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Daewoo KOC-9Q4T manual

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Table of contents for the manual

  • Page 1

    Ser vice Manual Micr owave Oven Model: KOC-9Q4T 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). OC9Q3T7S01[...]

  • Page 2

    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 WE[...]

  • Page 3

    4 3. EXTERNAL VIEW 382 513 311 1. OUTER DIMENSION 1) KOC-9Q3T7S 383 513 311 2) KOC-9Q4T[...]

  • Page 4

    5 1 23 4 5 6 7 8 9 10 11 12 13 1 1. DOOR HOOK Hook automatically locks and holds the door when the door shuts. If the door opens while the oven is operating, the oven will stop operating immediately. 1 2. DOOR SEAL Door seal prevents the microwave leakage from the oven cavity. 1 3. DOOR VIEWING SCREEN Food, inside of oven, can be observed through t[...]

  • Page 5

    8 1 1 Display : Cooking time, power level, program indicators and present time are displayed. MW ( ): When blinking, the oven is operating in MICROWAVE COOK mode. Grill ( ): When blinking, the oven is operating in GRILL mode. Combi ( ): When blinking, the oven is operating in COMBI mode. Convection ( ): When blinking, the oven is operating in CONVE[...]

  • Page 6

    22 8. TR OUBLESHOO TING 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 load wire from these p[...]

  • Page 7

    23 CONDITION CHECK Check continuity of magnetron Defective magnetron. RESULT No continuity CAUSE REMEDY Replace Outlet has proper voltage fuse does not blow? Check continuity of noise filter board Defective line filter board No continuity Replace Check continuity of power supply cord Defective touch control circuit Replace Open power supply cord No[...]

  • Page 8

    24 TROUBLE 3) No microwave oscillation even though fan motor rotates. CONDITION CHECK RESULT Check continuity of high voltage capacitor terminals with wires removed Continuity CAUSE Defective high voltage transformer Defective high voltage fuse REMEDY 1 Replace No microwave oscillation Check continuity of high voltage rectifier in forward and backw[...]

  • Page 9

    25 (TROUBLE 4) Grill heater (upper heater) is not heated; food will not become hot. CONDITION CHECK Check continuity of primary interlock switch Malfunction of primary Interlock switch RESULT No continuity CAUSE REMEDY CAUSE REMEDY Adjust or replace Main heater is not heated. Check D.C voltage being supplied to RELAY (RY3) coil Faulty contacts of R[...]

  • Page 10

    26 CONDITION CHECK Check each button for continuity of the button Malfunction of touch control circuit of control box sub-assembly RESULT Normal CAUSE REMEDY Replace control box sub-assembly Display does not show programming at all, even if keyboard is touched. (TROUBLE 6) The following visual conditions indicate a probable defective touch control [...]

  • Page 11

    27 9. MEASUREMENT AND TEST 1. MEASUREMENT OF THE MICRO W A VE PO WER 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[...]

  • Page 12

    28 2. MICRO W A VE RADIA TION TEST PROCEDURE 1. Prepare Microwave Energy Survey Meter, 600cc glass beaker, and glass thermometer 100°C (212°F). 2. Pour 275cc ± 15cc of tap water initially at 20 ± 5°C (68 ± 9°F) in the 600 cc glass beaker with an inside diameter of approx. 95 mm(3.5 in.). 3. Place it at the center of the tray and set it in a [...]

  • Page 13

    29 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 capa[...]

  • Page 14

    31 10. WIRING DIA GRAM[...]

  • Page 15

    35 1. DOOR ASSEMBL Y Refer to 6. Disassembly and assembly. 2. CONTROL P ANEL ASSEMBL Y Refer to 6. Disassembly and assembly. 3. T O T AL ASSEMBL Y 2) KOC-9Q4T 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[...]

  • Page 16

    36 ✔ 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). H01 3516119900 CAVITY AS KOC-9Q0T7S 1 H02 3511403800 COVER WAVE GUIDE MICA T0.35 1 H03[...]

  • Page 17

    37 ✔ 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). H39 3512529400 GUIDE WIND AS KOC-9Q0T7S 1 H40 7122401211 SCREW TAPPING T2S TRS 4X12 MF[...]

  • Page 18

    38 12. PRINTED CIRCUIT BO ARD CIRCUIT CHECK PROCEDURE 1. Low voltage transformer check The low voltage transformer is located on the P.C.B. Measuring condition: Input voltage: 230V / Frequency: 50Hz 2. Voltage Check - Key check point - Check method NOTE 1. Secondary side voltage of the low voltage transformer changes in proportion to fluctuation of[...]

  • Page 19

    39 MEASUREPOINT MP1 MP2[...]

  • Page 20

    40 3. Case of no microwave oscillation 1) When touching M/W button, oven lamp turns on and Fan motor and turntable rotate, and cook indicator in display comes on. *Cause: RELAY 1 does not operate. 2) When touching M/W button, oven lamp does not turn on and turntable motor does not rotate but cook indicator in display comes on. *Cause: RELAY 2 does [...]

  • Page 21

    41 4. Case of no heating of top heater main. 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 3 does not operate. 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 [...]

  • Page 22

    42 - Check method 6. Case of no stopping of the count down timer When the door is opened during operation, the count down 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 AB CHECK NO METHOD REMEDY 1 Check the stage(ON,OFF) [...]

  • Page 23

    43 13. P .C.B. CIRCUIT DIA GRAM[...]

  • Page 24

    44 1 BZ1 3515600100 BUZZER BM-20K 1 2 CA1 CN5XB-102M C ARRAY 6P(5) 1000PF M 50V 1 3C 7 CCZF1H473Z C CERA 50V HIKF 0.047uF Z 1 4 C4,C6 CCZB1H102K C CERA 102K 50V AXIAL 2 5 C1~3,C5,C8,C9 CCZF1H104Z C CERA 50V HIKF 0.1uF Z 6 6 EC1 CEXE1H100A C ELECTRO 50V RSS 10MF 1 7 EC2 CEXF1E102V C ELECTRO 25V RSS 1000uF 1 8 CN1 3519150520 CONN WAFER YW396-02V 1 9 [...]

  • Page 25

    S/M NO. : D AEWOO ELECTR ONICS 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[...]