Daewoo KOC-9U0T7S Service Manual Download Page 1

Page: 1 / 39

Service Manual

Microwave Oven

Model: KOC-9U0T7S

S/M No. : OC9U0T7S01

Mar. 2008

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).

Summary of Contents for KOC-9U0T7S

Page 1: ...0T7S01 Mar 2008 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: ... 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 3 ...

Page 3: ...certified oven unit is found to servicing a microwave emission check should be performed prior to servicing the oven 1 inform the manufacturer importer or assembler 2 repair the unit at no cost to the owner 3 attempt to ascertain the cause of the excessive leakage 4 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 door o...

Page 4: ...EC 705 MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS W X D X H 542X438X329mm 21 5X17 2X13 in CAVITY DIMENSIONS W X D X H 350X367X240mm 13 8X14 4X9 4 in NET WEIGHT Approx 18 2Kg 40 1 lbs TIMER 60 minutes FUNCTION SELECTIONS Microwave Grill Convection Combination POWER SELECTIONS 10 LEVELS CAVITY VOLUME 1 1 Cu Ft SPECIFICATION ARE SUBJECT TO CHANGE WITHOUT NOTICE 2 SPECIFICATIONS ...

Page 5: ...4 3 EXTERNAL VIEW 1 OUTER DIMENSION ...

Page 6: ...l and combi cooking is selected 16 OVEN LAMP Automatically turns on during oven operating 17 SAFETY INTERLOCK SYSTEM 18 CONTROL PANEL 19 Metal Tray Put food or appropriate cookware directly on the metal tray and place on the glass turntable and then place on the roller guide when using convection cooking combination cooking auto cooking or grill cooking 10 COUPLER This fits over the shaft in the c...

Page 7: ...e 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 i...

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

Page 9: ...nning repair work 2 Warning about the electric charge in the high voltage capacitor For about 30 seconds after the operation has stopped 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 10: ...rd 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 assemby NOTE After replacing the door assembly perform a check of correct alignment with the hinge and cavity front plate 9 ...

Page 11: ...02410 GASKET DOOR LUPOL 2300 1 3 To remove door parts 1 Remove the gasket door from door plate 2 Remove the door frame from door plate 3 Remove the stopper hinge top from door plate 4 Remove the spring and the hook 5 Remove barrier screen outer from door frame 6 Reverse the above steps for reassembly Caution In this Manual some parts can be changed for improving their performance without notice in...

Page 12: ...inge 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 NOTE A small gap may be acceptable if the microwave leakage does not exceed 4mW cm2 ...

Page 13: ... B01 B03 B04 B07 B05 B06 B09 B08 1 Remove the screw which secure the control panel push up two snap fits and draw forward the control panel assembly 2 Remove screws which secure the PCB Main manual ASS Y B08 3 Pull out the Main PCB assembly B11 4 Remove screws which secure the PCB Button Manual ASS Y B09 5 Pull out the Knob volume B07 from the Sub PCB assembly 6 Pull out the PCB button manual ASS ...

Page 14: ...r normally closed Magnetron antenna MAGNETRON Metallic gasket plate Cooling fin Filament terminal 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 Remove a screw which secu...

Page 15: ... 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 reasembly 9 To remove H V transformer 1 Remove four screws holding the H V transformer 2 Remove the H V transformer 3 Reverse the above steps for reassembly ...

Page 16: ...410 NUT HEX NUT FLANGE M3X0 7P MFZN 1 C10 7112400808 SCREW TAPPING T1 TRS 4X8 SUS 4 1 Remove four screws C10 from the cavity and pull out the Fan Convection Ass y 2 Remove a nut C9 and pull out the fan C08 and the washer C07 3 Remove two screw machines C05 along with two nuts C06 and pull out the motor shaded pole C04 4 Remove two screws C03 and detach the supporter fan motor C02 from the cover fa...

Page 17: ...ushes the lock lever downward The lock lever presses the button of the interlock monitor switch to bring it under OFF condition No position and 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 Tighte...

Page 18: ...onnection of 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 primary an 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 of p...

Page 19: ...nterlock mechanism and adjust 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 tu...

Page 20: ...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 21: ...k 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 Convection heater is not heated 2 Convection fan and motor does not rotate Check D C volt...

Page 22: ...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 Check if the ...

Page 23: ...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 24: ...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 25: ...ter 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 several...

Page 26: ...MODE MAGNE UPPER LOWER CONVEC TRON ELEMENT ELEMENT TION FAN M W GRILL COMBI CONVECTION ROAST PORK ROAST BEEF ROAST CHICKEN BAKED FISH FRESH VEGETABLES CHILLY PIZZA FROZEN PIZZA FRESH PIZZA STEAM CLEANING MANUAL MODE AUTO MODE PIZZA ...

Page 27: ...26 10 WIRING DIAGRAM ...

Page 28: ...to 6 Disassembly and assembly 2 CONTROL PANEL ASSEMBLY Refer to 6 Disassembly and assembly 3 TOTAL ASSEMBLY B00 F29 F32 F33 F30 F15 F31 F07 A00 F24 D00 F25 F23 F19 F18 F20 F16 F17 F22 F11 F12 F13 F13 F10 F09 F14 F02 F04 C00 F05 F08 F03 F26 F27 F06 F01 F21 F28 ...

Page 29: ... LEVER LOCK POM 1 F11 3513702100 LEVER SW MICRO POM KOG 846T0S 1 F12 4415A17352 SW MICRO VP 533A OF SPNO 187 200G 1 F13 4415A66910 SW MICRO VP 531A OF SZM V16 FA 61 2 F14 3513601600 LAMP BL 240V 25W T25 C7A H187 1 F15 3518903400 THERMOSTAT OFF 150 ON 60 V 187 1 F16 3510313620 BASE SBHG T0 65 1 F17 3512101400 FOOT DASF 310 4 F18 3518303401 CAPACITOR HV 2100VAC 1 05UF 187 1 F19 3513003200 HOLDER HV ...

Page 30: ...ion 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 6 10 Voltage load AC 12 4 V Voltage no load AC 13 3 V NO CHECK POINT REMARK 1 IC1 PIN 2 3 4 5VDC 5 2 IC1 PIN 15 3 IC1 PIN 17 OR 18 T 20 ms 50Hz 5V 0V T T 250 ns 4MHz 5V 0V T NO MEASURE POINT WAVE FORM REMEDY R...

Page 31: ...30 MEASUREPOINT MP1 MP2 ...

Page 32: ...d turntable motor does not rotate but cook indicator in display comes on Cause RELAY 4 does not operate 3 When touching M W button oven lamp turns on and fan motor does not rotate but cook indicator in display comes on Cause RELAY 5 does not operate STATE RELAY 1 ON RELAY 1 OFF POINT A 5V DC GND POINT B GND 12V DC STATE RELAY 4 ON RELAY 4 OFF POINT A 5V DC GND POINT B GND 12V DC STATE RELAY 5 ON R...

Page 33: ... on Cause RELAY 2 does not operate 5 Case of no heating of convection grill When touching 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 2 ON RELAY 2 OFF POINT A 5V DC GND POINT B GND 12V DC STATE RELAY 3 ON RELAY 3 OFF POINT A 5V DC GND POINT B GND 12V DC ...

Page 34: ...or is opened during operation the count down timer does not stop POINT STATE DOOR OPEN DOOR CLOSED A OPEN CLOSE B 5V DC GND CHECK NO METHOD REMEDY Check the stage ON OFF of the door open 1 monitor switch by resistance Replace door open monitor swith measurement ...

Page 35: ...34 13 P C B CIRCUIT DIAGRAM ...

Page 36: ...0K 5 1 21 R16 17 RD AZ104J R CARBON FILM 1 6W 100K 5 2 22 R12 RD AZ105J R CARBON FILM 1 6W 1M 5 1 23 R10 RN AZ1002F R METAL FILM 1 6W 10K 1 1 24 R9 RN AZ1203F R METAL FILM 1 6W 120K 1 1 25 R26 RD 4Z510J R CARBON FILM 1 4W 51 5 1 26 R25 RD 4Z101J R CARBON FILM 1 4W 100 5 1 27 R28 29 RD 2Z270JS R CARBON FILM 1 2W 27 5 SMALL 2 28 CR1 5P4R00MTS RESONATOR CERA CRT 4 00MS 1 29 VL1 1CPMC7805C IC REGULATO...

Page 37: ...1340 PCB SUB 95 3X215 1 48 R101 R102 RD AZ102J RESISTOR 1 6W 1K 5 2 49 EN101 5S10302005 SW ROTARY EC12E24204A8 1 50 SW101 SW111 5S50101Z93 SW TACT KPT 1115AM 11 51 J105 85801052GY WIRE COPPER 7 5mm 1 0 52 TIN COATING 1 52 J101 102 104 106 85801052GY WIRE COPPER 10mm 1 0 52 TIN COATING 4 53 J103 85801052GY WIRE COPPER 12 5mm 1 0 52 TIN COATING 1 54 WF1 WSJ 159007 WIRE FLAT 1 25X15X90XC 1 ...

Page 38: ...S M NO DAEWOO ELECTRONICS CORP 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC PRINTED DATE Mar 2008 ...

Page 39: ...8 _ D a 3 4 b c K 789d COB B B efgd COB OCMM hij klm no pqrstu BMNBONLP vwxZ 1BI BMNBONL1 TIy LCI KSzxZLI BMNBONL PCIy PMIy P Iy LBIy L Iy OBIy OPIy OLIy OOIy O1Iy OTIKS ELI UGzxZ PPI BMNB1NBL TIy PLIy LPIy LTIy L Iy OBI KSz xZ I BMNB1NB1 PLI KSz xZ PI BMNB1NBC CIy L I KSz xZ LI ABOUT THIS MANUAL ABOUT THIS MANUAL ...

Search results

Summary of Contents for KOC-9U0T7S

Reviews:

Related manuals for KOC-9U0T7S

Brands by name

Popular brands

Daewoo KOC-9U0T7S, Service Manual

Search results

Summary of Contents for KOC-9U0T7S

Reviews:

Related manuals for KOC-9U0T7S

Brands by name

Popular brands