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Service Manual
Microwave Oven
Model: KOR-63470S
DAEWOO ELECTRONICS CO., LTD.
http://svc.dwe.co.kr
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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 micro-
wave 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 gen-
erating 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 per-
formed 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........................................................................................................................................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
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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 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 and CDRH 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 terminal in the plug which is marked with
the letter ‘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.
NOTE :
The oven is designed for counter-top use only.
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MODEL KOR-63470S
POWER SUPPLY 230V~50Hz, SINGLE PHASE WITH EARTHING
MICROWAVE 1,200 W
POWER CONSUMPTION 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 Ibs.)
TIMER 60 min. Dual Speed
FUNCTION SELECTIONS MICROWAVE
POWER SELECTIONS 7 LEVELS
CAVITY VOLUME 0.7 Cu. Ft.
* SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.
SPECIFICATIONS
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EXTERNAL VIEW
1. OUTER DIMENSION
1. Safety interlock system
2. Door viewing screen - Allows viewing of food. The
screen is designed so that light can pass through, but
not the microwave.
3. 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.
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 is placed on this
tray for cooking.
7. Roller guide - This must always be used for cooking
together with the 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 func-
tion.
2. FEATURE DIAGRAM
3 5
2 4 7 8 6
1
9
10
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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 oven 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.
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 6 amperes, 230Volts, 50Hz grounded outlet.
➢
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 samaged, 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 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 outlet that is properly installed ant earthed.
INSTALLATION
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 accpt 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.
EARTHING INSTRUCTIONS
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Variable power setting Approximate Percentage
Power level Symbol (KOR-63470S) of Power
HIGH MAX 100%
MED HIGH 700W 88%
MEDIUM 580W 73%
LOW STAGE 470W 59%
DEFROST 17%
HEAT 26%
GENTLE HEATING 18%
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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 mechanisms 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 and timer knob to the desired position, the V.P.C switch has a cycle
(ON/OFF time(sec.)) listed below.
NOTE
1. When setting timer for less than 2 minutes,
tum 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.
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DISASSEMBLY AND ASSEMBL Y
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 grounding.
Do not operate on a 2-wire extension cord.
The microwave oven is designed to be used with grounded.
It is imperative, therefore, to make sure it is grounded
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 remove their watches whenever working close to or replacing the magnetron.
CAUTION : 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.
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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 two screws which secure the stopper hinge top.
2) Remove the door assembly from top plate of cavity.
3) Reverse the above for reassembly.
NOTE : After replacing the door assembly, perform a check of
correct alignment with the hinge and cavity front plate.
3. T o remove door parts.
REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK
A01 3512203850 FRAME DOOR ABS XR-401, H-2938 1
A02 3517005620 BARRIER-SCREEN*O TEMP GLASS T3.2 1
A03 3515204100 STOPPER HINGE*T AS KOR-63150S 1
A04 3511706120 DOOR PAINTING AS KOR-634R0S 1
A05 3517002800 BARRIER-SCREEN*I PE 0.1T 1
A06 3512300200 GASKET DOOR PP 1
A07 3513100730 HOOK POM BLACK 1
A08 3515101310 SPRING HOOK HSW-3 1
A09 7001503310 SCREW MACHINE PAN 5X33 MFZN 2
A10 3512603210 HANDLE DOOR ALUMITE 1
A11 3511601500 DECORATOR LOGO AL T1.5 1
A12 3511604610 DECORATOR DOOR*U STS T0.6 1
A13 3511604600 DECORATOR DOOR*T STS T0.6 1
A14 3516003940 SPECIAL DOUBLE TAPE SI-161 T0.15 27MM 1
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4. Method to reduce the gap between the door seal and the oven front surface.
(1) To reduce gap located on part ‘A’
• Loosen two screws on stopper hinge top, and then
push the door to contact the door seal to oven
front surface.
• Tighten two screws.
(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.
(1) Remove the gasket door from door weld as.
(2) Remove the barrier screen inner from 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.
NOTE : A small gap may be acceptable if the microwave leakage does not exceed 4mW/cm2.
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5. T o remove control panel parts.
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.
REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK
B01 3513402650 KNOB VPC ABS XR-401, H-2938 1
B02 3513402550 KNOB TIMER ABS XR-401, H-2938 1
B03 3511603930 DECORATOR C-PANEL STS T0.6 1
B04 3516003950 SPECIAL DOUBLE TAPE SI-161 T0.15 1
B05 3516719070 CONTROL PANEL ABS XR-401, H-2938 1
B06 3515101600 SPRING FLAT SUS 301 T0.5 1
B07 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1
B08 3518205100 TIMER KN60MKD 12E-P 1
B09 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 2
B10 3517400400 COUPLER TIMER POM 1
B11 3517400510 COUPLER VPC KNOB POM 1
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6. T o 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
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7. T o 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 pre-
vent microwave leakage. Whenever repair work is carried out on magnetron, check the microwave leakage.
It shall not exceed 4mW/cm
2
for a fully assembled oven with door normally closed.
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8. T o 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 reasembly.
9. T o 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.
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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 NO condition and presses the button of the secondary interlock switch to bring it under
ON condition.
(3) Adjustment steps
a) Loosen the one mounting screw.
b) Adjust interlock switch assembly position.
c) Make sure that lock lever moves smoothly after adjustment is completed.
d) Tighten completely two mounting screws.
ADJUSTMENT :
Interlock monitor switch
When the door is closed, the interlock monitor switch should be changed (NO condition) before other switches are closed.
When the door is opened, the interlock monitor switch should be changed (NC condition) after other switches are opened.
NOTE :
Microwave emission test should be performed after adjusting interlock mechanism.
If the microwave emission exceed 4mW/cm
2
, readjust interlock mechanism.
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(TROUBLE 1) Oven does not operate at all ; any inputs can not be accepted.
TROUBLE SHOOTING GUIDE
Following the procedure below to check if the oven is defective or not.
1. Check grounding before trouble checking.
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 check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.
Does the
fuse blow?
NO
NONO
Does the fan motor work when you
shut the door and turn the timer?
YES
If outlet has proper voltage, check
continuity of power supply cord.
Replace power supply cord.
NO Continuity
Check continuity of interlock
monitor switch with door shut.
Replace primary, secondary interlock
switch and interlock monitor switch.
Continuity
Both 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.
Replace primary, secondary interlock
switch and interlock monitor switch.
NO
Fuse again
Disconnect one side of the
lead wire connected from
transformer to the high
voltage capacitor, and operate
oven.
Replace high voltage capacitor.
Replace high voltage transformer
Normal
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Does the oven lamp light?
Does the turntable turn?
YES
YES
Continuity
Does the fan motor work when you
shut the door and turn the timer?
Check the isolation of filament
winding of high voltage
transformer.
Replace high voltage
transformer.
NO Continuity
Replace magnetron
Good
Replace or repair oven lamp,
turntable motor.
NO
If microwave do not
oscillate, check continuity
of filament of magnetron.
Poor continuity
NO
Continuity
Check continuity
filament tap (3.3V)
of high voltage.
Replace high
Voltage transformer
No Continuity
Continuity
Check continuity
filament tap (3.3V)
of high voltage.
Replace high
Voltage transformer
Continuity in
the reverse
direction.
Replace magnetron
Normal reading
should be
approx. 0Ω
Meter with 6V or higher
voltage batteries should
be used to check the normal
direction resistance of
the diode
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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 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 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 :
•
▲▲T is difference between initial and ending temperature.
• t is the heating time.
The power measured should be B (
Refer to SPECIFICATIONS
)W±10.0%.
P=4187 X ▲▲T/t
CAUTION :
1. Water load should be measured exactly to 1 liters.
2. Input power voltage should be exactly specified voltage(Refer to SPECIFICATIONS).
3. Ambient temperature should be 20±2˚C(68±3.6˚F)
Heating time for power output:
70
600
64
650
60
700
56
750
52
800
49
850
47
900
44
950
42
1000401050381100
A(second)
B(W)
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2. MICROWAVE RADIATION TEST
PROCEDURES
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 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/cm
2
.
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.
CAUTION :
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.
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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. 110Ω±10%
Filament winding....................................Approx. 0Ω
Primary winding.....................................Approx. 1Ω
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 10MΩ once the capacitor is charged.
(3) A shorted capacitor will show continuous continuity.
(4) An open capacitor will show constant 10MΩ.
(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 KΩ 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 0.1Ω 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.
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WIRING DIAGRAM
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21
1. DOOR ASSEMBLY
Refer to Disassembly and assembly.
2. CONTROL PANEL ASSEMBLY
Refer to Disassembly and assembly.
3. TOTAL ASSEMBLY
EXPLODED VIEW AND PARTS LIST
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NAME PART CODE PART NAME DESCRIPTION Q'TY
A00 DOOR AS
Refer to disassembly and assembly
1
B00 CONTROL PANEL AS
Refer to disassembly and assembly
1
F01 3510801310 CABINET PCM T0.36 GE 1
F02 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 3
F03
3516109000 CAVITY WELD AS CAVITY WELD AS 1
3516109600 CAVITY JOINT AS CAVITY JOINT AS 1
F04 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1
F05 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1
F06 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 1
F07 35113AEQ0D CORD POWER AS 3X0.75 70X70 100-RTML 1
F08 4413A90012 CLAMP POWER CORD NYLON66 1
F09 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 1
F10 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1
F11
4415D67620 FUSE 250V 12A 65TS 1
4415D67120 FUSE 250V 12A MDA 1
F12 3518606200 FILTER NOISE DWLF-M12 1
F13 7121403011 SCREW TAPPING T2S PAN 4X30 MFZN 2
F14 3512517000 GUIDE WIND PP 1
F15
3963513100 MOTOR SHADED POLE 230V 17W OEM-10DWC2-A07 1
3963512310 MOTOR SHADED POLE 230V 20W MW10CA-M02 1
F16 3511800300 FAN PP+30%GLASS 1
F17 3518002200 MAGNETRON 2M218H(MF)I 1
F18 3516004000 SPECIAL SCREW T2 BOLT FLANGE 5X12 DACRO 1
F19 7272400811 TAPTITE SCREW TT2 TRS 4*8 MFZN 1
F20 3513003200 HOLDER HV CARACITOR SECC T0.6 1
F21 3518302200 CAPACITOR HV 2100VAC 0.98uF #187 1
F22 3518400400 DIODE HV HVR-1X-3AB 12KV #187 1
F23 3518701100 FUSE HV 5KV 0.55A HV-41A55-02 1
F24 3518113700 TRANS HV DY-N80S0-63T 1
F25 3516003700 SPECIAL SCREW TT3 FLG HEX 4X8 MFZN 4
F26 3510311700 BASE SBHG T0.8 1
F27 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 5
F28 3512100900 FOOT PP DASF-130 2
F29 7272400811 SECRW TAPTITE TT3 TRS 4X8 MFZN 1
F30 3515201101 STOPPER HINGE *U SCP-1 T2.5 1
F31 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1
F32 3518570400 SW S/A RELAY DWSR-1 1
F33 4415A17352 SW MICRO VP-533A-OF SPNO #187 200G 1
F34 4415A66910 SW MICRO VP-531A-OF/SZM-V16-FA-61 1
F35 4415A17352 SW MICRO VP-533A-OF SPNO #187 200G 1
F36 3513702610 LEVER LOCK POM 1
F37 3513811710 LOCK POM 1
F38 3513601600 LAMP BL 240V 25W T25 C7A H187 1
F39 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 1
F40
3966310100 MOTOR SYNCRO 220V 2.5W GM-16-24FD12 1
3966310110 MOTOR SYNCRO 220V 2.5W M2LJ49ZT52 1
F41 3518905300 THERMOSTAT OFF:75 ON:65 H #187 NB 1
F42 3513003400 HOLDER THERMOSTAT PBT 1
F43 7272400811 SCREW TAPTITE TT3 TRS 4X8 MFZN 1
F44 3511406200 COVER WAVE GUIDE HEATPROOF PP 1
F45 3517400620 COUPLER XAREC 1
F46 3514700710 ROLLER TEFLON 3
F47 3512517300 GUIDE ROLLER PP 5116MF6 A353B 1
F48 3517203600 TRAY GLASS 1
Page 24
S/M NO. :
DAEWOO ELECTRONICS CO., L TD.
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 : G7F00E@web.dwe.co.kr
PRINTED DATE: Nov. 1999
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