DAEWOO ELECTRONICS R63250S001 User manual

Service Manual
Microwave Oven
Model: KOR-63250S
KOR-86250S
DAEWOO ELECTRONICS CO., LTD.
S/M No. : R63250S001

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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 ...........................................................................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
(a) Do not operate or allow the oven to be operated with the door open.
(b)Make the following safetychecks on allovens 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 ormisadjusted components in the interlock,monitor, door seal, and microwave generation and
transmission systems shallbe repaired,replaced, or adjusted by procedures described in this manual before the
oven is released to the owner.
(e)A microwave leakage check to verifycompliance with the Federal performance standard should be performed on
each oven prior to release to the owner.
PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE
EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

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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 NOTUSE 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 ovencavity surface should be kept clean.
No grease, soil or spatter should be allowed to build up on these surfacesor inside the oven.
DO NOT ATTEMPT TO OPERATE THIS APPLIANCE WITH THE DOOROPEN. 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 NOTATTEMPT 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 emissioncheck 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 ofthe wires in the manins lead of this appliance may notcorrespond 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-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.
This oven is designed for counter-top use only.
NOTE

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SPECIFICATIONS
KOR-6325
KOR-8625
 Specifications are subject to change without notice.
MODEL KOR-6325
POWER SUPPLY 230V-50Hz, SINGLE PHASE WITH EARTHING
POWER CONSUMPTION MICROWAVE 1200W
GRILL
COMBINATION
MICROWAVE ENERGY OUTPUT 800W
MICROWAVE FREQUENCY 2450MHz
OUTSIDE DIMENSIONS (W X H X D) 465 x 279 x 360 mm (18.3 x 11.0 x 14.2 in.)
CAVITY DIMENSIONS (W X H X D) 290 x 220 x 306 mm (11.4 x 8.7 x 12.0 in.)
NET WEIGHT APPROX. 13 Kg ( 28.7 lbs.)
TIMER 35 min. DUAL SPEED
FUNCTION SELECTIONS MICROWAVE
POWER SELECTIONS 5 LEVELS
CAVITY VOLUME 0.7 Cu.Ft.
MODEL
KOR-8625
POWER SUPPLY
230V-50Hz, SINGLE PHASE WITH EARTHING
POWER CONSUMPTION MICROWAVE
1350W
GRILL
COMBINATION
MICROWAVE ENERGY OUTPUT
900W
MICROWAVE FREQUENCY
2450MHz
OUTSIDE DIMENSIONS (W X H X D)
495 x 294 x 388 mm (19.5 x 11.6 x 15.3 in.)
CAVITY DIMENSIONS (W X H X D)
320 x 244 x 338 mm (12.6 x 9.6 x 13.3 in.)
NET WEIGHT
APPROX.15 Kg ( 33.1 lbs.)
TIMER
35 min.DUAL SPEED
FUNCTION SELECTIONS
MICROWAVE
POWER SELECTIONS
5 LEVELS
CAVITY VOLUME
0.9 Cu.Ft.

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EXTERNAL VIEW
1. OUTER DIMENSION
- KOR-6325/KOR-8625
2. FEATURE DIAGRAM
1. Safety interlock system
2. Door viewing screen -Allowsviewing offood. Thescreen is designedso thatlight canpass through, but not the microwave.
3. Door hook -
When the door is closed, it willautomatically shut off.Ifthe door is opened while the oven is operating,
the automatically shut off.
4. Oven cavity
5. Door seal - Door seal maintains the microwave energy within the oven cavity and prevents microwave leakage.
6. Glass cooking tray -Made of special heat resistant glass. Food in a proper receptacle isplaced on this tray for cooking.
7. Roller guide - This must always be used for cooking together withthe glass cooking tray.
8. Coupler - This fits over the shaft in the center of the ovens cavity floor. This is to remain in the oven for all cooking.
9. Knob V.P.C - Used to select a microwave power level.
10. Knob timer - Used in setting cooking time for all functions.
465/495 360/388
279/294
Fig.2 Side view
Fig.1 Front view

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INSTALLATION
1. Steady, flat location
This microwave oven should be set on a steady, flat surface.
This microwave oven is designed forcounter 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 ifthe oven is located close to a TV, radio,antenna or feederand so on.
Position the oven as far from them aspossible.
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 meterslong.
•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 fordamage resulting from use
of this oven with a voltageof ampere fuse otherthan those specified.
•This appliance is supplied with cable ofspecial type, which, if damaged, must be repaired with cableof 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.
This appliance must be earthed. In theevent of an electricalshort 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 mustbe plugged into an outlet that is properlyinstalled and earthed.
EARTHING INSTRUCTIONS
WARNING
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 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 usean extension cord.

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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 glasstray. The glass tray must always
be in place during cooking.
3. Close the door securely.
4. Choose cooking power levelby 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 doorwhile 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.
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 andtimer knob turns to the desired position, the V.P.C switch has a cycle
(ON/OFF time(sec.)) listedbelow.
 6325/8625
Variable power setting ON/OFF time (sec.) Approximate Percentage of Power
MAX (HIGH) 30/0 100 %
610W /700W (MED HIGH) 23.2/6.8 77 %
440W / 500W (MEDIUM) 16.5/13.5 55 %
260W / 290W (DEFROST) 9.8/20.2 33 %
130W / 150W (WARM) 5/25 17 %
NOTE
1. When setting timer for less than 2 minutes, turn the
timer past 2 minutes andthen returnto 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 theoven is properlyinstalled and plugged into the electrical outlet.

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DISASSEMBLY ANDASSEMBLY
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 resultin an electric shock or possible danger from a short circuit.
You are asked to observethe 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 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.
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.
5. After repair or replacementof parts, make sure that the screws are
properly tightened, and all electrical connections are tightened.
6. Do not operate without cabinet.
CAUTION
WARNING
Service personnel should remove their watches whenever working close to or replacing the magnetron.
When servicing the appliance,need a care oftouching or replacing high potential parts because ofelectrical shock
or exposing microwave.These parts are as follows - HV Transformer, Magnetron,HV Capacitor, HV Diode, HV Fuse.

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DISASSEMBLY ANDASSEMBLY
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 securethe stopper hinge top.
(2) Remove the door assembly fromtop plate of cavity.
(3) Reverse the above for assembly.
3. To remove door parts
KOR-6325
REF.NO PART CODE PART NAME DESCRIPTION Q’TY REMARK
A01 3517005600 BARRIER-SCREEN*O ACRYL 1
A02 3512203820 FRAME DOOR ABS XR-401 H-2938 1
A03 2TE20008CL TAPE DOUBLE 0.2TX8mm CLEAR 0.5ME
A04 3515204100 STOPPER HINGE *T AS KOR-63150S 1
A05 3511705500 DOOR WELD AS KOR-61150S 1
A06 3517002800 BARRIER-SCREEN *I POLYESTER T0.1 1
A07 3512300200 GASKET DOOR PP 1
A08 3513100700 HOOK POM 1
A09 3515101310 SPRING HOOK HSW-3 1
DOOR ASSEMBLY
: 35117010350(KOR-63250S)
35117010750(KOR-86250S)
NOTE
After replacing the door assembly, perform a check of
correct alignment with the hinge and cavity front plate.

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KOR-8625
(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 fromdoor weld as.
(5) Remove the spring and the hook.
(6) Remove the barrier screen outerfrom 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 sealto oven front surface.
•Tighten a screw.
(2) To reduce gap located on part ‘B’.
•Loosen two screws onstopper hinge under,and then
push the door to contact the doorseal to oven front surface.
•Tighten two screws.
REF.NO PART CODE PART NAME DESCRIPTION Q’TY REMARK
A01 3517005700 BARRIER-SCREEN*O ACRYL T1.5 1
A02 3512204120 FRAME DOOR ABS XR-401 H-2938 1
A03 2TE20008CL TAPE DOUBLE 0.2TX8mm CLEAR 0.5M
A04 3515204100 STOPPER HINGE *T AS KOR-63150S 1
A05 3511705620 DOOR WELD AS KOR-81250S 1
A06 3517002900 BARRIER-SCREEN *I POLYESTER T0.1 1
A07 3512300400 GASKET DOOR PP 1
A08 3513100730 HOOK POM BLACK 1
A09 3515101310 SPRING HOOK HSW-3 1
DISASSEMBLY ANDASSEMBLY
NOTE
A small gap may be acceptable if the microwave leakage does not exceed 4mW/cm2.