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Service Manual

Microwave Oven

KOG-846T

DAEWOO ELECTRONICS CO., LTD.

M/W

Lock

Auto

cook

Grill

Combi Weighf

Defrost

Time

Waff

g

Defrost

Autocook

Grill

Power

More

Less

Stop Clear

Clock

Combi

A

A

Auto Cook Menu

Ti

m

e/

We

ight

Quan

fity

1
2
3
...
»

Содержание KOG-846T

Страница 1: ...l Microwave Oven KOG 846T DAEWOO ELECTRONICS CO LTD M W Lock Auto cook Grill Combi Weighf Defrost Time Waff g Defrost Autocook Grill Power More Less Stop Clear Clock Combi A A Auto Cook Menu T i m e Weight Quanfity ...

Страница 2: ...LE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY a Do not operate or allow the oven to be operated with the door open b Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source and make repairs as 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 an...

Страница 3: ...wer More Less Stop Clear Clock Combi A A Auto Cook Menu T i m e Weight Quanfity 348 236 389 294 319 501 FIG 1 FRONT VIEW FIG 2 SIDE VIEW 4 5 IMPORTANT The wires in this mains lead coloured in accordance with the following code Green and yellow Earth Blue Neutral Brown Live As the colours of the wires in the mains lead of this appliance may not correspond with the coloured markings identifying the ...

Страница 4: ...ng ØDOOR SCREEN Allows viewing of food Microwave cannot pass through perforations in screen ŒGRILL HEATER Turns on when grill and simultaneous cooking is selected ºOVEN LAMP Automatically turns on during oven operating SAFETY INTERLOCK SYSTEM CONTROL PANEL GLASS TURN TABLE TRAY Rotates during cooking and ensure even distribution of Microwaves It can also be used as a cooking utensil OVEN FRONT PLA...

Страница 5: ...00 appears in the display window The two dots between the hour and minutes are the clock indicator light They will start to flash on and off The time of day will be displayed at all times except when the oven is operating In the oven of a power failure or if the oven is unplugged the clock will have to be reset for the proper time Once power is restored or oven is plugged in the display will show ...

Страница 6: ...ed WEIGHT DEFROST TIME DEFROST and MICROWAVE mode NOTE During the defrosting operation turn over the food after buzzer sound for completed defrosting 4 Buzzer will sound at the end of the cooking time The indicator light go off The display panel will return to the time of day The oven light will turn off and the turntable will stop turning 1 Press DEFROST button once 2 Turn the DIAL KNOB for the d...

Страница 7: ...es to 10 minutes 1 minute from 10 minutes to 99 minutes 1 Press GRILL button once 2 Turn the DIAL KNOB for the desired cooking time For example 25 minutes 3 Press button The GRILL indicator light will light 25 00 will show in the display The GRILL indicator light will start blinking 4 Buzzer will sound at the end of the cooking time The indicator light go off The display panel will return to the t...

Страница 8: ...s COMBI button display is changed 0 H L Therefore you can select power level of MICROWAVE NOTE Time can be set up to 99 minutes NOTE DISPLAY POWER LEVEL 0 500W H 600W L 400W 1 Press AUTO COOK button 2 Select the desired cooking For example SOUP Press AUTO COOK button twice 4 Turn the DIAL KNOB for desired cooking quantity 5 Select the desired cooking quantity For example 3 600g The AUTO COOK indic...

Страница 9: ... CUP 1 BEVERAGE 2 2 CUPS 3 3 CUPS 4 4 CUPS 1 200g 2 SOUP 2 400g 3 CASSEROLE 3 600g 4 800g 4 VEGETABLE I 680g 5 VEGETABLE II 450g 6 FISH FILLETS 450g MENU NO QUANTITY NO 1 700g 2 800g 3 900g 7 ROAST BEEF 4 1000g 8 ROAST PORK 5 1100g 6 1200g 7 1300g 1 700g 2 800g 3 900g 9 ROAST 4 1000g CHICKEN 5 1100g 6 1200g 7 1300g 8 1400g 9 1500g SPEEDY COOK CHILD SAFETY LOCK The safty lock prevents unwanted oven...

Страница 10: ...m monitor interlock switch and D O M switch When the door is closed the hook pushes the lever lock forward and the lever presses the button of the interlock monitor switch to bring it under OFF condition Simultaneously the lever lock presses the button on the secondary interlock switch and D O M switch to bring it under ON condition Adjustment 2 Interlock monitor switch When the door is closed the...

Страница 11: ...short the capacitor terminals and make sure of discharge 1 Check the earthing Do not operate on a 2 wire extension cord The microwave oven is designed to be used when earthed It is imperative therefore to makes sure it is earthed properly before begining repair work 2 Warning about the electric charge in the high voltage capacitor Refer to Fig 1 For about 30 seconds after the operation stops elect...

Страница 12: ...three screws which secure the magnetron 4 Remove the magnetron 5 Reverse the above steps for reassembly CAUTION Never install the magnetron without the 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 H V...

Страница 13: ...21301011 SCREW TAPPING T2 PAN 3X10 PW MFZN 9 B10 3511601300 DECORATOR KNOB ABS 1 GOLD COLOR 3511601310 DECORATOR KNOB ABS 1 B11 3513402000 KNOB VOLUME ABS 1 B12 3516902800 BUTTON START I ABS 1 B13 3516902900 BUTTON START 0 ABS 1 MILKY B14 3511403900 COVER LED SAN 1 7 To remove door assembly Refer to Fig 9 1 Remove two bolts and two nuts which secure to hinge 2 Remove door assembly 3 Remove door ab...

Страница 14: ...t Quanfity A D B C NOTE Small gap may be acceptable if the microwave leakage does not exceed 1mW cm2 NOTE The door on a microwave oven is designed to act as an electronic seal preventing the leakage of microwave energy from the oven cavity during the cook cycle This function does not require that the door be air tight moisture condensation tight or light tight Therefore the occasional appearance o...

Страница 15: ...y of primary winding of low voltage transformer 0 Ω or infinite Approx 150 210 normal Defective low voltage transformer Disconnect high voltage fuse and operate the unit Fuse again blows Defective high voltage transformer Malfunction of interlock monitor switch Replace Replace Replace Replace Replace Check Result Cause Remedy COM ŒNC COM ŒNC Note 1 Note 1 Note 1 F9 F10 F9 F10 11 To remove grill he...

Страница 16: ... coil Check continuity of magnetron heater with wires removed No Continuity No Continuity 0V Approx 16V DC Defective magnetron Check continuity of filament terminal of high voltage transformer Check D C voltage being supplied to RELAY RY1 coil Continuity Defective high voltage transformer Replace Replace Replace Replace Replace Replace Replace Replace Check Result Cause Remedy Condition Grill heat...

Страница 17: ...r different from one setted For example when 5 setted 3 appears in the display 5 Specific numbers for example 2 or 3 do not display when the dial knob is rotated 6 Display does not count down or up with time cooking or clock operation 7 oven is programmable and cooks normally but no display shows 8 Display obviously jumps in time while counting down 9 Display counts down noticeably too fast while ...

Страница 18: ... pin 3 Read the value of resistance between the lead wire connector and the power supply neutral plug pin when the oven door is opened and when the oven door is closed P 4187 T t Water Load Tray Fig 14 CAUTION 1 Water load should be measured exactly to 1 litre 2 Input power voltage should be exactly volts as specified 3 Ambient temperature should be 20 2 C NOTE Remove the power plug from the wall ...

Страница 19: ...The high voltage diode is located on the base near the transformer A Isolate the diode from the circuit by disconnecting the leads B With the ohmmeter 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 to back resistance ...

Страница 20: ...39 38 SCHEMATIC DIAGRAMS IDLE M W GRILL COMBI ...

Страница 21: ...41 SCHEMATIC DIAGRAMS GERMANY ONLY 40 WIRING DIAGRAM GERMANY ONLY IDLE M W ...

Страница 22: ...18103500 TRANS HV DW N90S0 84T 1 3518103510 TRANS HV JY N90S0 84T 1 SUB F22 7S327W50B1 SCREW TAPPING T2 FLANGE 5X12 MFZN 4 F23 3518002400 MAGNETRON 2M218J MF I 1 F24 7S312X4081 SCREW TAPPING T1 TRS 4X8 SE MFZN 3 F25 3518903000 THERMOSTAT NT 101 H038 140 125 187 1 F26 7279300611 SCREW TAPPTITE TT3 BRS 3X6 MFZN 2 F27 3513804700 LOCK POM 1 F28 3513702100 LEVER SW MICRO POM 1 F29 4415A17352 SW MICRO V...

Страница 23: ...43 EXPLODED VIEW ...

Страница 24: ...900 OEM 15DWC2 A02 SUB F44 7124402511 SCREW TAPPING T2S RND 4X25 MFZN 2 F45 3511800100 FAN P P G F 1 F46 4416W67820 CAPACITOR H V 2100V AC 1 1µF 1 F47 3513001000 HOLDER CAPACITOR SECC 0 6T 1 F48 7S422X4081 SCREW SPECIAL TT2 TRS 4X8 SE MFZN 1 F49 4416V24000 DIODE HV HVR 1X 32B D5 3 1 F50 7S422X4081 SCREW SPECIAL TT2 TRS 4X8 SE MFZN 1 F51 3518700210 FUSE HV 5KV 0 7A THV 060T 1 OPTION F52 3518602700 ...

Страница 25: ... display filament The Display has some troubles in its segment or grid Loss of vacuum in the display 1 Check the voltage of PIN 1 PIN 25 Refer to The display trouble shooting data below 2 6 VAC White spot is generated on the display Fix the PIN 1 25 on the P C B Replace P C B assembly Replace P C B assembly TROUBLE TIME DEFROST g do not come on WEIGHT DEFROST WATT do not come on COMBI does not com...

Страница 26: ... oeprate properly If clock does not keep exact time you must check Diode D6 transistor Q2 BL BL CN1 EARTH TERMINAL D O M S W A 1 2 3 5V R10 C8 R11 B 5V 40 MICOM 4 5 D12 D13 D10 D11 C15 D15 R1 R2 R9 Q2 C9 44 5V C7 A B C MICOM POINT A B STAGE 1 DOOR OPENED OPEN 5VDC 2 DOOR CLOSED CLOSED GND CHECK NO METHOD REMEDY 1 Check the state ON OFF of the secondary Replace secondary Interlock switch by resista...

Страница 27: ...DESCRIPTION REMARK R4 5 12 13 RD 4Z102J R CARBON FILM 1 4W 1KΩ J R28 34 41 RD 4Z102J R CARBON FILM 1 4W 1KΩ J R27 RD 4Z101J R CARBON FILM 1 4W 100Ω J R35 RD 4Z103J R CARBON FILM 1 4W 10KΩ J R9 10 RD 4Z472J R CARBON FILM 1 4W 4 7KΩ J R1 11 RD 4Z104J R CARBON FILM 1 4W 100KΩ J R37 RD 4Z202J R CARBON FILM 1 4W 2KΩ J R42 43 RD 4Z150J R CARBON FILM 1 4W 15KΩ J R30 33 RD 4Z510J R CARBON FILM 1 4W 51Ω J ...

Страница 28: ...O G846T0S001 DAEWOO ELECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC FAX 02 364 5588 5305 TEX 02 360 7114 7315 7 PRINTED DATE FEB 1996 ...

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