole.

7) Remove the motor shaded pole.

8) Reverse the above steps for reasembly.

9. To remove H.V.transformer .

1) Remove four screws holding the H.V.transformer.

2) Remove the H.V.transformer.

3) Reverse the above steps for reassembly.

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10. T o remove tray motor

1) Remove the coupler in the cavity.

2) Turn the set upside down.

3) Cut the tray motor cover part from the base plate.

4) Remove the tray motor cover.

5) Remove a screw which secure the tray motor.

6) Remove the tray motor.

7) Reverse the above steps for reassembly except for securing the tray motor cover with screw.

11. To remove heater assembly

1) Remove one side of the heater harness.

2) Remove a screw which secure the cover insulator top.

3) Remove the cover insulator top.

4) Remove the heater top assembly.

5) Reverse the above steps for reassembly.

Page 15

✔ Caution:

12. T o remove heater parts

C05C04C03C01 C02

HEATER TOP ASSEMBLY : 3512803600

REF NO. PART CODE PART NAME DESCRIPTION Q TY REMARK

C01 3512765100 HARNESS HEATER KOC-970T1S TEFLON 1 C02 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 2 C03 3510607800 BRACKET HEATER *T SBHG T0.5 2 C04 3512803700 HEATER MIRACLON 115V AC 500W 2 C05 3511408100 COVER HEATER *T STS430 T0.5 1

Page 16

INTERLOCK MECHANISM AND ADJUSTMENT

The door lock mechanism is a device which has been specially designed to completely eliminate microwave radiation when the door is opened during operation, and thus to perfectly prevent the danger resulting from the leakage of microwave.

(1) Primary interlock switch

When the door is closed, the hook locks the oven door. If the door is not closed properly, the oven will not operate. When the door is closed, the hook pushes the button of the microswitch. Then the button of the primary interlock switch bring it under ON condition.

(2) Secondary interlock switch and interlock monitor switch

When the door is closed, the hook pushes the lock lever downward. The lock lever presses the button of the interlock monitor switch to bring it under NO condition and presses the button of the secondary interlock switch to bring it under ON condition.

(3) Adjustment steps

a) Loosen the one mounting screw. b) Adjust interlock switch assembly position. c) Make sure that lock lever moves smoothly after adjustment is completed. d) Tighten completely two mounting screws.

ADJUSTMENT :

Interlock monitor switch When the door is closed, the interlock monitor switch should be changed (NO condition) before other switches are closed.

When the door is opened, the interlock monitor switch should be changed (NC condition) after other switches are opened.

NOTE :

Microwave emission test should be performed after adjusting interlock mechanism. If the microwave emission exceed 4mW/cm

, readjust interlock mechanism.

Page 17

(TROUBLE 1) Oven does not operate at all ; any inputs can not be accepted.

TROUBLE SHOO TING GUIDE

Following the procedure below to chec k if the o ven is def ective or not.

1. Check grounding before trouble checking.

2. Be careful of the high voltage circuit.

3. Discharge the high voltage capacitor.

4. When checking the continuity of the switches, fuse or high voltage transformer, disconnect one lead wire from these parts and check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.

Does the fuse blow?

NONO

Does the fan motor work when you shut the door and turn the timer?

YES

If outlet has proper voltage, check continuity of power supply cord.

Replace power supply cord.

NO Continuity

Check continuity of interlock monitor switch with door shut.

Replace primary, secondary interlock switch and interlock monitor switch.

Continuity

Both continuity

Replace fuse and check continuity of both interlock switch’s contact and monitor switch’s contact with door partially open until monitor switch contact.

Replace primary, secondary interlock switch and interlock monitor switch.

Fuse again

Disconnect one side of the lead wire connected from transformer to the high voltage capacitor, and operate oven.

Replace high voltage capacitor.

Replace high voltage transformer

Normal

Page 18

Does the oven lamp light? Does the turntable turn?

YES

Continuity

Does the fan motor work when you shut the door and turn the timer?

Check the isolation of filament winding of high voltage transformer.

Replace high voltage transformer.

NO Continuity

Replace magnetron

Good

Replace or repair oven lamp, turntable motor.

If microwave do not oscillate, check continuity of filament of magnetron.

Poor continuity

NO Continuity

Check continuity filament tap (3.3V) of high voltage.

Replace high Voltage transformer

No Continuity

Continuity

Check continuity filament tap (3.3V) of high voltage.

Replace high Voltage transformer

Continuity in the reverse direction.

Replace magnetron

Normal reading should be approx. 0

Meter with 6V or higher voltage batteries should be used to check the normal direction resistance of the diode

Page 19

MEASUREMENT AND TEST

1. MEASUREMENT OF THE MICRO WAVE POWER OUTPUT

Microwave output power can be checked by indirectly measuring the temperature rise of a certain amount of water exposed to the microwave as directed below.

PROCEDURE

1. Microwave power output measurement is made with the microwave oven supplied at rated voltage and operated at its maximum microwave power setting with a load of 1000 5cc of potable water.

2. The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diameter of approximately 190 mm.

3. The oven and the empty vessel are at ambient temperature prior to the start of the test. The initial temperature of the water is 10 2

C (50 3.6 F) It is measured immediately before the water is added to the vessel. After addition of the water to the vessel, the load is immediately placed on the center of the shelf, which is in the lowest normal position.

4. Microwave power is switched on.

5. Heating time should be exactly A seconds. (Refer to table as following) Heating time is measured while the microwave generator is operating at full power. The filament heat-up time for magnetron is not included.

6. The initial and final temperature of water is selected so that the maximum difference between the ambient and final water temperature is 5K.

7. The microwave power output P in watts is calculated from the following formula :

T is difference between initial and ending temperature. t is the heating time.

The power measured should be B (

Refer to SPECIFICATIONS

)W 10.0%.

P=4187 X T/t

NOTE :

Microwave emission test should be performed after adjusting interlock mechanism. If the microwave emission exceed 4mW/cm

, readjust interlock mechanism.

Heating time for power output:

600

650

700

750

800

850

900

950

1000401050381100

A(second)

B(W)

Page 20

2. MICROWAVE RADIATION TEST

PROCEDURES

1. Prepare Microwave Energy Survey Meter, 600cc glass beaker, and glass thermometer 100

C(212 F).

2. Pour 275cc 15cc of tap water initially at 20 5

C(68 9 F) in the 600cc glass beaker with an inside diameter of approx. 95mm(3.5in.).

3. Place it at the center of the tray and set it in a cavity.

4. Close the door and operate the oven.

5. Measure the leakage by using Microwave Energy Survey Meter with dual ranges, set to 2450MHz.

1) Measured radiation leakage must not exceed the value prescribed below. Leakage for a fully assembled oven with

door normally closed must be less than 4mW/cm

2) When measuring the leakage, always use the 5cm(2in.) space cone with probe. Hold the probe perpendicular to the cabinet and door. Place the space cone of the probe on the door, cabinet, door seem, door viewing screen, the exhaust air vents and the suction air vents.

3) Measuring should be in a counter-clockwise direction at a rate of 1 in./sec. If the leakage of the cabinet door seem is

unknown, move the probe more slowly.

4) When measuring near a corner of the door, keep the probe perpendicular to the areas making sure the probe end at the base of the cone does not get closer than 2 in. from any metal. If it does not, erroneous reading may result.

WARNING

1. Make sure to check the microwave leakage before and after repair of adjustment.

2. Always start measuring of an unknown field to assure safety for operating personnel from microwave energy.

3. Do not place your hands into any suspected microwave radiation field unless the safe density level is known.

4. Care should be taken not to place the eyes in direct line with the source of microwave energy.

5. Slowly approach the unit under test until the radiometer reads an appreciable microwave leakage from the unit under the test.

Page 21

3. COMPONENT TEST PROCEDURE

High voltage is present at the high voltage terminal of the high voltage transformer during any cooking cycle. It is neither necessary nor advisable to attempt measurement of the high voltage. Before touching any oven components or wiring, always unplug the oven from its power source and discharge the

capacitor.

1. High voltage transformer

(1) Remove connections from the transformer terminals and check continuity. (2) Normal readings should be as follows:

Secondary winding...................Approx. 110

10%

Filament winding....................................Approx. 0

Primary winding.....................................Approx. 1

2. High voltage capacitor

(1) Check continuity of capacitor with meter on the highest OHM scale. (2) A normal capacitor will show continuity for a short time, and then indicate 10M once the capacitor is charged. (3) A shorted capacitor will show continuous continuity. (4) An open capacitor will show constant 10M . (5) Resistance between each terminal and chassis should be infinite.

3. High voltage diode

(1) Isolate the diode from the circuit by disconnecting the leads. (2) With the ohmmeter set on the highest resistance scale measure the resistance across the diode terminals.

Reverse the meter leads and again observe the resistance reading. Meter with 6V, 9V or higher voltage batteries should be used to check the front-back resistance of the diode, otherwise an infinite resistance may be read in both directions. A normal diode s resistance will be infinite in one direction and several hundred K

in the other direction.

4. Magnetron

For complete magnetron diagnosis, refer to Measurement of the Microwave Power Output . Continuity checks can only indicate and open filament or a shorted magnetron. To diagnose for an open filament or a shorted magnetron.

(1) Isolate magnetron from the circuit by disconnecting the leads. (2) A continuity check across magnetron filament terminals should indicate 0.1 or less. (3) A continuity check between each filament terminal and magnetron case should read open.

5. Fuse

If the fuse in the primary and monitor switch circuit is blown when the door is opened, check the primary and monitor switch before replacing the blown fuse. In case the fuse is blown by an improper switch operation, replace the defective switch and fuse at the same time. Replace just the fuse if the switches operate normally.

Page 22

WIRING DIAGRAM

Page 23

1. DOOR ASSEMBLY

Refer to Disassembly and assembly.

2. CONTROL PANEL ASSEMBLY

Refer to Disassembly and assembly.

3. TOTAL ASSEMBLY

EXPLODED VIEW AND PARTS LIST

F54

F53

F52

F51

F15

F11

F13

F12

F14

F16

C00

F44

F05 F06

F50

F49

F42 F41 F40 F39 F38 F37 F36 F35 F34 F33

F25

F24

F23

F22

F21

F04

F02 F03 F07

F09

F10

F17

F18

F20

F19

F08

F01

F48

F47

F45

F46

F27 F26F28F29F30F32 F31

F43

A00

B00

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NO. R PART CODE PART NAME DESCRIPTION SUPPLY REMARK

A00 DOOR AS Refer to Disassembly and Assembly O B00 CONTROL-PANEL AS O C00 3512803600 HEATER *T AS KOG-57350S O F01 3510805300 CABINET AS PCM O F02 7112401011 SCREW TAPPING T1 TRS 4*10 MFZN O F03 3516111900 CAVITY AS KOG-57350S O F04 7122401211 SCREW TAPPING T2S TRS 4*12 MFZN O F05 7122401211 SCREW TAPPING T2S TRS 4*12 MFZN O F06 7112401011 SCREW TAPPING T1 TRS 4*10 MFZN O F07 35113A5QJ5 CORD POWER AS 3X1.5 80X80 120-RTML 1.4M O F08 4413A90012 CLAMP POWER CORD NYLON 66 O F09 7112401011 SCREW TAPPING T1 TRS 4*10 MFZN O F10 7122401211 SCREW TAPPING T2S TRS 4*12 MFZN O F11 4414A25110 FUSE 250V 15A 65TS O

4414A25100 250V 15A MDA15 O F12 3518606100 NOISE-FILTER DWLF-M13 O F13 7121403011 SCREW TAPPING T2S PAN 4X30 MFZN O F14 3963513100 MOTOR SHADED POLE 230V 17W OEM-10DWC2-A07 O F15 3512517000 GUIDE WIND PP O F16 3511800300 FAN PP+30% GLASS O F17 R 3518002400 MAGNETRON 2M218J(F) O F18 3516004000 SPECIAL SCREW T2 BOLT FLANGE 5X12 DACRO O F19 7272400811 SCREW TAPTITE TT3 TRS 4X8 MFZN O F20 3513003200 HOLDER HV CAPACITOR SECC T0.6 O F21 R 3518302200 CAPACITOR HV 2100VAC 0.98UF #187 O F22 R 3518400400 DIODE HV HVR-1X-3AB 12KV #187 O F23 R 3518701100 FUSE HV 5KV 0.55A HV-41A55-02 O F24 R 3518113701 TRANS HV DY-N80S0-63T O F25 3516003700 SPECIAL SCREW TT3 HEX 4X8 FLG MFZN O F26 3510311700 BASE SBHG T0.7 O F27 7112401011 SCREW TAPPING T1 TRS 4*10 MFZN O F28 3512100900 FOOT PP DASF-130 O F29 7272400811 SCREW TAPTITE TT3 TRS 4X8 MFZN O F30 3515201101 STOPPER HINGE *U SCP-1 T2.5 O F31 7122401211 SCREW TAPPING T2S 4*12 MFZN O F32 R 3518570400 SWITCH S/A RELAY DWSR-1 O F33 R 4415A17352 SW MICRO VP-533A-OF SPNO #187 200G O PRIMARY F34 R 4415A66910 SW MICRO VP-531A-OF/SZM-V16-FA-61 O MONITORY F35 R 4415A17352 SW MICRO VP-533A-OF SPNO #187 200G O SECONDARY F36 3513702610 LEVER LOCK POM O F37 3513811710 LOCK POM BLACK O F38 3513601600 LAMP BL 240V 25W T25 C7A H187 O F39 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN O F40 R 3966030900 MOTOR SYNCRO 220-240V 50HZ TYJ50-8A7 O F41 3518905300 THERMOSTAT OFF:75 ON:65 H #187 NB O F42 3513003400 HOLDER THERMOSTAT PP (NATURAL) O F43 7272400811 SCREW TAPTITE TT3 TRS 4X8 MFZN O F44 4078502031 BUTTON LOCKING PP HONAM A353 O F45 3511405100 COVER WAVE GUIDE MICA T0.35 O F46 3517400620 COUPLER XAREC O

* 3512517500 GUIDE ROLLER AS KOR-63150S O F47 3514700710 ROLLER TEFLON X F48 3512517300 GUIDE ROLLER PP 5113MF6 A353B X F49 3517203600 TRAY GLASS O F50 3517206900 TRAY RACK AS KOG-37150S 110MM O F51 7112401011 SCREW TAPPING T1 TRS 4*10 MFZN O F52 3511408200 COVER INSULATOR *T SBHG T0.5 O F53 3518905900 THERMOSTAT OFF:75 ON:65 V #187 O F54 7121300611 SCREW TAPPING T2S PAN 3X6 MFZN O

✔ Caution

In this Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service Information Center (http://svc.dwe.co.kr).

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S/M NO. : G63N75S001

DAEWOO ELECTRONICS CORP.

686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC”

PRINTED DATE: Jan. 2004