DAEWOO ELECTRONICS KQG-6L3B3S Service Manual
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DAEWOO ELECTRONICS KQG-6L3B3S Service Manual

DAEWOO ELECTRONICS KQG-6L3B3S Service Manual

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S/M No. :
Service Manual
Microwave Oven
Model: KQG-6L3B3S
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).
QG6L3B3S01
Nov. 2011

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Summary of Contents for DAEWOO ELECTRONICS KQG-6L3B3S

  • Page 1 S/M No. : QG6L3B3S01 Service Manual Microwave Oven Model: KQG-6L3B3S 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 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.

  • Page 4: Specifications

    SPECIFICATIONS POWER SUPPLY 230V AC, 50Hz SINGLE PHASE WITH EARTHING MICROWAVE 1100 W POWER GRILL 1050 W CONSUMPTION COMBINATION 2200 W MICROWAVE ENERGY OUTPUT 700 W MICROWAVE FREQUENCY 2,450 MHz OUTSIDE DIMENSIONS (WXHXD) 446 X 270 X 319 mm CAVITY DIMENSIONS (WXHXD) 295 X 194 X 303 mm NET WEIGHT APPROX.

  • Page 5: External View

    EXTERNAL VIEW 1. OUTER DIMENSION...

  • Page 6: Features Diagram

    2. FEATURES DIAGRAM 1 Door latch - When the door is closed, it will 9 Coupler - This fits over the shaft in the center of automatically shut off. If the door is opened while the oven cavity floor. This is to remain in the oven the oven is operating, the magnetron will for all cooking.

  • Page 7: Control Panel

    3. CONTROL PANEL 1 Display - Cooking time, power level, indicators 7 Clock - Used to set clock. and the current time are displayed. 8 One Touch Cook - Used to cook or reheat 2 Auto Cook - Used to cook or reheat many of specific quantities of food.

  • Page 8: Installation

    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.

  • Page 9: Operations And Functions

    OPERATION AND FUNCTIONS This section includes useful information about oven operation. a. Plug power supply cord into a 230V 50Hz power outlet. b. 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.

  • Page 10: Disassembly And Assembly

    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.
  • 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 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 3511729900 DOOR AS KQG-6L353S 3511706130 DOOR PAINTING AS KOR-6L0B1A 3517003700 BARRIER-SCREEN *I PE T0.1 3513100700 HOOK 3515101300 SPRING HOOK 3512211100 FRAME DOOR ABS SG-0760D, SG-175 3517011010 BARRIER-SCREEN *O TEMP GLASS T3.2 3512302700...
  • 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 the stopper hinge top, and then push the door to contact the door seal to the oven front surface.
  • Page 14 5. To remove control panel parts. REF. NO PART CODE PART NAME DESCRIPTION Q'TY REMARK PKCPSWFLH0 CONTROL-PANEL AS KQG-6L3B3S 3518572840 SWITCH MEMBRANE KQG-6L3B3S 3516738920 CONTROL-PANEL ABS SG-0760D SG-175 PKMPMSFL70 PCB MAIN MANUAL AS KQG-6L3B3S 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN...
  • 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 the screw for earthing. 2) Remove the noise filter from the wind guide. 3) Remove the 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.
  • Page 17 10. To remove tray motor. 1) Remove the coupler in the cavity. 2) Turn the set upside down. 3) Cut the tray motor cover part from the base plate. 4) Remove the tray motor cover. 5) Remove a screw which secure the tray motor. 6) Remove the tray motor.
  • Page 18 12. To remove heater parts. REF. NO PART CODE PART NAME DESCRIPTION Q'TY REMARK 3512808900 HEATER *T AS KQG-6L353S 3511415510 COVER HEATER *T SA1D T0.5 3512807330 HEATER QUARTZ 115V 500W 240MM B WADEN 3510613100 BRACKET HEATER *T SBHG T0.5 3512765100 HARNESS HEATER KOC-970T1S TEFLON...

  • Page 19: 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. Primary interlock switch...

  • Page 20: 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 21 CONDITION CHECK RESULT CAUSE REMEDY Replace Defective Outlet has Check continuity of Continuity magnetron noise filter board proper voltage Fuse does not Replace Check continuity of Open power blow. Continuity supply cord power supply cord Replace Normal Defective touch control circuit Replace Malfunction of Display do not shown...
  • Page 22 (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 23 (TROUBLE 4) The following visual conditions indicate a probable defective touch control circuit 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.

  • Page 24: 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. A cylindrical container of borosilicate glass is used for the test. It has a maximum thickness of 3mm, an external diameter of approximately 190mm and a height of approximately 90mm.

  • Page 25: 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 26: 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 27: Wiring Diagram

    WIRING DIAGRAM...

  • Page 28: 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: 230V / Frequency: 50Hz Terminal Voltage LOAD NO LOAD AC 12.6 V AC 14.7 V NOTE 1.
  • Page 29 Measure Point...
  • Page 30 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 STATE...

  • Page 31: Pcb Circuit Diagram

    2. PCB CIRCUIT DIAGRAM...

  • Page 32: 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 254-10 441M367150 CONNECTOR WAFER YW396-05AV...

  • Page 33: 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 34 3511200400 CLAMP WIRE SBHG 7S312X40A1 SCREW SPECIAL T1 TRS 4X10 SE MFZN 3518904900 THERMOSTAT OFF:90 ON:80 H #187 3512784020 HARNESS MAIN KQG-6L3B3S 3513818900 LOCK PP GP-3152F FH44D 3513702600 LEVER LOCK 4415A17352 SW MICRO VP-533A-OF SPNO #187 200G 4415A66600 SW MICRO...
  • Page 35 DAEWOO ELECTRONICS CORP. 1-2, Jeo-dong 1(il)-ga, Jung-gu, Seoul, Korea C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC” S/M NO. : PRINTED DATE: Nov. 2011...
  • Page 36 V V I I S S I I O O N N C C R R E E A A T T I I V V E E , , I I N N C C . . 서울 종로구 통의동 6 번지 이룸빌딩 4 층 담 당 안태산 님 M O D E L KQG-6L3B3S (S/M) 접 수 2011.11.01 1차 2차 일...

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