Daewoo KOR-164H0A Service Manual
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Daewoo KOR-164H0A Service Manual

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S/M No. : R164H0A002
Service Manual
Microwave Oven
Model: KOR-164H0A
KOR-164H9A27
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).
Apr. 2007

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  • Page 1 S/M No. : R164H0A002 Service Manual Microwave Oven Model: KOR-164H0A KOR-164H9A27 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 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-164H POWER SUPPLY 120V~60Hz, SINGLE PHASE WITH GROUNDING MICROWAVE 1400W POWER GRILL CONSUMPTION COMBINATION MICROWAVE ENERGY OUTPUT 1000W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W X H X D) 589 x 339 x 486 mm (23.2 x 13.3 x 19.1 in.) CAVITY DIMENSIONS (W X H X D) 399 x 263 x 426 mm (15.7 x 10.4 x 16.8 in.) NET WEIGHT...

  • 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 imme- di-atelystop operating.

  • Page 7: Control Panel

    3. CONTROL PANEL TIMER LOCK FRESH BEVERAGE POPCORN VEGETABLE FROZEN FROZEN DINNER VEGETABLE PIZZA PLATE MORE LESS MEAT POULTRY FISH POWER DEFROST KICHEN CLOCK TIMER STOP/CLEAR START /SPEEDY COOK 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.

  • 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 overheat 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 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 safety 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. KOR-164H0A/KOR-164H9A27 REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK 3512301800 GASKET DOOR 3517005200 BARRIER-SCREEN *I PE T0.1 3515204400 STOPPER HINGN *T AS KOR-162J0A 3511710500 DOOR PAINTING AS KOR-161H0A 3513101600 HOOK 3515102000 SPRING HOOK 3517005350 GLASS T3.2...
  • 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 3518520890 SWITCH MEMBRANE KOR-164H0A 3516719140 CONTROL-PANEL ABS SG-175, SG-0760D PKMPMSKN00 PCB MAIN MANUAL AS KOR-161H0A 7112401211 SCREW TAPPING T2S TRS 4*12 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.

  • 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 transformer, disconnect one lead wire from these parts and check continuity with the AC plug removed.
  • Page 19 CON DITION CHECK RESULT CAUSE REM EDY R eplace C heck con tinuity of D efective O utlet has m agn etron C ontinuity m agn etron proper voltage Fuse does not blow. O pen pow er R eplace C heck con tinuity of pow er supply cord C ontinuity supply cord...
  • Page 20 ( TROUBLE 3 ) No microwave oscillation even though fan motor rotates. CON DITION CHECK RESULT CAUSE REM EDY Replace Continuity Defective N o m icrowave C heck continuity of high high voltage oscillation voltage capacitor transform er term inals w ith w ires rem oved Replace Continuity in...
  • 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.

  • 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 wit the microwave oven supplied at rated voltage and operated at its maximum microwave power setting with a load of 1000 ±...

  • 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 Diagr

    WIRING DIAGRAM...

  • Page 26: Printed Circuit Board

    PRINTED CIRCUIT BOARD 1. CIRCUIT CHECK PROCEDURE 1. Low voltage transformer check The low voltage transform er is located on the P.C.B. M easuring condition: Input voltage: 120 V / Frequency: 60Hz Term inal Voltage LO AD N O LO A D 4 - 7 A C 24.7 V A C 29.7 V...
  • Page 28 3. W hen there is no microwave oscillation 1) W hen touching START pad, oven lam p does not turn on. Fan m otor do not rotate, but cook indicator in display com es on. Cause : RELAY 2 does not operate. refer to Circuit Diagram ( Point 3) - Check m ethod POINT...

  • Page 29: Pcb Circuit Diagram

    2. PCB CIRCUIT DIAGRAM...

  • Page 30: 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 1MF CEXE1H109A CAPACITOR ELEC 25V RSS 1000uF CEXF1E102V CONNECTOR WAFER YW396-02AV 3519150520 CONNECTOR WAFER FCZ254-11 441M367160 CONNECTOR WAFER YW396-05AV 3519150510...

  • 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 T2S TRS 4*12 MFZN 7122401211 SCREW TAPPING T2S TRS 4*12 MFZN 4413A90012 CLAMP POWER CORD NYLON 66 7112401011 SCREW TAPPING T1 TRS 4*10 MFZN 35113U6W0L 3X14AWG 120*120 120-RTML KOR-164H0A CORD POWER AS 35113UANT5 3X14AWG 60*60 120-RTML KOR-164H9A27 3518606840 NOISE-FILTER DWEF-M29 KOR-164H0A only...
  • 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. : R637R0S001 PRINTED DATE: Apr. 2007...

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Kor-164h9a27

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