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Summary of Contents for Daewoo KOR-1B4H9A04
- Page 1 S/M No. : R1B4H0A002 Service Manual Microwave Oven MCD1311ST Model: KOR-1B4H0A EW13F1ST KOR-1B4H9A04 DAEWOO ELECTRONICS CO., LTD. http : //svc.dwe.co.kr Mar. 2002...
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Page 2: Table Of Contents
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 if 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. -
Page 3: Safety And Precautions
SAFETY AND PRECAUTIONS CAUTION : This Device is to be Serviced Only by Properly Qualified Service Personnel. Consult the Service Manual for Proper Service Procedures to Assure Continued Safety Operation and for Precautions to be Taken to Avoid Possible Exposure to Excessive Microwave Energy. 1. -
Page 4: Specifications
SPECIFICATIONS MODEL KOR-1B4H0A KOR-1B4H9A04 POWER SUPPLY 120V~60HZ, SINGLE PHASE WITH EARTHING MICROWAVE 1500 W 1400 W POWER GRILL CONSUMPTION COMBINATION MICROWAVE ENERGY OUTPUT 1100 W 1000W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W X H X D) 560X344X471mm (22.0X13.5X18.5 in.) CAVITY DIMENSIONS (W X H X D) 369X246X394mm (14.5X9.7X15.5 in.) -
Page 5: External View
EXTERNAL VIEW 1. OUTER DIMENSION... -
Page 6: Feature Diagram
2. FEATURE DIAGRAM 1. DOOR SEAL Door seal maintains the microwave within the oven cavity and prevents microwave leakage. 2. DOOR HOOK When door is closed, it will automatically lock shut. If door is opened while oven is operating, magnetron tube will immediately stop operating. -
Page 7: Control Panel
3. CONTROL PANEL DEF TIMER LOCK FROZEN DINNER POPCORN PIZZA PLATE MORE LESS FRESH FROZEN BEVERAGE VEGETABLE VEGETABLE MEAT POULTRY FISH POWER DEFROST KITCHEN CLOCK TIMER START/ STOP/CLEAR SPEEDY COOK 1. Time set pad - Used to set the cooking time and the present time. 2. -
Page 8: Installation
INSTALLATION 1. Steady, flat location. This microwave oven should be set on a steady, flat surface. 2. Leave space behind and side. All air vents should be kept a clearance. If all vents are covered during operation, the oven may be overheated and, eventually, cause oven failure. -
Page 9: Operations And Functions
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. -
Page 10: Disassembly And Assmbly
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. - Page 11 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.
- Page 12 3. To remove door parts. REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK 3512604200 HANDLE DOOR ALUMINUM 3515307400 SUPPORTER HANDLE KOC-1B4K0S 3511605510 DECORATOR DOOR *U STS304 T0.5 3511605400 DECORATOR DOOR *T STS304 T0.5 3511605700 DECORATOR DOOR *L STS304 T0.5 3511605600 DECORATOR DOOR *R STS304 T0.5...
- Page 13 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. •...
- Page 14 5. To remove control panel parts. REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK 3518523400 SWITCH MEMBRANE KOR-1B4H0A 3511607600 DECORATOR C-PANEL STS430 HL T0.5 3516727000 CONTROL PANEL ABS AF-348, VT-0826 3514326500 PCB AS KOR-1B4H0A 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN (1) Remove the screw which secure the control panel, push up two snap fits and draw forward the control panel assembly.
- Page 15 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.
- Page 16 8. To remove wind guide assembly. 1) Remove a screw which secure the wind guide assembly. 2) Draw forward the wind guide assembly. 3) Pull the fan from the motor shaft. 4) Remove two screws which secure the motor shaded pole. 5) Remove the motor shaded pole.
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Page 17: Interlock Mechanism And Adjustment
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. -
Page 18: Trouble Shooting Guide
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 tranformer, disconnect one load wire from these parts and check continuity with the AC plug removed. - Page 19 CONDITION CHECK RESULT CAUSE REMEDY Replace Defective Outlet has Check continuity of magnetron Continuity magnetron proper voltage Fuse does not Replace blow. Open power Check continuity of Continuity supply cord power supply cord Replace Normal Defective touch control circuit Replace Display do not shown Malfunction of countdown...
- Page 20 (TROUBLE 3) No microwave oscillation even though fan motor rotates. CONDITION CHECK RESULT CAUSE REMEDY Continuity Replace Check continuity of high Defective high microwave voltage capacitor terminals voltage oscillation with wires removed transformer Continuity in Replace Check continuity of high voltage Defective high backward rectifier in forward and backward...
- Page 21 (TROUBLE 4) The following visual conditions inditions indicate a probable defective touch control circuit or membrane switch assembly 1. Incomplete segments, 1) Segments missing. 2) Partical segments missing. 3) Digit flickering other than normal display slight flickering. 4) " :0" does not display when power is on. 2.
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Page 22: Mesurement And Test
MEASUREMENT AND TEST 1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT Microwave output power can be checked by indirectly mmeasuring 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 100 ±... -
Page 23: Microwave Radiation Test
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. -
Page 24: Component Test Procedure
1) Remove connections from the transformer terminals and check continuity. 2) Normal readings should be as follows : Secondary winding ... Approx. 110 Ω ±10% (100 Ω ±10% ÷ KOR-1B4H9A04) Filament winding ... Approx. 0 Ω Primary winding ... Approx. 1 Ω... -
Page 25: Wiring Diagram
WIRING DIAGRAM KOR-1B4H0A... - Page 26 KOR-1B4H9A04...
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Page 27: Printed Circuit Board
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: 120V / Frequency: 60Hz Terminal Voltage LOAD NO LOAD AC 12.6 V AC 14.7 V NOTE 1. - Page 28 Mesure point...
- Page 29 3. When there is no microwave oscillation 1) When touching START pad, oven lamp does not turn on. Fan motor do not rotate, but cook indicator in display comes on. Cause : RELAY 2 does not operate. refer to Circuit Diagram (point 3) - Check method POINT STATE...
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Page 30: Pcb Circuit Diagram
2. P.C.B. CIRCUIT DIAGRAM... -
Page 31: Location No
3. P.C.B. LOCATION NO. NAME SYMBOL SPECIFICATION PART CODE Q’TY BUZZER BM-20K 3515600100 C ARRAY 7P(6) 102 M 50V CN6XB-102M CAPACITOR ELEC 50V RS 1µF CEXE1H109V CPAPCITOR ELEC 25V RSS 1000µF CEXF1E102V CONNECTOR WAFER YW396-02AV 3519150520 CONNECTOR WAFER YW396-05AV 3519150510 CONNECTOR WAFER FCZ 254-11 441M367160... -
Page 32: Exploded View And Parts List
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... - Page 33 7122401011 SCREW TAPPING T2S TRS 4*10 MFZN 35113UANT5 CORD POWER AS 3X14 AWG 60X60 120-RTML (KOR-1B4H0A) 35113TENM5 CORD POWER AS 3X16 AWG 70X70 100-RTML (KOR-1B4H9A04) 7122401211 SCREW TAPPING T2S TRS 4*12 MFZN FUSE 7121403011 SCREW TAPPING T2S PAN 4X30 MFZN...
- Page 34 7272400811 SCREW TAPTITE TT3 TRS 4X8 MFZN 3511408300 COVER WAVE GUIDE MICA T0.35 3517402000 COUPLER QUESTRA 3514700710 ROLLER TEFLON 3512517200 GUIDE ROLLER 3517207600 TRAY DIA:340 1300G 3518902900 THERMOSTAT OFF:144˚C #187V (Only KOR-1B4H9A04) 7121300611 SCREW TAPPING T2S PAN 3X6 (Only KOR-1B4H9A04)
- Page 35 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. : R1B4H0A002 PRINTED DATE: Mar, 2002...
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