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S/M No. : R63U50S001
Service Manual
Microwave Oven
Model: KOR-63U50S KOR-63V50S KOR-63W50S KOR-63X50S KOR-63Y50S
DAEWOO ELECTRONICS CO., LTD. http : //svc.dwe.co.kr Mar. 2002
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 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.
TABLE OF CONTENTS
SAFETY AND PRECAUTIONS ...........................................................................................................................................2 SPECIFICATIONS ...............................................................................................................................................................3 EXTERNAL VIEW................................................................................................................................................................4 1. OUTER DIMENSION.........................................................................................................................................4 2. FEATURE DIAGRAM ........................................................................................................................................5 INSTALLATION ...................................................................................................................................................................6 OPERATIONS AND FUNCTIONS.......................................................................................................................................7 DISASSEMBLY AND ASSEMBLY......................................................................................................................................8 INTERLOCK MECHANISM AND ADJUSTMENT.............................................................................................................15 TROUBLE SHOOTING GUIDE .........................................................................................................................................16 MEASUREMENT AND TEST ............................................................................................................................................18 1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT ........................................................................18 2. MICROWAVE RADIATION TEST ...................................................................................................................19 3. COMPONENT TEST PROCEDURE ...............................................................................................................20 WIRING DIAGRAM............................................................................................................................................................21 EXPLODED VIEW AND PARTS LIST...............................................................................................................................22
1
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 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.
2
SPECIFICATIONS
MODEL POWER SUPPLY MICROWAVE POWER CONSUMPTION GRILL COMBINATION MICROWAVE ENERGY OUTPUT MICROWAVE FREQUENCY OUTSIDE DIMENSIONS (W X H X D) CAVITY DIMENSIONS (W X H X D) NET WEIGHT TIMER FUNCTION SELECTIONS POWER SELECTIONS CAVITY VOLUME * SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE. 800W 2450MHz 465 x 279 x 360 mm (18.3 x 11.0 x 14.2 in.) 290 x 220 x 306 mm (11.4 x 8.7 x 12.0 in.) Approx. 12.5 kg (27.6 Ibs.) 35 min. DUAL SPEED MICROWAVE 5 LEVELS 0.7 Cu. Ft. KOR-63U50S/63V50S/63W50S/63X50S 230V, 50Hz, SINGLE PHASE WITH EARTHING 1200 W
3
EXTERNAL VIEW
1. OUTER DIMENSION
465
360
279
4
2. FEATURE DIAGRAM
35
4
1
9 0
2
78 6
q
1. SAFETY INTERLOCK SYSTEM 2. DOOR VIEWING SCREEN Allows viewing of food. The screen is designed so that light can pass throught, but not the microwave. 3. DOOR HOOK When the door is closed, it will automatically shut. If the door is opened while the oven is operating, the magnetron will immediately stop operating. 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 spedial heat resistant glass. Food in a proper receptacle is placed on this tray foor 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 functions. 11. DOOR RELEASE BUTTON By pushing this button the latch system cut off all circuits and stops the oven before the door is opened.
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 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 6 amperes, 230Volts, 50Hz.
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 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 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 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.
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. 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 mayu 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 affect 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 poition and timer knob turns to the desired position, the V.P.C switch has a cycle (ON/OFF time(sec.)) listed below. Variable power cooking MAX 540W 380W 230W 120W (HIGH) (MED HIGH) (MEDIUM) (DEFROST) (WARM) ON/OFF time (sec.) 30/0 23.2/6.8 16.5/13.5 9.8/20.2 5/25 Approximate Percentage of Power 100% 77% 55% 33% 17%
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 safe during normal operation. However, carelessness in servicing the oven can result in an electric shock or possible danger from a short circuit. You are asked to observe the following precautions carefully. 1. Always remove the power plug from the outlet before servicing. 2. Use an insulated screwdriver and 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 two-wire extension cord. The microwave oven is designed to be used while earthed. It is imperative, therefore, to make sure it is earthed properly before beginning repair work. (2) Warning about the electric charge in the high voltage capacitor. For about 30 seconds after the operation 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.
WARNING : 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.
8
1. To remove cabinet
1) Remove three screws on cabinet back. 2) Push the cabinet backward.
2. To remove door assembly
1) Remove a 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.
9
3. To remove door parts.
REF NO. A01
PART CODE 3512202040 3512202010 3512202070 3512202030 3512202050
PART NAME FRAME DOOR FRAME DOOR FRAME DOOR FRAME DOOR FRAME DOOR BARRIER-SCREEN *0 BARRIER-SCREEN *0 BARRIER-SCREEN *0 SUPPORTER BARR-S *0 STOPPER HINGE *T AS DOOR WELD AS BARRIER-SCREEN *1 GASKET DOOR HOOK SPRING HOOK
DESCRIPTION ABS SG-175, SG-0760D ABS SG-175, SG-0760D ABS SG-175, SG-0760D ABS SG-175, SG-0760D ABS SG-175, SG-0760D SAN T1.5 SAN T1.5 PETP T0.188 PP KOR-63150S KOR-61150S PE T0.1 PP POM RW1
Q'TY 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
REMARK KOR-63U50S KOR-63V50S KOR-63W50S KOR-63X50S KOR-63Y50S KOR-63U/W/X50S KOR-63V50S KOR-63Y50S KOR-63U/W/X50S
A02
3517006180 3517006120 3517003070
A03 A04 A05 A06 A07 A08 A09
3515304610 3515204100 3511705500 3517002800 3512300200 3513100700 3515101300
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 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 screws on stopper hinge top, and then push the door to contact the door seal to oven front surface. · Tighten a 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.
A
B
NOTE : A small gap may be acceptable if the microwave leakage does not exceed 4mW/cm2.
11
5. To remove control panel parts.
REF NO. A01
A02
A03 A04 A05 A06 A07 A08 A09
A10 A11 A12
PART CODE 3513402660 3513402620 3513402690 3513402680 3516709850 3516709810 3516709870 3516709840 3516709860 3515101600 3517400500 7122401211 3517400400 3518203800 7122401211 3513402560 3513402520 3513402590 3513402580 3513701420 3513701400 441G430171 3516903640 3516903620 3516903660 3516904430 3516903650
PART NAME KNOB VPC KNOB VPC KNOB VPC KNOB VPC CONTROL PANEL CONTROL PANEL CONTROL PANEL CONTROL PANEL CONTROL PANEL SPRING FLAT COUPLER VPC KNOB SCREW TAPPING CONTROL PANEL COUPLER VPC KNOB SCREW TAPPING KNOB KNOB KNOB KNOB LEVER DOOR OPEN LEVER DOOR OPEN SPRING BUTTON BUTTON DOOR OPEN BUTTON DOOR OPEN BUTTON DOOR OPEN BUTTON DOOR OPEN BUTTON DOOR OPEN
DESCRIPTION ABS XR-401, PA-777B/D ABS XR-401, PA-777B/D ABS XR-401, PA-777B/D ABS XR-401, PA-777B/D ABS XR-401, PA-777B/D ABS XR-401, PA-777B/D ABS XR-401, PA-777B/D ABS XR-401, PA-777B/D ABS XR-401, PA-777B/D SUS 301 T0.5 POM T2S TRS 4X12 MFZN POM KN35MKD 24E-P T2S TRS 4X12 MFZN ABS XR-401, PA-B/D ABS XR-401, PA-B/D ABS XR-401, PA-B/D ABS XR-401, PA-B/D PP PP SWP DIA. 0.7 ABS XR-401, PA-777B/D ABS XR-401, PA-777B/D ABS XR-401, PA-777B/D ABS XR-401, PA-777B/D ABS XR-401, PA-777B/D
Q'TY 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
REMARK KOR-63U/X50S KOR-63V50S KOR-63W50S KOR-63Y50S KOR-63U50S KOR-63V50S KOR-63W50S KOR-63X50S KOR-63Y50S
KOR-63U/X50S KOR-63V50S KOR-63W50S KOR-63Y50S KOR-63U/W/X/Y50S KOR-63V50S KOR-63U50S KOR-63V50S KOR-63W50S KOR-63X50S KOR-63Y50S
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.
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.
x 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.
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/cm2 for a fully assembled oven with door normally closed.
13
8. To remove wind guide assembly.
1) Remove a screw which secure the wind guide assembly. 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 reassembly.
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.
14
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. 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.
(3) Adjustment steps a) Loosen the one mounting screws. b) Adjust interlock switch assembly position. c) Make sure that lock lever moves smoothly after adjustment is completed. d) Tighten completely one mounting screws.
NOTE : Microwave emission test should be performed after adjusting interlock mechanism. If the microwave smission exceed 4mW/cm2, readjust interlock mechanism.
15
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 fan motor work when you shut the door and turn the timer? NO
YES (Refer to next page)
Does the fuse blow? NO
YES
Check continuity of interlock monitor switch with door shut. NO Continuity
Continuity
Replace primary, secondary interlock switch and interlock monitor switch.
Replace fuse and check continuity of both interlock switch's contact and monitor switch's conact with door partially open until monitor switch contact. Both continuity
NO
Replace primary, secondary interlock switch and interlock monitor switch.
Disconnect on side of the lead Normal wire connected from transformer to the high voltage capacitor, and operate oven.
Replace high voltage capacitor.
Fuse again
Replace high voltage transformer
If oulet has proper voltage, NO Continuity check continuity of power supply cord
Replace power supply cord
16
Does the fan motor work when you shut the door and turn the timer? YES
Does the oven lamp light? Does the thrutable turn? YES
NO
Replace primary, secondary interlock switch and interlock monitor switch.
Normal reading should be approx. 0
If microwave do not oscillate, check continuity of filament of magnetron.
NO Continuity
Check continuity filament tap (3.3V) of high voltage. Both continuity
NO
Replace high voltage transformer.
Check the diode for continuity in the reverse and normal directions.
Continuity in the reverse direction.
Replace high voltage diode.
Continuity
Replace magnetron.
Meter with 6V or higer voltage batteries should be used to check the normal direction resistance of the diode.
Check the isolation of fila- NO Good ment winding of high voltage transformer.
Replace high voltage transformer.
Good Replace manetron.
17
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 : P=4187 X vT/t · vT is difference between initial and ending temperature. · t is the heating time. The power measured should be B (Refer to SPECIFICATIONS)W±10.0%.
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: A(second) B(W) 70 600 64 650 60 700 56 750 52 800 49 850 47 900 44 950 42 1000 40 1050 38 1100
18
2. MICROWAVE RADIATION TEST
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.
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/cm2. 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.
19
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. 110±10% Filament winding....................................Approx. 0 Primary winding .....................................Approx. 2
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 once the capacitor is charged. (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.
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 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 0.1 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.
20
WIRING DIAGRAM
21
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
22
NO A00
B00
F01 F02 F03 F04 F05 F06 F07 F08 F09 F10 F11 F12 F13 F14 F15 F16 F17 F18 F19 F20 F21 F22 F23 F24 F25 F26 F27 F28 F29 F30 F31 F32 F33 F34 F35 F36 F37 F38 F39 F40 F41 F42 F43 F44 F45 F46 F47 F48
PART CODE 3511707950 3511706020 3511710210 3511707940 3511707990 3516711390 3516711330 3516719620 3516711380 3516718500 3510803600 7112401011 3516109560 7122401211 7122401211 7112401011 35113AEQ0D 4413A90012 7112401011 7122401211 4415D67620 4415D67120 3518606200 7121403011 3512517000 3963513100 3963512310 3511800300 3518002400 3516004000 7272400811 3513003200 3518302200 3518400900 3518701100 3518118320 3516003700 3510311710 7112401011 3512100900 7272400811 3515201101 7122401211 3518570400 5S762G10D0 5S762310D0 5S762G10D0 3513702600 3513811720 3513601600 7112401011 3966310100 3966310110 3518905300 3513003400 7272400811 3511406220 3517400620 3514700710 3512517300 3517203600
PART NAME DOOR AS DOOR AS DOOR AS DOOR AS DOOR AS CONTROL PANEL AS CONTROL PANEL AS CONTROL PANEL AS CONTROL PANEL AS CONTROL PANEL AS CABINET SCREW TAPPING CAVITY AS SCREW TAPPING SCREW TAPPING SCREW TAPPING CORD POWER AS CLAMP POWER CORD SCREW TAPPING SCREW TAPPING FUSE FUSE FILTER NOISE SCREW TAPPING GUIDE WIND MOTOR SHADE POLE MOTOR SHADE POLE FAN MAGNETRON SPECIAL SCREW SCREW TAPTITE HOLDER HV CAPACITOR CAPACITOR HV DIODE HV FUSE HV TRANS HV SPECIAL SCREW BASE SCREW TAPPING FOOT SCREW TAPTITE STOPPER HINGE *U SCREW TAPPING SW S/A RELAY SW MICRO SW MICRO SW MICRO LEVER LOCK LOCK LAMP SCREW TAPPING MOTOR SYNCRO MOTOR SYNCRO THERMOSTAT HOLDER THERMOSTAT SCREW TAPTITE COVER WAVE GUIDE COUPLER ROLLER GUIDE ROLLER TRAY
DESCRIPTION KOR-63U50S KOR-63V50S KOR-63W50S KOR-63X50S KOR-63Y50S KOR-63U50S KOR-63V50S KOR-63W50S KOR-63X50S KOR-63Y50S KOR-63'S T1 TRS 4X10 MFZN KOR-63U59S T2S TRS 4X12 MFZN T2S TRS 4X12 MFZN T1 TRS 4X10 MFZN 3X0.75 70X70 100-RTML NYLON66 T1 TRS 4X10 MFZN T2 TRS 4X12 MFZN 250V 12A 65TS 250V 12A MDA DWLF-M12 T2S PAN 4X30 MFZN PP 230V 17W OEM-10DWC2-A07 230V 20W MW 10CA-M02 PP+30%GLASS 2M218J(F) T2 BOLT FLANGE 5X12 DACRO TT3 TRS 4X8 MFZN SECC 2100VAC 0.98µF #187 HVR-1X-30B #187 5KV 0.55A HV- 41A55-02 DT-R80SO - 63T TT3 FLG HEX 4X8 MFZN SBHG T1 TRS 4X10 MFZN PP TT3 TRS 4X8 MFZN SCP-1 T2S TRS 4X12 MFZN DWSR-1 VP-533A-OFR SPNO #187 200G VP-531A-OFR-SZM-V16-FA-61 VP-533A-OFR SPNO #187 200G POM POM BL 240V 25W T25 C7A H187 TITRS 4 X 10 MFZN 220V 2.5W GM-16-24FD12 220V 2.5W M2LJ49ZT52 OFF:75 ON:65 H #187 NB PBT TT3 TRS 4X8 MFZN HEATPROOF PP XAREC TEFRON PP 5113MF6 A353B GLASS
SUPPLY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
REMARK
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DAEWOO ELECTRONICS CO., LTD.
686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: "DAEWOOELEC"
S/M NO. : R63U50S001
PRINTED DATE: Mar, 2002