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Service Manual

Microwave Oven

Model:  KOR-631Q2A

DAEWOO ELECTRONICS CO., LTD.

S/M No. : 

R631Q2A001

✔ 

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 KOR-631Q2A

Page 1: ...CO LTD S M No R631Q2A001 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: ...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 e A microwave leakage check to verify compliance with the Federal performance standard should be per formed on each oven prior to release to the owner TABLE OF CONTENTS SAFETY AND PRECAUTIONS 2 FO...

Page 3: ...cing the oven 2 If any 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 o...

Page 4: ... MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS W X H X D 465x279x360 mm 18 3x11 0x14 2 in CAVITY DIMENSIONS W X H X D 290x211x306 mm 11 4x8 3x12 0 in NET WEIGHT Approx 12 kg 26 5 Ibs TIMER 59 min 99 sec FUNCTION SELECTIONS MICROWAVE POWER SELECTIONS 10 LEVELS CAVITY VOLUME 0 7 Cu Ft SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE SPECIFICATIONS ...

Page 5: ...4 EXTERNAL VIEW 1 OUTER DIMENSION 465 360 279 279 294 ...

Page 6: ... microwave outlet from splashes of cooking foods 5 5 OVEN LAMP Automatically turns on during oven operating 6 6 SAFETY INTERLOCK SYSTEM 7 7 CONTROL PANEL 8 8 GLASS COOKING TRAY Made of special heat resistant glass The tray must always be in proper position before operating Do not cook food directly on the tray 9 9 OVEN FRONT PLATE 0 0 DOOR OPENING BUTTON To open the door push the door opening butt...

Page 7: ...isplayed 2 2 ONE TOUCH Used to cook or reheat specific quantities of food 3 3 SPEEDY COOK Touch to set the desired reheat time 4 4 TIME SET PAD Used to set the cooking time and the present time 5 5 AUTO DEFROST Used to defrost foods 6 6 POWER Used to set power level 7 7 CLOCK AUTO START Used to set clock and also used to set a delayed auto start 8 8 STOP CLEAR Used to stop the oven operation or to...

Page 8: ...f approximately 15 amperes 120Volts 60Hz grounded outlet Power supply cord is about 0 8 meters long 1 A short power supply cord is provided to reduce the risks resulting from becoming entangled in or tripping over a longer cord 2 Longer cord sets or extension cords are available and may be used if care is exercised in their use 3 If a long cord or extension cord is used 1 The marked electrical rat...

Page 9: ...king time ends 10 When the STOP CLEAR pad is touched during the oven operatiion the oven stops cooking and all information retained To erase all information except the present time 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 i...

Page 10: ...ing 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 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 du...

Page 11: ...ward 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 assembly perform a check of correct alignment with the hinge and cavity front plate ...

Page 12: ...OR 63150S 1 A05 3511705500 DOOR WELD AS KOR 61150S 1 A06 3517002800 BARRIER SCREEN I POLYESTER T0 1 1 A07 3512300200 GASKET DOOR PP 1 A08 3513100740 HOOK POM 1 A09 3515101300 SPRING HOOK PW1 1 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 S...

Page 13: ... the door to contact the door seal to oven front surface Tighten two screws 1 Remove the gasket door from door weld as 2 Remove the barrier screen inner from door weld as 3 Remove the door frame from door weld as 4 Remove the stopper hinge top from door weld as 5 Remove the spring and the hook 6 Remove the supporter barrier screen outer from door frame 7 Remove the barrier screen outer from door f...

Page 14: ...01211 SCREW TAPPING T2S TRS 4X12 MFZN 3 B05 3513702700 LEVER DOOR OPEN PP 1 B06 441G430171 SPRING BUTTON SWP DIA0 7 1 B07 3516906900 BUTTON DOOR OPEN ABS SG 076D SG 175 1 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 Cen...

Page 15: ...acked with each magnetron to pre vent 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 1 Remove the screw which secure the control panel push up two snap fits and draw forward the control panel assembly 2 Remove the door open lever from the control panel 3 Remove four scre...

Page 16: ... assembly 3 Pull the fan from the motor shaft 4 Remove two screws which secure the motor shaded pole 5 Remove the motor shaded pole 6 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: ...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 secondary interlock switch to bring it under ON condition 3 Adjustment steps a Loosen the mounting screw b Adjust interlock switch assembly position c Make sure that lock lever moves smoothly after adjustment is completed ...

Page 18: ...ed of the terminals and power cord before check the parts listed below CONDITION CHECK Check continuity of interlock monitor switch with door closed Check continuity of of primary interlock switch contact with door partially open until interlock moni tor switch contact close Malfunction of interlock moni tor switch Shorted con tacts of primary interlock switch RESULT Continuity No Continuity Repla...

Page 19: ...ity Adjust or replace Check D C voltage being sup plied to RELAY RY2 coil Defective touch control circuit 0 V Replace Faulty contacts of RELAY RY2 or open relay coil Approx 26 VDC Replace Display do not shown countdown Malfunction of sec ondary interlock switch Replace Check continuity of power supply cord Open power sup ply cord No Continuity Replace Defective touch control circuit Normal Replace...

Page 20: ...place Connect megger leads to mag netron terminal and magnetron body Continuity Defective mag netron Replace Check resistance of primary and secondary coil of high voltage transformer 0 Ω or Defective high voltage trans former Replace Check continuity of magnetron with wires removed No Continuity Defective mag netron Replace Check continuity of filament termi nal of high voltage transformer No Con...

Page 21: ...n 9 Display counts down noticeably too fast while cooking 10 Display does not show the time of day when the STOP 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 LOCK NO CUP oz lb 1 2 WEIGHT TIME START DEF AUTO STAGE NOTE Before following the particular steps listed abo...

Page 22: ...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 23: ...inet 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 2 ...

Page 24: ...th 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 A normal diode s resistance will be infinite in one direction and several hundre...

Page 25: ...24 WIRING DIAGRAM ...

Page 26: ...h measure point must be measured with GND points 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 the secondary voltage is within 5 of nominal voltage Terminal Voltage 6 7 LOAD AC 25 3 V NO LOAD AC 26 9 V NO MEASURE POINT WAVE FORM REMEDY REMARK 1 MP1 DC 5V 0 25V...

Page 27: ...26 Measure Point ...

Page 28: ... door is opened during operation the count down timer does not stop refer to Circuit Diagram Point 1 Check method 5 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 R21 R34 C2 STATE POINT A B RELAY 1 ON 5 VDC GND RELAY 1 OFF GND 24 VDC STATE POINT A B C RELAY 2 ON 2 5 VDC 23 3 VDC 24 VDC RELAY 2 OFF GND 29 V...

Page 29: ...14 R11 R13 9 11 10 13 12 14 1 2 3 4 5 6 7 8 9 10 11 16 12 13 15 14 IC2 RA1 D1 Q2 R5 R7 R6 R10 Q3 Q4 Q5 Q6 Q7 R41 R40 D12 D13 D14 R18 R17 R16 R15 EC1 ZD2 R39 R38 R36 R37 D6 D9 D10 Q9 R28 Q12 EC3 R30 R35 R31 EC4 Q11 R33 R25 A B 1 2 3 4 5 A B A A C B 9 OSC OUT V1 V2 V1 V1 7 RESET 8 OSC IN V1 V1 22 INT 6 Vdd 20 GND V2 V1 14 12 13 10 9 8 7 6 4 3 2 42 1 5 5 11 POWER 0 6 1 8 7 2 3 9 4 V1 41 40 39 38 37 3...

Page 30: ... FILM R1 3 6 10 14 1 6W 1 2K 5 RD AZ122J 9 24 R CARBON FILM R5 7 28 30 31 42 1 6W 4 7K 5 RD AZ472J 6 25 R CARBON FILM R27 1 6W 10K 5 RD AZ103J 1 26 R CARBON FILM R19 1 6W 20K 5 RD AZ203J 1 27 R CARBON FILM R21 34 1 6W 47K 5 RD AZ473J 2 28 R CARBON FILM R26 1 4W 100K 5 RD 4Z104J 1 29 R CARBON FILM R20 1 6W 1M 5 RD AZ105J 1 30 RESONATOR CERA CR1 CRT4 00MS 5P4R00MTS 1 31 IC MICOM IC1 HD404314B73S 147...

Page 31: ...EL ASSEMBLY Refer to Disassembly and assembly 3 TOTAL ASSEMBLY EXPLODED VIEW AND PARTS LIST F23 B00 A00 F38 F39 F37 F36 F35 F34 F31 F30 F29 F28 F25 F27 F26 F24 F33 F32 F40 F41 F42 F01 F02 F03 F04 F05 F06 F07 F19 F20 F21 F22 F16 F17 F15 F14 F13 F12 F11 F10 F18 F09 F08 ...

Page 32: ... 3516003700 SPECIAL SCREW TT3 HEX 4X8 FLG MFZN 4 F21 3510311700 BASE SBHT T0 7 1 F22 7112401011 SCREW TAPPING T1 TRS 4 10 MFZN 5 F23 3512000900 FOOT PP DASF 130 2 F24 7272400811 SCREW TAPTITE TT3 TRS 4X8 MFZN 1 F25 3515201101 STOPPER HINGE U SCP 1 T2 5 1 F26 4415A17352 SW MICRO VP 533A OF SPNO 187 200G 1 F27 4415A66600 SW MICRO VP 532A OF SPNO 187 200G 1 F28 4415A17352 SW MICRO VP 533A OF SPNO 187...

Page 33: ...S M NO R631Q2A001 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 Nov 2001 ...

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