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Daewoo KOC-9Q3T7S, Service Manual, Page: 4 / 47

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Daewoo KOC-9Q3T7S Service Manual Download Page 4

3

MODEL

KOC-9Q3T7S

POWER SUPPLY

230V~50Hz, SINGLE PHASE WITH EARTHING

MICROWAVE

1400W

POWER

GRILL

1250W

CONSUMPTION

CONVECTION

1250W

COMBINATION

2700W

MICROWAVE ENERGY OUTPUT

900W (IEC 705)

MICROWAVE FREQUENCY

2450MHz

OUTSIDE DIMENSIONS  (W X D X H)

513X382X311mm(20.2X15X12.2 in.)

CAVITY DIMENSIONS  (W X D X H)

354X341X231mm(13.9X13.4X9.1 in.)

NET WEIGHT 

Approx. 16.6Kg (46.6 lbs.)

TIMER

60 minutes

FUNCTION SELECTIONS

Microwave / Grill / Convection / Combination

POWER SELECTIONS

10 LEVELS

CAVITY VOLUME 

0.99 Cu. Ft

* SPECIFICATION ARE SUBJECT TO CHANGE WITHOUT NOTICE.

MODEL

KOC-9Q4T7S / 9Q4T7WA9

POWER SUPPLY

230V~50Hz, SINGLE PHASE WITH EARTHING

MICROWAVE

1400W

POWER

GRILL

1250W

CONSUMPTION

CONVECTION

1250W

COMBINATION

2700W

MICROWAVE ENERGY OUTPUT

900W (IEC 705)

MICROWAVE FREQUENCY

2450MHz

OUTSIDE DIMENSIONS  (W X D X H)

513X383X311mm(20.2X15.1X12.2 in.)

CAVITY DIMENSIONS  (W X D X H)

354X341X231mm(13.9X13.4X9.1 in.)

NET WEIGHT 

Approx. 16.6Kg (46.6 lbs.)

TIMER

60 minutes

FUNCTION SELECTIONS

Microwave / Grill / Convection / Combination

POWER SELECTIONS

10 LEVELS

CAVITY VOLUME 

0.99 Cu. Ft

* SPECIFICATION ARE SUBJECT TO CHANGE WITHOUT NOTICE.

2. SPECIFICATIONS

Summary of Contents for KOC-9Q3T7S

Page 1: ...4T7WA9 S M No Mar 2010 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: ...ty for proper alignment integrity and connections d Any defective or misadjusted components in the interlock monitor door seal and microwave generation and transmission systems shall be repaired replaced or adjusted by procedures described in this manual before the oven is released to the owner TABLE OF CONTENTS 1 SAFETY AND PRECAUTIONS 2 2 SPECIFICATIONS 3 3 EXTERNAL VIEW 4 3 1 OUTER DIMENSION 4 ...

Page 3: ...ny certified oven unit is found to servicing a microwave emission check should be performed prior to servicing the oven a inform the manufacturer importer or assembler b repair the unit at no cost to the owner c attempt to ascertain the cause of the excessive leakage d tell the owner of the unit not to use the unit until the oven has been brought into compliance 3 If the oven operates with the doo...

Page 4: ...S 10 LEVELS CAVITY VOLUME 0 99 Cu Ft SPECIFICATION ARE SUBJECT TO CHANGE WITHOUT NOTICE MODEL KOC 9Q4T7S 9Q4T7WA9 POWER SUPPLY 230V 50Hz SINGLE PHASE WITH EARTHING MICROWAVE 1400W POWER GRILL 1250W CONSUMPTION CONVECTION 1250W COMBINATION 2700W MICROWAVE ENERGY OUTPUT 900W IEC 705 MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS W X D X H 513X383X311mm 20 2X15 1X12 2 in CAVITY DIMENSIONS W X D X H 3...

Page 5: ...4 3 EXTERNAL VIEW 382 513 311 1 OUTER DIMENSION 1 KOC 9Q3T7S 383 513 311 2 KOC 9Q4T7S 9Q4T7WA9 ...

Page 6: ... through the screen 14 TOP HEATER Top heater turns on if any of heater related mode operates 15 OVEN FRONT PLATE 16 CONVECTION INLET 17 OVEN LAMP Oven lamp turns on anytime the door opens and oven operates 18 SAFETY INTERLOCK SYSTEM 19 CONTROL PANEL 10 METAL RACK 11 COUPLER Coupler located at the center of the oven cavity and it couples between the motor and the glass tray 12 ROLLER GUIDE Roller g...

Page 7: ...ce 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 If any of the above are visible DO NOT INSTALL and notify dealer immediately 7 Do not operate the oven if ...

Page 8: ...en is operating in STEAM CLEANING mode gram When blinking the oven is operating in weight input mode 2 2 Auto cook Used to cook or reheat 3 3 Defrost Used to defrost foods 4 4 MW Used to set power level of the microwave 5 5 Grill Used to select grill mode 6 6 Combi Used to select combi mode 7 7 Convection Used to select convection mode and selected temp 8 8 Clock Used to set clock 9 9 STEAM CLEANI...

Page 9: ...M CLEANING mode gram When blinking the oven is operating in weight input mode 2 2 Auto cook Used to cook or reheat 3 3 Defrost Used to defrost foods 4 4 MW Used to set power level of the microwave 5 5 Grill Used to select grill mode 6 6 Combi Used to select combi mode 7 7 Convection Used to select convection mode and selected temp 8 8 Clock Used to set clock 9 9 STEAM CLEANING Used to clean the in...

Page 10: ...inning repair work 2 Warning about the electric charge in the high voltage capacitor For about 30 seconds after the operation stopped and electric charge remains in the high voltage capacitor When replacing or checking parts short between oven chassis and the negative high terminal of the high voltage capacitor by using a properly insulated screwdriver to discharge 4 When the fuse is blown out due...

Page 11: ...ward 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 assembly NOTE After replacing the door assembly perform a check of correct alignment with the hinge and cavity front plate ...

Page 12: ...n 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 B01 3512607710 HANDLE DOOR ABS SG 0760D SG 175 SPRAY 1 B02 3512209640 FRAME DOOR ABS XR 401 1 B03 3515204120 STOPPER HINGE T AS KOR 6L0B1A 1 B04 3516603100 DOOR PLATE SECC 0 5T 1 B05 712240121...

Page 13: ... TY A01 A03 A02 A04 A07 A08 A06 A05 2 KOC 9Q4T7S 9Q4T7WA9 1 Remove the GASKET DOOR from DOOR AS 2 Remove screws from DOOR AS 3 Remove the HANDLE DOOR from DOOR AS 4 Remove the DOOR PALTE from FRAME DOOR 5 Remove the STOPPER HINGE T AS from DOOR PLATE 6 Remove the SPRING HOOK and the HOOK 7 Reverse the above steps for reassembly Caution In this Manual some parts can be changed for improving their p...

Page 14: ...ge top and then push the door to contact the door seal to oven front surface Tighten two screws 2 To reduce gap located on part B Loosen two screws on stopper hinge under and then push the door to contact the door seal to oven front surface Tighten two screws A B NOTE A small gap may be acceptable if the microwave leakage does not exceed 4mW cm2 ...

Page 15: ...nce 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 B01 3513412110 KNOB DIAL ABS SG 0760D SG 175 1 B02 3516737190 CONROL PANEL ABS SG 0760D SG 175 1 B03 3516912730 BUTTON FUNCTION A ABS SG 0760D SG 175 1 B04 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 4 B05 3514332650 PCB MAIN AS KOC 9...

Page 16: ...ove screws securing the PCB MAIN AS 3 Pull out the PCB MAIN AS 4 Pull out the BUTTON FUNCTION A and B 5 Reverse the above steps for reassembly B01 3513412110 KNOB DIAL ABS SG 0760D SG 175 1 B02 3516737190 CONROL PANEL ABS SG 0760D SG 175 1 B03 3516912730 BUTTON FUNCTION A ABS SG 0760D SG 175 1 B04 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 4 BO5 3514332650 PCB MAIN AS KOC 9Q4T7S 1 3514334700 KOC 9...

Page 17: ... gasket plate Magnetron antenna Cooling fin Filament terminal MAGNETRON Wave guide Magnetron antenna Metallic gasket plate 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 To remove magnetron 1 ...

Page 18: ... remove wind guide assembly 1 Remove a screw for earth 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 7 Remove the motor shaded pole 8 Reverse the above steps for reassembly ...

Page 19: ... Remove NUT HEX at the center of the fan 3 Remove WASHER PLAIN 4 Remove two screws from the COVER FAN CONVECTION 5 Pull out the MOTOR SHADED POLE 6 Reverse the above steps for assembly H08 3511801400 FAN CONVECTION AS KOC 9Q0T7S 1 C01 3511414400 COVER FAN CONVECTION SBHG 2 T0 6 1 C02 3963511420 MOTOR SHADED POLE 230V 50HZ MW10CA T04 1 C03 7S432X4081 SPECIAL SCREW TT3 TRS 4X8 SE MFZN 2 C04 35118012...

Page 20: ...CKET COVER HEATER from the COVER HEATER T 3 Remove the HEATER MIRACLON 4 Remove two screws from the HEATER REFLECTOR 5 Remove the HEATER REFLECTOR from the COVER HEATER T 6 Reverse the above steps for reassembly H44 3512807530 HEATER T AS KOC 9Q0T7S 1 D01 3512805800 HEATER MIRACLON 230V 800W 270MM 1 D02 3511414500 COVER HEATER T SA1D T0 5 1 D03 3512808200 HEATER REFLECTOR STS430 T0 4 1 D04 7123400...

Page 21: ... co kr 12 To remove guide air assembly parts 1 Remove a screw from the GUIDE AIR 2 Remove the HOLDER HEATER from the GUIDE AIR 3 Remove the HEATER U 4 Reverse the above steps for reassembly H45 3512525510 GUIDE AIR AS KOC 9Q0T7S 1 E01 3512528410 GUIDE AIR SAID T0 5 1 E02 3512806700 HEATER U 230V 400W TC 1 E03 3513004400 HOLDER HEATER STS 301 T0 5 1 E04 7123400808 SCREW TAPPING T2S BIN 4X8 STS 1 RE...

Page 22: ... the lock lever downward The hook presses the button of the interlock monitor switch to bring it under OFF condition NO position and the lock lever presses the button of the DOM switch to bring it under ON condition NO position 3 Adjustment steps a Loosen the one mounting screw b Adjust interlock switch assembly position c Make sure that lock lever moves smoothly after adjustment is completed d Ti...

Page 23: ...f the terminals and power cord before check the parts listed below CONDITION CHECK Check continuity of interlock monitor switch with door closed COM NC Check continuity of both primary and secondary interlock switch with door closed Malfunction of Interlock monitor switch Malfunction of interlock switch RESULT Continuity No continuity CAUSE REMEDY Replace COM NC Fuse blows Replace Shorted contacts...

Page 24: ...djust for adjustment instructions TROUBLE 2 Display shows all figures selected but oven does not start cooking even though desired program and time are set and start button is tapped CONDITION CHECK Check continuity of primary interlock switch Malfunction of primary interlock switch RESULT No continuity CAUSE REMEDY Adjust or replace Turn table motor and oven lamp do not turn on Check D C voltage ...

Page 25: ...ads to magnetron terminal and magnetron body Continuity Defective magnetron 2 1 Check resistance of primary and secondary coil of high voltage transformer 0 or Defective high voltage transformer Replace Check continuity of high voltage fuse No microwave oscillation No continuity 2 Check continuity of magnetron heater with wires removed No continuity Defective magnetron Replace 1 Check continuity o...

Page 26: ...heck continuity of heater Defective heater No continuity Replace TROUBLE 5 1 Convection heater is not heated food will not become hot 2 Convection fan motor does no rotate CONDITION CHECK Check continuity of primary interlock switch Malfunction of primary Interlock switch RESULT No continuity Adjust or replace 1 Sub heater is not heated 2 Convection fan and motor does not rotate Check D C voltage ...

Page 27: ...y should be 4 Display does not count down or up with time cooking or clock operation 5 Oven is programmable and cooks normally but no display shows 6 Display obviously jumps in time while counting down 7 Display counts down noticeably too fast while cooking 8 Display does not show the time of day when clear button is touched 9 Oven lamp and turn table motor do not stop although cooking is finished...

Page 28: ...for the water temperature to attain 20 C 2 C is measured The oven is then switched off and the final water temperature is measured within 60s NOTE 1 The water stirred is before its temperature is measured NOTE 2 Stirring and measuring devices are to have a low heat capacity 4 The microwave power output is calculated from the formula where P is the microwave power output in watts mw is the mass of ...

Page 29: ...abinet door seem door viewing screen the exhaust air vents and the suction air vents 3 Measuring should be in a counter clockwise direction at a rate of 1 in sec If the leakage of the cabinet door seem is unknown move the probe more slowly 4 When measuring near a corner of the door keep the probe perpendicular to the areas making sure the probe end at the base of the cone does not get closer than ...

Page 30: ...hmmeter set on the highest resistance scale measure the resistance across the diode terminals Reverse the meter leads and again observe the resistance reading Meter with 6V 9V or higher voltage batteries should be used to check the front back resistance of the diode otherwise an infinite resistance may be read in both directions A normal diode s resistance will be infinite in one direction and sev...

Page 31: ...NT ACTION M W GRILL COMBI CONVECTION ROAST PORK ROAST BEEF ROAST CHICKEN BAKED FISH FRESH VEGETABLES DEFROST STEAM CLEANING WARM MANUAL MODE COOKING MODE AUTO MODE MAGNE TRON MAIN HEATER SUB HEATER CONVEC TION FAN ...

Page 32: ...31 10 WIRING DIAGRAM ...

Page 33: ...SSEMBLY Refer to 6 Disassembly and assembly 3 TOTAL ASSEMBLY 1 KOC 9Q3T7S H35 H37 H05 H02 H56 H57 H55 H07 H13 H15 H16 H14 H16 H27 H21 H20 H24 H33 H26 H22 H23 H08 H39 H43 H31 H46 H49 H50 H45 H53 H41 H03 H38 H09 H52 H51 H48 H01 H32 H54 H42 H40 H44 H10 H11 H25 H34 H28 H30 H12 H06 H17 H18 H04 H19 H36 H47 H29 ...

Page 34: ... 200G 1 H16 4415A66910 SW MICRO VP 531A OF SZM V16 FA 61 2 H17 3518907020 THERMOSTAT OFF 120 ON 60 H 187 NB 1 H18 3513003410 HOLDER THERMOSTAT PP BK 1 H19 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 2 H20 3510317520 BASE SBHG T0 5 1 H21 3512101400 FOOT DASF 310 2 H22 3518303100 CAPACITOR HV 2100VAC 0 98UF 187 3 0 1 H23 3513003200 HOLDER HV CAPACITOR SECC T0 5 1 H24 3518400400 DIODE HV HVR 1X 3AB 12...

Page 35: ...16003700 SPECIAL SCREW TT3 HEX 4X8 FLG MFZN 3 H45 3512807530 HEATER T AS KOC 9Q0T7S 1 H46 3512525510 GUIDE AIR AS KOC 9Q0T7S 1 H47 7112401011 SCREW TAPPING T1 TRS 4 10 MFZN 2 H48 7113400810 SCREW TAPPING T1 BIN 4X8 STS430 MFZN 1 H49 3513304400 INSULATOR HEATER T SBHG T0 4 1 H50 3518903800 THERMOSTAT OFF 160 ON 115 V 187 1 H51 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 1 H52 7S312X40A1 SCREW SPECIAL...

Page 36: ...isassembly and assembly 3 TOTAL ASSEMBLY 2 KOC 9Q4T7S 9Q4T7WA9 H35 H37 H05 H02 H56 H57 H55 H07 H13 H15 H16 H14 H16 H27 H21 H20 H24 H33 H26 H22 H23 H08 H39 H43 H31 H46 H49 H50 H45 H53 H41 H03 H38 H09 H52 H51 H48 H01 H32 H54 H42 H40 H44 H10 H11 H25 H34 H28 H30 H12 H06 H17 H18 H04 H19 H36 H47 H29 ...

Page 37: ...415A66910 SW MICRO VP 531A OF SZM V16 FA 61 2 H17 3518907020 THERMOSTAT OFF 120 ON 60 H 187 NB 1 H18 3513003410 HOLDER THERMOSTAT PP BK 1 H19 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 2 H20 3510317520 BASE SBHG T0 5 1 H21 3512101400 FOOT DASF 310 2 H22 3518303100 CAPACITOR HV 2100VAC 0 98UF 187 3 0 1 H23 3513003200 HOLDER HV CAPACITOR SECC T0 5 1 H24 3518400400 DIODE HV HVR 1X 3AB 12KV 187 1 H25 ...

Page 38: ...16003700 SPECIAL SCREW TT3 HEX 4X8 FLG MFZN 3 H45 3512807530 HEATER T AS KOC 9Q0T7S 1 H46 3512525510 GUIDE AIR AS KOC 9Q0T7S 1 H47 7112401011 SCREW TAPPING T1 TRS 4 10 MFZN 2 H48 7113400810 SCREW TAPPING T1 BIN 4X8 STS430 MFZN 1 H49 3513304400 INSULATOR HEATER T SBHG T0 4 1 H50 3518903800 THERMOSTAT OFF 160 ON 115 V 187 1 H51 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 1 H52 7S312X40A1 SCREW SPECIAL...

Page 39: ...ortion to fluctuation of power source voltage 2 The allowable tolerance of the secondary voltage is within 5 of nominal voltage NOTE Each measure point must be measured with GND points Terminal 7 8 9 Voltage load DC 13 5 V Voltage no load AC 37 V NO CHECK POINT REMARK 1 IC1 PIN 5 34 35 5VDC 5 2 IC1 PIN 10 3 IC1 PIN 2 OR 3 T 20 ms 50Hz 5V 0V T T 250 ns 4MHz 5V 0V T NO MEASURE POINT WAVE FORM REMEDY...

Page 40: ...39 MEASUREPOINT MP1 MP2 ...

Page 41: ...on oven lamp turns on and fan motor does not rotate but cook indicator in display comes on Cause RELAY 2 does not operate Check method Check method STATE RELAY 1 ON RELAY 1 OFF POINT A 5V DC GND POINT B GND 12V DC B A D8 Q11 23 P12 22 P13 D10 Q13 D11 R31 V2 R21 R32 RY1 MAGNETRON RY2 LAMP TRAY FAN CONV FAN STATE RELAY 2 ON RELAY 2 OFF POINT A 5V DC GND POINT B GND 12V DC 22 P13 R32 RY2 LAMP TRAY FA...

Page 42: ...STATE RELAY 3 ON RELAY 3 OFF POINT A 5V DC GND POINT B GND 12V DC RY3 GRILL D7 Q8 R16 Q7 24 P11 B A 5 Case of no heating of top heater sub When touching GRILL or COMBI or CONVECTION button oven lamp turns on and Fan motor and turntable rotate and cook indicator in display comes on Cause RELAY 4 does not operate STATE RELAY 4 ON RELAY 4 OFF POINT A 5V DC GND POINT B GND 12V DC RY4 CONV HEATER 25 P1...

Page 43: ...n timer does not stop POINT STATE DOOR OPEN DOOR CLOSED A OPEN CLOSE B 5V DC GND CN1 YW396 02V D O M SW 1 2 V2 R9 R10 47K R11 10K C1 104Z 28 P32 4 7K V1 Q6 A1266Y V1 D6 1N4148 A B CHECK NO METHOD REMEDY 1 Check the stage ON OFF of the door open Replace door open monitor switch monitor switch by resistance measurement ...

Page 44: ...43 13 P C B CIRCUIT DIAGRAM ...

Page 45: ...9 R22 24 R27 29 RD AZ103J R CARBON FILM 1 6 10K OHM 5 8 24 R10 30 RD AZ473J R CARBON FILM 1 6 47K OHM 5 2 25 R17 RD AZ105J R CARBON FILM 1 6 1M OHM 5 1 26 R21 RD 4Z510J R CARBON FILM 1 4 51 OHM 5 SMALL 1 27 R31 RD 4Z101J R CARBON FILM 1 4 100 OHM 5 SMALL 1 28 R14 RN AZ1002F R METAL FILM 1 6 10K 1 1 29 R15 RN AZ1203F R METAL FILM 1 6 120K 1 1 30 CR1 5P4R00MTS RESONATOR CERA CRT4 00MS 1 31 RY1 3 5SC...

Page 46: ...S M NO 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 PRINTED DATE Mar 2010 ...

Page 47: ...S KOC 9Q4T7S 9Q4T7WA9 S M 접 수 2009 09 25 1차 2차 일 정 3차 4차 5차 제 판 한 인 인 쇄 쇄 규 격 MEMO 총 46p 연락처 VISION 담 당 방 문 수 TEL 730 0660 FAX 730 3788 09 09 25 전체신규 46p 09 10 14 11p 12p 14p 15p 17p 22p 26p 31p 40p 42p 수정_ 신규 10p 09 10 27 11p 12p 14p 15p 수정_ 신규 4p 09 10 29 11p 12p 수정_ 신규 2p 10 03 03 표지 표지뒤 모델명 추가 KOC 9Q4T7WA9 3p 4p 8p 12p 15p 35p 36p 수정_ 신규 9p ...

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