background image

49

R521

RD-AZ471J-

R CARBON FILM

1/6 470 OHM J

R522

RD-AZ122J-

R CARBON FILM

1/6 1.2K OHM J

R523

RD-2Z221J-

R CARBON FILM

1/2 220 OHM J

R524

RS02Z680JS R M-OXIDE FILM

2W 68 OHM J SMALL

R525

RS02Z240JS R M-OXIDE FILM

2W 24 0HM J SMALL

R526

RD-2Z229J-

R CARBON FILM

1/2 2.2 OHM J

R527

RD-AZ222J-

R CARBON FILM

1/6 2.2K OHM J

R528

RD-AZ392J-

R CARBON FILM

1/6 3.9K OHM J

R530

RS01Z330JS R M-OXIDE FILM

1W 33 OHM J SMALL(TP)

R531

RD-2Z100J-

R CARBON FILM

1/2 10 OHM J

R532

RD-AZ102J-

R CARBON FILM

1/6 1K OHM J

R534

RD-2Z681J-

R CARBON FILM

1/2 680 OHM J

R535

RD-4Z472J-

R CARBON FILM

1/4 4.7K OHM J

R536

RD-AZ472J-

R CARBON FILM

1/6 4.7K OHM J

R537

RD-AZ683J-

R CARBON FILM

1/6 68K OHM J

R538

RD-4Z472J-

R CARBON FILM

1/4 4.7K OHM J

R539

RD-AZ472J-

R CARBON FILM

1/6 4.7K OHM J

R540

RS02Z560JS R M-OXIDE FILM

2W 56 OHM J SMALL

R541

RD-AZ102J-

R CARBON FILM

1/6 1K OHM J

R542

RD-AZ153J-

R CARBON FILM

1/6 15K OHM J

R543

RD-AZ123J-

R CARBON FILM

1/6 12K OHM J

R544

RD-AZ391J-

R CARBON FILM

1/6 390 OHM J

R545

RD-AZ471J-

R CARBON FILM

1/6 470 OHM J

R546

RD-AZ154J-

R CARBON FILM

1/6 150K OHM J

R547

RS02Z560JS R M-OXIDE FILM

2W 56 OHM J SMALL

R548

RS02Z122JS R M-OXIDE FILM

2W 1.2K OHM J SMALL

R549

RD-AZ822J-

R CARBON FILM

1/6 8.2K OHM J

R550

RN-AZ1803F R METAL FILM

1/6 180K OHM F

R551

RD-AZ913J-

R CARBON FILM

1/6 91K OHM J

R552

RD-AZ123J-

R CARBON FILM

1/6 12K OHM J

R553

RS02Z122JS R M-OXIDE FILM

2W 1.2K OHM J SMALL

R554

RS02Z122JS R M-OXIDE FILM

2W 1.2K OHM J SMALL

R555

RS02Z680JS R M-OXIDE FILM

2W 68 OHM J SMALL

R556

RD-AZ223J-

R CARBON FILM

1/6 22K OHM J

R557

RD-4Z472J-

R CARBON FILM

1/4 4.7K OHM J

R558

RD-AZ472J-

R CARBON FILM

1/6 4.7K OHM J

R559

RD-AZ152J-

R CARBON FILM

1/6 1.5K OHM J

R560

RW01Z568JN R WIRE WOUND

1W 0.56 OHM J NON-INDUCT

R561

RD-AZ823J-

R CARBON FILM

1/6 82K OHM J

R562

RD-AZ823J-

R CARBON FILM

1/6 82K OHM J

R563

RD-AZ101J-

R CARBON FILM

1/6 100 OHM J

R564

RD-AZ102J-

R CARBON FILM

1/6 1K OHM J

R565

RD-AZ474J-

R CARBON FILM

1/6 470K OHM J

R566

RD-AZ104J-

R CARBON FILM

1/6 100K OHM J

R568

RW01Z568JN R WIRE WOUND

1W 0.56 OHM J NON-INDUCT

R570

RD-AZ103J-

R CARBON FILM

1/6 10K OHM J

R571

RD-AZ103J-

R CARBON FILM

1/6 10K OHM J

R572

RD-AZ103J-

R CARBON FILM

1/6 10K OHM J

R575

RD-AZ472J-

R CARBON FILM

1/6 4.7K OHM J

LOC

PART-CODE

PART-NAME PART-DESC

R576

RD-AZ223J-

R CARBON FILM

1/6 22K OHM J

R579

RD-4Z220J-

R CARBON FILM

1/4 22 OHM J

R580

RD-AZ824J-

R CARBON FILM

1/6 820K OHM J

R581

RD-4Z100J-

R CARBON FILM

1/4 10 OHM J

R584

RD-4Z473J-

R CARBON FILM

1/4 47K OHM J

R585

RD-4Z473J-

R CARBON FILM

1/4 47K OHM J

R586

RD-4Z473J-

R CARBON FILM

1/4 47K OHM J

R587

RS02Z209JS R M-OXIDE FILM

2W 2 OHM J SMALL

R588

RS02Z209JS R M-OXIDE FILM

2W 2 OHM J SMALL

R589

RD-AZ103J-

R CARBON FILM

1/6 10K OHM J

R592

RD-AZ472J-

R CARBON FILM

1/6 4.7K OHM J

R593

RD-AZ472J-

R CARBON FILM

1/6 4.7K OHM J

R594

RS02Z470J-

R M-OXIDE FILM

2W 47 OHM J (TAPPING)

R595

RN-AZ5111F R METAL FILM

1/6 5.11K OHM F

R596

RN-AZ1502F R METAL FILM

1/6 15K OHM F

R597

RD-AZ104J-

R CARBON FILM

1/6 100K OHM J

R598

RD-AZ243J-

R CARBON FILM

1/6 24K OHM J

R599

85801052GY WIRE COPPER

1/0.52 TIN COATING

R601

RD-2Z184J-

R CARBON FILM

1/2 180K OHM J

R602

RD-2Z334J-

R CARBON FILM

1/2 330K OHM J

R603

RD-2Z105J-

R CARBON FILM

1/2 1M OHM J

R604

RD-4Z122J-

R CARBON FILM

1/4 1.2K OHM J

R607

RD-AZ244J-

R CARBON FILM

1/6 240K OHM J

R608

RD-2Z331J-

R CARBON FILM

1/2 330 OHM J

R609

RD-4Z244J-

R CARBON FILM

1/4 240K OHM J

R611

RD-2Z680JS

R CARBON FILM

1/2 68 OHM J SMALL

R612

RD-4Z102J-

R CARBON FILM

1/4 1K OHM J

R613

RD-4Z244J-

R CARBON FILM

1/4 240K OHM J

R614

RD-4Z243J-

R CARBON FILM

1/4 24K OHM J

R615

RD-AZ682J-

R CARBON FILM

1/6 6.8K OHM J

R616

RD-2Z334J-

R CARBON FILM

1/2 330K OHM J

R801

RD-AZ750J-

R CARBON FILM

1/6 75 OHM J

R802

RD-AZ330J-

R CARBON FILM

1/6 33 OHM J

R803

RD-AZ360J-

R CARBON FILM

1/6 36 OHM J

R804

RD-4Z181J-

R CARBON FILM

1/4 180 OHM J

R805

RD-4Z121J-

R CARBON FILM

1/4 120 OHM J

R811

RD-AZ101J-

R CARBON FILM

1/6 100 OHM J

R812

RD-AZ279J-

R CARBON FILM

1/6 2.7 OHM J

R813

RD-AZ279J-

R CARBON FILM

1/6 2.7 OHM J

R815

RD-AZ562J-

R CARBON FILM

1/6 5.6K OHM J

R816

RD-4Z564J-

R CARBON FILM

1/4 560K OHM J

R831

RD-AZ750J-

R CARBON FILM

1/6 75 OHM J

R832

RD-AZ330J-

R CARBON FILM

1/6 33 OHM J

R833

RD-AZ360J-

R CARBON FILM

1/6 36 OHM J

R834

RD-4Z181J-

R CARBON FILM

1/4 180 OHM J

R835

RD-4Z121J-

R CARBON FILM

1/4 120 OHM J

R841

RD-AZ101J-

R CARBON FILM

1/6 100 OHM J

R842

RD-AZ101J-

R CARBON FILM

1/6 100 OHM J

R861

RD-AZ750J-

R CARBON FILM

1/6 75 OHM J

LOC

PART-CODE

PART-NAME PART-DESC

Содержание 719B

Страница 1: ...DAEWOO ELECTRONICS CO LTD http svc dwe co kr Service Manual February 2001 XGA COLOR MONITOR Model 719B 719BF ...

Страница 2: ...AL INFORMATION 7 PIN CONNECTOR 8 CAUTIONS FOR ADJUSTMENT AND REPAIR 8 OPERATION AND ADJUSTMENT 9 ALIGNMENT PROCEDURE 15 TROUBLESHOOTING HINTS 17 BLOCK DIAGRAM 33 PCB LAYOUT 34 SCHEMATIC DIAGRAM 38 EXPLODED VIEW MECHANICAL PARTS LIST 42 INFORMATION OF PART DESCRIPTION 44 ELECTRICAL PARTS LIST 45 CONTENTS ...

Страница 3: ...ntial that these critical parts should be replaced with manufacturer s specified parts to prevent X Ray shock fire or other hazards Do not modify the original design without getting written permission from DAEWOO ELECTRONICS CO or this will void the original parts and labor warranty CAUTION No modifications of any circuits should be attempted Service work should be performed only after you are tho...

Страница 4: ...sult in damage to the equipment or other property WARNING Statements identify conditions or practices that could result in personal injury or loss of life Terms as marked on equipment CAUTION Statements indicate a personal injury hazard not immediately accessible as one reads the marking or a hazard which is properly included on the equipment itself WARNING Statements are clearly concerning indica...

Страница 5: ...to the contacts with a pipe cleaner cotton tipped stick or comparable nonabrasive applicator 10 by volume Aceton and 90 by volume isopropyl alchohol 90 99 strength 6 Do not damage any plug socket B voltage interlocks with which instruments covered by this service manual might be equipped 7 Do not apply AC power to this instrument and or any other of its electrical assemblies unless all the solid s...

Страница 6: ...ectrically shorted together by conductive foam aluminum foil or comparable conductive material 7 Immediately before removing the protective material from the leads of replacement ES devices touch the protective material to the chassis or circuit assembly into which the device will be installed 8 Minimize bodily movements when handling unpackaged replacement ES devices Otherwise harmful motion such...

Страница 7: ...an anti static suction type solder removal device or with desoldering braid before removing the IC Replacement 1 Carefully insert the replacement IC in the circuit board 2 Carefully bend each IC lead against the circuit foil pad and solder it 3 Clean the soldered areas with a small wire bristle brush lt is not necessary to reapply acrylic coating to the area Small Signal Discrete Transistor Remova...

Страница 8: ...diode around the corresponding lead on the circuit board 4 Securely crimp each connection and solder it 5 Inspect the solder joints of the two original leads on the circuit board copper side If they are not shiny reheat them and apply additional solder if necessary TECHNICAL INFORMATION Model 719B 719BF CDT Size 17 inch 17 inch DynaFlat Diagonal visible image area 16 2 inch 16 01 inch Dot Pitch 0 ...

Страница 9: ...from 50Hz to 160Hz This color monitor supports IBM PC PC XT PC AT personal System 2 PS 2 Apple Macintosh and compatible users crisp text and vivid color graphics display when using the following graphics adapters VGA 8514 A Super VGA VESA and XGA and Apple Macintosh Video Card And so this color monitor has a maximum horizontal resolution of 1280 dots and a maximum vertical resolution of 1024 lines...

Страница 10: ...ctroy The adjustment procedure described in the service manual is made by a visual check Allow 20 minutes warm up time for the display before checking or adjusting only electrical specification or function Reform the leadwire after any repair work Caution For Servicing In case of servicing or replacing CRT high voltage sometimes remains in the anode of the CRT Completely discharge high voltage bef...

Страница 11: ...ected function Move cursor to the left window on the OSD window Decrease the value of any selected function Launch OSD On Screen Display MENU window Move cursor to the high window on the OSD window Increase the value of V size or V center Move cursor to the low window on the OSD window Decrease the value of V size or V center ...

Страница 12: ...on Move cursor to the left window on the OSD window Decrease the value of any selected function Launch OSD On Screen Display MENU window Move cursor to the high window on the OSD window Increase the value of V size or V center Move cursor to the low window on the OSD window Decrease the value of V size or V center ...

Страница 13: ...11 719B Key Process When you choose the icon on the OSD window you can exit the OSD screen Hot Key BRIGHTNESS CONTRAST OSD OFF MENU MENU MENU MENU ...

Страница 14: ...12 719BF Key Process When you choose the icon on the OSD window you can exit the OSD screen Hot Key BRIGHTNESS CONTRAST OSD OFF ...

Страница 15: ...N Adjust the position of the display horizontally left or right and vertically up or down H CENTER V CENTER Choose different preset color temperatures or set your own customized color parameters Adjust the red gain Adjust the green gain Adjust the blue gain COLOR TEMP RED GAIN GREEN GAIN BLUE GAIN Adjust the width horizontal size and the height vertical size of the display H SIZE V SIZE Adjust the...

Страница 16: ...N CONTROL FUNCTIONS Reset the screen to the Factory Preset Display Settings RECALL Adjust the vertical picture moire cancellation V MOIRE Adjust the horizontal picture moire cancellation H MOIRE Display horizontal vertical frequency and polarity STATUS ...

Страница 17: ...e In Factory Auto Alignment was done at each mode Therefore Factory preset mode has it s own value according to each control 3 Focus a Set brightness control to center and contrast control to MAX b Receive all H character pattern of 60KHz mode signal c Adjust the Focus control of FBT to obtain best Focus static focus and Dynamic focus 4 Geometric Distortion Adjustment a Receive the cross hatch pat...

Страница 18: ...st the brightness to the desired condition c Vertical red and blue lines are converged by varying the angles between the two tabs of the 4 pole magnets d Horizontal red and blue lines are converged by varying the tabs together keeping the angle between them constant e Apply a yellow cross hatch pattern on the display f Vertical green and red lines are converged by varying the angle between the two...

Страница 19: ...mbient circuit Trouble in 6 3Vdc line of the Main PWB Check the blanking pulse circuit Check the signal cable No Character Is whole screen bright Yes Yes Yes Yes Yes No No No No No Yes Yes Rk Gk Bk About 40Vpp No No Is CRT Cathode Rk Gk Bk signal level normal Is the output signal of the pin 16 18 20 pre amp IC801 TDA9210 normal Is blanking pulse pin 20 of IC801 normal Is 6 3Vdc line normal Is inpu...

Страница 20: ... S U Refer to trouble in power supply unit Is CRT heater red hot No No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes Is Heater Voltage CRT PWB about 6V Turn the Brightness Contrast control to set Maximum No Raster Is whole screen bright Check G1 voltage about 30V Is 100Vdc line normal Does turning the Sub Brightness control to the maximun on OSD menu make screen bright Is CRT G2 screen voltage ab...

Страница 21: ...ach grid G1 G2 voltage normal Is the output of pre amp IC801 TDA9210 pin 16 18 20 all normal Check video signal cable or video card Trouble in IC801 or its ambient circuit Trouble in video output circuit or ambient Replace Video output IC Trouble in 100Vdc line Replace CRT No No No No No Yes Yes Yes Yes Yes RK GK BK About 40V p p 0 7Vpp ...

Страница 22: ...s 5V Voltage about 5V Abnormal OSD Font Is the output of IC803 pin 13 14 15 normal Trouble in 5V voltage line Refer to trouble in P S U Troubie in IC803 or its ambient circuit Trouble in IC803 and its ambient circuit One color is missing Refer to Missing Color No No Yes Yes Yes Yes No ...

Страница 23: ...ircuit Check the B section of IC501 Trouble in IC501 Trouble in Horizontal output circuit No Raster Yes No Is the Collector wave form of Q504 normal Yes Yes Yes Trouble in Q505 and its ambient circuit Trouble in Q504 No No No Trouble in Q505 and its ambient circuit 10V 0V 11V 0V 66V Is the Collector waveform of Q505 normal ...

Страница 24: ... Picture 6 1 Horizontal Unstable picture Is H Sync input pin of IC501 correct Check H Sync Out of Micom or its ambient circuits Is the pin 10 of IC501 12V Check the value of C513 R522 Yes Yes No No Trouble in IC501 ...

Страница 25: ... correct Check PWR 13V ambient circuit No Yes Is the output waveform of IC401 pin 6 normal Trouble in V Sync line or IC501 failure Yes No 45Vp p Is the output pulse of IC501 pin 23 normal Yes No Check V DY and ambient circuit Check the IC401 or ambient circuit ...

Страница 26: ...24 7 Focus Monitor remains unfocused Check Focus VR in FBT Is focus acceptable Trouble in Focus circuit FBT Yes OK No ...

Страница 27: ...0V 120V SAMSUNG 300V 120V 1 Check the CRT socket or connector wire 2 Trouble in FBT or CRT Check after adjusting the static focus finely by VR in FBT DF waveform FVH FVH FVV FVV No Yes Is the waveform of the pin 32 in IC501 correct Yes Trouble in Q602 R611 T601 Trouble in IC501 or C503 No ...

Страница 28: ...Convergence Is convergence on the center area bad Is convergence on the fringe area bad Adjust static convergence Refer to Adjustment procedure of convergence Yes Adjust D Y Location Yes No Poor convergence ...

Страница 29: ...27 9 Abnormal Picture 9 1 Horizontal Size When the H Size on the OSD is changed is the H size changed No Yes Check pin 11 of IC501 and its ambient circuit It isn t out of order Abnormal H Size ...

Страница 30: ...oltage of IC401 pin 6 Check the IC401 and its ambient circuit Check the pin 23 of IC501 and its ambient circuit No No Trouble V OSC Deflection Circuit Refer to V OSC Deflection circuit Yes Is the 3 5Vdc of pin 23 of the IC501 Yes Abnormal V Size ...

Страница 31: ...m normal Yes Yes No Trouble in IC501 ambient circuit Is IC501 pin 8 normal Yes No Trouble in H V circuit No Raster Trouble in IC501 ambient circuit Is the IC501 pin15 H trigger correct Yes No Trouble in H trigger Trouble in power supply circuit Is B 45V line voltage normal No ...

Страница 32: ... barrel O K Select the side pincushion icon on OSD menu and adjust acceptable position Yes Check IC803 or their ambient circuit Is the pin 5 10 waveform of IC803 correct Yes No Check IC803or it s ambient circuit Trouble in H Size Is the waveform of IC803 pin 7 8 Yes No No ...

Страница 33: ... Is voltage of C102 100Vdc Trouble in D101 or Video Part No Is voltage of C105 8Vdc Trouble in D103 No Is voltage of T001 pin 7 130V 370V Trouble in D001 D002 D003 D004 C004 and TH001 No Is the waveform of Q001 Drain pin correct 400Vpp 620Vpp Trouble in T001 IC001 Q001 and D009 etc No Yes Yes Yes Yes Is voltage of C104 45Vdc Trouble in D102 or its ambient circuit No A ...

Страница 34: ...32 Is voltage of C106 27Vdc Trouble in D108 No Is voltage of C109 13Vdc No Yes Yes Yes Is voltage of C108 13Vdc Trouble in D104 or vertical part P S U O K Trouble in D106 or horizontal part No A ...

Страница 35: ...atek H V OSC Processor TDA4856 Philips V Driver KA2142B Samsung PWM D A IIC Control H Linearity Coil TRL 531 X H Def Output TR Damper C S S witching IIC Control B PWM EUT Geometrical Compensation H V Moire Cancellation Dynamic Focus H V H Driver Drive Transformer B Booster H Size TR BD677A Fairchild FBT H V Converter Lienchang 85MHz CRT ORION 17 2SC5681 SANYO DTV 1500MFP SGS IRF630A D1273 TRL 719B...

Страница 36: ...PCB LAYOUT 34 719B 719BF Main PCB Component Side ...

Страница 37: ...35 719B 719BF Main PCB Solder Side ...

Страница 38: ...36 719B 719BF CRT PCB Solder Side 719B 719BF CRT PCB Component Side ...

Страница 39: ...37 719BF Control PCB Solder Side 719BF Control PCB Component Side ...

Страница 40: ...38 Power Connection Section SCHEMATIC DIAGRAM ...

Страница 41: ...39 Control Vert out Section ...

Страница 42: ...40 Horizontal Section ...

Страница 43: ...41 Video Section ...

Страница 44: ...42 EXPLODED VIEW MECHANICAL PARTS LIST 719B 719B ...

Страница 45: ...719B 719BF 43 ...

Страница 46: ... mark have special characteristics important for safety and x ray radiation These should be replaced only with the types specified in the parts list 00020 W3475N731 CORD POWER 3 H05VV F 3X0 75 1 8 IV B001 5PB13857 COIL BEAD BI3857 AXIAL B003 5PB13890 COIL BEAD BI3890 B004 5PB13890 COIL BEAD BI3890 B005 5PB13890 COIL BEAD BI3890 B102 5PB13857 COIL BEAD BI3857 AXIAL B104 5PB13857 COIL BEAD BI3857 AX...

Страница 47: ...J C MYLAR 100V 0 01MF J TP C885 CCZB1H102K C CERA 50V B 1000PF K C886 CCXB1H152K C CERA 50V B 1500PF K TAPPING C887 CCXB1H101K C CERA 50V B 100PF K TAPPING C889 CEXF1H100V C ELECTRO 50V RSS 10MF 5X11 TP C890 CCXF1H104Z C CERA 50V F 0 1MF Z LOC PART CODE PART NAME PART DESC C891 CCZB1H221K C CERA 50V B 220PF K C892 CCZB1H221K C CERA 50V B 220PF K C932 CMXL2E104J C MYLAR MEU 250V 0 1MF J CA202 99707...

Страница 48: ... IC REGULATOR KA78R12 IC201 1DWM240T IC MICOM NT68P62 IC202 124LC08B IC MEMORY 24LC08B LOC PART CODE PART NAME PART DESC IC401 1KA2142 IC V OUT KA2142 IC501 1TDA4856 IC H OSC TDA4856 IC801 1TDA9210 IC VIDEO PREAMP TDA9210 IC802 1TDA9536 IC VIDEO OUTPUT TDA9536 IC803 1DW0SD11 IC OSD NT6828 00005 L503 5MC0000081 COIL CHOKE CH 85D L504 5MC0000082 COIL CHOKE CH 272K L505 5MC0000085 COIL CHOKE CH 100A ...

Страница 49: ... AZ472J R CARBON FILM 1 6 4 7K OHM J R222 RD AZ472J R CARBON FILM 1 6 4 7K OHM J LOC PART CODE PART NAME PART DESC R223 RD AZ101J R CARBON FILM 1 6 100 OHM J R224 RD AZ202J R CARBON FILM 1 6 2K OHM J R225 RD AZ101J R CARBON FILM 1 6 100 OHM J R226 RD AZ202J R CARBON FILM 1 6 2K OHM J R227 RD AZ202J R CARBON FILM 1 6 2K OHM J R228 RD AZ183J R CARBON FILM 1 6 18K OHM J R229 RD AZ562J R CARBON FILM 1...

Страница 50: ...1 6 10K OHM J R572 RD AZ103J R CARBON FILM 1 6 10K OHM J R575 RD AZ472J R CARBON FILM 1 6 4 7K OHM J LOC PART CODE PART NAME PART DESC R576 RD AZ223J R CARBON FILM 1 6 22K OHM J R579 RD 4Z220J R CARBON FILM 1 4 22 OHM J R580 RD AZ824J R CARBON FILM 1 6 820K OHM J R581 RD 4Z100J R CARBON FILM 1 4 10 OHM J R584 RD 4Z473J R CARBON FILM 1 4 47K OHM J R585 RD 4Z473J R CARBON FILM 1 4 47K OHM J R586 RD ...

Страница 51: ...ZTC3198Y TR KTC3198Y 1815Y AUTO Q702 TZTC3202Y TR KTC3202Y AUTO 1959Y Q703 TZTA1270Y TR KTA1270Y AUTO 562Y LOC PART CODE PART NAME PART DESC R409 RD AZ682J R CARBON FILM 1 6 6 8K OHM J R418 RN AZ6491F R METAL FILM 1 6W 6 49K OHM F TP R420 RD 2Z811J R CARBON FILM 1 2 810 OHM J R545 RD AZ471J R CARBON FILM 1 6 470 OHM J R551 RD AZ124J R CARBON FILM 1 6 120K OHM J R701 RD AZ472J R CARBON FILM 1 6 4 7...

Страница 52: ...DAEWOO ELECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC E mail djkoo web dwe co kr ...

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