Daewoo KOC-8H6T7S Service Manual Download Page 1

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Service Manual

Microwave Oven

Model: KOC-8H6T7S

S/M No. : OC8H6T7S01

Nov. 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-8H6T7S

Page 1: ...6T7S01 Nov 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: ...ansmission line and cavity 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 ...

Page 3: ...y 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...

Page 4: ...GY OUTPUT 900W IEC705 MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS W X H X D 501X473X391mm 19 7X18 6X12 6 in CAVITY DIMENSIONS W X H X D 310X328X232mm 12 2X12 9X9 1 in NET WEIGHT APPROX 18kg 39 6 lbs TIMER 60 minutes FUNCTION SELECTIONS MICROWAVE GRILL CONVECTION COMBINATION POWER SELECTIONS 10 LEVELS CAVITY VOLUME 0 83 Cu Ft Specifications are subject to change without notice ...

Page 5: ...4 3 EXTERNAL VIEW 501 319 473 1 OUTER DIMENSION ...

Page 6: ...ide when using the microwave features Place food or microwave safe cookware directly on the glass turntable NOTE Glass Turntable is atteched to the right cushion 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 ROLLER GUIDE ...

Page 7: ...maged 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 it is colder than room temperature This may occur dur...

Page 8: ...Dial Knob could be inserted in Press once more The Dial Knob is pulled out 0 0 Clock Used to set clock q q Check Used to check the selected cooking mode when the oven is operating When pressing the Check button on operating Cooking mode is displayed for five seconds w w Selection Used to select e e Stop Clear used to stop the oven operation or to delete the cooking data r r Start Speedy Cook Press...

Page 9: ... example Please use the Glass Turntable Tray and the Metal Tray 3 3 OPERATION GUIDE DISPLAY Use the oven easily by following the operation guide display Selection If is blinking press the Selection button Control If is blinking turn the Control Dial Knob Temperature Whenever is lighting Control is blinking Turn the Control Dail Knob to set temperature Cooking time Whenever is lighting Control is b...

Page 10: ...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 15A fuse is blown out ...

Page 11: ...d 2 To remove guide wind 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 replacting the door assembly perform a check of correct alignment with the hinge and cavity front plate ...

Page 12: ...A T0 7 1 A02 3513101310 HOOK POM 1 A03 3515101310 SPRING HOOK HSW 3 1 A04 3512209940 FRAME DOOR XR 401 SR 0320 1 A05 3511616310 DECORATOR DOOR AL TO 6 1 A06 3517009650 BARRIER SCREEN O SEAL AS KOC 8H6TKS SILICON 1 A07 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 4 A08 3512301300 GASKET DOOR PBT 1 A09 3515203600 STOPPER HINGE T AS KOC 970T1S 1 Caution In this Manual some parts can be changed for impr...

Page 13: ...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 14: ...CREW TAPPING T2S TRS 4X12 MFZN 11 B08 PKMPMSGM10 PCB MAIN MANUAL AS KOC 8H6T7S 1 1 Remove the screws 2 Pull out the Main PCB assembly 3 Pull out the Knob Dial AS 4 Remove the Holder LED 5 Remove the button function 6 Remove decorator ring from control panel 7 Remove decorator c panel from control panel 8 Reverse the above steps for reassembly Caution In this Manual some parts can be changed for im...

Page 15: ... 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 16: ... 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 17: ...0W 270MM 1 2 3512806900 HEATER REFLECTOR STS430 T0 5 1 3 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 2 4 3511412400 COVER HEATER T SA1D 80 T0 5 1 5 3510610500 BRACKET COVER HEATER SECC T0 5 1 6 7112401011 SCREW TAPPING T1 TRS 4 10 MFZN 1 7 3512523600 GUIDE AIR OUTLET SBHG T0 5 1 8 7112401011 SCREW TAPPING T1 TRS 4 10 MFZN 1 1 Remove a screw 8 and pull out Guide air outlet 7 2 Remove screws 6 and pul...

Page 18: ...1 11 3512782600 HARNESS CONVECTION A KOC 8H5T7S 1 12 3512782610 HARNESS CONVECTION B KOC 8H5T7S 1 13 7402704600 RING C CR 5 SK5 1 14 7122400611 SCREW TAPPING T2S TRS 4X6 MFZN 4 15 3511412600 COVER B SBHG 3 T0 4 1 16 3511410500 COVER MOTOR B SA1D 80 T0 5 1 17 7272400811 SCREW TAPTITE TT3 TRS 4X8 MFZN 1 18 7112401011 SCREW TAPPING T1 TRS 4 10 MFZN 1 1 Remove a screw 17 and pull out Cover motor B 16 ...

Page 19: ...lock lever moves smoothly after adjustment is completed d Tighten completely two mounting screws 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 SWITCH MOUNTING BRACKET DOOR LATCH DOM SWIT...

Page 20: ...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 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 contact...

Page 21: ...ust 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 be...

Page 22: ...ads to magnetron terminal and magnetron body Continuity Defective magnetron 2 1 Check resistance of primary and secondary coil of high voltage transformer 0 Ωor 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 ...

Page 23: ...ce Check 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 does not rotate Check D C voltage...

Page 24: ...tions 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 One or more digits in the display are not on when they should be 4 Display does not count down or ...

Page 25: ...for the water temperature to attain 20ºC 2ºC 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 26: ...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 27: ...meter 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 sever...

Page 28: ...27 4 COMPONENT ACTION COOKING MODE M W MANUAL GRILL MODE COMBI CONVECTION ROAST PORK AUTO ROAST BEEF MODE ROAST CHICKEN BAKED FISH FRESH VEGETABLES MAGNE TRON UPPER ELEMENT REAR ELEMENT CONVEC TION FAN ...

Page 29: ...OCK SWITCH HIGH VOLTAGE COM NO NC GE BL BR SINGLE PHASE POWER SUPPLY FUSE L N LINE FILTER ASS Y GN L N BL D O M SWITCH CONTROL P W B ASS Y RD H V FUSE RD RD RD RD WH BK BK BL RD ONLY L N WH WH FAN RELAY CONVECTION LAMP POWER T MOTOR RELAY HEATER RELAY THERMISTOR L V TRANSFORMER BL GN GREEN CONVECTION HEATER CM RD NOTE TTM TURNTABLE MOTOR BK TOP HEATER TOP HEATER RELAY YW BK BK BL RD YW WH RELAY RD...

Page 30: ...y and assembly 3 TOTAL ASSEMBLY 003 023 029 026 015 004 005 016 025 017 024 021 008 028 039 018 019 006 064 067 065 030 001 002 066 037 040 038 063 032 031 034 F37 035 033 036 048 068 069 072 073 071 070 007 009 010 011 012 013 014 020 022 027 041 044 042 043 045 046 047 049 052 050 058 062 060 056 057 055 051 054 059 053 061 074 075 ...

Page 31: ...AC 1 05UF 187 1 18 3513001900 HOLDER HV CAPACITOR SECC T0 5 1 19 3518401300 DIODE HV CL01 12 1 20 7272400811 SCREW TAPTITE TT3 TRS 4X8 MFZN 1 21 3518701400 FUSE HV 5KV 0 7A 1 22 3515202800 STOPPER HINGE U AS KOR 121M0A 1 23 7S312X40A1 SCREW SPECIAL T1 TRS 4 10 SE MFZN 5 24 3518122830 TRANS HV R1S59B ES00 AL AL 1 25 3516003700 SPECIAL SCREW TT3 HEX 4X8 FLG MFZN 4 26 PKCPSWGM10 CONTROL PANEL AS KOC ...

Page 32: ...ZN 2 54 7113400814 SCREW TAPPING T1 BIN 4X8 MFNI 3 55 7400104011 WASHER PLAIN PW 1 4 MFZN 1 56 3511800700 FAN CONVECTION SA1D 80 T0 5 1 57 7S627W40X1 NUT HEX NUT FLANGE M4X0 7P MFZN 1 58 3511800900 FAN PBT 1 59 3512782600 HARNESS CONVECTION A KOC 8H5T7S 1 60 3512782610 HARNESS CONVECTION B KOC 8H5T7S 1 61 7402704600 RING C CR 5 SK5 1 62 7122400611 SCREW TAPPING T2S TRS 4X6 MFZN 4 63 3518907400 THE...

Page 33: ...32 12 PRINTED CIRCUIT BOARD 00 1 2 3 45 6 4 1 2 6 725 289 2 0 24 3 45 6 4 24 ABCD ...

Page 34: ...33 13 P C B PATTERN DIAGRAM EF GH E ...

Page 35: ...34 14 P C B CIRCUIT DIAGRAM ...

Page 36: ...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 Nov 2008 ...

Page 37: ...KL LM M I I L L9 9 I IH H3 3 NO PQR STU VWX YZ ABOUT THIS MANUAL ABOUT THIS MANUAL _ Yab c L d 3ef1V gJ hJi j k l mmf no pVqYXr s t p F u v w x x y y z L IJI H _ l L gpmemVVm M gpmepgff mf eCƒ z pV0 mf pe 09 09 p 0 lt z p0 ...

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