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S/M No. : R63250S002

Service Manual
Microwave Oven
Model: KOR-63250S KOR-86250S

DAEWOO ELECTRONICS CO., LTD.

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 power to the microwave oven for any service test or inspection within the microwave generating 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 performed 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 .................................................................................................................................................5 INSTALLATION ...................................................................................................................................................................5 OPERATIONS AND FUNCTIONS .......................................................................................................................................6 DISASSEMBLY AND ASSEMBLY......................................................................................................................................7 INTERLOCK MECHANISM AND ADJUSTMENT .............................................................................................................14 TROUBLE SHOOTING GUIDE .........................................................................................................................................15 MEASUREMENT AND TEST ............................................................................................................................................17 1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT ........................................................................17 2. MICROWAVE RADIATION TEST ...................................................................................................................18 3. COMPONENT TEST PROCEDURE ........................................................................................................................19 WIRING DIAGRAM ............................................................................................................................................................20 EXPLODED VIEW AND PARTS LIST...............................................................................................................................21 1. DOOR ASSEMBLY .........................................................................................................................................21 2. CONTROL PANEL ASSEMBLY ......................................................................................................................21 3. TOTAL ASSEMBLY.........................................................................................................................................21

1

SAFETY AND PRECAUTIONS
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 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 termianl in the plug which is marked with the letter `E' or by earth symbolor green-add-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
This oven is designed for counter-top use only.

2

SPECIFICATIONS
KOR-6325
MODEL POWER SUPPLY POWER CONSUMPTION MICROWAVE GRILL COMBINATION 8 00W 2450MHz 465 x 279 x 360 mm (18.3 x 11.0 x 14.2 in.) 290 x 220 x 306 mm (11.4 x 8.7 x 12.0 in.) Approx. 13 kg (28.7 Ibs.) 35 min. DUAL SPEED MICROWAVE 5 LEVELS 0.7 Cu. Ft. KOR-6325 230V-50Hz, SINGLE PHASE WITH EARTHING 1000W

MICROWAVE ENERGY OUTPUT MICROWAVE FREQUENCY OUTSIDE DIMENSIONS (W X H X D) CAVITY DIMENSIONS (W X H X D) NET WEIGHT TIMER FUNCTION SELECTIONS POWER SELECTIONS CAVITY VOLUME

KOR-8625
MODEL POWER SUPPLY POWER CONSUMPTION MICROWAVE GRILL COMBINATION 900W 2450MHz 495 x 294 x 388 mm (19.5 x 11.6 x 15.3 in.) 320 x 244 x 338 mm (12.6 x 9.6 x 13.3 in.) APPROX. 15 Kg ( 33.1 lbs.) 35 min. DUAL SPEED MICROWAVE 5 LEVELS 0.9 Cu.Ft. KOR-8625 230V-50Hz, SINGLE PHASE WITH EARTHING 1350W

MICROWAVE ENERGY OUTPUT MICROWAVE FREQUENCY OUTSIDE DIMENSIONS (W X H X D) CAVITY DIMENSIONS (W X H X D) NET WEIGHT TIMER FUNCTION SELECTIONS POWER SELECTIONS CAVITY VOLUME * SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.

3

EXTERNAL VIEW
1. OUTER DIMENSION

Fig.1 Front view

Fig.1 Side view

2. FEATURE DIAGRAM

11. Safety interlock system 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 automatically shut off. 14. Oven cavity 15. Door seal - Door seal maintains the microwave energy within the oven cavity and prevents microwave leakage. 16. Glass cooking tray - Made of special heat resistant glass. Food in a proper receptacle is placed on this tray for cooking. 17. Roller guide - This must always be used for cooking together with the glass cooking tray. 18. Coupler - This fits over the shaft in the center of the ovens cavity floor. This is to remain in the oven for all cooking. 19. Knob V.P.C - Used to select a microwave power level. 10. Knob timer - Used in setting cooking time for all functions.

4

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 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 6amperes, 230 Volts, 50 Hz. 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 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 wire with 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 of 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 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.

5

OPERATIONS AND FUNCTIONS
1. Connect the main 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 mechanims 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. NOT 1. When setting timer for less than 2 minutes, turn the timer past 2 minutes and then return to the correct timer setting

2. 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.

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

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 turns to the desired position, the V.P.C switch has a cycle(ON/OFF time(sec.)) listed below.

6325/8625
Variable power setting MAX 610W / 700W 440W / 500W 260W / 290W 130W / 150W (HIGH) (MED HIGH) (MEDIUM) (DEFROST) (WARM) ON/OFF time (sec.) 30/0 23.2/6.8 16.5/13.5 9.8/20.2 5/25 Approximate Percentage of Power 100 % 77 % 55 % 33 % 17 %

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6. Do not operate without cabinet.

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

4. When the 12A fuse is blown out due to the operation of the monitor switch; replace primary interlock switch, secondary interlock switch and interlock monitor switch.

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

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

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

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.

Cautions to be observed when trouble shooting

DISASSEMBLY AND ASSEMBLY

(1) Check the earthed. Do not operate on a two-wire extension cord. The microwave oven is designed to be used with earthed. It is imperative, therefore, to makes 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.

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.

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

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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 screw which secure the stopper hinge top. (2) Remove the door assembly from top plate of cavity. (3) Reverse the above for assembly. NOTE : After replacing the door assembly, perform a check of correct alignment with the hinge and cavity front plate.

3. To remove door parts

KOR-6325 REF NO. A01 A02 A03 A04 A05 A06 A07 A08 A09 PART CODE 3517005600 3512203820 2TE20008CL 3515204100 3511705500 3517002800 3512300200 3513100700 3515101310 PART NAME BARRIER-SCREEN*O FRAME DOOR TAPE DOUBLE STOPPER HINGE *T AS DOOR WELD AS BARRIER-SCREEN *I GASKET DOOR HOOK SPRING HOOK DESCRIPTION ACRYL ABS XR-401 H-2938 0.2TX8MM CLEAR KOR-63150S KOR-61150S POLYESTER T0.1 PP POM HSW-3 Q'TY 1 1 0.5ME 1 1 1 1 1 1 REMARK

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KOR-8625 REF NO. A01 A02 A03 A04 A05 A06 A07 A08 A09 PART CODE 3517005700 3512204120 2TE20008CL 3515204100 3511705620 3517002900 3512300400 3513100730 3515101310 PART NAME BARRIER-SCREEN*O FRAME DOOR TAPE DOUBLE STOPPER HINGE *T AS DOOR WELD AS BARRIER-SCREEN *I GASKET DOOR HOOK SPRING HOOK DESCRIPTION ACRYL T1.5 ABS XR-401 H-2938 0.2TX8MM CLEAR KOR-63150S KOR-81250S POLYESTER T0.1 PP POM BLACK HSW-3 Q'TY 1 1 0.5M 1 1 1 1 1 1 REMARK

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

4. Method to reduce the gap between the door seal and the oven front surface
(1) To reduce gap located on part `A'. Loosen a screw on stopper hinge top, and then push the door to contact the door seal to oven front surface. Tighten a screw. (2) To reduce gap located on part `B'. Loosen two screws on stopper hinge under, and thenpush 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.

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5. To remove control panel parts

KOR-6325 REF NO. B01 B02 B03 B04 B05 B06 B07 B08 B09 KOR-8625 REF NO. B01 B02 B03 B04 B05 B06 B07 B08 B09 PART CODE 3513405520 3516719320 3515101600 3517400500 7122401211 3517400400 3518203800 7122401211 3513405420 PART NAME KNOB VPC CONTROL-PANEL SPRING PLAT COUPLER VPC KNOB SCREW TAPPING COUPLER TIMER TIMER SCREW TAPPING KNOB DESCRIPTION ABS XR-401 H-2938 ABS XR-401 H-2938 SUS301 POM T2S TRS 4X12 MFZN POM KN35MKD 24E-P T2S TRS 4X12 MFZN ABS XR-401 H-2938 Q'TY 1 1 1 1 1 1 1 2 1 REMARK PART CODE 3513405520 3516719020 3515101600 3517400500 7122401211 3517400400 3518203800 7122401211 3513405420 PART NAME KNOB VPC CONTROL-PANEL SPRING PLAT COUPLER VPC KNOB SCREW TAPPING COUPLER TIMER TIMER SCREW TAPPING KNOB DESCRIPTION ABS XR-401 H-2938 ABS XR-401 H-2938 SUS301 POM T2S TRS 4X12 MFZN POM KN35MKD 24E-P T2S TRS 4X12 MFZN ABS XR-401 H-2938 Q'TY 1 1 1 1 1 1 1 2 1 REMARK

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(1) Remove the screw which secure the control panel, push up 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 the timer. (5) Pull out the timer coupler from the 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) Reverse the above steps for reassembly.

6. To remove high voltage 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.

x High voltage circuit wiring

11

7. To remove magnetron
(1) Remove a screw 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/cm2 for a fully assembled oven with door normally closed.

12

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 reassembly.

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.

13

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 "OFF" condition and 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 opened before other switches are closed. When the door is opened, the interlock monitor switch should be closed after other switches are opened.

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

NOTE : Microwave emission test should be performed after adjusting interlock mechanism. If the microwave smission exceed 4mW/cm2, readjust interlock mechanism.

14

TROUBLE SHOOTING GUIDE
Following the procedures below to check if the oven is defective or not
1. Check grounding before checking trouble. 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 then check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.

(TROUBLE 1) Door shut, timer set, but no cooking takes place.

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

Des the fuse blow? NO

YES

Check continuity of interlock monitor switch with door shut. NO 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. Both continuity Disconnect one side of the lead wire connected from transformer to the high voltage capacitor, and operate oven.

Continuity

Replace primary, secondary interlock switch and interlock monitor switch.

NO

Replace primary, secondary interlock switch and interlock monitor switch.

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.

15

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.

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

NO Continuity

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

NO Continuity

Replace high voltage transformer.

Check the diode for continuity in the reverse and normal directions.

Continuity in the reverse direction.

Replace high voltage diode.

Continuity Meter with 6V or highter Voltage atleries should be used to check the normal direction resistance of the diode.

Replace magnetron.

Check the isolation of filament winding of high voltage transformer.

NO Good

Replace high voltage transformer.

Good

Replace magnetron.

16

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. 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 10005cc 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 102C (503.6F). 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 : P = 4187 X v T/t vT is difference between initial and ending temperature. It is the heating time. The power measured should be B (Refer to SPECIFICATIONS)W10.0%.

CAUTION : 1. Water load should be measured exactly to 1 liters. 2. Input power voltage should be exactly specified voltage(Refer to 2 SPECIFICATIONS). 3. Ambient temperature should be 202C(683.6F)

Heating time for power output: 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

17

2. MICROWAVE RADIATION TEST
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.

PROCEDURES 1. Prepare Microwave Energy Survey Meter, 600cc glass beaker, and glass thermometer 100C(212F). 2. Pour 275cc15cc of tap water initially at 205C(689F) 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/cm2. 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.

18

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. 11010% 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.

19

WIRING DIAGRAM

20

EXPLODED VIEW AND PARTS LIST
1. DOOR ASSEMBLY
Refer to Disassembly and assembly.

2. CONTROL PANEL ASSEMBLY
Refer to Disassembly and assembly.

3. TOTAL ASSEMBLY

21

KOR-63250S
REF NO. A00 B00 F01 F02 F03 F04 F05 F06 F07 F09 F10 F11 F12 F13 F14 F15 F16 F17 F18 F19 F20 F21 F22 F23 F24 F25 F26 F27 F28 F29 F30 F31 F32 F33 F34 F35 F36 F37 F38 F39 F40 F41 F42 F43 F44 F45 F46 F47 F48 PART CODE PART NAME DOOR AS CONTROL-PANEL AS CABINET SCREW TAPPING CAVITY WELD AS CAVITY JOINT AS SCREW TAPPING SCREW TAPPING SCREW TAPPING CORD POWER AS SCREW TAPPING SCREW TAPPING FUSE FUSE FILTER NOISE SCREW TAPPING GUIDE WIND MOTOR SHADE POLE MOTOR SHADE POLE FAN MAGNETRON SPECIAL SCREW SCREW TAPTITE HOLDER HV CAPACITOR CAPACITOR HV DIODE HV FUSE HV TRANS HV SPECIAL SCREW BASE SCREW TAPPING FOOT SCREW TAPTITE STOPPER HINGE *U SCREW TAPPING SW S/A RELAY SW MICRO SW MICRO SW MICRO LEVER LOCK LOCK LAMP SCREW TAPPING MOTOR SYNCRO MOTOR SYNCRO THERMOSTAT HOLDER THERMOSTAT SCREW TAPTITE COVER WAVE GUIDE COUPLER ROLLER GUIDE ROLLER TRAY DESCRIPTION REFER TO DISASSEMBLY AND ASSEMBLY REFER TO DISASSEMBLY AND ASSEMBLY PCM T0.36 GE T1 TRS 4X10 MFZN CAVITY WELD AS CAVITY JOINT AS T2S TRS 4X12 MFZN T2S TRS 4X12 MFZN T1 TRS 4X10 MFZN 3X0.75 70X70 100-RTML T1 TRS 4X10 MFZN T2S TRS 4X12MFZN 250V 12A 65TS 250V 12A MDA DWLF-M12 T2S PAN 4X30 MFZN PP 230V 17W OEM-10DWC2-A07 230V 20W MW10CA-M02 PP+30%GLASS 2M218H(MF) I T2 BOLT FLANGE 5X12 DACRO TT3 TRS 4X8 MFZN SECC T0.6 2100VAC 0.98MF #187 HVR-1X-3AB 12KV #187 5KV 0.55A HV-41A55-02 DY-N80S0-63T TT3 FLG HEX 4X8 MFZN SBHG T0.8 T1 TRS 4X10 MFZN PP DASF-130 TT3 TRS 4X8 MFZN SCP-1 T2.5 T2S TRS 4X12 MFZN DWSR-1 VP-533A-OF SPNO #187 200G VP-531A-OF/SZM-V16-FA-61 VP-533A-OF SPNO #187 200G POM POM BL 240V 25W T25 C7A H187 T2S PAN 4X6 MFZN 220V 2.5W GM-16-24FD12 220V 2.5W M2LJ49ZT52 OFF:75 ON:65 H #187 NB PBT TT3 TRS 4X8 MFZN HEATPROOF PP XAREC TEFLON PP 5113MF6 A353B GLASS Q'TY 1 1 1 3 1 1 1 1 2 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 4 1 5 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 1 1 REMARK

3510801310 7112401011 3516019000 3516109600 7122401211 7122401211 7112401011 35113AEQ0D 7112401011 7122401211 4415D67620 4415D67120 3518606200 7121403011 3512517000 3963513100 3963512310 3511800300 3518002200 3516004000 7272400811 3513003200 3518302200 3518400400 3518701100 3518113700 3516003700 3510311700 7112401011 3512100900 7272400811 3515201101 7122401211 3518570400 4415A17352 4415A66910 4415A17352 3513702600 3513811710 3513601600 7121400611 3966310100 3966310110 3518905300 3513003400 7272400811 3511406200 3517400620 3514700710 3512517300 3517203600

22

KOR-86250S
REF NO. A00 B00 F01 F02 F03 F04 F05 F06 F07 F09 F10 F11 F12 F13 F14 F15 F16 F17 F18 F19 F20 F21 F22 F23 F24 F25 F26 F27 F28 F29 F30 F31 F32 F33 F34 F35 F36 F37 F38 F39 F40 F41 F42 F43 F44 F45 F46 F47 F48 PART CODE PART NAME DOOR AS CONTROL-PANEL AS CABINET SCREW TAPPING CAVITY WELD AS CAVITY JOINT AS SCREW TAPPING SCREW TAPPING SCREW TAPPING CORD POWER AS SCREW TAPPING SCREW TAPPING FUSE FUSE FILTER NOISE SCREW TAPPING GUIDE WIND MOTOR SHADE POLE MOTOR SHADE POLE FAN MAGNETRON SPECIAL SCREW SCREW TAPTITE HOLDER HV CAPACITOR CAPACITOR HV DIODE HV FUSE HV TRANS HV SPECIAL SCREW BASE SCREW TAPPING FOOT SCREW TAPTITE STOPPER HINGE *U SCREW TAPPING SW S/A RELAY SW MICRO SW MICRO SW MICRO LEVER LOCK LOCK LAMP SCREW TAPPING MOTOR SYNCRO MOTOR SYNCRO THERMOSTAT HOLDER THERMOSTAT SCREW TAPTITE COVER WAVE GUIDE COUPLER ROLLER GUIDE ROLLER TRAY DESCRIPTION Q'TY REFER TO DISASSEMBLY AND ASSEMBLY 1 REFER TO DISASSEMBLY AND ASSEMBLY 1 PCM T0.6 1 T1 TRS 4X10 MFZN 3 CAVITY WELD AS 1 CAVITY JOINT AS 1 T2S TRS 4X12 MFZN 1 T2S TRS 4X12 MFZN 1 T1 TRS 4X10 MFZN 2 3X0.75 70X70 100-RTML 1 T1 TRS 4X10 MFZN 1 T2S TRS 4X12 MFZN 1 250V 12A 65TS 1 250V 12A MDA 1 DWLF-M12 1 T2S PAN 4X30 MFZN 2 PP 1 230V 17W OEM-10DWC2-A07 1 230V 20W MW10CA-M02 1 PP+30%GLASS 1 2M218H(MF) I 1 T2 BOLT FLANGE 5X12 DACRO 1 TT3 TRS 4X8 MFZN 1 SECC T0.6 1 2100VAC 0.98MF #187 1 HVR-1X-3AB 12KV #187 1 5KV 0.55A HV-41A55-02 1 DW-N90S0-86T 1 TT3 FLG HEX 4X8 MFZN 4 SBHG T0.8 1 T1 TRS 4X10 MFZN 5 PP DASF-130 2 TT3 TRS 4X8 MFZN 1 SCP-1 T2.5 1 T2S TRS 4X12 MFZN 1 DWSR-1 1 VP-533A-OF SPNO #187 200G 1 VP-531A-OF/SZM-V16-FA-61 1 VP-533A-OF SPNO #187 200G 1 POM 1 POM 1 BL 240V 25W T25 C7A H187 1 T2S PAN 4X6 MFZN 1 220V 2.5W GM-16-24FD12 1 220V 2.5W M2LJ49ZT52 1 OFF:75 ON:65 H #187 NB 1 PBT 1 TT3 TRS 4X8 MFZN 1 HEATPROOF PP 1 ZAREC 1 TEFLON 3 PP 1 GLASS 1 REMARK

3510801400 7112401011 3516109200 3516109700 7122401211 7122401211 7112401011 35113AEQ0D 7112401011 7122401211 4415D67620 4415D67120 3518606200 7121403011 3512517000 3963513100 3963512310 3511800300 3518002200 3516004000 7272400811 3513003200 3518302200 3518400400 3518701100 3518114000 3516003700 3510311900 7112401011 3512100900 7272400811 3515201101 7122401211 3518570400 4415A17352 4415A66910 4415A17352 3513702600 3513811710 3513601600 7121400611 3966310100 3966310110 3518905300 3513003400 7272400811 3511406200 4418D10032 3514700710 3512509200 3517203500

ALTER

ALTER

23

DAEWOO ELECTRONICS CO., LTD.
686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: "DAEWOOELEC" FAX: 02) 360-8184 TEL: 02) 360-8183

E-mail : [email protected]

S/M NO. : R63250S002

PRINTED DATE: Mar. 2001.