Daewoo KOG-372G0S Service Manual Download

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Service Manual

Microwave Oven

Model: KOG-372G0S

DAEWOO ELECTRONICS CO., LTD.

KOG-372H0S
KOG-392G0S
KOG-392H0S

S/M No. : G372GH0S02

✔

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 KOG-372G0S

Page 1: ... KOG 392G0S KOG 392H0S S M No G372GH0S02 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: ...ating 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 and latches 5 Evidence of dropping or abuse c Before turning on power to the microwave oven for any service test or inspection within the microwave generating compartments check the magnet...

Page 3: ...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 the owner c attempt to ascertain the cause of the excessive leakage d 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: ...E ENERGY OUTPUT 800W 900W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS W X H X D 465 x 279 x 360mm 18 3 x 11 0 x 14 2 in 495 x 294 x 388mm 19 5 x 11 6 x 15 3 in CAVITY DIMENSIONS W X H X D 290 x 220 x 306 m m 11 4 x 8 7 x 12 0 in 320 x 244 x 338mm 12 6 x 9 6 x 13 3 in NET WEIGHT APPROX 13 7Kg 30 2lbs APPROX 15 8Kg 34 9lbs TIMER 59 min 90 sec FUNCTION SELECTIONS MICROWAVE POWER SELECTIONS 10 LEVE...

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

Page 6: ...is to remain in the oven for all cooking 9 ROLLER GUIDE This must always be used for cooking together with the glass cooking tray 10 GLASS COOKING TRAY Made of special heat resistant glass Food in a proper receptacle is placed on this tray for cooking 11 DOOR VIEWING SCREEN Allows viewing of food The screen is designed so that light can pass through but not the microwave 12 DOOR HOOK When the door...

Page 7: ...sed to remove time from cooking 7 AUTO DEFROST Used to defrost foods for weight 8 COMBI Used to cook COMBI 9 GRILL Used to cook GRILL 10 POWER Used to set power level 11 DEFROST Used to defrost foods for time 12 KITCHEN TIMER Used as a minute timer to delay the start of cooking or to set a holding time after cooking 13 CLOCK Used to set clock 14 STOP CLEAR Used to stop the oven operation or to del...

Page 8: ...cooking 6 AUTO DEFROST Used to defrost foods for weight 7 COMBI Used to cook COMBI 8 GRILL Used to cook GRILL 9 POWER Used to set power level 10 DEFROST Used to defrost foods for time 11 KITCHEN TIMER Used as a minute timer to delay the start of cooking or to set a holding time after cooking 12 CLOCK Used to set clock 13 STOP CLEAR Used to stop the oven operation or to delete the cooking data 14 S...

Page 9: ... 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 it is colder than room temperature T...

Page 10: ...uring the oven operation all information is retained 11 If the START pad is touched and the oven does not operate check the area between the door and door is closed securely The oven will not start cooking under the door is completely closed or the program has been reset 12 When using the GRILL or COMBI mode Do not open the door so often the temperature inside the oven decrease and the cooking may...

Page 11: ...epair 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 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 due to ...

Page 12: ...cabinet backward 2 To remove door assembly 1 Remove a screw 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 assembly perform a check of correct alignment with the hinge and cavity front plate ...

Page 13: ...T CODE PART NAME DESCRIPTION QTY REMARK A01 3517005760 BARRIER SCREEN O SAN T1 5 1 A02 3512204120 FRAME DOOR ABS SG 175 SG 1760D 1 A03 2TE20008CL DOUBLE TAPE 0 2TX8MM CLEAR 0 5ME A04 3515204100 STOPPER HINGE T AS KOR 63150S 1 A05 3511711900 DOOR WELD AS KOR 866T1S 1 A06 3517006000 BARRIER SCREEN I POLYESTER T0 1 1 A07 3512302000 GASKET DOOR PP 1 A08 3513100730 HOOK POM 1 A09 3515101320 SPRING HOOK...

Page 14: ...ove 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 a screw on stopper hinge top and then push the door to contact the door seal to oven front surface Tighten a screw 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 surfac...

Page 15: ... QTY REMARK B01 3518521750 SWITCH MEMBRANE KOG 392G0S 1 3518521760 KOG 392H0S B02 3516720230 CONTROL PANEL ABS SG175 SG 0760D 1 B03 PKMPMSBW00 PCB MAIN AS KOG 390A0S 1 B04 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 4 CONTROL PANEL ASSEMBLY KOG 372G0S PKCPSWBX00 KOG 372H0S PKCPSWBY00 KOG 392G0S PKCPSWBZ00 KOG 392H0S PKCPSWB100 B01 B02 B03 B04 Caution In this Service Manual some parts can be changed...

Page 16: ... 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 secure the magnetron 2 Remove the magnetron 3 Reverse the above steps for reassembly NOTE Never install the magnetron without the metallic gasket plate which i...

Page 17: ... wind guide 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 reassembly 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 18: ...move the tray motor cover 5 Remove a screw which secure the tray motor 6 Remove the tray motor 7 Reverse the above steps for reassembly except for securing the tray motor cover with screw 11 To remove heater assembly 1 Remove the three nuts 2 Remove the insulator heater assembly 3 Reverse the above steps for reassembly DISASSEMBLY AND ASSEMBLY ...

Page 19: ... 3512803410 HEATER 230V 1000W 1S0PE47501 1 C05 7002500613 SCREW MACHINE TRS 5X6 MFCR 1 C06 7002400413 SCREW MACHINE TRS 4X4 MFCR 1 DISASSEMBLY AND ASSEMBLY Caution In this Service 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 dw...

Page 20: ...k pushes the lock lever downward The lock lever presses the button of the interlock monitor switch to bring it under NO condition and presses the button of the secondary interlock switch to bring it under ON condition 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 Tighten comp...

Page 21: ...ls and power cord before check the parts listed below CHECK RESULT CAUSE REMEDY Fuse blows Continuity No Continuity Continuity 0 infinite Ω or Approx 150 310 normal Replace NOTE 1 Replace NOTE 1 Replace Replace Check continuity of primary winding of low voltage transformer Malfunction of interlock monitor switch Defective low voltage transformer Check continuity of interlock monitor switch with do...

Page 22: ... filter board No Continuity Defective line filter board Replace NOTE All these switches must be replaced at the same time please refer to Interlock Mechanism And Adjustment CONDITION CHECK RESULT CAUSE REMEDY Turn table motor and oven lamp do not turn on No Continuity Adjust or replace Adjust or replace Replace Replace Malfunction of primary interlock switch No Continuity 0 V Approx 15 VDC Check c...

Page 23: ...elay coil REMEDY Replace Replace Replace Replace Replace Replace Replace Replace No m icrowave oscillation Check continuity of high voltage rectifier in forward and backward direction with DC megger Check continuity of high voltage capacitor terminals with wires rem oved Connect megger leads to magnetron terminal and magnetron body Check resistance of primary and secondary coil of high voltage tra...

Page 24: ...ly jumps in time while counting down 9 Display counts down noticeably too fast while cooking 10 Display does not show the time of day when clear pad is touched 11 Oven lamp and turntable motor do not stop although cooking is finished Check if the RELAY 2 contacts close if they are close replace touch control circuit CONDITION CHECK RESULT CAUSE REMEDY Display does not show programming at all even ...

Page 25: ...essel 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 following Heating time is measured while the microwave generator is operating at full power The filament heat up time for magnetron is not included 6 The initial and final temperature of water is selecte...

Page 26: ...he door cabinet 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 clo...

Page 27: ...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 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 an...

Page 28: ... WIRING DIAGRAM ...

Page 29: ...1 IC1 PIN 2 21 30 34 5VDC 2 IC1 PIN 35 T 20ms 50Hz 3 IC1 PIN 31 OR 32 T 250 ns 4MHz NO MEASURE POINT WAVE FORM REMEDY REMARK 1 MP1 DC 5V 0 25V Replace VL1 EC1 NO LOAD 2 MP2 DC 12V 2 0V Replace EC2 D12 13 14 NO LOAD NOTE 1 Refer to Circuit Diagram point 4 2 Secondary side voltage of the low voltage transformer changes in proportion to fluctuation of power source voltage 3 The allowable tolerance of...

Page 30: ... PRINTED CIRCUIT BOARD MP1 MP2 Measure Point ...

Page 31: ...ircuit Diagram point 6 Check method 5 When the door is opened during operation the count down timer does not stop refer to Circuit Diagram Point 1 Check method 6 When the digital clock does not operate properly refer to Circuit Diagram Point 5 If clock does not keep exact time you must check resistor R15 16 zener diodeZD1 POINT STATE A B RELAY 2 ON 5VDC GND RELAY 2 OFF GND 12VDC POINT STATE A B RE...

Page 32: ... PRINTED CIRCUIT BOARD 2 P C B CIRCUIT DIAGRAM ...

Page 33: ...7 RESISTOR R11 20 21 1 6W 100K 5 RD AZ104J 3 18 RESISTOR R13 1 6W 100 5 RD AZ101J 1 19 RESISTOR R15 17 1 6W 10K 5 RD AZ103J 3 20 RESISTOR R18 1 6W 1M 5 RD AZ105J 1 21 RESISTOR R19 1 4W 51 5 RD 4Z510J 1 22 REGULATOR VL1 MC7905C 1MC7905C 1 23 TRANSISTOR Q1 5 8 11 KRA 102M TZRA102M 9 24 TRANSISTOR Q6 KTA 1270Y TZTA1270Y 1 25 TRANS POW ER LVT1 DMR 631FS 5EPV035303 1 26 W IRE COPPER J1 J21 1 0 52 TIN C...

Page 34: ...D AZ104J 3 18 RESISTOR R13 1 6W 100 5 RD AZ101J 1 19 RESISTOR R15 17 1 6W 10K 5 RD AZ103J 3 20 RESISTOR R18 1 6W 1M 5 RD AZ105J 1 21 RESISTOR R19 1 4W 51 5 RD 4Z510J 1 22 REGULATOR VL1 MC7905C 1MC7905C 1 23 TRANSISTOR Q1 5 8 11 KRA 102M TZRA102M 9 24 TRANSISTOR Q6 KTA 1270Y TZTA1270Y 1 25 TRANS POW ER LVT1 DMR 631FS 5EPV035303 1 26 W IRE COPPER J1 J21 1 0 52 TIN COATING 85801052GY 21 27 W IRE COPP...

Page 35: ...Disassembly and assembly 2 CONTROL PANEL ASSEMBLY Refer to Disassembly and assembly 3 TOTAL ASSEMBLY F15 F16 F17 F18 F19 F20 F21 F22 F23 F24 F25 F26 F27 F28 F29 F30 F31 F32 F33 F34 F37 F38 F39 F40 F41 F42 F39 1 F43 F44 F45 F46 F47 F48 F49 F51 F50 F52 F53 F54 ...

Page 36: ...ING T1 TRS 4 10 MFZN O F13 7122401211 SCREW TAPPING T2S TRS 4 12 MFZN O F14 7S627W50X1 NUT HEX NUT FL M5X0 8P MFZN O F15 4414A25110 FUSE 250V 15A 65TS O 4414A25100 250V 15A MDA F16 3518606100 NOISE FILTER DWLF M13 O F17 7124402511 SCREW TAPPING T2S RND 4X25 MFZN O F18 3963513100 MOTOR SHADED POLE 230V 17W OEM 10DWC2 A07 O 3963512310 230V 20W MW10CA M02 F19 3512517000 GUIDE WIND PP O F20 3511800300...

Page 37: ...J49ZT52 F45 3518905300 THERMOSTAT OFF 75 ON 65 H 187 NB O F46 3513003400 HOLDER THERMOSTAT PBT O F47 7272400811 TAPTITE SCREW TT3 TRS 4X8 MFZN O F48 4078502031 BUTTON LOCKING PP HONAM A353 O F49 3511405100 COVER WAVE GUIDE MICA T0 5 O F50 3517400620 COUPLER XAREC O F51 3514700710 ROLLER TEFLON X KOG 372 S 3514700900 KOG 392 S F52 3512517300 GUIDE ROLLER PP 5113MF6 A353B X KOG 372 S 3512517500 GUID...

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