Table of Contents
S/M No. : R1A7G9T001
Service Manual
Microwave Oven
Model: KOR-1A7G9T(AKM3180S)
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).
April. 2005
Table of Contents
Related Manuals for Daewoo KOR-1A7G9T(AKM3180S)
Summary of Contents for Daewoo KOR-1A7G9T(AKM3180S)
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Page 1: Microwave Oven
S/M No. : R1A7G9T001 Service Manual Microwave Oven Model: KOR-1A7G9T(AKM3180S) 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). -
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 micro- wave 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. -
Page 3: Safety And Precautions
SAFETY AND PRECAUTIONS CAUTION This device is to be Serviced only by Properly Qualified Service Personel. 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-1A7G9T (AKM3180S) POWER SUPPLY 110V-60Hz, SINGLE PHASE WITH EARTHING MICROWAVE 1400W POWER CONSUMPTION GRILL COMBINATION MICROWAVE ENERGY OUTPUT 1000W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W X H X D) 539 x 300 x 431mm (21.2 x 11.8 x 16.1 in) CAVITY DIMENSIONS (W X H X D) 354 x 228 x 373 mm (13.9 x 9 x 14.7 in) NET WEIGHT... -
Page 5: External View
EXTERNAL VIEW 1. OUTER DIMENSION... -
Page 6: Feature Diagram
2. FEATURE DIAGRAM 1 DOOR HOOK When the door is closed, it will automatically lock shut. If door is opened while oven is operating, magnetron tube will immediately stop operating. 2 DOOR SEAL Door seal maintains the microwave within the oven cavity and prevents microwave leakage. 3 OVEN CAVITY 4 OVEN LAMP Automatically turns on during oven operating. -
Page 7: Control Panel
3. CONTROL PANEL 1 DISPLAY - Cooking time, power level, indicators and the current time are displayed. 2 AUTO COOK - Used to cook or reheat many of favorite food. 3 ONE TOUCH COOK - Used to cook or reheat specific quantities of food. 4 +, - - Used to add or decrease time for cooking. -
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 mains 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 Assembly
DISASSEMBLY AND ASSEMBLY Cautions to be observed when troubleshooting. 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. - Page 11 1. To remove cabinet 1) Remove three screws on cabinet back. 2) Pull the cabinet backward. 2. To remove door assembly 1) Remove two screw 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 3512204370 FRAME DOOR ABS XR-401 SR-0320G 3517005930 BARRIER-SCREEN *O TEMP GLASS T3.2, NO PRINT 3515202900 STOPPER HINGE *T AS KOR-121M0A 3511711300 DOOR PAINTING AS KOR-1A1G0A 3517005800 BARRIER-SCREEN *I PETP T0.1 3512301900...
- 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 3518571900 SWITCH MEMBRANE KOR-1A7G9T 3516727510 CONTROL-PANEL ABS SG-175 SG-0760D PKMPMSFK40 PCB MAIN MANUAL AS 1A(1000W,T,9,99) 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN (1) Remove a screw which secure the control panel, push up two snap fits and draw forward the control panel assembly. (2) Remove four screws which secure the PCB assembly to control panel.
- 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 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.
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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: Troubleshooting Guide
TROUBLESHOOTING 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. - Page 19 CONDITION CHECK RESULT CAUSE REMEDY Replace Defective mag- Outlet has Check continuity of magnetron Continuity netron proper volt- age Fuse does not Replace blow. Open power sup- Check continuity of Continuity ply cord power supply cord Replace Normal Defective touch control circuit Replace Display do not shown...
- 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 trans- oscillation with wires removed former Continuity in Replace Check continuity of high voltage Defective high backward rectifier in forward and backward...
- Page 21 (TROUBLE 4) The following visual conditions 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: Measurement And Test
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. -
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
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. -
Page 25: Wiring Diagram
WIRING DIAGRAM... -
Page 26: 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 : 110V/Frequency : 60Hz Terminal Voltage LOAD NO LOAD 5-6-7 AC 12.6 V AC 14.7 V NOTE : 1. - Page 27 Measure Point...
- Page 28 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. (TRAY LAMP) - Check method POINT STATE RELAY 2 ON 5VDC RELAY 2 OFF 12VDC...
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Page 29: Pcb Circuit Diagram
2. PCB CIRCUIT DIAGRAM... -
Page 30: Pcb Location No
3. PCB LOCATION NO. NAME SYMBOL SPECIFICATION PART CODE Q’TY BUZZER BM-20K 3515600100 C ARRAY 7P(6) 1000PF M 50V CN6XB-102M CAPACITOR ELEC 50V RS 10UF CEXE1H100A CAPACITOR ELEC 25V RSS 1000MF CEXF1E102V CONNECTOR WAFER YW396-02V 3519150520 CONNECTOR WAFER FCZ 254-11 441M367160 CONNECTOR WAFER YW396-05AV... -
Page 31: 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 32 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). PART CODE PART NAME DESCRIPTION Q'TY...
- Page 33 DAEWOO ELECTRONICS CORP. 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC” S/M NO. : PRINTED DATE: April. 2005...