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PRECAUTIONS TO BE OBSERVED BEFORE AND

DURING SERVICING TO AVOID POSSIBLE

EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

Do not operate or allow the oven to be operated with the door open.

Make the following safety checks on all ovens to be serviced before activating the magentron or other microwave
source, and make repairs if necessary: (1) Interlock operation, (2) proper door closing, (3) Seal and sealing surfaces
(arcing, wear, and other damage), (4) Damage to or loosening of hinges and latches, (5) Evidence of dropping or
abuse.

Before turning on power to the microwave oven for any service test or inspection within the microwave generating
compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and
connections.

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.

(a)

(b)

(C)

(d)

1. SAFETY AND PRECAUTIONS

2. SPECIFICATIONS

3. EXTERNAL VIEW

3-1. OUTER DIMENSION
3-2. FEATURE DIAGRAM

4. INSTALLATION

5. CONTROL PANEL

6. DISASSEMBLY AND ASSEMBLY

7. INTERLOCK MECHANISM AND ADJUSTMENT

8. TROUBLE SHOOTING GUIDE

9. MEASUREMENT AND TEST

9-1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT
9-2. MICROWAVE RADIATION TEST
9-3. COMPONENT TEST PROCEDURE
9-4. COMPONENT ACTION

10. WIRING DIAGRAM

11. EXPLODED VIEW AND PARTS LIST

11-1. DOOR ASSEMBLY
11-2. CONTROL PANEL ASSEMBLY
11-3. TOTAL ASSEMBLY

12. PRINTED CIRCUIT BOARD

13. P.C.B CIRCUIT DIAGRAM

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TABLE OF CONTENTS

TABLE OF CONTENTS

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Содержание KOC-910K0P(AL)

Страница 1: ...Service Manual Microwave Oven Model KOC 910K0P AL DAEWOO ELECTRONICS CO LTD S M No C910K0PAL1 http svc dwe co kr Mar 2002 ...

Страница 2: ...lignment integrity and connections 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 a b C d 1 SAFETY AND PRECAUTIONS 2 SPECIFICATIONS 3 EXTERNAL VIEW 3 1 OUTER DIMENSION 3 2 FEATURE DIAGRAM 4 INSTALLATION ...

Страница 3: ...s 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 open the service perso...

Страница 4: ... 60minutes MICROWAVE GRILL CONVECTION COMBINATION 10 LEVELS 1 0 Cu Ft MODEL POWER SUPPLY MICROWAVE GRILL CONVECTION COMBINATION MICROWAVE ENERGY OUTPUT MICROWAVE FREQUENCY OUTSIDE DIMENSIONS W H D CAVITY DIMENSIONS W H D NET WEIGHT TIMER FUNCTION SELECTIONS POWER SELECTIONS CAVITY VOLUME POWER CONSUMPTION 1 OUTER DIMENSION KOC 910K 2 SPECIFICATIONS 3 EXTERNAL VIEW 542 329 515 ...

Страница 5: ...ly turns on during oven operating 6 SAFETY INTERLOCK SYSTEM 7 CONTROL PANEL 8 TURNTABLE TRAY Rotates during cooking and ensure even distribution of Microwaves It can also be used as a cooking utensil 9 ROLLER GUIDE This must always be used for cooking together with the turntable tray 10 COUPLER This fits over the shaft in the center of the ovens cavity floor This is to remain in the oven for all c...

Страница 6: ...l air vents should be kept a clearance If all vents are covered during operation the oven may overheat and eventually cause failure The minimum height of free space necessary above the top surface of the oven is minimum 100mm 3 Away from Radio and TV sets Poor television reception and radio interference may result if the oven is located close to a TV Radio antenna or feeder and so on Position the ...

Страница 7: ...ce time from cooking 10 CLOCK Use to set clock 11 LANGUAGE Press to select the language 12 CRUSTY Press to select crusty menu 13 CAKE Press to select cake menu 14 MEMORY Use to set favorite cooking mode 15 AUTO COOK Press to select auto cook menu 16 M W Press to select microwave power level 17 GRILL Press to select grill 18 AUTO DEFROST Press to select defrost menu 19 CONVECTION Press to select co...

Страница 8: ...ng 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 capactior by using a properly insulated screwdriver to discharge 4 When the 15A fuse is blown out due...

Страница 9: ...DESCRIPTION PC PC TEMP GLASS T3 2 KOC 1B0K0S PBT T2S TRS 4 8 MFZN POM PW1 KOC 910K0S Q TY 1 1 1 1 1 2 1 1 1 REMARK 1 To remove cabinet 1 Remove four screws on cabinet back 2 Push the cabinet backward 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 assembly 3 To remove door parts KOC 9...

Страница 10: ...ssembly 4 Method to reduce the gap between the door seal and the oven front surface 1 To reduce gap located on part A Loosen two screws on stopper hinge top and then push the door to contact the door seal to oven front surface Tighten two screws 1 To reduce gap located on part B Loosen two screws on stopper hing under and then push the door to contact the door seal to oven front surface Tighten tw...

Страница 11: ...12 MFZN KOC 910K0S T2S PAN 3 10 MFZN KOC 910K0S ABS SG 175 SG 0760D ABS SG 175 SG 0760D ABS SG 175 SG 0760D ABS SG 175 SG 0760D Q TY 1 1 1 1 1 4 1 8 1 1 1 1 1 REMARK 5 To remove control panel parts KOC 910K 1 Remove the screw which secure the control panel push up two snap fits and draw forward the control panel assembly 2 Remove four screws B06 which secure the PCB Main ASS Y 3 Pull out the Main ...

Страница 12: ... metallic gasket plate which is packed with each magnetron to prevent microwave leakage Whenever repair work is carried out on magnetron check the microwave leakage It shall not exceed 4mW cm2 for a fully assembled oven with door normally closed CAUTION Never install the magnetron without the metallic gasket plate which is packed with each magnetron to prevent microwave leakage Whenever repair wor...

Страница 13: ...s for reassembly 8 To remove wind guide assembly 1 Remove a screw for earthing 2 Remove a screw which secure the wind guide assembly 3 Draw forward the wind guide assembly 4 Pull the fan from the motor shaft 5 Remove two screws which secure the motor shaded pole 6 Remove the motor shaded pole 7 Reverse the above steps for reassembly ...

Страница 14: ...e above steps for reassembly 10 To remove Lamp assembly parts 5 8 7 6 9 4 3 2 1 REF NO 1 2 3 4 5 6 7 8 9 PART CODE 7112401011 3512520500 3513303000 7112401011 3511407800 7112401011 3513003900 3513602600 3511407810 PART NAME SCREW TAPPING GUIDE AIR OUTLET INSULATOR HEATER T SCREW TAPPING COVER LAMP SCREW TAPPING HOLDER LAMP AS LAMP COVER LAMP DESCRIPTION T1 TRS 4 10 MFZN SA1D T0 5 SECC T0 5 T1 TRS ...

Страница 15: ...rse the above steps for reassembly 11 To remove Top heater assembly parts 1 2 3 4 5 6 7 8 REF NO 1 2 3 4 5 6 7 8 PART CODE 7112401011 3512520500 3513303000 7112401011 3512767000 3510607700 3512804700 3511407600 PART NAME SCREW TAPPING GUIDE AIR OUTLET INSULATOR HEATER T SCREW TAPPING HARNESS HEATER BRACKET HEATER T HEATER MIRACLON COVER HEATER T DESCRIPTION T1 TRS 4 10 MFZN SA1D T0 5 SECC T0 5 T1 ...

Страница 16: ... 5 6 7 8 9 10 11 12 13 14 15 16 17 18 PART CODE 7112401011 3511407300 7112401011 3511407900 3512766900 3512804700 3511407700 7113400814 7400504211 3511800700 7391400065 3512766800 7051400811 3513302900 7113400814 3963330100 3511800800 7402704600 PART NAME SCREW TAPPING COVER MOTOR B SCREW TAPPING COVER B HARNESS CONVECTION B HEATER MIRACLON COVER HEATER B SCREW TAPPING WASHER PLAIN FAN CONVECTION ...

Страница 17: ... the Cover heater U 6 Reverse the above steps for reassembly 13 To remove Motor synchro And Under heater assembly parts 3 4 5 1 2 CUTTING 6EA REF NO 1 2 3 4 5 PART CODE 7112401011 3511407500 3515304000 3512802000 7113400814 PART NAME SCREW TAPPING COVER HEATER U SUPPORTER HEATER U HEATER U SCREW TAPPING DESCRIPTION T1 TRS 4 10 MFZN STS430 T0 5 STS430 T0 5 230V 400W R18374001 T1 BIN 4 8 MFNI Q TY 1...

Страница 18: ...erlock monitor switch to bring it under OFF condition and presses the button of the secondary interlock switch to bring it under ON condition 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 ADJUSTMENT Interlock m...

Страница 19: ...d connection of the terminals and power cord before check the parts listed below CONDITION RESULT CAUSE REMEDY Continuity No continuity Malfunction of Interlock monitor switch Replace CHECK Fuse blows Check continuity of interlock monitor switch with door closed NO Continuity Continuity Malfunction of Interlock monitor switch Replace Check continuity of both primary and secondary interlock switch ...

Страница 20: ...turn on Check continuity of primary interlock switch No continuity Malfunction of secondary interlock and D O Mswitch Adjust or replace Check continuity of secondary interlock and D O M switch 0 V Defective touch control Circuit Replace Approx 24V DC Fault contacts of RELAY RY4 or open relay coil Replace NOTE All these switches must be replaced at the same time please refer to 7 Interlock mechanis...

Страница 21: ...e Connect megger leads to magnetron terminal and magnetron body Ω or Defective high voltage transformer Replace Check resistance of primary and secondary coil of high voltage transformer No continuity Defective magnetron Replace Check continuity of magnetron heater with wires removed No continuity Defective high voltage transformer Replace Check continuity of filament terminal of high voltage tran...

Страница 22: ...n heater is not heated food will not become hot 2 Convection fan motor does not rotate CONDITION RESULT CAUSE REMEDY CHECK 1 Convection heater is not heated 2 Convection fan and motor does not rotate No continuity Malfunction of primary interlock switch Adjust or replace Check continuity of primary interlock switch No continuity Malfunction of secondary interlock switch Adjust or replace Check con...

Страница 23: ...nt 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 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 fa...

Страница 24: ...lace Replace Check continuity of thermistor resistance of thermistor TROUBLE 8 When ERROR 2 ERROR 3 come on display Approx 200k 300kΩ room temperature No continuity Defective heater Replace Check continuity of heater convection upper lower Continuity Defective touch control circuit Replace ...

Страница 25: ...ed on the center of the shelf which is in the lowest normal position 4 Microwave power is switched on 5 Heating time should be exactly A seconds Refer to table as following Heating time is measured while the microwave generator is operating at full power The filament heatup time for magnetron is not included 6 The initial and final temperature of water in selected so that the maximum difference be...

Страница 26: ...oor 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 2 in fro...

Страница 27: ...eter 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 and infinite resistance may be read in both directions A normal diode s resistance will be infinite in one direction and sever...

Страница 28: ... MODE MANUAL MODE ONE TOUCH AUTO MODE M W GRILL 1 GRILL 2 GRILL 3 COMBI 1 COMBI 2 COMBI 3 COMBI 4 COMBI 5 CONVECTION 100 130 CONVECTION 140 150 CONVECTION 160 250 CAKE BREAD CRUSTY ROAST BEEF ROAST CHICKEN ROAST PORK BAKED FISH BAKED POTATO ROAST POTATO FRESH VEGETABLES FROZEN VEGETABLES CASSEROLE ...

Страница 29: ...ION HEATER RELAY TOP HEATER RELAY BL BL BK WH RD RD BK BK YW YW YW WH BK WH GN GN 28 10 WIRING DIAGRAM 28 10 WIRING DIAGRAM YW YELLOW BR BROWN OFF COOK DOOR CLOSED CONDITION CM CONVECTION FAN MOTOR OL OVEN LAMP FM FAN MOTOR RD RED WH WHITE BK BLACK BL BLUE GE GREEN YELLOW GN GREEN TTM TURNTABLE MOTOR NOTE TTM FM SECONDARY PRIMARY INTERLOCK INTERLOCK MONITOR SWITCH TRANSFORMER MAGNETRON H V DIODE C...

Страница 30: ...12 F15 F44 F45 F46 F47 F48 F43 F42 F81 F41 F40 F39 F38 F37 F51 F50 F49 F25 F35 F36 F55 F54 F56 F57 F59 F60 F58 F80 F77 F76 F75 F74 F73 F22 F20 F21 F61 F62 F63 F64 F65 F66 F67 F68 F69 F70 F71 F72 F02 F78 F79 1 DOOR ASSEMBLY Refer to 6 Disassembly and assembly 2 CONTROL PANEL ASSEMBLY Refer to 6 Disassembly and assembly 3 TOTAL ASSEMBLY KOC 910K F82 ...

Страница 31: ...HVCAPAITOR SCREWTAPTITE COVERHEATER U SCREWTAPPING SUPPORTERHEATER U HEATER U SCREWTAPPING MOTORSYNCRO SCREWTAPPING COUPLER COVERWAVEGUIDE CAVITYJOINTAS SCREWTAPPING MAGNETRON SPECIALSCREW LOCK LEVERSWMICRO SWMICRO SWMICRO LEVERLOCK HARNESSMAIN NUTHEX FANCONVECTION WASHERPLAIN SCREWTAPPING KOC 910K0S KOC 910K0S KOR 121M0A TT3 TRS 4 x 8 MFZN SBHG T0 8 T1 TRS 4 x 10 MFZN DASF 310 TT3 HEX 4 x 8 FLG M...

Страница 32: ...MOTOR B FAN MOTOR SHADED POLE GUIDE WIND SCREW TAPPING SCREW TAPPING CORD POWER AS SCREW TAPPING LAMP SCREW TAPPING THERMOSTAT SCREW SPECIAL CABINET PAINTING AS SCREW TAPPING SCREW TAPPING INSTUALTOR HEATER T GUIDE AIR OUTLET SCREW TAPPING COVER LAMP COVER HEATER T HEATER MIRACLON BRACKET HEATER T HARNESS HEATER KOC 1B0K0S SA1D T0 5 SA1D T0 5 T1 BIN 4 8 MFNI 220V 60Hz MW10GA T01 PP GF20 PAN 4 8 PW...

Страница 33: ... TRAY RACK AS TRAY RACK AS TRAY METAL GUIDE ROLLER AS SPECIAL SCREW SENSOR TEMPERATURE SCREW TAPPING COVER LAMP RING C KOC 961C0S 117MM KOC 961C0S 27MM SPP T0 6 KOC 1B0K0S TT3 HEX 4 x 8 FLG MFZN PTM K312 D7 T1 TRS 4 x 10 MFZN T GLASS T2 0 CR 5 SK5 1 1 1 1 2 1 1 1 1 NO PART CODE PART NAME DESCRIPTION Q TY 1 F82 3518701400 FUSE HV 5KV 0 7A ...

Страница 34: ...ndary side voltage of the low voltage transformer changes in proportion 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 to measured with GND points 1 2 6 7 8 9 10 Terminal 6 7 8 9 9 10 Voltage load AC 17 0 V AC 1 3 V AC 1 3 V Voltage no load AC 19 9 V AC 1 6 V AC 1 6 V NO CHECK POINT REMARK 5V 0V ...

Страница 35: ...ase 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 STATE POINT A POINT B RELAY 1 ON RELAY 1 OFF 5V DC GND GND 24V DC M W RY1 1N4148 C106M 46 G5G 1A DT 24V D9 Q2 B A STATE POINT A POINT B RELAY 4 ON RELAY 4 OFF 5V DC GND GND 24V DC STATE POINT A POINT B RELAY 5 ON RELA...

Страница 36: ...7 does not operate 4 Case of no heating of upper grill When touching GRILL 1 COMBI button oven lamp turns on and Fan motor and turntable rotate and cook indicator in display comes on Cause RELAY 2 does not operate STATE POINT A POINT B RELAY 2 ON RELAY 2 OFF 5V DC GND GND 24V DC UPPER GRILL RY2 1N4148 C106M 45 G5G 1A DT 24V D10 Q3 B A STATE POINT A POINT B RELAY 7 ON RELAY 7 OFF 5V DC GND GND 24V ...

Страница 37: ...own timer does not stop POINT A POINT B DOOR OPEN DOOR CLOSED OPEN CLOSE 5V DC GND METHOD REMEDY CHECK NO 1 Check the stage ON OFF of the door open monitor switch by resistance measurement Replace door open monitor swith CN1 D8 R18 R17 C8 B 5V 1 2 A D O M SW 35313 0210 1N4148 1K 10K 53 104Z POINT STATE ...

Страница 38: ...37 13 P C B CIRCUIT DIAGRAM ...

Страница 39: ...BSB UZ 5 6BSB UZ 13BSA UZ 24BSB HNM 07MS12 NYLON 66 TMP87CK14N 3D99 92 5 220 1 6W 10K Ohm 5 1 6W 1K Ohm 5 1 6W 200 Ohm 5 1 6W 1M Ohm 5 1 6W 4 7 K Ohm 5 1 6W 47K Ohm 5 1 4W 1K Ohm 5 1 2W 270 Ohm 5 1 2W 27 Ohm 5 1 2W 200 Ohm 5 1 4W 301K Ohm 1 1 4W 10K Ohm 1 1 4W 120K Ohm 1 7P 6 1 8 100K 5 7P 6 1 8 100K 5 5P 4 1 8 100K 5 CRT4 00MS G5G 1A DT 24V CS11 24SH KTA1266Y AUTO KTC3198GR AUTO KTC 1027Y AUTO KR...

Страница 40: ...S M NO C910K0PAL1 DAEWOO ELECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC PRINTED DATE Mar 2002 ...

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