Daewoo KOG-370A0S Service Manual
  1. Manuals
  2. Brands
  3. Daewoo Manuals
  4. Microwave Oven
  5. KOG-370A0S
  6. Service manual
Daewoo KOG-370A0S Service Manual

Daewoo KOG-370A0S Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Service Manual
Microwave Oven
Model: KOG-370A0S
DAEWOO ELECTRONICS CO., LTD.
S/M No. : G370A0S002
KOG-390A0S
KOG-390A0N

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the KOG-370A0S and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Daewoo KOG-370A0S

Summary of Contents for Daewoo KOG-370A0S

  • Page 1 S/M No. : G370A0S002 Service Manual Microwave Oven Model: KOG-370A0S KOG-390A0S KOG-390A0N 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 w ith the door open. (b) M ake the following safety checks on all ovens to be serviced before activating the m agnetron or other m icrowave source, and m ake repairs as necessary: (1) Interlock operation, (2) Proper door closing, (3) Seal and sealing surfaces (arcing, wear, and other dam age), (4) Dam age 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 D am age that allow s the m icrow ave energy (that cooks or heats the food) to escape w ill result in poor cooking and m ay cause serious bodily injury to the operator. IF A N Y O F TH E FOLLO W IN G CO N D ITIO N S E X IS T, O P E RATO R M U S T N O T US E TH E A P P LIA N C E .

  • Page 4: Specifications

    SPECIFICATIONS KOG-370A0S / KOG-390A0S M O D EL KO G -370A 0S KO G -390A 0S PO W E R SU P PLY 230V,50H z, S IN G LE P H A SE W IT H EA RT H IN G...

  • Page 5: External View

    EXTERNAL VIEW 1. OUTER DIMENSION 465/495 360/388...

  • Page 6: Feature Diagram

    EXTERNAL VIEW 2. FEATURE DIAGRAM 1. DOOR SEAL - Door seal m aintains the m icrowave energy within the oven cavity and prevents m icrowave leakage. 2. REFLECTOR (Insulator Heater) 3. HEATING ELEMENT 4. OVEN CAVITY 5. SEFETY INTERLOCK SYSTEM 6.

  • Page 7: Control Panel

    EXTERNAL VIEW 3. CONTROL PANEL COMBI TIMER/g DEF. GRILL 1. Bread 2. Soup Auto 3. Baked Potato Cook 4. Fresh Vegetable 5. Frozen Vegetable O n e T o uc h C o o k A u to D e fro st D ish Warm er M ea t Frozen Pizza...

  • Page 8: Installation

    INSTALLATION 1. Steady, flat location This m icrow ave oven should be set on a steady, flat surface. This m icrow ave oven is designed for counter top use only. 2. Leave space behind and side A ll air vents should be kept a clearance. If all vents are covered during operation, the oven m ay overheat and, eventually, cause failure.

  • Page 9: Operations And Functions

    OPERATIONS AND FUNCTIONS 1. Connect the m ain 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 m ust 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. You are asked to observe the following precautions carefully.
  • Page 11 DISASSEMBLY AND ASSEMBLY 1. To remove cabinet 1) Rem ove three screws on cabinet back. 2) Push the cabinet backward. 2. To remove door assembly 1) Rem ove a screw which secure the stopper hinge top. 2) Rem ove the door assem bly from top plate of cavity. 3) Reverse the above for reassem bly.
  • Page 12 DISASSEMBLY AND ASSEMBLY 3. To remove door parts. DOO R ASSEM BLY KO G -370A : 3511710320 KO G -390A : 3511710720 (1) KOG-370A REF. NO PA RT CODE PART N AME DESCRIPTION Q TY REMARK A 01 3512203810 FR A M E D O O R A BS X R -401 H -2938 A 02 3517003050...
  • Page 13 DISASSEM BLY AND ASSEM BLY 1) Rem ove the gasket door from door weld as. 2) Rem ove the barrier screen inner from door weld as. 3) Rem ove the door fram e from door weld as. 4) Rem ove the stopper hinge top from door weld as. 5) Rem ove the spring and the hook.
  • Page 14 DISASSEMBLY AND ASSEMBLY 5. To remove control panel parts. CONTROL-PANEL ASSEM BLY K O G -370A : P K C P S W B V 00 K O G -390A : P K C P S W B W 00 (1) KOG-370A REF.NO PART CODE...
  • Page 15 DISASSEMBLY AND ASSEMBLY 1) Remove the screw which secure the control panel, push up two snap fits and draw forward the control panel assem bly. 2) Rem ove the door open lever from the control panel. 3) Rem ove four screws which secure the PCB assem bly to control panel. 4) Disconnect m em brane tail from the connector of the PCB assem bly.
  • Page 16 DISASSEMBLY AND ASSEMBLY 8. To remove wind guide assembly. 1) Rem ove a screw for earthing. 2) Rem ove the noise filter from the wind guide. 3) Rem ove a screw which secure the wind guide assem bly. 4) Draw forward the wind guide assem bly. 5) Pull the fan from the m otor shaft.
  • Page 17 DISASSEMBLY AND ASSEMBLY 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 DISASSEMBLY AND ASSEMBLY 12. To remove heater parts. REF.NO PART CO DE PAR T NAME DESCR IPTIO N REMARK C 01 7392500008 N UT H E X 6N -2-5 S U S C 02 3515000600 S PA CE R IN SU LATO R *I C3771BD C 03 3513301100...

  • Page 19: Interlock Mechanism And Adjustment

    INTERLOCK MECHANISM AND ADJUSTMENT The door lock m echanism is a device which has been specially designed to com pletely elim inate m icrowave radiation when the door is opened during operation, and thus to perfectly prevent the danger resulting from the leakage of microwave. (1) Prim ary interlock switch W hen the door is closed, the hook locks the oven door.

  • Page 20: Trouble Shooting Guide

    TROUBLE SHOOTING GUIDE Following the procedure below to check if the oven is defective or not. 1) Check earthing before trouble checking. 2) Be careful of the high voltage circuit. 3) Discharge the high voltage capacitor. 4) W hen checking the continuity of the switches, fuse or high voltage transform er, disconnect one lead wire from these parts and check continuity with the AC plug removed.
  • Page 21 TROUBLE SHOOTING GUIDE 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. C heck con tinuity of R eplace D efective line noise filter board...
  • Page 22 TROUBLE SHOOTING GUIDE ( TROUBLE 3 ) N o m icrowave oscillation even though fan m otor rotates. C ON DITIO N C HE C K R ES U LT C AU S E R EM ED Y N o C ontinuity N o m icrow ave C heck continuity of high oscillation...
  • Page 23 TROUBLE SHOOTING GUIDE ( TROUBLE 4 ) The following visual conditions indicate a probable defective touch control circuit or membrane switch assembly 1. Incom plete segm ents, 1) Segm ents m issing. 2) Partical segm ents m issing. 3) Digit flickering other than norm al display slight flickering.

  • Page 24: Measurement And Test

    MEASUREMENT AND TEST 1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT M icrowave output power can be checked by indirectly m easuring the tem perature rise of a certain am ount of water exposed to the m icrowave as directed below. PROCEDURE 1.

  • Page 25: Microwave Radiation Test

    MEASUREMENT AND TEST 2. MICROWAVE RADIATION TEST CAUTION 1. M ake sure to check the m icrowave leakage before and after repair of adjustm ent. 2. Always start m easuring of an unknown field to assure safety for operating personnel from m icrowave energy. 3.

  • Page 26: Component Test Procedure

    MEASUREMENT AND TEST 3. COMPONENT TEST PROCEDURE High voltage is present at the high voltage term inal of the high voltage transform er during any cooking cycle. It is neither necessary nor advisable to attem pt m easurem ent 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 transform er is located on the P.C.B. M easuring condition: Input voltage: 220~230 V / Frequency: 50Hz Term inal Voltage LO AD N O LO A D 4 - 7 A C 12.6 V A C 14.7 V...
  • Page 29 PRINTED CIRCUIT BOARD M P1 M P2 Measure Point...
  • Page 30 PRINTED CIRCUIT BOARD 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 P OINT STATE...

  • Page 31: Pcb Circuit Diagram

    PRINTED CIRCUIT BOARD 2. P.C.B. CIRCUIT DIAGRAM...

  • Page 32: Location No

    PRINTED CIRCUIT BOARD 3. P.C.B. LOCATION NO (1) KOG-370A0S NAM E SYM BOL SP ECIFIC ATION PART CODE Q 'TY B UZ Z E R B Z1 B M -20K 3515600100 C AR R AY CA 1 7P(6) 102 M 50V...
  • Page 33 PRINTED CIRCUIT BOARD (2) KOG-390A0S / KOG-390A0N NAM E SYM BOL SP ECIFIC ATION PART CODE Q 'TY B UZ Z E R B Z1 B M -20K 3515600100 C AR R AY CA 1 7P(6) 102 M 50V CN 6X B-102M C APAC ITO R ELE C E C1 16V R S S 100uF...

  • Page 34: Exploded View And Parts List

    EXPLODED VIEW AND PARTS LIST 1. DOOR ASSEMBLY Refer to Disassem bly and assem bly. 2. CONTROL PANEL ASSEMBLY Refer to Disassem bly and assem bly. 3. TOTAL ASSEMBLY...
  • Page 35 EXPLODED VIEW AND PARTS LIST (1) KOG-370A0S REF NO PART CO DE PART NAM E DESCR IPTIO N Q'TY A 00 D O O R A S R efer to disassem bly and assem bly B 00 C O NT R O L PAN E L AS...
  • Page 36 EXPLODED VIEW AND PARTS LIST REF NO PART CO DE PART NAM E DESCR IPTIO N Q'TY F 32 7112401011 S C RE W TA P PIN G T 1 T R S 4*10 M FZ N F 33 3512100900 F O O T P P D A S F-130 F 34...
  • Page 37 EXPLODED VIEW AND PARTS LIST (2) KOG-390A0S / KOG-390A0N REF NO PART CO DE PART NAM E DESCR IPTIO N Q'TY A 00 D O O R A S R efer to disassem bly and assem bly B 00 C O NT R O L PAN E L AS R efer to disassem bly and assem bly 3513302700 K O G -37150S...
  • Page 38 EXPLODED VIEW AND PARTS LIST REF NO PART CO DE PART NAM E DESCR IPTIO N Q'TY F 30 3516003700 S P E CIA L SC R E W T T3 H E X 4X 8 F LG M F ZN F 31 3510311900 B A S E...
  • Page 39 DAEWOO ELECTRONICS CO., LTD 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX : DWELEC K28177-8 CABLE : “DAEWOOELEC” E-mail : G7F00E@web.dwe.co.kr FAX : 02) 360-8184 TEL: 02) 360-8179~8180 PRINTED DATE : JUN. 1999...

This manual is also suitable for:

Kog-390a0sKog-390a0n

Table of Contents