Daewoo KOR-122M0A Service Manual Download Page 30 | Manualshive

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5. To remove control panel assembly.

(1) Disconnect all the lead wires connected to

control panel assembly.

(2) Remove the screw(F35) holding the control

panel assembly.

(1) Remove the four screws (B04) from the P.C.B. ass'y (B03).
(2) Pull out the P.C.B. ass'y (B03) from the control panel (B02).
(3) Remove the door open lever (B05).
(4) Pull out the door open button (B07) and button spring (B06) from the control panel (B02).
(5) Reverse the above steps for reassembly.

F35

NOTE: Do not attempt to remove switch membrane except for replacement.

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Summary of Contents for KOR-122M0A

Page 1: ...WOOELECTRONICSCO LTD OVERSEASSERVICEDEPT 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: ...eased 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 h e f f h e f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e...

Page 3: ...en 2 If any certified oven unit is found to have excessive emission level 5mW cm2 the service person should 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 open the s...

Page 4: ...ZZA DINNER PLATE MORE LESS MENU WEIGHT Auto Cook 1 Baked Potato 2 Fresh Vegetable 3 Soup 4 Fish Fillets 5 Meat Loaf POWER SUPPLY 120V AC 60Hz SINGLE PHASE WITH GROUNDING POWER CONSUMPTION 1380W MICROWAVE OUTPUT POWER 900W IEC 705 FREQUENCY 2450 MHz OUTSIDE DIMENSIONS WxHxD 564x310x412mm 22 2x12 2x16 2 in CAVITY DIMENSIONS WxHxD 374x233x372mm 14 7x9 2x14 6 in NET WEIGHT APPROX 16 5Kg 36 4 lbs TIMER...

Page 5: ...omatically shut off 2 Door seal The door seal maintains the microwave within the oven cavity and prevents microwave leakage 3 Oven Cavity 4 Spatter shield Protects the microwave outlet from splashes of cooking foods 5 Safety interlock system Prevents the oven from operating while the door is opened 6 Door release button Pushing this button stops oven operation and opens the door 7 Glass cooking tr...

Page 6: ...nt time 11 Display Cooking time power level indicators and present time are displayed 12 SPEEDY COOK Touch to set the desired reheat time 13 One touch used d to cook or reheat specific quantities of food See pages 13 15 14 MORE Used to add time to one touch cooking 15 LESS Used to remove time from one touch cooking 16 Auto Defrost Used to defrost foods 17 Power Used to set power level 18 Clock A s...

Page 7: ...ay Cooking time power level indicators and present time are displayed 12 SPEEDY COOK Touch to set the desired reheat time 13 One touch used to cook or reheat specific quantities of food See pages 13 15 14 More Used to add time to one touch cooking 15 Less Used to remove time from one touch cooking 16 AUTO DEF Used to defrost foods 17 POWER Used to set power level 18 CLOCK A START Auto Start Used t...

Page 8: ...m or splashing liquids These things can adversely affect oven wiring and contacts 6 Power supply This microwave oven requires a power supply of approximately 20 Amperes 120 Volts 60Hz and a grounded outlet A short power cord is provided to reduce the risk of the user becoming entangled in or tripping over a longer cord Longer cord sets or extension cords are available and may be used if care is ex...

Page 9: ...y will show 0 when the oven is plugged in 6 Time clock returns to the present time when the cooking time ends 7 When the STOP CLEAR pad is touched during the oven operation 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 8 If the S...

Page 10: ... blinking and the colon starts blinking If you selected 12 hour clock system this digital clock allows you to set from 1 00 to 12 59 If you selected 24 hour clock system this digital clock allows you to set from 0 00 to 23 59 CONTROLS SETTING THE CLOCK WEIGHT DEFROSTING NOTE This oven has multiple clock system If you want 12 hour clock system omit this step step 2 e e h h h h h h e e e e e e e e e...

Page 11: ...n the cooking time ends you will hear 3 beeps The WEIGHT DEFROST indicator lights and 0 is displayed And the lb indicator starts blinking The TIME DEFROST indicator lights and 0 is displayed The display will show the numbers you pressed in the order you touched TIME DEFROSTING COOKING IN ONE STAGE NOTE Using lower power levels increases the cooking time which is recommended for foods such as chees...

Page 12: ...rozen foods to be defrosted fully before cooking This oven can be programmed to automatically defrost foods before cooking 1 Touch Auto Defrost pad 2 Touch number pads for the defrosting weight you want 3 Touch Power pad 4 Touch Power pad once more 5 Touch number pads for desired cooking time in the first stage The STAGE1 indicator lights and the display will show the numbers you pressed in the or...

Page 13: ...isplay and the cooking program indicators come on The AUTO START indicator and the colon start blinking When the selected start time arrive the oven begins operating and the oven light turns on The AUTO START indicator goes off and the next stage indicator begins to blink When the cooking is completed you will hear 3 beeps The oven turns off and the present time appears in the display The STAGE2 i...

Page 14: ... according to manufacturer s directions 3 Pop only one bag at a time 4 After popping open bag carefully popcorn and steam are extremely hot 5 Do not reheat unpopped kernels or reuse bag 6 Do not leave oven unattended while popping popcorn CAUTION If prepackaged popcorn is of a different weight then the recommended weight do not use the popcorn pad Follow the manufacturer instruction e e h h h h h ...

Page 15: ...or quantity and the oven starts cooking BEVERAGE When you touch DINNER PLATE pad once 11 is displayed After 1 5 seconds the display shows the cooking time and the oven starts cooking DINNER PLATE When you touch MUFFIN pad 5 is displayed After 1 5 seconds the display shows the cooking time and the oven starts cooking MUFFIN FROZEN PIZZA BEVERAGE 250ml cup 1 cup mug Touch BEVERAGE once 2 cups mugs T...

Page 16: ...Touch Baked Potato once 2 NO ea Touch Baked Potato twice within 1 5 seconds 3 NO ea Touch Baked Potato three times within 1 5 seconds Soup 8 oz Touch Soup once 12 oz Touch Soup twice within 1 5 seconds NOTE For best results consult the cookbook e e h h h h h h e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e...

Page 17: ...en you touch WEIGHT pad once 1 is displayed After 1 5 seconds the display changed into cooking time of quantity and the oven starts cooking MENU WEIGHT Baked Potato 5 5 oz 6 5 oz ea 1 NO ea Touch WEIGHT once 2 NO ea Touch WEIGHT twice within 1 5 seconds 3 NO ea Touch WEIGHT three times within 1 5 seconds Fresh Vegetable 8 oz Touch WEIGHT once 12 oz Touch WEIGHT twice within 1 5 seconds Soup 8 oz T...

Page 18: ...nstructions 2 Open the door You can restart the oven by closing the door and touching START CHILD SAFETY LOCK TO STOP THE OVEN WHILE THE OVEN IS OPERATING NOTE Oven stops operating when door is opened e e h h h h h h e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e...

Page 19: ...cks the oven door If the door is not closed properly the oven will not operate When the door is closed the hook pushes the button of the micro switch Then the button of the primary interlock switch bring it under on condition Adjustment 1 When the door is closed the switch button is pushed by the hook The movement of the switch button should exceed 1 2mm measured at the top of the button INTERLOCK...

Page 20: ...letely tighten the two mounting screws 4 Interlock switch resplacement Whenever safety interlock switches are replaced 1 Refer to the following diagram 2 Check the connection of monitor switch after replacement 3 Perform the electrical continuity check of interlock switches and microwave emission test mentioned in this manual Interlock monitor switch Hook Push lever Secondary interlock switch NOTE...

Page 21: ...t normal position Fig 1 4 Microwave power is switched on 5 Heating time should be exactly 47 seconds Heating time is measured while the microwave generator is operating at full power The filament heat up time for magnetrons is not included 6 The initial and final water temperatures are selected so that the maximum difference between the ambient and final water temperatures is 5K 7 The microwave po...

Page 22: ...ed below Leakage for a fully assembled oven with door normally closed must be less than 4mW cm2 When measuring the leakage always use the 5cm space cone with probe Hold the probe perpendicular to the cabinet door Place the space cone of the probe on the door cabinet door seam along the seam the door viewing window the exhaust air vents the suction air vents Measuring should be in a counter clockwi...

Page 23: ...Y GY BK GY WH SECONDARY INTERLOCK SWITCH GN GN BL GY GY RELAY 1 RELAY 2 CONTROL P W B ASS Y GY 3 2 1 INTERLOCK MONITOR SWITCH NOTE RD RED WH WHITE BK BLACK GN GREEN BR BROWN OR ORANGE BL BLUE GY GRAY GE GREEN YELLOW CL CAVITY LAMP FM FAN BLOWER MOTOR GM GEARED MOTOR CONDITION DOOR CLOSED COOK OFF POWER SUPPLY SINGLE PHASE ONLY FILTER ASS Y FUSE GN N L N L GN BL Fig 2 1 KOR 122M Q1A ...

Page 24: ...cools the magnetron by blowing the air coming from the intake on the rear plate hole 3 The oven lamp light the inside of the oven 4 Indicator light turns on to indicate function operation Cooking time starts count down 5 3 3 Volts AC is generated from the filament winding of the high voltage transformer This filament voltage is applied to the magnetron to heat the magnetron filament through two no...

Page 25: ...icrowave oven from power level 1 to HI 100 power One complete ON and OFF cycle of the RELAY 1 is 29 seconds The relation between indications on the control panel and the output of the microwave oven is as shown in Fig 4 OR FA F OR H V CAPACITOR H V DIODE MAGNETRON WIRING COLOR OR ORANGE H V TRANSFORMER Fig 3 ...

Page 26: ... microwave oscillation 2 The second interlock switch is opened to give the door open information to touch control circuit The contacts of the RELAY 1 and 2 open the display stops counting down 3 Fan motor and turn table stop rotating 4 The oven lamp turns off 5 The soon as the door is opened the interlock monitor switch contacts close and create the short circuit 6 If the contacts of primary inter...

Page 27: ...en the 20 Amp fuse is blown out due to operation of the monitor switch replace primary secondary and monitor switch Refer to 18 page for the necessary adjustment 5 After repair or replacement of parts make sure that the screws are properly tightened and all electrical connections are tightened 6 Do not operate without cabinet SAFETYPRECAUTIONSFORDISASSEMBLYANDREPAIR CAUTION Service personnel shoul...

Page 28: ...ove door assembly 1 Remove two screws F32 which secure the top hinge stopper A03 2 Remove the door assembly A00 from top plate 3 Reverse the above for reassembly 3 To remove door parts DISASSEMBLY AND ASSEMBLY F02 F32 A00 A03 A01 A07 A08 A02 A04 A03 A05 A06 ...

Page 29: ...k switch assembly inward as possible to engage with hook on the door bottom 4 Tighten a screw 4 To reduce gap located on part D See Fig 6 1 Remove the cabinet 2 Loosen a screw on interlock switch assembly located bottom of oven body 3 and 4 are same as step 3 LOCK NO CUPS oz lb STAGE 1 2 DEFROST WEIGHT TIME AUTO START SPEEDY COOK MICROWAVE OVEN KOR 122M POPCORN Clock Auto Start Power STOP CLEAR ST...

Page 30: ...tton spring B06 from the control panel B02 5 Reverse the above steps for reassembly F35 NOTE Do not attempt to remove switch membrane except for replacement e e h h h h h h e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e...

Page 31: ...ve the capacitor holder F06 with capacitor F09 3 Reverse the above steps for reassembly High voltage circuit wiring 7 To remove magnetron 1 Remove three screws F16 holding the magnetron F17 2 Pull out the magnetron F17 from the wave guide 3 Reverse the above steps for reassembly F08 F06 F07 F09 MAGNETRON H V CAPACITOR H V DIODE H V TRANS F17 F16 ...

Page 32: ... e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e g g g g g g 9 To remove wind guide assembly 1 Remove a screws F41 holding wind guide assembly 2 Remove ...

Page 33: ...OTING GUIDE 1 Incomplete segments A Segments missing B Partical segments missing C Digit flickering other than normal slight flickering D 0 does not display when power is on 2 A distinct change in the brightness of one or more numbers in the display 3 One or more digits in the display are not on when they should be 4 Display indicates a number different from one touched 5 For example touch 5 and 3...

Page 34: ...board failure please check for the continuity of each wire harness between the membrane keyboard and control box assembly e e h h h h h h e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e ...

Page 35: ...n PCB Connector LOCK NO CUPS oz Ib STAGE 1 2 DEFROST WEIGHT TIME AUTO START Soup Popcorn Beverage Muffin Frozen Pizza Baked Potato Fresh Vegetable Dinner Plate More Less AUTO DEF SPEEDY COOK STOP CLEAR Power Clock A Start START 2 3 1 5 6 4 8 9 7 0 MICROWAVE OVEN KOR 122Q Fig 7 1 ...

Page 36: ...ENU Fig 8 Key Matrix 1 5 pad Between A and F 2 0 pad Between A and G 3 POWER pad Between A and H 4 SPEEDY COOK pad Between A and I 5 MENU pad Between A and K 6 6 pad Between B and F 7 1 pad Between B and G 8 MUFFIN pad Between B and I 9 WEIGHT pad Between B and K 10 7 pad Between C and F 11 2 pad Between C and G 12 BEVERAGE pad Between C and I 13 MORE pad Between C and J 14 AUTO DEFROST pad Betwee...

Page 37: ...pad Between A and F 2 0 pad Between A and G 3 POWER pad Between A and H 4 SPEEDY COOK pad Between A and I 5 6 pad Between B and F 6 1 pad Between B and G 7 SOUP pad Between B and H 8 MUFFIN pad Between B and I 9 7 pad Between C and F 10 2 pad Between C and G 11 FRESH VEGETABLE pad Between C and H 12 BEVERAGE pad Between C and I 13 MORE pad Between C and J 14 AUTO DEFROST pad Between C and K 15 8 p...

Page 38: ...tage transformer Approx 90 120Ω normal Disconnect one side of the lead wire connected from transformer to the high voltage capacitor and operate the unit 0Ωor infinite Shorted or open winding Defective high voltage transformer 20A fuse again blows Defective high voltage capacitor Replace Replace 20A fuse NOTE 1 Replace Primary Interlock Switch and Secondary Interlock Switch and monitor Interlock S...

Page 39: ...h Replace Display do not shown countdown Condition Check Cause Result Remedy Turn table motor fan moter and oven lamp do not turn on Check continuity of primary interlock switch No Continuity Malfunction of Primary interlock switch Adjust or replace Approx 24VDC Faulty contacts of RELAY 2 coil Replace Defective touch control circuit Replace Check D C voltage being supplied to RELAY 2 coil 0V TROUB...

Page 40: ...tinuity Check the isolation of filament winding transformer No Good Good Defective high voltage transformer Defective magnetron No Continuity No Continuity Defective magnetron Replace Replace Defective high voltage transformer No Continuity Continuity Continuity Continuity in the reverse direction Defective high voltage diode Replace Check continuity of filament of magnetron Check continuity of fi...

Page 41: ... e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e g g g g g g POWER RELAY 1 ON TIME RELAY 1 OFF TIME 0 0 29 1 3 Seconds 26 Seconds 2 5 24 3 8 21 4 11 18 5 14 15 6 ...

Page 42: ...ce 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 diodes resistance will be infinite in one direction and several hundred KΩ in the other direction 4 Magnetron For complete magnetron diagnosis refer to Measurement of the Microwave Output Power Page 20 Contin...

Page 43: ...s interlock monitor switch primary and secondary interlock switches check 1 In case of interlock monitor switch check Condition 1 Door is opened 2 Common terminal of the monitor switch disconnected 2 In case of primary interlock switch check Condition 1 Door is closed PRIMARY INTERLOCK SWITCH INTERLOCK MONITOR SWITCH POWER SUPPLY CORD OHMMETER PRIMARY INTERLOCK SWITCH INTERLOCK MONITOR SWITCH POWE...

Page 44: ...e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e g g g g g g NOTE Each measure point must be measured with GND points e e h h h h h h e e e e e e e e e e e e e...

Page 45: ...44 Measurement Point MP2 MP1 ...

Page 46: ... on from G1 to G5 SEGMENT a 7 20 SEGMENT b doesn t come on from G1 to G5 SEGMENT b 6 19 SEGMENT c doesn t come on from G1 to G5 SEGMENT c 5 18 SEGMENT d doesn t come on from G1 to G5 SEGMENT d 4 17 SEGMENT e doesn t come on from G1 to G5 SEGMENT e 3 16 SEGMENT f doesn t come on from G1 to G5 SEGMENT f 2 14 SEGMENT g doesn t come on from G1 to G5 SEGMENT g 1 13 LOCK NO CUPS g don t come on LOWER BA...

Page 47: ...CHECK METHOD POINT A STAGE RELAY 2 ON GND RELAY 2 OFF 12V DC POINT A B STAGE RELAY 1 ON 5VDC GND RELAY 1 OFF GND 12VDC POINT A B STAGE 1 DOOR OPENED OPEN 5VDC 2 DOOR CLOSED CLOSE GND D8 1N4002A B Q11 KRC106M A 39 MGT RY IC1 2 A B C2 104 V1 R16 10K R15 D6 1N4148M YW396 02V CN1 D O M C1 473 R17 1K 1K 37 DOM IC1 1 CHECK METHOD REMEDY NO 1 Check the stage ON OFF of the secondary Replace secondary Inte...

Page 48: ...ot operate properly If clock does not keep exact time you must check resistor R21 R22 and capacitor C5 LVT1 A D12 1N148M R22 10K R21 4 7K ZD2 5 1V C5 104 23 EXINT IC1 POINT WAVEFORM A 4 3V GND T T 20 ms 50Hz 16 67ms 60Hz T 16 67ms 60Hz ...

Page 49: ...48 2 P C B CIRCUIT DIAGRAM CN1 D O M INSERT ONLY KOR 121QOD POP CORN KOR 122M0A M1A ...

Page 50: ...49 CN1 D O M INSERT ONLY KOR 121QOD POP CORN BAKED POTATO FRESH VEGETABLE SOUP KOR 122Q0A Q1A ...

Page 51: ...tal Transistor Emitter Collector Base Q9 DIODE Cathode K ZENER DIODE Cathode K ANODE A D1 D14 ANODE A ZD1 ZD2 Q9 D1 D6 D8 D14 ZD1 ZD2 Emitter Collector Base Q9 Q1 Q8 Q11 Q13 R1 R2 Emitter BASE Collector R1 4 7KΩ 4 7KΩ RESISTOR TYPE KRC106M KRA110M R2 47KΩ Internal circuit ...

Page 52: ...51 4 PRINTED CIRCUIT BOARD ...

Page 53: ... 18 P C B BARE M152 M152 3514315400 1 19 LED DISPLAY DP1 DDG611Q DDDG611Q00 1 20 C ARRAY CA1 F6 102Z CN6XB 102M 1 21 TRANSISTOR Q9 KTA1270Y TZTA1270Y 1 22 TRANSISTOR Q1 Q5 KRA110M TZRA110M 5 23 TRANSISTOR Q6 Q8 Q10 Q13 KRC106M TZRC106M 7 24 CONNECTOR WAFER CN1 YW396 02V 3519150520 1 25 CONNECTOR WAFER CN3 YM396 05AV 3519150510 1 26 CONNECTOR WAFER CN2 FCZ254 11 441M367160 1 27 BUZZER BZ1 BM 20K 35...

Page 54: ...1 A04 3511708100 DOOR PAINTING AS KOR 121M0A 1 A05 3517004200 BARRIER SCREEN I POLYESTER T0 1 1 A06 3512300700 GASKET DOOR PP 1 A07 3513100900 HOOK POM 1 A08 3515101300 SPRING HOOK PW1 1 DOOR ASSEMBLY 3511708030 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 Pa...

Page 55: ...PING T2S TRS 4X12 MFZN 4 B05 3513702500 LEVER DOOR OPEN POM 1 B06 441G430171 SPRING DOOR BUTTON SWP DIA 0 7 1 B07 3516905050 BUTTON DOOR OPEN ABS AF 345 HFA 700HT 1 CONTROL PANEL ASSEMBLY KOR 122M0A M1A PKCPSWLZ00 KOR 122Q0A Q1A PKCPSWM900 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 inform...

Page 56: ...55 F31 F30 F30 F30 F41 F03 F04 F42 F05 F06 F07 F08 F09 F10 F11 F12 F13 F14 F29 F28 F27 A00 F26 F25 B00 F24 F23 F22 F21 F20 F19 F18 F17 F16 F15 F32 F33 F34 F35 F36 F37 F38 F39 F40 F43 F44 EXPLODED VIEW ...

Page 57: ...SCREW TAPPING T2S PAN 4X6 MFZN 2 F23 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 6 F24 3512100900 FOOT PP DASF 130 2 F25 7272400811 SCREW TAPTITE TT3 TRS 4X8 MFZN 1 F26 3515202800 STOPPER HINGE U AS KOR 121M4A 1 F27 3517400620 COUPLER XAREC 1 3512512920 GUIDE ROLLER AS KOR 121M4A 1 F28 3514701501 ROLLER TEFLON D 14 5 3 F29 3512519300 GUIDE ROLLER PP 5113MF6 A353B 1 F30 441X335A10 TRAY BORO S1 GLASS ...

Page 58: ...ECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC FAX 02 590 6291 TEL 02 360 7114 590 6151 5 http www dwe daewoo co kr PRINTED DATE July 1999 ...

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