Daewoo KOG-3605 Service Manual
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Daewoo KOG-3605 Service Manual

Daewoo KOG-3605 Service Manual

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Service Manual
Microwave Oven
Model : : KOG-3605
DAEWOO ELECTRONICS CO., LTD.

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Summary of Contents for Daewoo KOG-3605

  • Page 1 Service Manual Microwave Oven Model : : KOG-3605 DAEWOO ELECTRONICS CO., LTD.

  • 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 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: Proper Use And Service Precautions

    CAUTION : This Device is to be Serviced Only by Porperly Qualified Service Personnel. Consult the Service Manual for Proper Service Procedures to Assure Continued Compliance with the Federal Performance Standard for Microwave Ovens and for Precautions to be Taken to Avoid Possible Exposure to Excessive Microwave Energy.

  • Page 4: Specifications

    SPECIFICATIONS Item Specification POWER SUPPLY 230V~50HZ, SINGLE PHASE WITH EARTHING MICROWAVE 1200 W MICROWAVE GRILL 1050 W COMBINATION 2200 W MICROWAVE ENERGY OUTPUT 800 W MICROWAVE FREQUENCY 2450 MHz OUTSIDE DIMENSIONS (WXHXD) 465X360X274 mm CAVITY DIMENSIONS (WXHXD) 290X290X220mm NET WEIGHT 14.5 Kg TIMER 35 min.

  • Page 5: Features Diagram

    FEATURES DIAGRAM ¤ Saftey Interlock System. ¤Ł Door Viewing Screen - Allows viewing of food, the screen is designed so that light can pass through, but not the microwave. ¤Ø Door Hook - When the door is closed, it will automatically shut. If the door is opened while the oven is operating, the magnetron will immediately stop operating.

  • Page 6: 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 7: Operation

    OPERATION 1. Connect the mains lead to an electrical socket-outlet. 2. After placing the food in a suitable utensil, open the oven door and put it on the glass turntable, Glass turntable must always be in place during cooking. In case the oven is operated in the grill mode, use the Metal Rack and place food on the metal Rack. 3.

  • Page 8: Measurement Of The Microwave Output Power

    MEASUREMENT OF THE MICROWAVE OUTPUT POWER 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 1,000±5cc of potable water.

  • Page 9: Microwave Radiation Test

    MICROWAVE RADIATION TEST WARNING • Make sure to check the microwave leakage before and after repair or adjustment. • Always, start measuring of an unknown field to assure safety for operating personnel from microwave energy. • Do not place your hands into any suspected microwave radiation field unless the safe density level is known. •...

  • Page 10: Wiring Diagram

    WIRING DIAGRAM(SLOW ACTING RELAY)
  • Page 11 WIRING DIAGRAM...

  • Page 12: Circuit Description

    CIRCUIT DESCRIPTION 1. When the food is placed in the oven cavity and door is closed. • The contact of the interlock monitor switch open (NO). • The contacts of the primary interlock switch and secondary interlock switch close. Primary Timer Interlock 15A Fuse...
  • Page 13 HIGH VOLTAGE TRANSFORMER FUSE H.V. CAPACITOR MAGNETRON H.V. DIODE Fig.2 3. When the door is opened during cooking. • Primary interlock switch and secondary interlock switch open to cut off the primary voltage to the high voltage transformer to stop microwave oscillation. •...

  • Page 14: Precautions For Disassembly And Repair

    PRECAUTIONS FOR DISASSEMBLY AND REPAIR – Cautions to be observed when trouble shooting. Unlike many other appliances, the microwave oven is a 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 15: Disassembly And Assembly

    DISASSEMBLY AND ASSEMBLY 1. To remove cabinet. Remove three screws on cabinet back. 2. To remove door assembly. 1) Remove two screws ¤ which secure the stopper hinge top. 2) Remove the stopper hinge top ¤Ł and door assembly ¤Ø from top plate of cavity. 3) Remove the stopper hinge top ¤Łfrom door assembly.
  • Page 16 (1) Remove the gasket door ¤ from door plate. (2) Remove the barrier screen inner ¤Łfrom door plate. (3) Remove the door frame ¤Øfrom door plate. (4) Remove the spring ¤ºand the hook ¤Œ . (5) Remove the barrier screen outer ¤ from door frame ¤Ø . (6) Reverse the above steps for reassembly.
  • Page 17 5. To remove control panel parts. (1) Remove the screw which secure the control panel, push up two snap fits and draw forward the control panel assembly. Remove the door open lever ¤ºfrom the control panel ¤Œ . Remove two screws ¤ıwhich secure the timer assembly ¤ . Remove the timer assembly ¤...
  • Page 18 6. To remove high voltage capacitor. (1) Remove a screw ¤ which secure the grounding ring terminal of the H.V. diode ¤Ł and the capacitor holder ¤Ø . (2) Remove the H.V. diode ¤Ł from the capacitor holder ¤Ø . (3) Reverse the above steps for reassembly.
  • Page 19 CAUTION : Never install the magnetron without the metallic gasket plate which is packed with each magnetron to prevent microwave leakage. Whenever repair work is carried out on magnetron, check the microwave leakage. It shall not exceed 4mW/cm for a fully assembled oven with door normally cosed. Magnetron antenna Metallic...
  • Page 20 10. To remove insulator Heater assembly. (1) Remove the four HEX Nuts ¤ . (2) Remove the Insulator Heater assembly ¤Ł . (3) Reverse the above steps for reassembly. 11. To remove Heater Part. TOP PLATE PART NAME PART CODE Q’TY DESCRIPTION REMARK...

  • Page 21: Interlock Mechanism

    INTERLOCK MECHANISM 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 22 (2) Secondary interlock switch and interlock monitor switch When the door is closed, the hook pushes the push lever down ward, the push lever presse the button of the monitor interlock switch to bring it under “off”, condition and presses the button of the secondary interlock switch to biring it under “on”, condition.

  • Page 23: Trouble Shooting Guide

    TROUBLE SHOOTING GUIDE Trouble Door shut, timer set but no cooking takes place. Does the fan motor work when you shut the door and turn the timer? Does 12A fuse blow? Replace continuity Check continuity of continuity primary interlock switch, interlock monitor switch secondary interlock switch with door shuted.
  • Page 24 Does the fan motor when you shut the door and turn the timer? Replace or repair Does the oven lamp light? oven lamp, Does the turntable turn? turntable motor. NO microwave oscillation. Replace Check the relay operate slow acting contact of slow relay ass'y acting relay ass'y *After short the contacts of a relay, operate oven.

  • Page 25: Component Test Procedure

    COMPONENT TEST PROCEDURE 1. High voltage is present at the high voltage terminal of the high voltage transformer during any cooking cycle. 2. It is neither necessary nor advisable to attempt measurement of the high voltage. 3. Before touching any oven components or wiring, always unplug the oven from its power source and discharge the capacitor (see page 14).

  • Page 26: Safety Interlock Continuity Test

    SAFETY INTERLOCK CONTINUITY TEST ¥ Disconnect the oven from the power supply. ¥ You can test continuity of safety interlocks and monitor switch by using switch tester or ohmmeter. ¥ The switch operation is checked by the lamp on/off of resistance zero/unlimited. ¥...

  • Page 27: Exploded And Parts List

    EXPLODED AND PARTS LIST 1. Door Assembly DOOR ASSEMBLY : 3511706000 REF NO PART CODE PART NAME DESCRIPTION Q’TY REMARK 3517003010 KOG-3605 BARRIER SCREEN *O PMMA T1.5 3512202500 KOG-3605 FRAME DOOR 3515201500 STOPPER HINGE *T AS KOR-61150S 3511705500 DOOR WELD AS...
  • Page 28 2. Control Panel Ass’y CONTROL PANEL ASSEMBLY : 3516713840 REF NO PART CODE PART NAME DESCRIPTION Q’TY REMARK 3516903610 KOG-3605 BUTTON DOOR OPEN ABS 4416D55061 SWPA KOG-3605 BUTTON SPRING 3513402610 KOG-3605 KNOB VPC 3516711400 KOG-3605 CONTRON-PANEL 3513701400 KOG-3605 LEVER DOOR OPEN...
  • Page 29 3. Main Unit...
  • Page 30 PARTS LIST REF NO. PART NAME PART CODE DESCRIPTION Q’TY REMARKS DOOR ASS’Y EXPLODED AND PART LIST C/PANEL ASS’Y COVER WAVE GUIDE 3511403500 MICA T0.5 BUTTON LOCKING 4078502031 INSULATOR HEATER AS 3513301400 KOG-36150S COUPLER 3517400600 GUIDE ROLLER AS 3512510600 KOR-61150S TRAY 3517203600 GLASS...

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