Page 1
S/M No. : R63B50S001
Service Manual
Microwave Oven
Model: KOR-63B50P
KOR-86B50P
DAEWOO ELECTRONICS CO., LTD.
http://svc.dwe.co.kr
Page 2
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
Page 3
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.
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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.
Page 5
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
Page 6
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.
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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 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
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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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D ISASSE MBLY AND ASSE MBLY
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 alignm ent with the hinge and cavity front plate.
3. To remove door parts
DOOR AS :
351 1710330(KOR-63B5)
351 1710710(KOR-86B5)
KOR-63B5
REF.NO PART CODE PART NAME DESCRIPTIO N Q’TY REMARK
A01 3512203810 FRAM E DO O R ABS XR -401 H-2938 1
A02 3517003050 BARRIER-SCR EEN*O ACRYL 1
A03 3515304610 SUPPO RTER BARR -S*O PP 1
A04 3515204100 STOPPER HINGE *T AS KOR -63150S 1
A05 3511705500 DOO R W ELD AS KOR-61150S 1
A06 3517002800 BARRIER-SCR EEN *I POLYESTER T0.1 1
A07 3512300200 GASKET DOOR PP 1
A08 3513100700 HOOK POM 1
A09 3515101300 SPRING H OOK PW1 1
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D ISASSEMBLY AND ASSEMBLY
KOR-86B5
REF.NO PART CODE PART NAME DESCRIPTIO N Q’TY REMARK
A01 3512204110 FRAM E DO O R ABS XR -401 H-2938 1
A02 3517003150 BARRIER-SCR EEN*O ACRYL T1.5 1
A03 3515304410 SUPPO RTER BARR -S*O PP 1
A04 3515204100 STOPPER HINGE *T AS KOR -63150S 1
A05 3511705620 DOO R W ELD AS KOR-81250S 1
A06 3517002900 BARRIER-SCR EEN *I POLYESTER T0.1 1
A07 3512300400 GASKET DOOR PP 1
A08 3513100700 HOOK POM 1
A09 3515101300 SPRING H OOK PW1 1
(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 supporter barrier screen outer from door frame.
(7) Remove the barrier screen outer from door frame.
(8) 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 then
push 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 4m W/cm2.
Page 11
D ISASSE MBLY AND ASSE MBLY
5. To remove control panel parts
CONTROL PANEL AS :
3516719920(KOR-63B5)
3516720720(KOR-86B5)
KOR-6305
REF.NO PART CODE PART NAME DESCRIPTIO N Q’TY REMARK
B01 3513405510 KNOB VP C ABS XR -401 H-2938 1
B02 3516719010 CON TRO L-PANEL ABS X R-401 H-2938 1
B03 3517400500 COU PLER VPC KNO B POM 1
B04 7122401211 SCRE W TAPPING T2S TRS 4x12 MF ZN 1
B05 3517400400 COU PLER TIMER POM 1
B06 3518204500 TIMER KN35M KD 09K-P 1
B07 7122401211 SCRE W TAPPING T2S TRS 4x12 MF ZN 2
B08 3513405410 KNOB ABS XR -401 H-2938 1
B09 3513702710 LEVER D O OR OPE N ABS XR -401 H-2938 1
B10 441G430171 SPRING B UTTON SW P D IA 0.7 1
B11 3516906910 B UT TON D O OR O P EN ABS XR -401 H-2938 1
KOR-8605
REF.NO PART CODE PART NAME DESCRIPTIO N Q’TY REMARK
B01 3513405510 KNOB VPC ABS XR-401 H-2938 1
B02 3516719310 CONTRO L-PANEL ABS X R-401 H-2938 1
B03 3517400500 COUPLER VPC KNO B PO M 1
B04 7122401211 SCREW TAPPING T2S TRS 4x12 MF ZN 1
B05 3517400400 COUPLER TIMER POM 1
B06 3518204500 TIM ER KN35M KD 09K-P 1
B07 7122401211 SCREW TAPPING T2S TRS 4x12 MF ZN 2
B08 3513405410 KNOB ABS XR-401 H-2938 1
B09 3513702710 LEVER DO OR O PEN ABS XR -401 H-2938 1
B10 441G430171 SPRING B UTTON SW P D IA 0.7 1
B11 3516906910 B UT TON D O OR O P EN ABS XR -401 H-2938 1
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D ISASSEMBLY AND ASSEMBLY
(1) Remove the screw which secure the control panel, push up two snap fits and draw forward the control panel assembly.
(2) Remove the door open lever from the control panel.
(3) Remove two screws which secure the timer assembly.
(4) Remove the timer assembly.
(5) Pull out the timer knob from the timer.
(6) Pull out the timer coupler from the timer.
(7) Remove the screw which secure the V.P.C coupler.
(8) Pull out the V.P.C coupler, V.P.C knob and flat spring from the control panel.
(9) Remove the door open button and button spring from the control panel.
(10) 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.
High voltage circuit wiring
Page 13
D ISASSE MBLY AND ASSE MBLY
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 w ith each m agnetron to prevent
microwave leakage. Whenever repair work is carried out on magnetron, check the m icrowave leakage. It shall not
exceed 4mW/cm
2
for a fully assembled oven with door normally closed.
Page 14
8. To remove wind guide assembly
(1) Remove a screw which secure the wind guide assembly.
(2) Draw forward the wind guide assembly.
(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.
D ISASSEMBLY AND ASSEMBLY
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.
Page 15
INTER L OCK MECHANISM AND AD JU STM E NT
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.
ADJUSTM ENT
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 m echanism .
2
If the microwave emission exceed 4mW/cm
, readjust interlock mechanism.
Page 16
TROUBLE SHOOTING GUIDE
Repla ce high
Repla ce high
Following the proc edures 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 me ter.
(TROUBLE 1) Door shut, timer set, but no cooking takes place.
Does th e fan motor work when you
shut the door a nd turn the tim er?
NO
NO
YES
Check continuity of interlock
mon itor switch with door shut.
Repla ce fuse and check
continuity of both interlock
switch's c ontact and monitor
swi t c h's co ntact wi th door
partially o pen until monitor
sw itch c o n tac t.
Disconnect one side of the
lead wire connecte d from
transform er to the high voltage
capacitor, a nd operate oven.
Does the
fus e b lo w?
YES (Refer to next pa ge)
Continuity
NO Continuity
NO
Both co ntinuity
Normal
Repla ce primary, secondary
interlo ck sw itch an d interlock
m onitor switch.
Repla ce primary, secondary
interlo ck sw itch an d interloc k
m onitor switch.
voltage
capa c itor.
If outle t ha s prop er vo ltage,
check continuity of power
supp ly cord.
Fuse aga in
NO Continuity
voltage transformer
Repla ce power
supp ly cord.
Page 17
TROUBLE SHOOTING GUIDE
reading should
C h e c k c o n timuit y f ila m e n t
tap (3.3V) of high voltage.
Rep lace high
tra n s fo r me r.
continuity in the reverse and
Rep lace
mag netron.
Meter w ith 6V or higher
voltage batterie s sh ould
Good
NO Good
Doe s the fan m otor w o rk wh en yo u sh ut
the do or and tur n th e ti mer?
YES
Doe s the oven lam p light?
D o e s th e tu rntab le turn ?
YES
If microwave do not oscillate,
check continuity of filam ent
of magnetron.
Poor continuity
NO
NO
Con tinuity
Normal
be approx. 0
Ω
Continuity
Check the diode for
normal directions.
Continuity
NO Continuity
Con tinuity in
the reve rs e
direction.
Rep lace or repair oven lam p,
tur n tab le moto r.
voltage
Rep lace high
voltage diode.
Rep lace
mag netron.
Che ck the isolatio n o f
filam en t winding of high
voltage transformer.
be used to check the n orm al
direc tion re sista nce of
the diode.
Rep lace high
voltage
tra n sfo rmer.
Page 18
ME ASUREME NT AND TE ST
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 1000 ± 5cc 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
10 ± 2 ° C (50 ± 3.6 °F). 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 norm a l position.
4. Microwave power is switched on.
5. Heating tim e s hou ld be exactly A seconds (Refer to table as following).
Heating tim e is measured wh ile the m icrowave ge nerator is operating
at full power. The filame nt heat-up tim e for magnetron is not included.
6. The initial and final tem perature of w ater is selected so that the maxim um difference between the am bient and final water tem perature is 5K .
7. The m icrowave pow e r output P in watts is ca lculated from the following
formula:
P = 4187
•
• t is the heating time.
The power measured should be B (Refer to SPECIFICATIONS) W ± 10.0 %.
T/t
is difference between initial and ending temperature.
T
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 20 ± 2°C (68 ± 3.6°F)
Heating time for power output:
A (second)
B (W)
70 64 60 56 52 49 47 44 42 40 38
600 650 700 750 800 850 900 950 1000 1050 1100
Page 19
MEASUR E MENT AND TEST
2. MICROWAVE RADIATION TEST
WARNING
•
Make sure to check the microwave leakage before and after repair of adjustm ent.
•
Always start measuring of an unknown field to assure safety for operating personnel from m icrow ave energy.
•
Do not place your hands into any suspected m icrowave radiation field unless the safe density level is know n.
•
Care should be taken not to place the eyes in direct line with the source of microwave energy.
•
Slowly approach the unit under test until the radiom eter reads an appreciable microwave leakage from
the unit under the test.
PROCEDURE
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
600 cc glass beaker with an inside diameter of approx. 95 mm (3.5 in.).
3. Place it at the center of the tray and set it in a cavity.
4. Close the door and operate the oven.
5. M easure the leakage by using Microwave Energy Survey Meter w ith
dual ranges, set to 2450MHz.
Measured radiation leakage m ust not exceed the value prescribed
(1)
below. Leakage for a fully assembled oven with door normally
closed m ust be less than 4mW/cm
(2) When measuring the leakage, always use the 5 cm (2 in.)
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
vent sand 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.
2
.
Page 20
MEASUR E MENT AND TEST
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. 100±10%
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
(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.
once the capacitor charged.
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 Output Power." 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
(3) A continuity check between each filament terminal and magnetron case should read open.
or less.
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 im proper switch operation, replace the defective switch and
fuse at the same time. Replace just the fuse if the switches operate normally.
Page 21
WIRING DIAGR AM
Page 22
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
Page 23
EXPLODED VIEW AND PARTS LIST
(1) KOR-6305 0P
REF. NO. PART CODE PART NAME DESCRIPTION SUPPLY REMARK
A00 DOO R AS Refer to disassembly and assembly 1
B00 CONT ROL-PA NEL AS Refer to disassembly and assem bly 1
F01 3510801310 CABINET PCM T0.6 GE 1
F02 7112401011 SC R EW TAPPING T1 TRS 4X10 MFZN 3
F03
F04 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1
F05 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1
F06 7112401011 SC R EW TAPPING T1 TRS 4X10 MFZN 1
F07 35113ACNM 5 CORD PO W ER AS 3X0.75 40X 40 120-RTML 1
F08 4413A90012 CLAM P PO W ER C O RD NYLON 66 1
F09 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1
F10 7121403011 SCREW TAPPING T2S PAN 4X30 MFZN 2
F11 351251700 GUIDE W IND PP 1
F12 3963324300 MOTO R SH AD E PO LE 220V 25W M W10G A-M01 1
F13 3511800300 FAN P P+30% GLAS S 1
F14 3518002200 MAG NETR O N 2M218H(MF)I 1
F15 3516004000 SPECIAL SCRE W T 2 BOLT FLANGE 5X12 DACR O 1
F16 7272400811 SCREW TAPTITE TT3 TRS 4X8 M FZN 1
F17 3513003200 HOLD ER H V CAPACITOR SECC T0.6 1
F18 3518301900 CAPACITOR HV 2100V AC 0.84uF #187 1
F19 3518400400 DIODE HV HVR-1X-3AB 12KV #187 1
F20 3518113900 TRANS H V D Y-N80P0-63T 1
F21 3516003700 SPECIAL SCRE W T T3 HEX 4X8 SE M FZN 4
F22 3510311700 BASE SBHG T0.8 1
F23 7112401011 SC R EW TAPPING T1 TRS 4X10 MFZN 5
F24 3512100900 FOOT PP DAS F-130 2
F25 7272400811 SCREW TAPTITE TT3 TRS 4X8 M FZN 1
F26 3515201101 STOPPER HINGE *U SCP-1 T2.5 1
F27 4415A17352 SW M ICRO VP-533A-O F S PNO #187 200G 1
F28 4415A66600 SW M ICRO VP-532A-O F/SZM -V16-FA-61 1
F29 4415A17352 SW M ICRO VP-533A-O F S PNO #187 200G 1
F30 3513702600 LEVER LOCK POM 1
F31 3513811700 LOCK POM 1
F32 3513601600 LAMP BL 240V 25W T25 C7A H187 1
F33 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 1
F34 3966310100 MOTO R SY NC RO 220V 2.5W GM -16-24FD12 1
F35 3518905300 THERM O STAT OFF : 75 ON : 65 H #187 NB 1
F36 3513003400 HOLD ER TH ERM O STAT PBT 1
F37 7272400811 TAPTITE SCREW TT3 TRS 4X8 M FZN 1
F38 3511406200 COVE R W AVE GUIDE H EATPROOF PP 1
F39 3517400620 COU PLER X AREC 1
F40 3514700710 ROLLER TEFRO N 3
F41 3512517300 GUIDE RO LLER PP 5113M F6 A353B 1
F42 3517203600 TRAY GLASS 1
3516109000 CAVITY W ELD AS CAVITY WELD A S 1
3516109600 CAVITY JOINT AS CAVITY JOINT AS 1
3966310110 MOTO R SY NC RO 220V 2.5W M2LJ49ZT52 1
Page 24
EXPLODED VIEW AND PARTS LIST
(2) KOR-8605 0P
REF. NO. PART CODE PART NAME DESCRIPTION SUPPLY REMARK
A00 DOO R AS Refer to disassembly and assembly 1
B00 CONT ROL-PA NEL AS Refer to disassembly and assem bly 1
F01 3510801400 CABINET PCM T0.6 1
F02 7112401011 SC R EW TAPPING T1 TRS 4X10 MFZN 3
F03
F04 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1
F05 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1
F06 7112401011 SC R EW TAPPING T1 TRS 4X10 MFZN 1
F07 35113ACNM 5 CORD PO W ER AS 3X0.75 40X 40 120-RTML 1
F08 4413A90012 CLAM P PO W ER C O RD NYLON 66 1
F09 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1
F10 7121403011 SCREW TAPPING T2S PAN S 4X30 MFZN 2
F11 3512517000 GU IDE WIND PP 1
F12 3963324300 MOTO R SH AD E PO LE 220V 25W M W10G A-M01 1
F13 3511800300 FAN P P+30% GLAS S 1
F14 3518002200 MAG NETR O N 2M218H(MF)I 1
F15 3516004000 SPECIAL SCRE W T 2 BOLT FLANGE 5X12 DACR O 1
F16 7272400811 SCREW TAPTITE TT3 TRS 4X8 M FZN 1
F17 3513003200 HOLD ER H V CAPACITOR SECC T0.6 1
F18 3518301900 CAPACITOR HV 2100V AC 0.84uF #187 1
F19 3518400400 DIODE HV HVR-1X-3AB 12KV #187 1
F20 3518114200 TRANS H V D Y-N90P0-86T 1
F21 3516003700 SPECIAL SCRE W T T3 HEX 4X8 SE M FZN 4
F22 3510311900 BASE SBHG T0.8 1
F23 7112401011 SC R EW TAPPING T1 TRS 4X10 MFZN 5
F24 3512100900 FOOT PP DAS F-130 2
F25 7272400811 SCREW TAPTITE TT3 TRS 4X8 M FZN 1
F26 3515201101 STOPPER HINGE *U SCP-1 T2.5 1
F27 4415A17352 SW M ICRO VP-533A-O F S PNO #187 200G 1
F28 4415A66600 SW M ICRO VP-532A-O F/SZM -V16-FA-61 1
F29 4415A17352 SW M ICRO VP-533A-O F S PNO #187 200G 1
F30 3513702600 LEVER LOCK POM 1
F31 3513811700 LOCK POM 1
F32 3513601600 LAMP BL 240V 25W T25 C7A H187 1
F33 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 1
F34 3966310100 MOTO R SY NC RO 220V 2.5W GM -16-24FD12 1
F35 3518905300 THERM O STAT OFF : 75 ON : 65 H #187 NB 1
F36 3513003400 HOLD ER TH ERM O STAT PBT 1
F37 7272400811 TAPTITE SCREW TT3 TRS 4X8 M FZN 1
F38 3511406200 COVE R W AVE GUIDE H EATPROOF PP 1
F39 4418D10032 CO U PLER P PS 1
F40 3514700710 ROLLER TEFRO N 3
F41 3512517300 GUIDE RO LLER PP 5113M F6 A353B 1
F42 3517203500 TRAY GLASS 1
3516109200 CAVITY W ELD AS CAVITY WELD A S 1
3516109700 CAVITY JOINT AS CAVITY JOINT AS 1
3966310110 MOTO R SY NC RO 220V 2.5W M2LJ49ZT52 1
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