DAEWOO ELECTRONICS KOG-5747 User manual

Service Manual
Microwave Oven
Sep. 2000
DAEWOO ELECTRONICS CO.,LTD
http ://svc.dwe.co.kr
MODEL :
KOG-5747

1
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 ........................................................................... 17
TROUBLE SHOOTING GUIDE ........................................................................................................ 18
MEASUREMENT AND TEST ........................................................................................................... 19
1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT ..................................................... 19
2. MICROWAVE RADIATION TEST ................................................................................................ 20
3. COMPONENT TEST PROCEDURE ............................................................................................ 21
WIRING DIAGRAM .......................................................................................................................... 22
EXPLODED VIEW AND PARTS LIST ............................................................................................. 23
1. DOOR ASSEMBLY ...................................................................................................................... 23
2. CONTROL PANEL ASSEMBLY ................................................................................................... 23
3. TOTAL ASSEMBLY ...................................................................................................................... 23
PRECAUTIONSTOBEOBSERVEDBEFOREANDDURINGSERVICINGTO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
(a) Do not operate or allow the oven to be operated with the door open.
(b)Makethefollowingsafetychecksonallovenstobeservicedbeforeactivatingthemagnetronorothermicrowave
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
droppingor 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
transmissionsystemsshall berepaired,replaced,or adjusted byproceduresdescribed in thismanualbeforethe
oven is released to the owner.
(e)Amicrowaveleakagecheck to verifycompliancewiththeFederalperformancestandard should beperformedon
eachoven priorto releaseto theowner.

2
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 gasked plate and oven surface should be kept clean.
No greas,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 micrwave oven has concealead switch 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 t
he 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 manafacterer and CDRH innediately.
IMPORTANT
The wire in this mains lead colourred in accordance with the following code.
Green-and-yellow : Earth
Blue : Neartral
Brown. : live
As the colords of the wires in the manins lead of this appliance may not correspond with the coloured makings
identifying the terminals in your plug, proced 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 terminals which is marked with the letter ‘N’or coloured
black.
he wire which is coloured brown must be with the letter ‘L’or coloured red.
NOTE:
The oven is desigend for counter-top use only.

3
SPECIFICATIONS
*SPECIFICATIONSARESUBJECTTOCHANGEWITHOUTNOTICE.
MODEL KOG-5747
POWER SUPPLY 230V ~ 50Hz, SINGLE PHASE WITH EARTHING
POWER CON-
SUMPTION MICROWAVE 1,200 W
GRILL 1,050 W
COMBINATION 2,200 W
MICROWAVE ENERGY OUTPUT 800 W
MICROWAVE FREQUENCY 2,450 MHz
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 208 x 306 mm (11.4 x 8.2 x 12.0 in)
NET WEIGHT Approx. 14kg (30.9 lbs.)
TIMER 60 min. Dual Speed
FUNCTION SELECTIONS MICROWAVE /GRILL / COMBINATION
POWER SELECTIONS 7 LEVELS
CAVITY VOLUME 0.7 Cu. Ft.

4
EXTERNAL VIEW
1. OUTER DIMENSION
2. FEATURE DIAGRAM
1) Door seal - Door seal maintains the microwave energy within the oven cavity and prevents microwave leakage.
2) Cover Heater
3) Heating Element
4) Oven cavity
5) Safety interlock system
6) Knob V.P.C - Used to select microwave poer level.
7) Knob timer - Used in setting cooking time for all functions.
8) Metal Rack
9) Coupler - This fits over the shaft in the center of the ovens cavity floor.
This is to remain in the oven for all cooking.
10) Roller guide - This must always be used for cooking together with the glass cooking tray.
11) Glass cooking tray - Made of special heat resistant glass.
Food in a proper receptacle is placed on this tray for cooking.
12) Door viewing screen - Allows viewing of food.
The screen is designed so that light can pass through, but not the microwave.
13) Door hook - When the door is closed, it will automatically shut off.
If the door is opened while the oven is operating, the magnetron will immediately stop operating.
7
6
8
910
111213
541 23

5
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 oven failure.
3. Away from Radio and TV sets
Poor television reception and radio interference may result if the oven is located closed 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 11 amperes, 230Volts, 50Hz grounded outlet.
Power supply cord is about 1.4 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 amprer 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.
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 escape wire for the electric current. This applicance is equipped with a cord having a reathing wire with a
earthing plug. The plug must be plugged into an outlet that is properly installed ant 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 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.

6
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.
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 adujst 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.
To set MICROWAVE cooking
Set the variable power selector to the desired power level.
To set GRILL cooking
Set the POWER SELECTOR to the (grill) position.
To set COMBI cooking
Set the POWER SELECTOR to the (combi) position.
POWER LEVEL SYMBOL APPROXIMATE PERCENTAGE OF POWER
HIGH MAX 100%
MED-HIGH 700W 88%
MEDIUM 580W 73%
DEFROST 41%
HEAT 26%
1. When setting timer for less than 2 minutes, turn the
timer pass 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.
NOTE
When using the GRILL or COMBI mode;
Donotopenthedoorsoopen,thetemperatureinsidetheovendecreseandthecooking may not be completed in setting time.
Never touch the oven window and metal interior of the oven when taking food in and out, because the temperature inside the
oven and door is very high.
When using these mides, be careful as the tray will be hot to touch, use oven gloves or pot holders while handling tray.
NOTE
***

7
DISASSEMBLY AND ASSEMBLY
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 scredriver and ware rubber gloves when servicing the high voltage side.
3. Discahrge 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 15A 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.
SHORT
CAUTION : Service personnel should remove their watches whenever working close to or replacing the magnetron.
CAUTION :When servicingthappliance, needa careof touchingorreplacing highpotential partsbecauseof electricalshock
or exposing microwave. These parts are as follows - HV Transformer, Magnetron, HV Capacitor, HV Diode,
HV Fuse.

8
DISASSEMBLY AND ASSEMBLY
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.
3. To remove door parts.
REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK
A01 3512203850 FRAMEDOOR ABS XR-401, H-2938 1
A02 3517005620 BARRIER-SCREEN*O TEMP GLASS T3.2 MIRROR 1
A03 3515204100 STOPPER HINGE*T AS KOR-63150S 1
A04 3511706120 DOOR PAINTING AS KOR-634R0S 1
A05 3517002800 BARRIER-SCREEN*I PE0.1T 1
A06 3512300200 GASKETDOOR PP 1
A07 3513100730 HOOK POMBLACK 1
A08 3515101310 SPRINGHOOK HSW-3 1
A09 7001503310 SCREW MACHINE PAN5X33 MFZN 2
A10 3512603210 HANDLEDOOR STEEL NI + CR 1
A11 3511601500 DECORATOR LOGO ALT1.5 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
NOTE : After replacing the door assembly, perform a check of correct alignment
with the hinge and cavity front plate.
A04 A05 A06
A01 A02 A03
A08
A07
A13
A14
A12
DOOR ASSEMBLY
KOG-57470S : 3511712140
A10A11 A09

10
(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 barrier screen outer from door frame.
(7) Reverse the above steps for reassembly.
4. Method to reduce the gap between the door seal and the oven front surface.
(1) To reduce gap located on part ‘A’
Loosen two screws on stopper hinge top, and then
push the door to contact the door seal to oven front
surface.
(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.
DISASSEMBLY AND ASSEMBLY
NOTE : A small gap may be acceptable if the microwave leakage does not exceed 4mW/cm 2

11
5. To 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 control panel.
5) Pull out the timer couple 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) Remove two switches from the control panel.
9) Remove the decorator c-panel from the control panel.
10) 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 1KOG-57470S
B02 3511603930 DECORATOR C-PANEL STS T0.6 1
B03 3516003950 SPEICAL DOUBLE TAPE SI-161 T0.15 1
B04 3516719070 CONTROL-PANEL ABS XR-401, H-2938 1
B05 4415A66910 SW MICRO VP-531A-OF/SZM-V16-FA-61 1
B06 3515101600 SPRING FLAT SUS 301 T0.5 1
B07 7122401211 SCREW TAPPING T2S TRS 4*12 MFZN 1
B08 3518205100 TIMER KN60MKD 12E-P 1
B09 7122401211 SCREW TAPPING T2S TRS 4*12 MFZN 2
B10 3517400400 COUPLER TIMER POM 1
B11 3517400510 COUPLER VPC KNOB POM 1
B12 4415A17352 SW MICRO VP-533A-OF SPNO #187 200G 1
B13 3513402550 KNOB ABS XR-401, H-2938 1KOG-57470S
DISASSEMBLY AND ASSEMBLY
B08B07B05B04B02B01 B03 B06
B11 B10 B09
B13
B12
CONTROL-PANEL ASSEMBLY
KOG-57470S : 3516720350

12
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
7. To remove magnetron.
1) Remove a screw which secure the magnetron.
2) Remove the magnetron.
3) Reverse the above steps for reassembly.
DISASSEMBLY AND ASSEMBLY
NOTE : Never install the magnetron without the metallic gasket plate which is packed with each magnetron to prevent
microwave leakage. Whenever repair work is carried out on magnetron, check the microwave leakage.
It shall not exceed 4mW/ for a fully assembled oven with door normally closed.cm2

13
8. To 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. To remove H.V. transformert.
1) Remove four screws holding the H.V.transformer.
2) Remove the H.V.transformer.
3) Reverse the above steps for reassembly.
DISASSEMBLY AND ASSEMBLY

14
10. To remove tray motor.
(1) Remove the coupler in the cavity.
(2) Turn the set upside down.
(3) Cut the tray motor cover part from the base plate.
(4) Remove the tray motor cover.
(5) Remove a screw which secure the tray motor.
(6) Remove the tray motor.
(7) Reverse the above steps for reassembly except for
securing the tray motor cover with screw.
11. To remove heater top assembly.
(1) Remove one side of the heater harness.
(2) Remove a screw which secure the cover insulator top.
(3) Remove the cover insulator top.
(4) Remove the heater top assembly.
(5) Reverse the above steps for reassembly.
DISASSEMBLY AND ASSEMBLY

15
12. To remove heater parts.
REF NO. PART CODE PART NAME DESCRIPTION Q'TY REMARK
C01 3512765100 HARNESS HEATER KOC-970T1S TEFLON 1
C02 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 2
C03 3510607800 BRACKET HEATER *T SBHG T0.5 2
C04 3512803700 HEATER MIRACLON 115V AC 500W 2
C05 3511408100 COVER HEATER *T STS430 T0.5 1
DISASSEMBLY AND ASSEMBLY
C05C04C03C01 C02
HEATER TOP ASSEMBLY : 3512803600

16
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 smothly 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 , readjust interlock mechanism.
2

17
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.
(TROUBLE 1) Oven does not operate at all ; any inputs can not be accepted.
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
YES ( Refer to next page )

18
TROUBLE SHOOTING GUIDE
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. 0
Meter with 6V or higher
voltage batteries should
be used to check the normal
direction resistance of
the diode

19
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
190mm.
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%.
Heating time for power output :
A(second) 70 64 60 56 52 49 47 44 42 40 38
B(W) 600 650 700 750 800 850 900 950 1000 1050 1100
+
_
+
_+ _
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)
+
_+
_

20
MEASUREMENT AND TEST
2. MICROWAVE RADIATION TEST
PROCEDURES
1. Prepare Microwave Energy Survey, 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 breaker with an inside diameter of approx.
95mm(3.5in.).
3. Place it at the center of the tray and set in a cavity.
4. Close the door and operate the oven.
5. Measure the leakage by using Microwave Energy Survey
Meter with dual ranes, 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) 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 prove
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.
+
_+_
2
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 approch the unit under test until the radiometer readds an appreciable microwave leakage from the
unit under the test.
+_