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Service Manual

Microwave Oven

Model: KOC-1B4K0S

KOC-1B4K0S01

KOC-1B4K0S10

KOC-1B4K0S20

KOC-1B4K0S31

KOC-1B4K9SA1

KOC-1B4K5S

KOC-1B4K5S10

S/M No. : OC1B4K0001

Dec. 2005

✔

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

Summary of Contents for KOC-1B4K0S

Page 1: ...0S31 KOC 1B4K9SA1 KOC 1B4K5S KOC 1B4K5S10 S M No OC1B4K0001 Dec 2005 Caution In this Manual some parts can be changed for improving their performance without notice in the parts list So if you need th...

Page 2: ...justed 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...

Page 3: ...y 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 t...

Page 4: ...ING PHASE WITH EARTHING MICROWAVE 1500W POWER GRILL 1600W CONSUMPTION CONVECTION 2300W COMBINATION 3100W 2300W MICROWAVE ENERGY OUTPUT 1000W IEC705 MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS W X H...

Page 5: ...TY INTERLOCK SYSTEM 17 CONTROL PANEL 18 TURNTABLE TRAY Rotates during cooking and ensure even distribution of Microwaves It can also be used as a cooking utensil 19 ROLLER GUIDE This must always be us...

Page 6: ...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 misal...

Page 7: ...from cooking 11 more Use to add time to cooking 12 m w Press to select microwave power level 13 combi Press to select combi cooking mode 14 auto defrost Press to select defrost menu 15 convection Pres...

Page 8: ...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...

Page 9: ...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 reassembly NOTE After replacing the door...

Page 10: ...ATOR DOOR U STS304 T0 5 1 A04 3511605400 DECORATOR DOOR T STS304 T0 5 1 A05 3511605700 DECORATOR DOOR L STS304 T0 5 1 A06 3511605600 DECORATOR DOOR R STS304 T0 5 1 A07 3512204740 FRAME DOOR PC 1 70015...

Page 11: ...r 9 Reverse the above steps for reassembly 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...

Page 12: ...KOC 1B4K 1 B10 7121301011 SCREW TAPPING T2S PAN 3X10 MFZN 7 KOC 1B4K0S PKMPMSAD00 KOC 1B4K0S 1B4K0S10 1B4K0S20 B11 MAIN PCB ASSY 1 KOC 1B4K0S01 PKMPMSAD10 KOC 1B4K0S01 1B4K0S31 1B4K9SA1 PKMPMSAD20 KOC...

Page 13: ...door normally closed Magnetron antenna 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 diod...

Page 14: ...ssembly 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 r...

Page 15: ...rom the Holder lamp assembly 7 Reverse the above steps for reassembly REF NO PART CODE PART NAME DESCRIPTION Q TY REMARK 1 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 1 2 3512520500 GUIDE AIR OUTLET SA1...

Page 16: ...miraclon7 from the Cover heater t8 7 Reverse the above steps for reassembly 1 2 3 4 6 7 8 5 REF NO PART CODE PART NAME DESCRIPTION Q TY REMARK 1 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 1 2 351252050...

Page 17: ...O PART CODE PART NAME DESCRIPTION Q TY REMARK 1 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 1 2 3511407300 COVER MOTOR B SA1D 80 T0 5 1 3 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 2 4 3511407400 COVER B...

Page 18: ...eater U assembly 4 Remove a screw5 5 Pull out the Heater U4 from the Cover heater U2 6 Reverse the above steps for reassembly CUTTING 6EA REF NO PART CODE PART NAME DESCRIPTION Q TY REMARK 1 711240101...

Page 19: ...switch When the door is closed the hook pushes the lock lever downward The lock lever presses the button of the interlock monitor switch to bring it under OFF condition and presses the button of the s...

Page 20: ...n 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 secondar...

Page 21: ...just 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 Ch...

Page 22: ...er leads to magnetron terminal and magnetron body Continuity Defective magnetron 2 Check resistance of primary and secondary coil of high voltage transformer Defective high voltage transformer Replace...

Page 23: ...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 conti...

Page 24: ...ub assembly Display does not show programming at all even if keyboard is touched TROUBLE 7 The following visual conditions inditions indicate a probable defective touch control Circuit or button P C B...

Page 25: ...tinuity of thermistor resistance of thermistor Replace RESULT 0 or infinite Replace ERROR 2 ERROR 3 come on display Check continuity of heater convection upper lower Defective touch control circuit Re...

Page 26: ...ssel the load is immediately placed 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 foll...

Page 27: ...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 see...

Page 28: ...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 500V dc or higher voltage batteri...

Page 29: ...ODE COMBI 4 COMBI 5 CONVECTION100 130 CONVECTION140 150 CONVECTION160 250 ONE CAKE BREAD TOUCH CRUSTY ROAST BEEF ROAST CHICKEN ROAST PORK BAKED FISH AUTO BAKED POTATO MODE ROAST POTATO FRESH VEGETABLE...

Page 30: ...29 10 WIRING DIAGRAM KOC 1B4K0S 1B4K0S10 1B4K0S 20 1B4K5S 1B4K5S10...

Page 31: ...30 KOC 1B4K0S01 1B4K0S31 1B4K9SA1...

Page 32: ...31 11 EXPLODED VIEW AND PARTS LIST 11 1 DOOR ASSEMBLY Refer to 6 Disassembly and assembly 11 2 CONTROL PANEL ASSEMBLY Refer to 6 Disassembly and assembly 11 3 TOTAL ASSEMBLY...

Page 33: ...PACITOR HV 2100VAC 1 10UF 187 1 3518303500 2300VAC 1 10UF 187 KOC 1B4K5S OMEGA F10 3518400400 DIODE HV HVR 1X 3AB 12KV 187 1 F11 3513003200 HOLDER HV CAPAITOR SECC T0 6 1 F12 7272400811 SCREW TAPTITE...

Page 34: ...MACHINE PAN 4X8 SW MFZN 2 F43 3511800900 FAN PBT 1 F44 7112401011 SCREW TAPPING T1 TRS 4X10MFZN 1 F45 3512803800 HEATER MIRACLON 115V 550W 270MM 2 F46 3512766900 HARNESS CONVECTION B KOC 1B0K0S 1 F47...

Page 35: ...HARNESS HEATER KOC 1B0K0S 1 F74 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 1 F75 3514801400 SENSOR TEMPERATURE PTM K312 1 F76 3517207300 TRAY RACK AS KOC 1B0KOS 120MM 1 F77 3517207310 TRAY RACK AS KOC...

Page 36: ...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 7 8 9 9 10...

Page 37: ...ble motor does not rotate but cook indicator in display comes on Cause RELAY 1 does not operate Check method 3 When touching M W button oven lamp turns on and fan motor does not rotate but cook indica...

Page 38: ...tor and turntable motor rotate and cook indicator in display comes on Cause RELAY 7 does not operate 6 Case of no heating of convection grill When touching CONVECTION button oven lamp turns on and Fan...

Page 39: ...ned during operation the count down timer does not stop Check method POINT STATE DOOR OPEN DOOR CLOSED A OPEN CLOSE B 5V DC GND B A CHECK NO METHOD REMEDY 1 Check the stage ON OFF of the door open Rep...

Page 40: ...39 13 P C B CIRCUIT DIAGRAM...

Page 41: ...8 DIODE ZENER ZD5 UZ 3 9BSB DZUZ3R9BSB 1 19 DIODE ZENER ZD2 UZ 5 6BSB DZUZ5R6BSB 1 20 DIODE ZENER ZD4 UZ 13BSA DZUZ13BSA 1 21 DIODE ZENER ZD3 UZ 24BSB DZUZ24BSB 1 22 DIGITRON DP1 HNM 07MS12 DHNM07MS12...

Page 42: ...J9 J16 1 0 52 TIN COATING 85801052GY 4 52 WIRE COPPER 7 5mm J10 J15 1 0 52 TIN COATING 85801052GY 6 53 WIRE COPPER 7 5mm SJ5 1 0 52 TIN COATING 85801052GY 1 KOC 1B4K0S01 1B4K0S31 1B4K9SA1 54 WIRE COP...

Page 43: ...S M NO OC1B4K0001 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 Dec 2005...

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