S/M No. : R1A6S9S001 Service Manual Microwave Oven Model: KOR-1A6S9S ✔ Caution : In this Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information,please refer to PPL(Parts Price List) in Service Information Center (http://svc.dwe.co.kr). http : //svc.dwe.co.kr Mar.
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.
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.
SPECIFICATIONS MODEL KOR-1A6S9S POWER SUPPLY POWER CONSUMPTION 230V-50Hz, SINGLE PHASE WITH EARTHING MICROWAVE 1400W GRILL COMBINATION MICROWAVE ENERGY OUTPUT 1000W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W X H X D) 539 x 300 x 406 mm (21.2 x 11.8 x 16.0 in) CAVITY DIMENSIONS (W X H X D) 354 x 228 x 373 mm (13.9 x 9.0 x 14.7 in) NET WEIGHT APPROX. 15.5 kg (34.1 Ibs.) TIMER 59 min. 99 sec. FUNCTION SELECTIONS MICROWAVE POWER SELECTIONS 10 LEVELS CAVITY VOLUME 1.0 Cu. Ft.
EXTERNAL VIEW 1.
2. FEATURE DIAGRAM 1 2 3 4 5 6 9 7 8 1 Door latch - When the door is closed it will automatically shut off. If the door is opened while the oven is operating, the magnetron will automatically shut off. 2 Door seal - The door seal maintains the microwave within the oven cavity and prevents microwave leakage. 3 Oven cavity 4 Spatter shield - Protects the microwave outlet from splashes of cooking foods. 5 Safety interlock system - Prevents the oven from operating while the door is opened.
3. CONTROL PANEL 2 3 7 6 4 1 e w 0 9 5 8 q 1 Time set pad - Used to set the cooking time and the present time. 2 Display - Cooking time, power level, indicators and present time are displayed. 3 Sensor cook - Used to automatically compute the microwave power and cooking time for foods. 4 Auto cook - Used to cook or reheat. 5 Help - Used to help you to operate the oven easily. 6 Time defrost - Used to defrost food. (for time) 7 Auto defrost - Used to defrost foods.
INSTALLATION 1. Steady, flat location. This microwave oven should be set on a steady, flat surface. This microwave oven is designed for counter top use only. 2. Leave space behind and side. All air vents should be kept a clearance. If all vents are covered during operation, the oven may overheat and, eventually, cause failure. 3. Away from radio, and TV sets Poor television reception and radio interference may result if the oven is located close to a TV, radio, antenna, or feeder and so on.
OPERATIONS AND FUNCTIONS This section includes useful information about oven operation. 1. Plug power supply cord into a standard 3- pronged 12 Amp, 230V AC 50Hz power outlet. 2. After placing the food in a suitable container, open the oven door and put it on the glass tray. The glass tray and roller guide must always be in place during cooking. 3. Shut the door. Make sure that it is firmly closed. 1 The oven light is on only when the microwave oven is operating.
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.
1. To remove cabinet 1) Remove three screws on cabinet back. 2) Push the cabinet backward. 2. To remove door assembly 1) Remove one screw 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.
✔ Caution: In this Service Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service information Center(http://svc.dwe.co.kr) 3. To remove door parts. REF NO. PART CODE PART NAME DESCRIPTION A01 3512204340 FRAME DOOR ABS SG-175 SG-0760D 1 A02 3517005900 BARRIER-SCREEN*0 PET T0.
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 two screws. A (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. B NOTE : A small gap may be acceptable if the microwave leakage does not exceed 4mW/cm2.
✔ Caution: In this Service Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service information Center(http://svc.dwe.co.kr) 5. To remove control panel parts. REF NO.
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.
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 reassembly. 9. To remove H.V.transformer. 1) Remove four screws holding the H.V.transformer. 2) Remove the H.V.transformer.
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.
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.
CONDITION Outlet has proper voltage Fuse does not blow. CHECK RESULT CAUSE REMEDY No Continuity Defective magnetron Replace Check continuity of magnetron Check continuity of noise filter board No Continuity Defective magnetron Replace Check continuity of power supply cord No Continuity Open power supply cord Replace Normal Defective touch control circuit Replace NOTE All these switches must be replaced at the same time, please refer to “Interlock Mechanism And Adjustment”.
(TROUBLE 3) No microwave oscillation even though fan motor rotates.
(TROUBLE 4) The following visual conditions indicate a probable defective touch control circuit or membrane switch assembly. 11. Incomplete segments (1) Segments missing (2) Partical segments missing (3) Digit flickering other than normal display slight flickering (4) A phrase does not display when power is on. 12. A distinct change in the display are not on when they numbers is the display. 13. One or more digits in the display are not on when they should be. 14.
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.
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.
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.
WIRING DIAGRAM 24
PRINTED CIRCUIT BOARD 1. CIRCUIT CHECK PROCEDURE 1. Low Voltage Transformer check • The low voltage transformer is located on the P.C.B. • Measuring condition: input voltage : 230V/Frequency : 50Hz Terminal Voltage 4-7 LOAD AC 13.5 V NO LOAD AC 32.0 V NOTE : 1. Refer to Circuit Diagram (point 4). 2. Secondary side voltage of the low voltage transformer changes in proportion to fluctuation of power source voltage. 3. The allowable tolerance of the secondary voltage is within ± 5% of nominal voltage. 2.
MP1 MP2 MP3 Measure Point 26
3. When there is no microwave oscillation 1) When touching START pad, oven lamp does not turn on. Fan motor does not rotate, but cook indicator in display comes on. * Cause : RELAY 2 does not operate. → refer to Circuit Diagram (Point 3) - Check method POINT A B RELAY 2 ON +5VDC GND RELAY 2 OFF GND +12VDC STATE 2) When touching START pad, oven lamp turns on. Fan motor and turntable rotate and cook indicator in display comes on. * Cause : RELAY 1 does not operate.
6. When Er01 & Er03 come on display. → Refer to Circuit Diagram (Point 6) -Check method * If AUTO REHEATING just operating, checking point A, B, C & D after 1~2 minutes. NO CHECK POINT REMARK Tolerance 1 A 0.5 ≤ VALUE ≤ 3.5V - 2 B 11.3Vdc ± 5% 3 C 4.4Vdc ± 5% 4 D 2.2Vdc ± 5% * R20~24 & connecting status of humidity sensor must be checked before checking point A, B, C & D. 7. When the oven is plugged in or during operation, the display does not turn on.
2.
✔ Caution: In this Service Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service information Center(http://svc.dwe.co.kr) 3. P.C.B. LOCATION NO. 1) KOR-1A6S9S NO.
NO. NAME SYMBOL SPECIFICATION PART CODE Q'TY 41 R CARBON FILM R24 1/6W 150K 1% RN-AZ1503F 1 42 R CARBON FILM R25 1/6W RN-AZ7502F 1 43 R CARBON FILM R1,31 1/4W 27 5% RD-4Z270J- 2 44 R CARBON FILM R33 1/4W 15 5% RD-4Z150J- 1 45 R CARBON FILM R32,34 1/4W 1K 5% RD-4Z102J- 2 46 R CARBON FILM R14,30 1/2W 200 5% SMALL RD-2Z201JS 2 47 RESONATOR CERA CR1 CRT4.
EXPLODED VIEW AND PARTS LIST 1. DOOR ASSEMBLY Refer to Disassembly and assembly. 2. CONTROL PANEL ASSEMBLY Refer to Disassembly and assembly. 3.
✔ Caution: In this Service Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service information Center(http://svc.dwe.co.
686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC” PRINTED DATE: Mar.
