Daewoo KOG-37DP0S, Service Manual

Page 1: ...Service Manual Microwave Oven Model KOG 37DP0S KOG 37FP0S DAEWOO ELECTRONICS CO LTD S M No G37DP0S001 ...

Page 2: ...itor 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 e A microwave leakage check to verify compliance with the Federal Performance Standard should be performed on each oven prior to release to the owner TABLE OF CONTENTS SAFETY AND PRECAUTIONS 2 1 FOR SAFE OPERATION 2 ...

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 ...

Page 4: ...ELECTIONS 4 LEVELS CAVITY VOLUME 0 7 Cu Ft MODEL KOG 37FP0S POWER SUPPLY 230V 50Hz SINGLE PHASE WITH EARTHING POWER MICROWAVE 1200W CONSUMPTION GRILL 1050W COMBINATION 2200W MICROWAVE ENERGY OUTPUT 800W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS W X H X D 465x279x346mm 18 3x11 0x13 6 in CAVITY DIMENSIONS W X H X D 290x220x306mm 11 4x8 7x12 0 in NET WEIGHT APPROX 14Kg 30 9 lbs TIMER 59 min 90 s...

Page 5: ...4 1 OUTER DIMENSION 1 KOG 37DP0S 2 KOG 37FP0S EXTERNAL VIEWS ...

Page 6: ...n the center of the ovens cavity floor This 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 gkass 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 ...

Page 7: ...sed to cook or reheat three foods by setting the weight 15 Auto weight Defrost Used to defrost two foods by setting the weight 16 Weight set pads Used to set the weight 17 M W Used to set microwave power level 18 Grill Used to cook grill 19 Combination Used to cook combination 20 Kitchen Timer Used to set a minute timer 21 Clock Used to set clock 22 Time set pads Used to set the cooking time and t...

Page 8: ...ch if damaged must be repaired with cable of same type Such a cable 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...

Page 9: ...e touch the STOP CLEAR pad once more If the oven door is opened during 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 not completely closed or the program has not been set 12 When using the GRILL or COMBI mode Do not open the doo...

Page 10: ... 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 insulted screw driver to discharge 4 When the 15A fuse is blown out due to the operation of the monitor s...

Page 11: ...kward 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 12: ...03880 FRAME DOOR PP SI83C 1 KOG 37DP 3512205200 FRAME DOOR PP SI83C 1 KOG 37FP A02 3517007300 BARRIER SCREEN 0 PET T0 125 1 A03 3515204100 STOPPER SINGE T AS KOR 63150S 1 A04 3511706100 DOOR PAINTING AS KOR 61150S 1 A05 3517002800 BARRIER SCREEN I T0 1 1 A06 3512300200 GASKET DOOR PP 1 A07 3513100700 HOOK POM 1 A08 3515101300 SPRING HOOK PW 1 1 ...

Page 13: ...crews on stopper hinge under and then push the door to contact the door seal to oven front surface Tighten two screws 1 Remove the gasket door from door painting assembly 2 Remove the door frame from door painting assembly 3 Remove the stopper hinge top from door painting assembly 4 Remove the spring and the hook 5 Remove the barrier screen outer from door frame 6 Reverse the above steps for reass...

Page 14: ...se the above steps for reassembly REF NO PART CODE PART NAME DESCRIPTION Q TY REMARK B01 3518521670 SWITCH MEMBREANE KOG 37DP0S 1 KOG 37DP 3518520970 SWITCH MEMBRANE KOG 37FP0S 1 KOG 37FP B02 3516725300 CONTROL PANEL ABS SG 0760D SG 175 1 KOG 37DP 3516725350 CONTROL PANEL ABS SG 0760D SG 175 1 KOG 37FP B03 3514322470 PCB AS KOG 57GP0S 1 B04 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 3 B05 35137027...

Page 15: ... cm2 for a fully assembled oven with door normally closed 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 Remove a screw which secure the magnetron 2 Remove the magnetron ...

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 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 17: ...base plate 4 Remove 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 ...

Page 18: ...ON QTY REMARK C01 7392500008 NUT HEX 6N 2 5 SUS 1 C02 3515000600 SPACER INSULATOR I C3771BD 2 C03 3513301100 INSULATOR HEATER SPP T0 8 1 C04 3512803400 HEATER 230V 1000W 1R67994001 1 C05 7002500613 SCREW MACHINE TRS 5X6 MFCR 1 C06 7002400413 SCREW MACHINE TRS 4X4 MFCR 2 ...

Page 19: ...d 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 completely one mounting screw INTER...

Page 20: ...e terminals and power cord before check the parts listed below CONDITION CHECK Check continuty of interlock monitor switch with door closed COM NC Check continuity of both primary and secondary interlock switch with door colosed Malfunction of interlock monitor switch Malfunction of interlock switch RESULT Continuity No Continuity CAUSE REMEDY Replace NOTE 1 Fuse blows Replace NOTE 1 Shorted conta...

Page 21: ...o Continuity Adjust or replace Check D C voltage being supplied to RELAY RY2 coil Defective touch control circuit 0 V Replace Faulty contacts of RELAY RY2 or open relay coil Approx 15 VDC Replace Check continuity of noise filter board Defective line filter board No Continuity Replace Check continuity of power supply cord Open power supply cord No Continuity Replace Defective touch control circuit ...

Page 22: ...ads to magnetron terminal and magnetron body Continuity Defective magnetron Replace Check resistance of primary and secondary coil of high voltage transformer 0 Ω or Defective high voltage transformer Replace Check continuity of magnetron with wires removed No Continuity Defective magnetron Replace Check continuity of filament terminal of high voltage transformer No Continuity Defective high volta...

Page 23: ...bviously jumps in time while counting down 9 Display counts down noticeable 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 NOTE Before following the particular steps listed above in the trouble shoot...

Page 24: ...mmediately 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 selected so that the maxim...

Page 25: ...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 26: ...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 an infinite resistance may be read in both directions A normal diode s resistance will be infinite in one direction and severa...

Page 27: ...26 WIRING DIAGRAM ...

Page 28: ... changes in proportion to fluctuation of power source voltage 3 The allowable tolerance of the secondary voltage is within 5 of nominal voltage NOTE Each measure point must be measured with GND points Terminal Voltage 6 4 7 LOAD AC 12 6 V NO LOAD AC 14 7 V NO MEASURE POINT WAVE FORM REMEDY REMARK 1 MP1 DC 5V 0 25V Replace VL1 EC1 NO LOAD 2 MP2 DC 12V 0 2V Replace EC2 D6 8 9 NO LOAD NO CHECK POINT ...

Page 29: ...28 Mesurement point MP1 MP2 ...

Page 30: ...r switch switch by resistance measurement POINT WAVE FORM A 3 When there is no microwave oscillation 1 When touching START pad oven lamp does not turn on Fan motor do not rotate but cook indicator in display comes on Cause RELAY 2 does not operate refer to Circuit Diagram point 3 Check method 2 When touching START pad oven lamp turns on Fan motor and turntable rotate and cook indicator in display ...

Page 31: ...30 2 P C B CIRCUIT DIAGRAM ...

Page 32: ...4J 3 17 RESISTOR R14 1 6W 100 5 RD AZ101J 1 18 RESISTOR R12 15 20 1 6W 10K 5 RD AZ103J 3 19 RESISTOR R16 1 6W 1M 5 RD AZ105J 1 20 RESISTOR R19 1 6W 4 7K 5 RD AZ472J 1 21 RESISTOR R21 1 4W 51 5 RD 4Z510J 1 22 RESONATOR CERA CR1 CRT 4 00MS 5P4R00MTS 1 23 IC REGULATOR VL1 MC7805C 1CPMC7805C 1 24 TRANSISTOR Q1 5 KRA 110M TZRA110M 5 25 TRANSISTOR Q6 7 9 12 KRC 106M TZRC106M 6 26 TRANSISTOR Q8 KTA 1266Y...

Page 33: ...32 1 DOOR ASSEMBLY Refer to Disassembly and assembly 2 CONTROL PANEL ASSEMBLY Refer to Disassembly and assembly 3 TOTAL ASSEMBLY EXPLODED VIEW AND PARTS LIST ...

Page 34: ... 7112401011 SCREW TAPPING T1 TRS 4 10 MFZN 1 F13 7122401211 SCREW TAPPING T2S TRS 4 12 MFZN 1 F14 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 1 F15 7S627W50X1 NUT HEX NUT FLANGE M5X0 8P MFZN 1 F16 4414A25110 FUSE 250V 15A 65TS 1 4414A25100 FUSE 250V 15A MDA15 1 F17 3518606100 NOISE FILTER DWLF M13 1 F18 7121403011 SCREW TAPPING T2S PAN 4X30 MFZN 2 F19 3963513100 MOTOR SHADED POLE 230V 17W OEM 10DWC2...

Page 35: ...00 LOCK POM 1 F41 3513601600 LAMP BL 240V 25W T25 C7A H187 1 F42 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 1 F43 3966310100 MOTOR SYNCRO 220V 2 5W GM 16 24FD12 1 3966310110 MOTOR SYNCRO 220V 2 5W M2LJ49ZT52 1 F44 3518905300 THERMOSTAT OFF 75 ON 65 H 187 NB 1 F45 3513003400 HOLDER THERMOSTAT PBT 1 F46 7272400811 SCREW TAPTITE TT3 TRS 4X8 MFZN 1 F47 4078502031 BUTTON LOCKING PP HONAM A353 2 F48 3511...

Page 36: ...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 Jul 2001 ...