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S/M No. : R63350S001
Service Manual
Microwave Oven
MODEL : KOR-63350S
KOR-86350S
DAEWOO ELECTRONICS CO., LTD
http : //svc.dwe.co.kr MAR. 2000
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
1. FOR SAFE OPERATION ............................................................................................................. 2 2. FOR SAFE SERVICE PROCEDURES ........................................................................................ 2
SPECIFICATIONS ............................................................................................................................ 3 EXTERNAL VIEW ............................................................................................................................ 4
1. OUTER DIMENSION(KOR-6335/KOR-8635) .............................................................................. 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 ........................................................................................................... 20
1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT ..................................................... 20 2. MICROWAVE RADIATION TEST ................................................................................................ 21 3. COMPONENT TEST PROCEDURE ............................................................................................ 22
WIRING DIAGRAM .......................................................................................................................... 23 EXPLODED VIEW AND PARTS LIST ............................................................................................. 24
1. DOOR ASSEMBLY ...................................................................................................................... 24 2. CONTROL PANEL ASSEMBLY ................................................................................................... 24 3. TOTAL ASSEMBLY ...................................................................................................................... 24
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 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 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 manafacterer immediately.
IMPORTANT
The wire in this mains lead coloured in accordance with the following code. Green-and-yellow : Earth Blue : Neartral Brown. : live As the colours of the wires in the manins lead of this appliance may not correspond with the coloured makings 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 ` , earth symbol or coloured green-and-yellow. E' The wire which is coloured blue must be connected to the terminals which is marked with the letter ` or coloured black. N' The wire which is coloured brown must be connected to the terminal which is marked with the letter ` or coloured red. L'
NOTE
The oven is desigend for counter-top use only.
2
SPECIFICATIONS
MODEL POWER SUPPLY POWER CONSUMPTION MICROWAVE 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 0.7 Cu.Ft. 465 x 279 x 365 mm (18.3 x 11.0 x 14.4 in.) 290 x 220 x 306 mm (11.4 x 8.7 x 12.0 in) APPROX. 13Kg(28.7 lbs.) MICROWAVE 5 LEVELS 0.9 Cu.Ft. 35min. DUAL SPEED 800W 2450MHz 495 x 294 x 392 mm (19.5 x 11.6 x 15.4 in.) 320 x 244 x 338 mm (12.6 x 9.6 x 13.3 in) APPROX. 15Kg(33.1 lbs.) 900W KOR-6335 1200W KOR-8635 1350W 230V ~ 50Hz, SINGLE PHASE WITH EARTHING
* SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.
3
EXTERNAL VIEW
1. OUTER DIMENSION(KOR-6335/KOR-8635)
2. FEATURE DIAGRAM
5 4 1
9
10
3
2
6
7
8
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. If the door is opened while the oven 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 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 functions.
4
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 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 earthing wire with a earthing plug. The plug must be plugged into an outlet that is properly installed and earthed.
WARNING
Improper use of the earthing plug can result in a risk of electric shock. Consult a qualified electrician or serviceman if the earthing instructions are not completely understood, or if doubt exists as to whether the appliance is properly earthed, and either: If it is necessary to use an extension cord, use only a 3-wire extension cord that has a 3-blade earthing plug, and a 3-slot receptacle that will 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.
5
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 recomended 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 adujst the timer to the desired time. 7. When the timer reaches zero, a bell will ring and the unit will
NOTE
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.
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. Make sure the oven is properly installed and plugged into the electrical outlet.
Variable power cooking
On and OFF cycle time of mechanical V.P.C switch is 30 seconds. When the V.P.C knob is set to the desired position and timer knob turns to the desired position, the V.P.C switch has a cycle (ON/OFF time(sec.)) listed below.
Variable power setting POWER LEVEL Symbol KOR-6335 KOR-8635 ON/OFF time (sec.) Approximate Percentage of power
HIGH MED-HIGH MEDIUM DEFROST WARM
MAX 610W 440W 260W 130W
MAX 690W 490W 290W 150W
30/0 23.2/6.8 16.5/13.5 9.8/20.2 5/25
100 % 77 % 55 % 33 % 17 %
**
**
6
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 earthed. Do not operate on a two-wire extension cord. The microwave oven is designed to be used with earthed. It is imperative, therefore, to 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.
SHORT
CAUTION
Service personnel should remove their watches whenever working close to or replacing the magnetron.
WARNING
When servicing th 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, HVFuse.
7
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 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. To remove door parts.
A06 A05 A04 A03 A02 A01
A07 A08
(1) KOR-63350S
REF NO. A01 A02 A03 A04 A05 A06 A07 A08 PART CODE 3512203860 3517005630 3515204100 3511705500 3517002800 3512300200 3513100700 3515101300 PART NAME FRAME DOOR BARRIER-SCREEN*O STOPPER HINGE*T AS DOOR WELD AS BARRIER-SCREEN*I GASKET DOOR HOOK SPRING HOOK ABS SG-175 SAN KOR-63150S KOR-61150S POLYESTER T0.1 PP POM PW1 DESCRIPTION Q' TY 1 1 1 1 1 1 1 1 REMARK
8
DISASSEMBLY AND ASSEMBLY
(2) KOR-86350S
REF NO. PART CODE PART NAME DESCRIPTION Q'TY REMARK
A01 A02 A03 A04 A05 A06 A07 A08
3512204170 3517005740 3515204100 3511705620 3517002900 3512300400 3513100700 3515101300
FRAME DOOR BARRIER-SCREEN *O STOPPER HINGE *T AS DOOR WELD AS BARRIER-SCREEN *I GASKET DOOR HOOK SPRING HOOK
ABS SG-175 SAN KOR-63150S KOR-81250S POLYESTER T0.1 PP POM PW1
1 1 1 1 1 1 1 1
(1) Remove the gasket door from door plate. (2) Remove the barrier screen inner from door plate. (3) Remove the door frame from door plate. (4) Remove the stopper hinge top from door plate. (5) Remove the spring and the hook. (6) Remove the supporter barrier screen outer from door frame. (7) Remove the barrier screen outer from door frame. (8) 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. Tighten a screw. (2) To reduce gap located on part ` B' Loosen two screws on stopper hinge under, and then push the door to contact the door seal to oven front surface. Tighten a screw.
A
B
NOTE
A small gap may be acceptable if the microwave leakage does not exceed 4mW/cm 2
9
DISASSEMBLY AND ASSEMBLY
5. To remove control panel parts.
B01
B02
B03
B04
B05
B06
B07
B08
B09
(1) KOR-63350S
REF NO. B01 B02 B03 B04 B05 B06 B07 B08 B09 PART CODE 3513402650 3516723720 3515101600 3517400530 7122401211 3517400400 3518203800 7122401211 3513402550 PART NAME KNOB VPC DECORATOR - PANEL SPRING FLAT COUPLER VPC KNOB SCREW TAPPING COUPLER TIMER TIMER SCREW TAPPING KNOB DESCRIPTION ABS XR-401, H-2938 ABS SG-175 SUS 301 T0.5 POM T2S TRS 4 x 12 MFZN POM KN35MKD 24E-P T2S TRS 4x12 MFZN ABS XR-401 H-2938 Q'TY 1 1 1 1 1 1 1 1 1 REMARK
(2) KOR-86350S
REF NO. PART CODE PART NAME DESCRIPTION Q'TY REMARK
B01 B02 B03 B04 B05 B06 B07 B08 B09
3513402650 3516720270 3515101600 3517400530 7122401211 3517400400 3518203800 7122401211 3513402550
KNOB VPC CONTROL - PANEL SPRING FLAT COUPLER VPC KNOB SCREW TAPPING COUPLER TIMER TIMER SCREW TAPPING KNOB
ABS XR-401, H-2938 ABS SG-175 SUS 301 T0.5 POM T2S TRS 4 x 12 MFZN POM KN35MKD 24E-P T2S TRS 4 x 12 MFZN ABS XR-401 H-2938
1 1 1 1 1 1 1 2 1
10
DISASSEMBLY AND ASSEMBLY
1) Remove the screw which secure the control panel, push up two snap fits and draw forward the control panel assembly. 2) Remove the door open lever from thee 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 couple from the timer. 7) Remove the screw which secure the V.P.C coupler. 8) Pull out the V.P.C coupler, V.P.C knob and flat spring from the control panel. 9) Remove the door open button and button spring from the control panel. 10) Reverse the above steps for reassembly.
6. To remove high voltage capacitor.
1) Remove a screw which secure the grounding ring terminal of the H.V. diode and the capacitor holder. 2) Remove the H.V.diode from the capacitor holder. 3) Reverse the above steps for reassembly.
High voltage circuit wiring
7. To remove magnetron.
1) Remove a screw which secure the magnetron. 2) Remove the magnetron. 3) Reverse the above steps for reassembly.
11
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/cm 2 for a fully assembled oven with door normally closed.
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.
12
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
1) Loosen the one mounting screw. 2) Adjust interlock switch assembly position. 3) Make sure that lock lever moves smothly after adjustment is completed. 4) Tighten completely one mounting screw.
NOTE
Microwave emission test should be performed after adjusting interlock mechanism. If the microwave emission exceed 4mW/cm 2 , readjust interlock mechanism.
13
TROUBLE SHOOTING GUIDE
Following the procedure below to check if the oven is defective or not.
1. Check grounding before checking trouble. 2. Be careful of the high voltage circuit. 3. Discharge the high voltage capacitor. 4. When checking the continuity of the switches, fuse or high voltage transformer, disconnect one lead wire from these parts and check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.
(TROUBLE 1) Door shut, timer set, but no cooking takes place.
Does the fan motor work when you shut the door and turn the timer?
YES (Refer to next page)
NO
Does the fuse blow?
YES
Check continuity of interlock monitor switch with door shut.
Continuity
NO
NO 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
Replace primary, secondary interlock switch and interlock monitor switch.
Both continuity
Disconnect one side of the lead wire connected from transformer to the high voltage capacitor, and operate oven.
Normal
Replace high voltage capacitor.
Fuse again
Replace high voltage transformer
If outlet has proper voltage, check continuity of power supply cord.
NO Continuity
Replace power supply cord.
14
TROUBLE SHOOTING GUIDE
Does the fan motor work when you shut the door and turn the timer? YES Does the oven lamp light? Does the turntable turn? YES NO Replace or repair oven lamp, turntable motor.
Normal reading should be approx. 0 NO Continuity
If microwave do not oscillate, check continuity of filament of magnetron. Poor continuity
Check continuity filament tap (3.3V) of high voltage. Continuity Check the diode for continuity in the reverse and normal directions. Continuity Meter with 6V or higher voltage batteries should be used to check the normal direction resistance of the diode.
NO Continuity
Replace high voltage transformer.
Continuity in the reverse direction.
Replace high voltage diode.
Replace magnetron.
Check the isolation of filament winding of high voltage transformer. Good
NO Good
Replace high voltage transformer.
Replace magnetron.
15
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 (50 + 3.6 ) 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 T/t 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%.
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 (68 + 3.6 )
* 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
16
MEASUREMENT AND TEST
2. MICROWAVE RADIATION TEST WARNING
Make sure to check the microwave leakage before and after repair of adjustment. Always start measuring of an unknown field to assure safety for operating personnel from microwave energy. Do not place your hands into any suspected microwave radiation field unless the safe density level is known. Care should be taken not to place the eyes in direct line with the source of microwave energy. Slowly approch the unit under test until the radiometer readds an appreciable microwave leakage from the unit under the test.
PROCEDURES
1. Prepare Microwave Energy Survey, 600cc glass beaker, and glass thermometer 100 (212 ).
_ _ 2. Pour 275cc + 15cc of tap water initially at 20 + 5
_ (68 + 9
)
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. 2) When measuring the leakage, always use the 5cm(2 in.) 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.
17
MEASUREMENT AND TEST
3. COMPONENT TEST PROCEDURE
High voltage is present at the high voltage terminal of the high voltage transformer during any cooking cycle. It is neither necessary nor advisable to attempt measurement of the high voltage. Before touching any oven components or wiring, always unplug the oven from its power source and discharge the capacitor.
1. High voltage transformer
(1) Remove connections from the transformer terminals and check continuity. (2) Normal readings should be as follows: Secondary winding ........................ Approx. 110 _ + 10% Filament winding ............................................... Approx. 0 Primary winding ................................................ Approx. 0
2. High voltage capacitor
(1) Check continuity of capacitor with meter on the hightest 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 amy be read in both directions. A normal diode' resistance will be infinite in one direction and several hundred K s 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.
18
WIRING DIAGRAM
19
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
F01
F02
F03
F04
F05
F06
F07
F08
F09
F10
F48
F47
F11
F46 F45 F44
F12
F13 F14
F43 F15
F16 F17 A00 F18 F19 F20 F21 F22
B00
F23
F24
F25
F42
F41
F40
F39
F38
F37
F36
F35
F34
F33
F32
F31
F30
F29
F28
F27
F26
20
EXPLODED VIEW AND PARTS LIST
(1) KOR-63350S
REF 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 PART CODE 3511712170 3516719670 3510801310 7112401011 3516109000 3516111900 7122401211 7122401211 7112401011 35113AEQ0D 4413A90012 7112401011 7122401211 4415D67620 4415D67120 3518606200 7121403011 3963513100 3963512310 3512517000 3511800300 3518002200 3516004000 7S422X4081 3513003200 3518302200 3518400400 3518701100 3518113700 3516003700 3510311700 7112410011 3512100900 7S422X4081 3515201101 7122401211 3518570400 4415A17352 4415A66910 4415A17352 3513702600 3513811710 3513601600 PART NAME DOOR AS CONTROL-PANEL AS CABINET SCREW TAPPING CAVITY WELD AS CAVITY JOINT AS SCREW TAPPING SCREW TAPPING SCREW TAPPING CORD POWER AS CLAMP POWER CORD SCREW TAPPING SCREW TAPPING FUSE FUSE NOISE-FILTER SCREW TAPPING MOTOR SHADED POLE MOTOR SHADED POLE GUIDE WIND FAN MAGNETRON SPECIAL SCREW SPECIAL SCREW HOLDER HV CAPACITOR CAPACITOR HV DIODE HV FUSE HV TRANS HV SPECIAL SCREW BASE SCREW TAPPING FOOT SPECIAL SCREW STOPPER HINGE *U SCREW TAPPING SWITCH S/A*RELAY SW MICRO SW MICRO SW MICRO LEVER LOCK LOCK LAMP DESCRIPTION KOR-63350S KOR-63350S PCM T0.6 GE T1 TRS 4X10 MFZN CAVITY WELD AS CAVITY WELD AS T2S TRS 4X12 MFZN T2S TRS 4X12 MFZN T1 TRS 4X10 MFZN 3X0.75 70X70 100-RTML NYLON 66 T1 TRA 4X10 MFZN T2S TRS 4X12 MFZN 250V 12A 65TS 250V 12A MDA DWLF-M12 T2S PAN 4X30 MFZN 230V 17W OEM-10DWC2-A07 230V 20W MW 10CA-M02 PP PP+30% GLASS 2M218HF T2 BOLT FLANGE 5X12 DACRO TT2 TRSLL 4X8 SE MFZN SECC T0.6 2100VAC 0.98uF #187 HVR-1X-3AB 12KV #187 5KV 0.55A HV-41A55-02 DY-N80S0-63T TT3 HEX 4X8 FLG MFZN SBHG T0.8 T1 TRS 4X10 MFZN PP DASF-130 TT2 TRS 4X8 MFZN SCP-1 T2.5 T2S TRS 4X12 MFZN DWSR-1 VP-533A-OF SPNO #187 200G VP-531A-OF/SZM-V16-FA-61 VP-533A-OF SPNO #187 200G POM POM BL 240V 25W T25 C7A H187 SUPPLY 1 1 1 3 1 1 1 2 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 4 1 5 2 1 1 1 1 1 1 1 1 1 1 REMARK
21
EXPLODED VIEW AND PARTS LIST
REF NO. F39 F40 F41 F42 F43 F44 F45 F46 F47 F48
PART CODE 7121400611 3966310100 3966310100 3518905300 3513003400 3516003700 3511406200 3717400620 3514700710 3512517300 3517203600
PART NAME SCREW TAPPING MOTOR SYNCRO MOTOR SYNCRO THERMOSTAT HOLDER THERMOSTAT SPECIAL SCREW COVER WAVE GUIDE COUPLER ROLLER GUIDE ROLLER TRAY
DESCRIPTION T2S PAN 4X6 MFZN 220V 2.5W GM-16-24FD12 220V 2.5W M2LJ49ZT52 OFF:75 ON:65 H #187 NB PBT TT3 HEX 4X8 FLG MFZN HEATPROOF PP XAREC TEFLON PP 5113MF6 A353B GLASS
SUPPLY 1 1 1 1 1 1 1 3 1 1
REMARK
22
EXPLODED VIEW AND PARTS LIST
(2) KOR-86350S
REF 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 PART CODE 35117127720 3516720550 3510801430 7112401011 3516109200 3516109700 7122401211 7122401211 7112401011 35113AEQ0D 4413A90012 7112401011 7122401211 4415D67620 4415D67120 3518606200 7121403011 3963513100 3963512310 3512517000 3511800300 3518002200 3516004000 7S422X4081 3513003200 3518302200 3518400400 3518701100 3518114000 3516003700 3510311900 7112410011 3512100900 7S422X4081 3515201101 7122401211 3518570400 4415A17352 4415A66910 4415A17352 3513702600 3513811710 3513601600 PART NAME DOOR AS CONTROL-PANEL AS CABINET SCREW TAPPING CAVITY WELD AS CAVITY JOINT AS SCREW TAPPING SCREW TAPPING SCREW TAPPING CORD POWER AS CLAMP POWER CORD SCREW TAPPING SCREW TAPPING FUSE FUSE NOISE-FILTER SCREW TAPPING MOTOR SHADED POLE MOTOR SHADED POLE GUIDE WIND FAN MAGNETRON SPECIAL SCREW SPECIAL SCREW HOLDER HV CAPACITOR CAPACITOR HV DIODE HV FUSE HV TRANS HV SPECIAL SCREW BASE SCREW TAPPING FOOT SPECIAL SCREW STOPPER HINGE *U SCREW TAPPING SWITCH S/A*RELAY SW MICRO SW MICRO SW MICRO LEVER LOCK LOCK LAMP DESCRIPTION KOR-86350S KOR-86350S PCM T0.6 GE T1 TRS 4X10 MFZN CAVITY WELD AS CAVITY WELD AS T2S TRS 4X12 MFZN T2S TRS 4X12 MFZN T1 TRS 4X10 MFZN 3X0.75 70X70 100-RTML NYLON 66 T1 TRA 4X10 MFZN T2S TRS 4X12 MFZN 250V 12A 65TS 250V 12A MDA DWLF-M12 T2S PAN 4X30 MFZN 230V 17W OEM-10DWC2-A07 230V 20W MW 10CA-M02 PP PP+30% GLASS 2M218HF T2 BOLT FLANGE 5X12 DACRO TT2 TRSLL 4X8 SE MFZN SECC T0.6 2100VAC 0.98uF #187 HVR-1X-3AB 12KV #187 5KV 0.55A HV-41A55-02 DW-N90S0-86T TT3 HEX 4X8 FLG MFZN SBHG T0.8 T1 TRS 4X10 MFZN PP DASF-130 TT2 TRS 4X8 SE MFZN SCP-1 T2.5 T2S TRS 4X12 MFZN DWSR-1 VP-533A-OF SPNO #187 200G VP-531A-OF/SZM-V16-FA-61 VP-533A-OF SPNO #187 200G POM POM BL 240V 25W T25 C7A H187 SUPPLY 1 1 1 3 1 1 1 2 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 4 1 5 2 1 1 1 1 1 1 1 1 1 1 REMARK
23
EXPLODED VIEW AND PARTS LIST
REF NO. F39 F40 F41 F42 F43 F44 F45 F46 F47 F48
PART CODE 7121400611 3966310100 3966310110 3518905300 3513003400 3516003700 3511406200 3717400620 3514700710 3512517300 3517203500
PART NAME SCREW TAPPING MOTOR SYNCRO MOTOR SYNCRO THERMOSTAT HOLDER THERMOSTAT SPECIAL SCREW COVER WAVE GUIDE COUPLER ROLLER GUIDE ROLLER TRAY
DESCRIPTION T2S PAN 4X6 MFZN 220V 2.5W GM-16-24FD12 220V 2.5W M2LJ49ZT52 OFF:75 ON:65 H #187 NB PBT TT3 HEX 4X8 FLG MFZN HEATPROOF PP XAREC TEFLON PP 5113MF6 A353B GLASS
SUPPLY 1 1 1 1 1 1 1 3 1 1
REMARK
24
DAEWOO ELECTRONICS CO., LTD
686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX : DWELEC K28177-8 CABLE : " DAEWOOELEC" FAX : 02)360-7877 TEL : 02)360-7804 E-mail : [email protected] // PRINTED DATE : MAR. 2000