Daewoo KOC-8HAT7S Service Manual
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Daewoo KOC-8HAT7S Service Manual

Daewoo KOC-8HAT7S Service Manual

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S/M No. :
Service Manual

Microwave Oven

Model: KOC-8HAT7S
KOC-8HAT7R
KOC-8HAF7R
KOC-8HBF7S(7S24)
KOC-8HBF7P24
✔
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).
OC8HABTF01
Jul. 2013

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Summary of Contents for Daewoo KOC-8HAT7S

  • Page 1: Microwave Oven

    OC8HABTF01 S/M No. : Service Manual Microwave Oven Model: KOC-8HAT7S KOC-8HAT7R KOC-8HAF7R KOC-8HBF7S(7S24) KOC-8HBF7P24 ✔ 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 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: Safety And Precautions

    1. 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

    KOC-8HAT7S / 8HAT7R / 8HAF7R POWER SUPPLY 230V~50Hz, SINGLE PHASE WITH EARTHING MICROWAVE 1400W POWER GRILL 850W CONSUMPTION CONVECTION 1850W (KOC-8HAT7S / 8HAT7R) COMBINATION KOC-8HAT7S : 2500W, KOC-8HAT7R : 1850W MICROWAVE 1400W POWER GRILL 2300W CONSUMPTION CONVECTION 1850W (KOC-8HAF7R) COMBINATION 1850W FRYER...

  • Page 5: External View

    3. EXTERNAL VIEW 1. OUTER DIMENSION (KOC-8HAT7S/8HAT7R/ 8HAF7R)) 2. OUTER DIMENSION (KOC-8HBF7S(7S24) / 8HBF7P24)

  • Page 6: Feature Diagram

    2. FEATURE DIAGRAM 19. Metal Tray 11. DOOR HOOK Put food or appropriate cookware directly on the When the door is closed, it will automatically lock metal tray and place on the glass turntable and then shut. If door is opened while oven is operating, the place on the roller guide when using convection magnetron will immediately stop operating.

  • Page 7: Installation

    • This appliance is supplied with cable of special type, which, if damaged, must be repaired with cable of same type. Such a cable can be purchased from DAEWOO and must be installed by a Qualified Person. 6. Examine the oven after unpacking for any damage such as: A misaligned door, broken door or a dent in cavity.

  • Page 8: Control Panel

    5-1. CONTROL PANEL ( KOC-8HAT7S / KOC-8HAT7R ) 1 Display : Cooking time, power level, indicators and present time are displayed. M/W : When blinking, the oven is operating in MICROWAVE COOK. Grill : When blinking, the oven is operating in GRILL.
  • Page 9 5-2. CONTROL PANEL ( KOC-8HBF7S(7S24) / KOC-8HBF7P24 / KOC-8HAF7R) 1 Display : Cooking time, power level and indicators are displayed. M/W : When blinking, the oven is operating in MICROWAVE COOK. Grill : When blinking, the oven is operating in GRILL. Combi : When blinking, the oven is operating in COMBI.

  • Page 10: Disassembly And Assembly

    6. 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 four screws on the 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 3-1. To remove door parts. (KOC-8HAT7S / KOC-8HAT7R / KOC-8HAF7R) REF. NO PART CODE PART NAME DESCRIPTION Q'TY REMARK 3511726630 DOOR AS KOC-8HATKS 3517004400 BARRIER SCREEN *I TEMP GLASS T2.0 3511708900 DOOR PAINTING AS KOC-871C0S 3513101310 HOOK 3515101310 SPRING HOOK...
  • Page 13 3-2. To remove door parts. (KOC-8HBF7S(7S24) / 8HBF7P24) REF. NO PART CODE PART NAME DESCRIPTION Q'TY REMARK 3511726640 DOOR AS KOC-8HBTKC 3511622600 DECORATOR HANDLE ABS SG-175 SG-0760D 3517009570 BARRIER-SCREEN * O SEAL AS KOC-8HBTKC SILICON 3515309300 SUPPORTER BRACKET GLASS T0.8 7S312X40A1 SCREW SPECIAL T1 TRS 4X10 SE MFZN...
  • Page 14 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 15 5-1. To remove control panel parts. (KOC-8HAT7S / KOC-8HAT7R / KOC-8HAF7R) REF. NO PART CODE PART NAME DESCRIPTION Q'TY REMARK PKCPSWGJ70 CONTROL-PANEL AS KOC-8HAT7S PKCPSWGJ90 KOC-8HAT7R PKCPSWZZZZ KOC-8HAF7R 3516922610 BUTTON POWER ABS SG-0760D, SG175 COATING 5S732G30X0 SW MICRO MS2-T0T200 250/125V 5A T85...
  • Page 16 5-2. To remove control panel parts. (KOC-8HBF7S(7S24) / 8HBF7P24) REF. NO PART CODE PART NAME DESCRIPTION Q'TY REMARK PKCPSWGM80 CONTROL-PANEL AS KOC-8HBF7S 3516751800 DECORATOR CAP ABS SG-0760D, SG-175 3513413000 KNOB DIAL ABS TR558A 3511625330 DECORATOR KNOB ABS SG-0760D, SG-175 COATING 3516922610 BUTTON POWER ABS SG-175 SG-0760D COATING...
  • Page 17 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 18 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.
  • Page 19 10-1 . To remove Top heater assembly parts. (KOC-8HAT7S / KOC-8HAT7R) REF. NO PART CODE PART NAME DESCRIPTION Q'TY REMARK 3512805800 HEATER MIRACLON 230V 800W 270MM 3512806900 HEATER REFLECTOR STS430 T0.5 7122408114 SCREW TAPPING T2S TRS 4X6 MFNI 3511414600 COVER HEATER *T STS 430 2B 0.4T...
  • Page 20 10-2. To remove Top heater assembly parts. (KOC-8HBF7S(7S24) / 8HBF7P24 / 8HAF7R) REF. NO PART CODE PART NAME DESCRIPTION Q'TY REMARK 3512807430 HEATER *T AS KOC-8H6TKS 3511414700 COVER HEATER *T STS 430 2B 0.4T 3512803230 220V 800W A 270MM KOC-8HBF7P24 HEATER MIRACLON 3512805800 230V 800W 270MM...
  • Page 21 11. To remove Rear heater assembly parts.
  • Page 22 REF. NO PART CODE PART NAME DESCRIPTION Q'TY REMARK 3512807520 KOC-8HBTKC KOC-8HBF7P24 3512807500 HEATER *B AS KOC-8H5T7S KOC-8HAT7S / 8HAT7R 3512809600 KOC-8HBF7S KOC-8HAF7R 3512782610 HARNESS CONVECTION *B KOC-8H5T7S 3511412500 COVER HEATER *B SA1D-80 T0.5 7601400811 SCREW MACHINE PAN 4X8 PW MFZN...

  • Page 23: Interlock Mechanism And Adjustment

    7. 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. SWITCH MOUNTING BRACKET PRIMARY...

  • Page 24: Troubleshooting Guide

    8. 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 tranformer, disconnect one load wire from these parts and check continuity with the AC plug removed.
  • Page 25 CONDITION CHECK RESULT CAUSE REMEDY Defective Outlet has Check continuity of Replace continuity magnetron. proper magnetron voltage fuse does not blow? Defective line Check continuity of noise filter Replace continuity board filter board Open power Check continuity of Replace continuity supply cord power supply cord Defective touch...
  • Page 26 TROUBLE 3) No microwave oscillation even though fan motor rotates. CONDITION CHECK RESULT CAUSE REMEDY Check continuity of Replace Defective continuity microwave high voltage fuse high voltage oscillation fuse No microwave oscillation Continuity Check continuity of Defective high voltage capacitor terminals high voltage with wires removed transformer...
  • Page 27 (TROUBLE 4) Grill heater (upper heater) is not heated; food will not become hot. CONDITION CHECK RESULT CAUSE REMEDY Malfunction of Adjust or Check continuity of Grill heater is primary Interlock replace continuity primary interlock switch not heated. switch Adjust or Malfunction of Check continuity of replace...
  • Page 28 (TROUBLE 6) The following visual conditions indicate a probable defective touch control Circuit or button P.C.B. assembly 1. Incomplete segments. 1) segment missing 2) partial segments missing 3) digit flickering other than normal fluorescent slight flickering 2. A distinct change in the brightness of one or more numbers exists in the display 3.

  • Page 29: Measurement And Test

    9. 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 30: Microwave Radiation Test

    2. MICROWAVE RADIATION TEST WARNING 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 31: 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 32: Wiring Diagram

    10-1. WIRING DIAGRAM...
  • Page 33 10-2. WIRING DIAGRAM...

  • Page 34: Exploded View And Parts List

    11. EXPLODED VIEW AND PARTS LIST 1. DOOR ASSEMBLY Refer to 6. Disassembly and assembly. 2. CONTROL PANEL ASSEMBLY Refer to 6. Disassembly and assembly. 3. TOTAL ASSEMBLY...
  • Page 35 - KOC-8HAT7S REF. NO PART CODE PART NAME DESCRIPTION Q'TY 3516118500 CAVITY AS KOC-8H5T7S 3511403800 COVER WAVE GUIDE MICA T0.35 7112400816 SCREW TAPPING T1 TRS 4X8 MFZNNI 3517400610 COUPLER TEFLON 3966031700 MOTOR SYNCRO 220/240V 50/60HZ SM16 HK36M6F6 7121400611 SCREW TAPPING...
  • Page 36 REF. NO PART CODE PART NAME DESCRIPTION Q'TY 3512807400 HEATER *T AS KOC-8H5T7S 7S312X40A1 SCREW SPECIAL T1 TRS 4X10 SE MFZN 3518907400 THERMOSTAT OFF:160 ON:0 V 187 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 3512523600 GUIDE AIR OUTLET SBHG T0.5 7S312X40A1 SCREW SPECIAL T1 TRS 4X10 SE MFZN...

  • Page 37: Koc-8Hatks

    - KOC-8HAT7R REF. NO PART CODE PART NAME DESCRIPTION Q'TY 3516118500 CAVITY AS KOC-8H5T7S 3511403800 COVER WAVE GUIDE MICA T0.35 7112400816 SCREW TAPPING T1 TRS 4X8 MFZNNI 3517400610 COUPLER TEFLON 3966031700 MOTOR SYNCRO 220/240V 50/60HZ SM16 HK36M6F6 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 3514801400 SENSOR TEMPERATURE...

  • Page 38: Koc-871C0S

    REF. NO PART CODE PART NAME DESCRIPTION Q'TY 3512807400 HEATER *T AS KOC-8H5T7S 7S312X40A1 SCREW SPECIAL T1 TRS 4X10 SE MFZN 3518907400 THERMOSTAT OFF:160 ON:0 V 187 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 3512523600 GUIDE AIR OUTLET SBHG T0.5 7S312X40A1 SCREW SPECIAL T1 TRS 4X10 SE MFZN...
  • Page 39 11. EXPLODED VIEW AND PARTS LIST 1. DOOR ASSEMBLY Refer to 6. Disassembly and assembly. 2. CONTROL PANEL ASSEMBLY Refer to 6. Disassembly and assembly. 3. TOTAL ASSEMBLY...
  • Page 40 - KOC-8HBF7S(7S24) / 8HBF7P24 / 8HAF7R REF. NO PART CODE PART NAME DESCRIPTION Q'TY 3516118550 CAVITY AS KOC-8HBTKC 7S312X40A1 SCREW SPECIAL T1 TRS 4X10 SE MFZN 3512523600 GUIDE AIR OUTLET SBHG T0.5 3512807430 KOC-8H6TKS (KOC-8HBF7P24) HEATER *T AS 3512809400 KOC-8HBF7S (KOC-8HAF7R) 7S312X40A1 SCREW SPECIAL T1 TRS 4X10 SE MFZN...

  • Page 41: Koc-8Hbtkc

    REF. NO PART CODE PART NAME DESCRIPTION Q'TY 3516003700 SPECIAL SCREW TT3 HEX 4X8 FLG MFZN 3510311000 BASE SBHG-1 T0.7 3517304300 FOAM CR 15TX150X15 3512101400 FOOT DASF-310 7S312X40A1 SCREW SPECIAL T1 TRS 4X10 SE MFZN 7S342X4081 SCREW SPECIAL T2S TRS 4X8 SE MFZN 3515202800 STOPPER HINGE *U AS KOR-121M0A...
  • Page 42 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: Jul. 2013...

This manual is also suitable for:

Koc-8hbf7sKoc-8hbf7p24Koc-8hat7rKoc-8hbf7s24Koc-8haf7r

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