Service Manual

S/M No. :

OM9P25BS001

Service Manual

Microwave Oven

Model: KOM-9P25BS

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).

May. 2012

PRECAUTIONS TO BE OBSERVED BEFORE AND

DURING SERVICING TO AVOID POSSIBLE

EXPOSURE TO EXCESSIVE MICROWAVE 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 microwave 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.

(c) Before turning on microwave power for any service test or inspection within the microwave gen-erating compartments, check the magnetron, wave guide or transmission line, and cavity for proper align-ment, 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 performed on each oven prior to release to the owner.

TABLE OF CONTENTS

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE

EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ......................................................................................................1

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. FEATURES DIAGRAM......................................................................................................................................5

INSTALLATION ...................................................................................................................................................................6

OPERATIONS AND FUNCTIONS.......................................................................................................................................7

DISASSEMBLY AND ASSEMBLY......................................................................................................................................8

INTERLOCK MECHANISM AND ADJUSTMENT.............................................................................................................16

TROUBLESHOOTING GUIDE ..........................................................................................................................................17

MEASUREMENT AND TEST ............................................................................................................................................19

1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT ........................................................................19

2. MICROWAVE RADIATION TEST ...................................................................................................................20

3. COMPONENT TEST PROCEDURE ...............................................................................................................21

WIRING DIAGRAM............................................................................................................................................................22

EXPLODED VIEW AND PARTS LIST...............................................................................................................................23

1. DOOR ASSEMBLY .........................................................................................................................................23

2. CONTROL PANEL ASSEMBLY......................................................................................................................23

3. GUIDE WIND ASSEMBLY ..............................................................................................................................23

4. TOTAL ASSEMBLY.........................................................................................................................................23

1

SAFETY AND PRECAUTIONS

CAUTION

This device is to be Serviced only by Properly Qualified Service Personel. Consult the Service Manual for Proper

Service Procedures to Assure Continued Safety Operation and for Precautions to be Taken to Avoid Possible

Exposure to Excessive Microwave Energy.

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,

(c) attempt to ascertain the cause of the excessive leakage,

(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 and CDRH immediately.

CAUTION

MICROWAVE RADIATION

PERSONNEL SHOULD NOT BE EXPOSED TO THE MICROWAVE ENERGY WHICH MAY RADIATE FROM

THE MAGNETRON OR OTHER MICROWAVE GENERATING DEVICE IF IT IS IMPROPERLY USED OR

CONNECTED. ALL INPUT AND OUTPUT MICROWAVE CONNECTIONS. WAVEGUIDE FLANGES AND

PASKETS MUST BE SECURE. NEVER OPERATE THE DEVICE WITHOUT A MICROWAVE ENERGY

ABSORBING LOAD ATTACHED. NEVER LOOK INTO AN OPEN SAVEGUIDE OR ANTENNA WHILE THE

DEVICE IS ENERGIZED.

2

SPECIFICATIONS

POWER SUPPLY

MICROWAVE

INPUT POWER

ENERGY OUTPUT

FREQUENCY

OUTSIDE DIMENSIONS (W H D)

CAVITY DIMENSIONS (W H D)

CAVITY VOLUME

NET WEIGHT

TIMER

POWER SELECTIONS

* Specifications are subject to change without notice.

240V AC, 50Hz SINGLE PHASE WITH GROUNDING

1600 W

1100 W

2,450MHz

542 x 329 x 461 mm

350 x 230 x 357 mm

29 L

APPROX. 18 Kg

10min. SINGLE SPEED.

5 Levels

3

EXTERNAL VIEW

1. OUTER DIMENSION

542 461

4

2. FEATURES DIAGRAM

3 5 4 7 0 1

8

9

2 6

1

Safety Interlock System.

2

Door Viewing Screen - Allows viewing of food.

The screen is designed so that light can pass through, but not the microwave.

3

Door Hook - When door is closed, it will auto-

matically shut off. If the door is opened while the oven is operating, magnetron will immediately stop operating.

4

Oven Cavity.

5

Door Seal - Door seal maintains the

microwave energy within the oven cavity and prevents microwave leakage.

6

Plate Tray - Made of special heat resistant

GLASS. Food in a proper receptacle is placed on this plate for cooking.

7

Stirrer Cover - This is located on the ceiling

with the stirrer fan.

8

Knob V.P.C - Used to select a microwave

power level.

9

Knob timer - Used in setting cooking time for

all functions.

0

Inlet cover - Protect the air hole from splashes

of cooking foods.

5

INSTALLATION

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 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. Position the oven as far from them as possible.

4. Away from heating appliances and water taps

Keep the oven away from hot air, steam and 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 7 amperes, 230-240 Volts, 50 Hz.

• Power supply cord is about 1.0 meters long.

• Used the voltage 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 damaged, 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 the oven to become room temperature before operating.

EARTHING INSTRUCTIONS

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 plug. The plug must be plugged into an outlet that is properly installed and earthed.

WARNING

Improper use of the earthing plug can result in a risk of electric shock. Consult a qualified electrician or service-man 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 accept 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.

6

OPERATIONS AND FUNCTIONS

1. Connect the mains lead to an electrical outlet.

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

3. Close the door securely.

4. Choose cooking power level by setting V.P.C knob to the desired position. Refer to cookbook for recommended power levels.

5. Determine cooking time. Consult cookbook for recipe timing.

Oven light turns on and cooling fan starts to operate. Microwave cooking starts.

6. You may open the door while the oven is operating. As soon as the door is opened, the safety mechanisms stop the generation of microwave power and the operation of cooking timer.

If you wish to change the time during cooking, simply adjust the timer to the desired time.

7. When the timer reaches zero, a bell will ring and the unit will turn off. Oven light turns off. If additional cooking time is needed and the door is closed, the oven will automatically start when the timer is reset.

Make sure the oven is properly installed and plugged into the electrical outlet.

NOTE

• Various clicking noises may be heard when turning V.P.C knob. This is normal and does not affect the operation of your microwave oven.

0

1

10 min

2

9 3

8

4

7

6

5

Variable power cooking

ON and OFF cycle time of mechanical V.P.C switch is 30 seconds.

When the V.P.C knob is set to the desired position and timer knob to the desired position, the V.P.C switch has a cycle (ON/OFF time(sec.)) listed below.

POWER LEVEL

LOW

OUTPUT POWER

17%

DEFROST 33%

MEDIUM 55%

MED. HIGH

HIGH

77%

100%

7

DISASSEMBLY AND ASSEMBLY

Cautions to be observed when troubleshooting.

Unlike many other appliances, the microwave oven is high-voltage, high-current equipment.

It is completely safe 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 two-wire extension cord.

The microwave oven is designed to be used while earthed.

It is imperative, therefore, to make sure it is earthed 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 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.

SHORT

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

WARNING : 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.

8

1. To remove cabinet

1) Remove four screws on cabinet back.

2) Pull the cabinet backward.

2. To remove door assembly

1) Remove three 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.

9

3. To remove door parts.

A05

A05-2 A05-3 A05-1

A06 A09 A01 A10 A02

DOOR ASSEMBLY :

3511731000

A07 A08 A04 A03

REF No.

A04

A05

A06

A07

A00

A01

A02

A03

A08

A09

A10

PART CODE

3511731000

3511714800

3511714700

3513101200

3515102300

3511731200

3517007120

3512604340

7001401011

3515204900

3512302410

PART NAME

DOOR AS

DOOR PAINTING AS

DOOR SEAL AS

HOOK

SPRING HOOK

DOOR SUB AS

BARRIER-SCREEN *O

HANDLE DOOR

SCREW MACHINE

STOPPER HINGE *T AS

GASKET DOOR

1) Remove the gasket door from the door painting as.

2) Remove the barrier screen inner from the door painting as.

3) Remove the door sub as from the door painting as.

4) Remove the stopper hinge top as from the door painting as.

5) Remove the spring hook and the hook from the door painting as.

6) Remove the barrier screen outer from the door sub as.

7) Reverse the above steps for reassembly.

10

DESCRIPTION

KOM-9P2CBS

KOC-910K0S

KOC-910K0S

POM

PW1

KOM-9P0C9S

TEMP GLASS T3.2 CLEAR

AL

PAN 4X10 MFZN

KOC-1B0K0S

LUPOL 2300

Q’TY REMARK

1

1

1

1

1

1

1

1

2

1

1

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 the stopper hinge top, and then push the door to contact the door seal to the oven front surface.

• Tighten two screws.

(2) To reduce gap located on part ‘B’

• Loosen two screws on the stopper hinge under, and then push the door to contact the door seal to the oven front surface.

• Tighten two screws.

(3) To reduce gap located on part ‘C’

• Loosen the screw on the interlock switch assembly located the top of the oven body.

• Draw the interlock switch assembly inward as possible to engage with the hook on the door bottom.

• Tighten a screw.

(4) To reduce gap located on part ‘D’

• Loosen the screw on the interlock switch assembly located the bottom of the oven body.

NOTE : A small gap may be acceptable if the microwave leakage does not exceed 4mW/cm 2 .

11

5. To remove control panel parts.

B04 B03 B02 B01 B06 B07 B08 B11

C/PANEL ASSEMBLY :

PKCPSWZZ13

B05 B10 B09

REF No.

B04

B05

B06

B07

B00

B01

B02

B03

B08

B09

B10

B11

PART CODE PART NAME

PKCPSWZZ13 CONTROL-PANEL AS

3516741700 CONTROL-PANEL

3511621600

3511621100

DECORATOR FILM

DECORATOR C-PANEL

3513412900

3513412910

3515101600

3517400500

KNOB VPC

KNOB TIMER

SPRING FLAT

COUPLER VPC KNOB

7122401211

3518206320

3517400400

7122401211

SCREW TAPPING

TIMER

COUPLER TIMER

SCREW TAPPING

DESCRIPTION

KOM-9P25BS

ABS SG-175, SG-0760D

PC T0.5

STS430 T0.5 H/L

ABS SG-0760D SG-175

ABS SG-0760D SG-175

SUS 301 T0.5

POM

T2S TRS 4*12 MFZN

NT10MKD01E-P

POM

T2S TRS 4*12 MFZN

1) Remove the screw which secure the control panel and draw forward the control panel assembly.

2) Remove two screws which secure the timer assembly.

3) Pull out the timer assembly from the control panel.

4) Pull out the timer knob from the timer.

5) Remove the screw which secure the coupler.

6) Pull out the coupler and V.P.C knob from the control panel.

7) Reverse the above steps for reassembly.

Q’TY REMARK

1

1

1

1

1

1

1

1

1

2

1

1

12

6. To remove guide wind parts.

C05 C02 C03

GUIDE WIND ASSEMBLY :

3512524450

C04 C01

REF No.

C00

C01

C02

C03

C04

C05

PART CODE

3512524450

3512515300

3963514380

7121403011

3511800100

3518605500

PART NAME

GUIDE WIND AS

GUIDE WIND

MOTOR SHADED POLE

SCREW TAPPING

FAN

NOISE-FILTER

DESCRIPTION

KOR-1P559S AMANA

PP

230V 50Hz OEM-15DWC2-C03

T2S PAN 4X30 MFZN

P.P GF20

DWLF-M07

Q’TY REMARK

1

1

2

1

1

1) Remove two screws for earthing and for fixing to rear-plate.

2) Remove the noise filter from the guide wind.

3) Pull the fan from the motor shaft.

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

5) Remove the motor shaded pole.

6) Reverse the above steps for reassembly.

13

7. To remove high voltage capacitor.

1) Remove the 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

8. To remove magnetron.

1) Remove three screws which secure the magnetron.

2) Remove the magnetron.

3) Reverse the above steps for reassembly.

NOTE : Never install the magnetron without the metallic gasket plate which is packed with each magnetron to prevent microwave leakage. Whenever repair work is carried out on magnetron, check the microwave leakage.

It shall not exceed 4mW/cm 2 for a fully assembled oven with door normally closed.

Wave guide Magnetron antenna

Metalic gasket plate

Magnetron antenna

Stub

Cooling fin

<MAGNETRON>

Filament terminal

Metallic gasket plate

14

9. To remove wind guide assembly.

1) Remove the screw for earthing.

2) Remove the noise filter from the wind guide.

3) Remove the 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 reassembly.

10. 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.

15

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. The lock lever presses the button of the secondary interlock switch to bring it under ON condition.

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.

(3) Adjustment steps a) Loosen two mounting screws.

b) Adjust interlock switch assembly position.

c) Make sure that lock lever moves smoothly after adjustment is completed.

d) Tighten completely two mounting screws.

NOTE :

Microwave emission test should be performed after adjusting interlock mechanism.

If the microwave emission exceed 4mW/cm

2

, readjust interlock mechanism.

16

TROUBLESHOOTING GUIDE

Following the procedure below to check if the oven is defective 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.

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

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

NO

Does the fuse blow?

YES

Check continuity of interlock monitor switch with door shut.

NO NO

Continuity

NO

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.

(NOTE1)

Replace primary, secondary interlock switch and interlock monitor switch.

(NOTE1)

Both continuity

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

Normal

Replace high voltage capacitor.

Fuse again

Replace high voltage transformer

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

NO Continuity

Replace power supply cord.

NOTE1 : All these switches must be replaced at the same time, please refer to “Interlock Mechanism And

Adjustment”

17

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

YES

Does the oven lamp light?

Does the turntable turn?

YES

NO

Replace or repair oven lamp, turntable motor.

Normal reading should be approx. 0

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

NO

Continuity

Poor continuity

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

No Continuity

Continuity

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

Continuity in the reverse direction.

Continuity

Replace high

Voltage transformer

Replace high

Voltage transformer

Replace magnetron

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

Check the isolation of filament winding of high voltage transformer.

NO Continuity

Good

Replace high voltage transformer.

Replace magnetron

18

MEASUREMENT AND TEST

1. MEASUREMENT OF THE MICROWAVE 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. A cylindrical container of borosilicate glass is used for the test. It has a maximum thickness of 3mm, an external diameter of approximately 190mm and a height of approximately 90mm.

The mass of the container is determined.

2. At the start of the test, the oven and the empty container are at ambient temperature. Water having an initial temperature of 10˚C ± 1˚C is used for the test. The water temperature is measured immediately before it is poured into the container.

3. A quantity of 1000g ± 5g of water is added to the container and its actual mass obtained.

The container is then immediately placed in the centre of the oven shelf, which is in its lowest normal position.

The oven is operated and the time for the water temperature to attain 20˚C ± 2˚C is measured. The oven is then switched off and the final water temperature is measured within 60s.

NOTE 1 - The water stirred is before its temperature is measured.

NOTE 2 - Stirring and measuring devices are to have a low heat capacity.

4. The microwave power output is calculated from the formula

P = {4,187 • mw(T

2

-T

1

) + 0.55 • mc (T

2

-T

0

)}/t where

P is the microwave power output, in watts ; m w is the mass of the water, in grams ; m c is the mass of the container, in grams ;

T

0 is ambient temperature, in degrees Celsius ;

T

1 is the initial temperature of the water, in degree Celsius ;

T

2 is the final temperature of the water, in degrees Celsius ; t is the heating time, in seconds, excluding the magnetron filament heating-up time.

The microwave power output is stated in watts, rounded off to the nearest 50W

CAUTION

1. Water load should be measured exactly to 1 liter.

2. Input power voltage should be exactly specified voltage (Refer to SPECIFICATIONS).

3. Ambient temperature should be 20 ± 2°C (68 ± 3.6°F)

Heating time for power output: (T

2

= T

0

)

A (second)

B (W)

70

600

64

650

60

700

56

750

52

800

49

850

47

900

44

950

42

1000

40

1050

38

1100

19

2. MICROWAVE RADIATION TEST

CAUTION :

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.

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 .

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 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.

20

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. 130.5 Ω ±10%

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

Primary winding ..............................Approx. 1.371 Ω

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

Ω 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 Ω 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

Ω 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.

6. Interlock switches

(1) You can test continuity of safety interlock and monitor switch by using ohmmeter.

(2) The switch operation is checked by zero/unlimited. The meter should indicate zero resistance.

(3) The sequence of check is interlock monitor switch, primary and secondary interlock switches check.

21

WIRING DIAGRAM

22

F04

F05

F06

F07

F09

F50

EXPLODED VIEW AND PARTS LIST

1. DOOR ASSEMBLY

Refer to Disassembly and assembly.

2. CONTROL PANEL ASSEMBLY

Refer to Disassembly and assembly.

3. GUIDE WIND ASSEMBLY

Refer to Disassembly and assembly.

4. TOTAL ASSEMBLY

A00

B00

F01 F21 F22 F02

F48

F47

F52

F48

F20

F03

F51

F26

F49

F45

F46

F43

F48

F37

F29

F12

F42

F41

F40

F19

F13

F44

F38

F39

F36

F17

F18

F11

F14

F16

F15

F10

F08 F30 F31 F23 F24 F33 F32 F35

F34

F28 F25 F27

23

REF. NO PART CODE

F36

F37

F38

F39

F40

F41

F42

F43

F28

F29

F30

F31

F32

F33

F34

F35

F44

F45

F46

F47

F48

F49

F50

F51

F52

F20

F21

F22

F23

F24

F25

F26

F27

F12

F13

F14

F15

F16

F17

F18

F19

F04

F05

F06

F07

F08

F09

F10

F11

A00

B00

F01

F02

F03

PART NAME

3511731000 DOOR AS

PKCPSWZZ13 CONTROL-PANEL AS

3516121900

3966031300

7121400611

CAVITY AS

MOTOR SYNCRO

SCREW TAPPING

3517101600

3517402400

3511410100

4414H50000

3511410000

3517213100

3512785100

3513816000

STIRRER BLADE

COUPLER STIRRER

COVER STIRRER

FIXTURE AS

COVER HOLE *I

TRAY AS

HARNESS MAIN

LOCK

3513700800

3513702100

LEVER LOCK

LEVER SW MICRO

5S762G10G0 SW MICRO

4415A17352 SW MICRO

4415A66910

3513601600

3518570400

7122401211

SW MICRO

LAMP

SWITCH S/A RELAY

SCREW TAPPING

7122401211

3518906510

7121400611

3510319800

3512101400

3518303720

441X304112

3518401410

SCREW TAPPING

THERMOSTAT

SCREW TAPPING

BASE

FOOT

CAPACITOR HV

HOLDER HV CAPACITOR

DIODE HV AS

3518701610 FUSE HV

7S432X4081 SPECIAL SCREW

3515202800

7272400811

STOPPER HINGE *U AS

SCREW TAPTITE

3517304600 FOAM

7S312X40A1 SCREW SPECIAL

3518121760

3516003700

TRANS HV

SPECIAL SCREW

3518003810 MAGNETRON

7S627W50X1 NUT HEX

3518903900

7121300611

THERMOSTAT

SCREW TAPPING

3512515300

3963514380

7121403011

3518605500

GUIDE WIND

MOTOR SHADED POLE

SCREW TAPPING

NOISE-FILTER

3511800100

3511409500

FAN

COVER HOLE *O

7122401211 SCREW TAPPING

3511345QM5 CORD POWER AS

7122401011

7122401211

SCREW TAPPING

SCREW TAPPING

7272400811

3510810620

SCREW TAPTITE

CABINET

7S312X40A1 SCREW SPECIAL

24

DESCRIPTION

KOM-9P2CBS

KOM-9P25BS

KOM-9P0C9S

SM16F -HK36T1FY

T2S PAN 4X6 MFZN

AL050-H18 T0.7

PPS

PP

KOG-36150S

PP

KOM-9P0C9S TRAY CEILING

KOM-9P059S

PP

POM

POM,KOG-846T0S

SZM-V16-FD-63 S (200G)

VP-533A-OF SPNO #187 200G

VP-531A-OF/SZM-V16-FA-61

BL 240V 25W T25 C7A H187

DWSR-1

T2S TRS 4*12 MFZN

T2S TRS 4*12 MFZN

OFF:85 ON:50 H #187

T2S PAN 4X6 MFZN

SBHG T0.8

DASF-310

2300V 1.15UF #187 CLASS P 85MM

SECC 0.8T

HV03-12 400MA 12000V #187

5KV 1A

TT3 TRS 4X8 SE MFZN

KOR-121M0A

TT3 TRS 4X8 MFZN

CR 6TX220X30

T1 TRS 4X10 SE MFZN

R9S59A DS30

TT3 HEX 4X8 FLG MFZN

2M248H(DW)-B

NUT FLANGE M5X0.8P MFZN

OFF:160 ON:115 H #187

T2S PAN 3X6 MFZN

PP

230V 50HZ OEM-15DWC2-C03

T2S PAN 4X30 MFZN

DWLF-M07

P.P GF20

SBHG T0.8

T2S TRS 4*12 MFZN

3X1.0 80X80 120-RTML RUBBER(UK)

T2S TRS 4*10 MFZN

T2S TRS 4*12 MFZN

TT3 TRS 4X8 MFZN

STS 430 NO4 T0.5

T1 TRS 4X10 SE MFZN

Q'TY

1

1

2

1

1

4

1

2

1

6

1

4

1

1

1

1

3

1

4

2

1

1

1

1

1

4

1

1

1

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

S/M NO. : OM9P25BS001

DAEWOO ELECTRONICS CORP.

1-2, Jeo-dong 1(il)-ga, Jung-gu, Seoul, Korea

C.P.O. BOX 8003 SEOUL, KOREA

TELEX: DWELEC K28177-8

CABLE: “DAEWOOELEC”

PRINTED DATE: May. 2012

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