KOR-86B50P
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S/M No. : R63B50S001
Service Manual
Microwave Oven
Model: KOR-63B50P
KOR-86B50P
DAEWOO ELECTRONICS CO., LTD.
http://svc.dwe.co.kr
PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE
EXPOSURE TO EXCESSI VE MICR OWAV E 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.
SAFETY AND PRECAUTIONS ........................................................................................................ 2
1. FOR SAFE OPERATION ............................................................................................................. 2
2. FOR SAFE SERVICE PROCEDURES ........................................................................................ 2
SPECIFIC ATIONS ... ............ ......... ............ ............ ......... ............ ......... ........... ............ ......... .............. 3
EXTERNAL VIEW ............................................................................................................................ 4
1. OUTER DIMENSION .................................................................................................................... 4
2. FEATURE DIAGRAM ................................................................................................................... 4
INSTALLATIO N . ...... ...... ... ...... ... ...... ...... ... ...... ...... ... ...... ... ...... ...... ... ..... ...... ... ...... ...... ... ...... .............. 5
OPERATIONS AND FUNCTIONS .............................................................................. ......... ......... ... 6
DISASSEMBLY AND ASSEMBLY ......................................................................................... ......... 7
INTERLOCK MECHANISM AND ADJUSTMENT ........................................................................... 13
TROUBLE SHOOTING GUIDE ........................................................................................................ 14
MEASUREMENT AND TEST ...................................................................................... ......... ......... ... 1 6
1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT ..................................................... 16
2. MICROWAVE RADIATION TEST ................................................................................................ 17
3. COMPONENT TEST PROCEDURE ............................................................................................ 18
WIRING DIAGRAM .......................................................................................................................... 19
EXPLODED VIEW AND PARTS LIST ............................................................................................. 20
1. DOOR ASSEMBLY ...................................................................................................................... 20
2. CONTROL PANEL ASSEMBLY.................................................................................................... 20
3. TOTAL ASSEMBLY ...................................................................................................................... 20
SAFETY AND PREC AUTIONS
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 attem p t to defeat them.
DO NOT ATTEMPT TO SERVICE THIS APPLIANCE UNTIL YOU HAVE READ THIS SERVICE MANUAL.
2. FOR SAFE SERVICE PROCEDURES
1. If th e ove n is operative prior to servicin g, a microwav e emission check s ho uld b e p erforme d p rior 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 m anins lead of this appliance may not correspond with the coloured markings
identifying the terminals in your plug, proceed as follows.
The wire w hich is coloured green-and-yellow must be connected to the term ianl in the plug which is marked with the
letter ‘E’ or by earth sym bol or green-and-yellow.
The wire w hich is coloured blue m ust be connected to the terminal which is m arked with the letter ‘N’ or coloured black.
The wire w hich is coloured brown m ust be connected to the terminal which is m arked with the letter ‘L’ or coloured red.
NOTE
This oven is designed for counter-top use only.
SPECIFICATIONS
KOR-6305
MODEL KOR-6305
POW E R SU PP LY 220V-60HZ, SINGLE PHASE WITH EARTHING
MICROWAVE 1200W
POWER CONS UMPTION
MICROW AVE ENERGY OUT PUT 800W
MICROW AVE FREQUE NCY 2450MHz
OUTSIDE DIME N SION S (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
FUNCTIO N SELECTIONS MICROWAVE
POWE R SELECTIONS 5 LEVELS
CAVITY VOLUME 0.7 Cu.Ft.
GRILL
COMBINATION
KOR-8605
MODEL
POWER SUPPLY
MICROWAVE
POWER CONS UMPTION
MICROWAVE EN ERGY OUTPUT
MICROWAVE FREQUENCY
OUTSIDE DIMENSIONS (W X H X D)
CAVITY DIMENSIONS (W X H X D)
NET WEIGHT
TIMER
FUNCTIO N SELECTIONS
POWE R SELECTIONS
CAVITY VOLUME
Specifications are subject to change without notice.
GRILL
COMBINATION
KOR-8605
220V-60Hz, SINGLE PHASE WITH EARTH ING
1350W
900W
2450MHz
495 x 294 x 388 m m (19.5 x 11.6 x 15.3 in.)
320 x 244 x 338 m m (12.6 x 9.6 x 13.3 in.)
APPRO X . 15 Kg ( 33.1 lbs.)
35 min. DU AL SPEED
MICROWAVE
5 LEVELS
0.9 C u.Ft.
EXTERNAL VIEW
1. OUTER D IMENS ION (KO R-6 305/ KOR-8 60 5)
Fig.1 Front view Fig.2 Side view
2. FEATURE DIAGRAM
1. Safety interlock system
2. Door viewing screen -
3. Door hook -
the magnetron will im m ediately stop operating.
4. Oven cavity
5. Door seal -
6. Glass cooking tray -
7. Roller guide -
8. Coupler -
9. Knob V.P.C -
10. Knob timer -
11. Door release button -
When the door is closed, it will automatically shut. If the door is opened while the oven is operating,
Door seal maintains the microwave energy within the oven cavity and prevents microwave leakage.
This must always be used for cooking together with the glass cooking tray.
This fits over the shaft in the center of the ovens cavity floor. This is to remain in the oven for all cooking.
Used to select a microwave power level.
Used in setting cooking time for all functions.
Allows viewing of food. The screen is designed so that light can pass through, but not the microwave.
Made of special heat resistant glass. Food in a proper receptacle is placed on this tray for cooking.
By pushing this button the latch system cut off all circuits and stops the oven before the door is opened
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 ma y 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, 220 Volts, 60 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 m ay 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 esca pe wire for the electric current. This appliance is equipped w ith a c ord h aving a e arthing w ire 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 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 ma rked 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.
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.
NOTE
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 affe ct 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.
Variable power setting
Power level
Symbol
KOR-6305 KOR-8605
HIGH MAX MAX 30/0 100 %
MED H IGH 610W 690W 23.2/6.8 77 %
MED IUM 440W 490W 16.5/13.5 55 %
DEFRO S T 260W 290W 9.8/20.2 33 %
WARM 130W 150W 5/25 17 %
ON/OFF time (sec.)
Approximate Percentage
of Power
DISASSEMB LY AN D ASSEMB LY
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 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 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 rem ove their watches whenever w orking close to or replacing the magnetron.
WARNING
W hen 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, H V D iode.
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