DAEWOO ELECTRONICS KOR-63671S User manual

Service Manual
Microwave Oven
Model: KOR-63671S
KOR-86671S
DAEWOO ELECTRONICS CO., LTD.
S/M No. : R63671S001


  
SAFETY AND PRECAUTIONS ........................................................................................................ 2
1. FOR SAFE OPERATION ............................................................................................................. 2
2. FOR SAFE SERVICE PROCEDURES ........................................................................................ 2
SPECIFICATIONS ............................................................................................................................ 3
EXTERNAL VIEW ............................................................................................................................ 4
1. OUTER DIMENSION(KOR-6315/KOR-8615) .............................................................................. 4
2. FEATURE DIAGRAM ................................................................................................................... 4
INSTALLATION ................................................................................................................................ 5
OPERATIONS AND FUNCTIONS ................................................................................................... 6
DISASSEMBLY AND ASSEMBLY .................................................................................................. 7
INTERLOCK MECHANISM AND ADJUSTMENT ...........................................................................13
TROUBLE SHOOTING GUIDE ........................................................................................................ 14
MEASUREMENT AND TEST ...........................................................................................................16
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
(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


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 personnelshould 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 notattemptto 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 priorto servicing the oven.
2)If any certified oven unitis 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 ofthe excessive leakage,
(d) tell the owner of the unit not to use the unituntil the oven has been broughtinto compliance.
3) If the oven operates with the door open, the service person should tell the usernot 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 ofthis 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 l
etter ‘E’, earth symbol or coloured green-and-yellow.
The wire which is coloured blue must be connected to the terminal which is marked with the letter ‘N’ or
coloured black.
The wire which is coloured brown must be connected to the terminal which is marked with the letter ‘L’or
coloured red.
This oven is designed for counter-top use only.
NOTE


SPECIFICATIONS
• SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.
MODEL KOR-6367 KOR-8667
POWER SUPPLY 230V~50Hz,SINGLE PHASE WITH EARTHING
POWER
CONSUMPTION MICROWAVE 1200W 1350W
GRILL
COMBINATION
MICROWAVE ENERGY OUTPUT 850W 950W
MICROWAVE FREQUENCY 2450MHz
OUTSIDE DIMENSIONS (W X H X D) 465 x 279 x 370 mm
(18.3 x 11.0 x 14.6 in.) 495 x 294 x 403 mm (19.5 x 11.6 x 15.9 in.)
CAVITY DIMENSIONS (W X H X D) 290 x 220 x 306 mm
(11.4 x 8.7 x 12.0 in.) 320 x 244 x 338 mm (12.6 x 9.6 x 13.3 in.)
NET WEIGHT APPROX.13.5 Kg (30.9 lbs.) APPROX.15 Kg ( 33.1 lbs.)
TIMER 60 min.DUAL SPEED
FUNCTION SELECTIONS MICROWAVE
POWER SELECTIONS 7 LEVELS
CAVITY VOLUME 0.7 Cu.Ft. 0.9 Cu. Ft.


EXTERNAL VIEW
1. OUTER DIMENSION(KOR-6367/kor-8667)
2. FEATURE DIAGRAM
1. Safety interlock system
2. Door viewing screen -
Allows viewing of food.The screen is designed so thatlight can pass through, but notthe microwave.
3. Door hook -
When the dooris closed,itwillautomatically shut.If the dooris opened while the oven is operating,the magnetron
will immediately stop operating.
4. Oven cavity
5. Door seal -
Doorsealmaintains 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 is placed on this tray for cooking.
7. Roller guide -
This must always be used forcooking together with the glass cooking tray.
8. Coupler -
This fits over the shaft in the centerof 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.


EARTHING INSTRUCTIONS
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 mightbe adversely
affected and breakdowns occur.
5. Power supply
• Check your local power source.
This microwave oven requires a current ofapproximately 6 amperes, 230 Volts, 50 Hz.
• Power supply cord is about0.8 meters long.
• The voltage used mustbe 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
ofthis 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 dentin 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 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 outletthat 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 ifdoubt 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.


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 mechanism
stop the generation ofmicrowave 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 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 Approximate Percentage
of Power
Power level Symbol
KOR-6367 KOR-8667
HIGH MAX MAX 100 %
MED HIGH 750W 840W 88 %
MEDIUM 620W 690W 73 %
LOW STAGE 500W 560W 59 %
DEFROST 17 %
HEAT 26 %
GENTLE HEATING 18 %
12
0
1
3
4
5
6
7
8
9
10
20
30
40
50
60
1. When setting timerfor 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 yourmicrowave oven.
NOTE
OPERATIONS AND FUNCTIONS
Make sure the oven is properly installed and plugged into the electrical outlet.


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 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 wear 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 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 has stopped an electric
charge remains in the high voltage capacitor. When replacing
orchecking parts, short between oven chassis and the negative
high terminal ofthe high voltage capacitor by using a properly
insulated screwdriver to discharge.
4. When the 12A fuse is blown 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
WARNING
Service personnel should remove their watches wheneverworking close to or replacing the magnetron.
When servicing the appliance, the a care when 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.


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 secure the stopper hinge top.
2) Remove the door assembly from top plate of cavity.
3) Reverse the above for reassembly.
3. To remove door parts
(1) KOR-63671S
REF. NO PART CODE PART NAME DESCRIPTION QTY REMARK
A01 3512203830 FRAME DOOR ABS 1
A02 3517005610 BARRIER-SCREEN *0 PMMA 1.5t 1
A03 3515306500 SUPPOTER BARR-S *0 ABS 1
A04 3511603800 DECORATOR DOOR ABS 1
A05 3511706100 DOOR PAINTING AS KOR-61150S 1
A06 3517002800 BARRIER-SCREEN *1 KOR-61150S PE 0.1t 1
A07 3515204110 STOPPER HINGE *T AS KOR-636T1S SCP T2.6 1
A08 3515101310 SPRING HOOK HSW-3 1
A09 3513100730 HOOK KOR-6325 POM 1
A10 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN
A11 3512300200 GASKET DOOR KOR-61150S PP 1
NOTE
After replacing the door assembly, perform a check of correct alignmentwith the hinge and cavity front plate.


DISASSEMBLY ANDASSEMBLY
(2) KOR-8667S
1) Remove the gasket door from door plate.
2) Remove ascrew which scuke the door plate and door frame
3) Remove the door frame from door plate.
4) Remove the stopper hinge top from door plate.
5) Remove the spring and the hook.
6) Remove the supporter barrier screen outer from door frame.
7) Remove the barrier screen outer from door frame.
8) Remove the decorator door from door frame.
9) 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 frontsurface.
Tighten a screw.
2) To reduce gap located on part ‘B’.
Loosen two screws on stopper hinge under, and then
push the door to contact the door seal to oven front surface.
Tighten two screws.
REF. NO PART CODE PART NAME DESCRIPTION QTY REMARK
A01 3512204130 FRAME DOOR ABS 1
A02 3517005710 BARRIER-SCREEN *0 PMMA 1.5t 1
A03 3515306600 SUPPOTER BARR-S *0 ABS 1
A04 3511604000 DECORATOR DOOR ABS 1
A05 3511711800 DOOR PAINTING AS KOR-866T1S 1
A06 351700600 BARRIER-SCREEN *I KOR-866T1S PE 0.1t 1
A07 3515204110 STOPPER HINGE *T AS KOR-636T1S SCP T2.6 1
A08 3515101310 SPRING HOOK HSW-3 1
A09 3513100730 HOOK KOR-6325 POM 1
A10 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1
A11 3512302000 GASKET DOOR KOR--86671S PP 1
NOTE
A small gap may be acceptable if the microwave leakage does not exceed 4mW/cm
2
.