AOC D2757PH Service Manual
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AOC D2757PH Service Manual

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27" LCD Color Monitor
D2757PH/BS
Service
Service
Service
Description
Table of Contents.........................................................1
Revision List................................................................2
Important Safety Notice...............................................3
1.Monitor Specification.................................................4
2.LCD Monitor Description.......................................6
3.Operation Instruction...............................................7
3.1.General Instructions.................................................7
3.2.Hot Keys......................................................7
3.3.OSD Setting.......................................................8
4.Input/Output Specification.......................................25
4.1.Input Signal Connector.........................................25
4.2.Factory Preset Display Modes...............................26
4.3.Panel Specification.............................................28
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

Table of Contents

Page
Description
5.Block Diagram............................................29
6.Schematic.......................................................30
6.1.Main Board....................................................30
6.2.Key Board......................................................37
7.PCB Layout.....................................................38
7.1.Main Board....................................................38
7.2.Key Board....................................................38
8.Maintainability..................................................39
8.2.Trouble Shooting.........................................40
10.Monitor Exploded View.................................46
11.BOM List..................................................48
SAFETY NOTICE
AOC D2757PH
Horizontal Frequency
30-83 KHz
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Summary of Contents for AOC D2757PH

  • Page 1: Table Of Contents

    27" LCD Color Monitor AOC D2757PH D2757PH/BS Service Service Service Horizontal Frequency 30-83 KHz Table of Contents Description Page Description Page 5.Block Diagram……..…………....29 Table of Contents..……......……..1 6.Schematic……………........30 Revision List.…........…………..2 6.1.Main Board………...........30 Important Safety Notice.……......……..3 6.2.Key Board...……..........37 1.Monitor Specification......………..4 7.PCB Layout..…………........38 2.LCD Monitor Description……………………………..6...

  • Page 2: Revision List

    Revision List Version Release Date Revision History L&T Model Name HFCJHJ2MCS3ADNF.LF JUL-11-2012 Initial Release HFCJHJ2BCSK2DNF.LF HFCJHJ2MCSRLDNF.LF HFCJHJ2LCSCADNF.LF AUG-20-2012 Add new models HFCJHJ2FCSUMDNF.LF HFCJHJ2TCS1RDNF.LF...

  • Page 3: Important Safety Notice

    Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended.

  • Page 4: Monitor Specification

    1. Monitor Specifications...

  • Page 6: Lcd Monitor Description

    2. LCD Monitor Description The LCD MONITOR will contain a main board and a key board which house the flat panel control logic, brightness control logic and DDC. Monitor Block Diagram Flat Panel and LED Drive. LED backlight Main Board Key Board HDMI1 HDMI2...

  • Page 7: Operation Instruction

    3. Operating Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The other control knobs are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences. 3.2 Hotkeys Power Press the Power button to turn on/off the monitor.

  • Page 8: Osd Setting

    3.3 OSD Setting Basic and simple instruction on the control keys. 1) Press the MENU-button to activate the OSD window. 2) Press or to navigate through the functions. Once the desired function is highlighted, press the MENU-button to activate it . p ress or to navigate through the sub-menu functions. Once the desired function is highlighted, press MENU-button to activate it.
  • Page 9 Luminance MENU 1. Press (Menu) to display menu MENU 2. Press < or > to select (Luminance), and press to enter. MENU 3. Press < or > to select submenu, and press to enter.
  • Page 10 4. Press < or > to adjust. AUTO Press to exit.
  • Page 12 Image Setup MENU 1. Press (Menu) to display menu. MENU 2. Press < or > to select (Image Setup) , and press to enter. MENU 3. Press < or > to select submenu, and press to enter.
  • Page 13 4. Press < or > to adjust. AUTO Press to exit.
  • Page 14 Color Setup MENU 1. Press (Menu) to display menu. MENU 2. Press < or > Color to select Setup) , and press to enter. MENU 3. Press < or > to select submenu, and press to enter.
  • Page 15 4. Press < or > to adjust. AUTO Press to exit.
  • Page 16 Picture Boost MENU 1. Press (Menu) to display menu. MENU 2. Press < or > (Picture Boost) to select , and press to enter. MENU 3. Press < or > to select submenu, and press to enter.
  • Page 17 4. Press < or > to adjust. AUTO Press to exit.
  • Page 18 OSD Setup MENU 1. Press (Menu) to display menu. MENU 2. Press < or > (OSD Setup) to select , and press to enter. MENU 3. Press < or > to select submenu, and press to enter.
  • Page 19 4. Press < or > to adjust. AUTO Press to exit.
  • Page 20 Extra MENU 1. Press (Menu) to display menu. MENU 2. Press < or > (Extra) to select , and press to enter. MENU 3. Press < or > to select submenu, and press to enter.
  • Page 21 4. Press < or > to adjust. AUTO Press to exit. Input Select Analog Select Analog Signal Source as Input Auto Config yes or no Auto adjust the picture to default Off timer 0-24hrs Select DC off time Image Ratio wide or 4:3 Select wide Select wide or 4:3 format for display DDC-CI...
  • Page 22 2D/3D VGA input mode: Press the Menu key to enter the OSD menu and select the 2D/3D menu.2D,2D-3D,3D(SBS),3D(T/B) modes are available for switchover. When select 2D,3D SBS),3D(T/B) mode,the Stereo Index,Convergence and Scene icon in sub tier menu is disable and grey. 2.
  • Page 23 HDMI input mode under 2D: Press the Menu key to enter the OSD menu and select the 2D/3D menu. When select 2D-3D mode, the Stereo Index, Convergence and Scene icon in 3D sub tier menu is able to adjust. HDMI input mode un r 3D: Press th e Menu key to enter the OSD menu and select the 2D/3D/ menu. Only Auto(3D) is able to select, 2D-3D, 3D SBS),3D(T/B) mode is disable and grey...
  • Page 24 Exit MENU 1. Press (Menu) to display menu. MENU 2. Press < or > (Exit) to select , and press to enter. AUTO Press to exit.

  • Page 25: Input/Output Specification

    4. Input/Output Specification 4.1 D-SUB CONNECTORS and DVI CONNECTORS Pin Assignments 15-Pin Side of the Signal Cable Pin Number Pin Number 15-Pin Side of the Signal Cable Video-Red Video-Green Ground N.C. Video-Blue N.C. DDC- Serial data Detect Cable sync GND-R sync GND-G DDC-...

  • Page 26: Factory Preset Display Modes

    4.2 Factory Preset Display Modes HORIZONTAL VERTICAL STAND RESOLUTION FREQUENCY(kHZ) FREQUENCY(Hz) 640x480@60Hz 31.469 59.940 640x480@72Hz 37.861 72.809 640x480@75Hz 37.500 75.000 800x600@56Hz 35.156 56.250 800x600@60Hz 37.879 60.317 SVGA 800x600@72Hz 48.077 72.188 800x600@75Hz 46.875 75.000 1024x768@60Hz 48.363 60.004 1024x768@70Hz 56.476 70.069 1024x768@75Hz 60.023 75.029 1280x1024@60Hz...

  • Page 27: Panel Specification

    4.3 Panel Specification 4.3.1 General Features LM270WF6-S2Z2 is a Color Active Matrix Liquid Crystal Display with an integral Light Emitting Diode (LED) backlight system. The matrix employs a-Si Thin Film Transistor as the active element. It is a transmissive type display operating in the normally white mode.
  • Page 28 4.3.3 Electrical Characteristics Values Parameter Symbol Unit Notes MODULE : Power Supply Input Voltage Permissive Power Input Ripple 60Hz 1195 75Hz Power Supply Input Current ILCD 1170 60Hz 1125 1460 75Hz PLCD_TYP 3.68 4.78 Watt (@60Hz) Power Consumption PLCD_MAX 4.50 5.98 Watt (@60Hz)

  • Page 29: Block Diagram

    4.3.4 Optical Characteristics Ta=25 °C, V =5.0V, f =60Hz, D =72MHz, Is=110mA Values Parameter Symbol Units Notes Contrast Ratio 1000 Surface white cd/m Luminance Luminance Variation WHITE Response Time (Gray to Gray) 0.640 0.338 0.315 GREEN Color Coordinates 0.623 [CIE1931] -0.03 +0.03 0.151...
  • Page 33 D405 RLZ5.6B C428 NC/100N16V D404 RLZ5.6B C427 NC/100N16V D403 RLZ5.6B C426 NC/100N16V C425 NC/0.1UF 16V C424 NC/0.1UF 16V D401 NC/RLZ5.6B HX6833-A...
  • Page 35 R647 NC/750R 1/10W 5% R648 NC/750R 1/10W 5% R618 NC/750R 1/10W 5% OUTR R617 NC/750R 1/10W 5% OUTL...

  • Page 38: Pcb Layout

    7. PCB Layout 7.1 Main Board 715G5240M0D000004L R634 R626 C802 R628 C804 C630 R631 C640 L601 CN302 C625 FB410 R635 C639 R636 C442 CN301 Q301 C635 Q303 C638 R480 R632 Q402 L703 D401 FB411 Q602 Q601 ZD702 R633 C306 C424 D403 C715 R623...

  • Page 39: Maintainability

    8. Maintainability 8.1 Equipments and Tools Requirement Voltmeter. Oscilloscope. Pattern Generator. DDC Tool with an IBM Compatible Computer. Alignment Tool. LCD Color Analyzer. Service Manual. User Manual.

  • Page 40: Trouble Shooting

    8.2 Trouble Shooting No Power No power Check power cable is Re-plug the power cable tightened? Check Power “On/Off” Turn on the Power “On/Off” switch is “On”? Check the LED Check the AC power indicate is OK? Replace main board and check connections Replace key board and check connections...
  • Page 41 2. No Video (Power LED White) No Video (Power LED White) Press the power Replace the main board button is OK? Replace the main The end board and connection Check the LVDS/FFC Replace the LVDS/FFC cable or panel cable or panel Replace the key board...
  • Page 42 3. DIM DIM (image overlap, focus or flicker) Reset in factory mode The end Set to the optimal The end frequency, select the recommended frequency Readjust the phase and pixel The end clock in the user mode Pull out signal cable and Check the signal cable check “Self Test Feature and the PC...
  • Page 43 4. Color is not optimal Color is not optimal Color shift Miss color Reset the factory mode Replace the signal cable In the user mode, set the” color settings” until customer satisfy The end Pull out the signal cable and check the screen color display is normal? Replace the signal cable or PC Replace the main board...

  • Page 44: White-Balance, Luminance Adjustment

    9. White- Balance, Luminance Adjustment Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. How to setting MEM channel you can reference to chroma 7120 user guide or simpl use “SC” key and “NEXT” Key to modify xyY value and use “ID”...
  • Page 45 C. Adjust Cool (9300K) color-temperature 1. Switch the Chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM. Channel to Channel 9 (with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x = 283 ±30, y = 297 ±30 4.
  • Page 47 Part No. Description A34G2932-OPA1B0130 BEZEL F12G6301003 PAD_KEY A33G1260--1-1C0100 power lens 750DMT270W6Z21N100 PANEL LM270WF6-S2Z2 A15G1826101 BKT_HINGE CBPCCHJA1Q1 CONVERTER BOARD A15G1839101 MAIN_FRAME A34G2933AED-1B0100 MIDDLE_FRAME A37G0311011 HINGE_ASS'Y A34G2934AEDA1B0130 REAR_COVER A20G0040002 DC_STAND A34G2936AED-1B0130 STAND A33G1345AED-1B0100 COVER_STAND A33G1346--1--X0100 LATCH F19G0001--1 SPRING A20G0041001 HOLDER A33G1347AED-1B0100 FRAME BUTTOM A33G1257AED-1B0100 RELEASE BTN A34G2937-OP-1B0100...

  • Page 48: Bom List

    0M1G-130--6120 SCREW M3X6 0M1G-940--5125 .CREW 0M1G1730--8225- screw(Hinge) 0M1G3130--4120 SCREW 0Q1G-130--8120 Screw 0Q1G-140-10120 SCREW 0Q1G-930--6120 SCREW 3X6MM 3550S-1415B AL 7um,PET 75um, LM270WF5-S2A2 708GHF01-CP-2A AOC 40(1088) 044G6000--4-6B SPACE PAPER F07G1130--F715 Compound Pallet F44G710K140135 Empty Carton Q44G6002110-60 PAPER BAORD Q44G9003208 CORNER PAPER...
  • Page 49 Q45G--77--4 PE FILM Q45G--77--5 PE PACKING (Y1900241) Q50G---4-10 TIE (Y1900221) Q52G---1185-98 3M TAPE 750DMT270W6Z21 PANEL LM270WF6-S2Z2 N100 2436L-2917A LM270WF6-S2Z2-K31 EGI, 0.5, Not-painted, Down, 3110T-1049A LM270WF5-S2A2 3850L-0088A ID, YUPO, 78X37 6091L-2122A LM270WF5-S2A2 3022L-1927A TORAY, TDF127, 0.145, LM270WF5-S2A2 LGE, SOS-S10H-280, 0.284, angle = 4?, 3032L-1482A LM270WF5-S2A2 TORAY, T6D6-245, None, 0.245,...
  • Page 50 7250L-0864A NITTO, NITTO 5000NS, Clear, 30*3*0.16 6925L-0013A LM270WF6(SJZ1,S2Z2) 6060L-2675A LM270WF6-SJZ1-831 6061L-2182A LM270WF6-SJZ1-831 LS0609MEH2-C1TX, LUSEM, 960, 6BIT, EPI, 0ILUL-0227A C_B, R/TP, 48MM, 6PF, KAPTON-EN, ENG LSXXSPBRXXX5-02700T01, 619.8*352.2, 6308L-4347A LGC, S, X, X, S, P, B, R, X, X, X5, 02700, Top, LSBXSPBRXXXS-02700B01, 601.3*339.7, 6308L-4348A LGC, S, B, X, S, P, B, R, X, X, XS, 02700,...
  • Page 51 225,C226,C227,C228,C2 29,C24,C25,C26,C27 0.1U F, 25 Volt, Z PER, Y5V(JF), 1005 R/TP, C105 0CH2A-0038A T0.55(MAX) C231,C232,C80 0CH2A-0040A 10uF, K, 10V, X5R, 0.95mm, 2012, R/TP 10 Volt, X7R(JB), K %, 1005 R/TP, 0.1U F, C20,C23,C230 0CH2A-0068A T=0.55 MAX C2,C3,C5,C71,C72 0CH2A-0072A MLCC ** 10uf K,10V,X5R,1.35mm,2012,R/TP C120,C121,C82 0CH2A-0088A 3.3nF, K, 50V, X7R, 0.9mm, 1608, R/TP...
  • Page 52 29,R230,R231,R232,R23 3,R234,R235,R236,R237, R239,R243,R258,R259,R 32,R35,R36,R37,R56,R60 ,R65,R7,R82,R90 R242 0RH0221C622 2.2 OHM 1/16W 1608 5% D R/TP R50,R51,R52,R53 0RH0302C422 30 OHM 1/16W 1608 1% D R/TP R20,R21,R22,R222,R223, R224,R225,R23,R24,R25, 0RH0472C422 47 OHM 1/16W 1608 1% D R/TP R26,R27 R105,R2,R3,R4 0RH1000C422 100 OHM 1/16W 1608 1% D R/TP R1,R15 0RH1001C422 1K OHM 1/16W 1608 1% D R/TP...
  • Page 53 7250L-1488B 15*25*0.11 HWASUNG SEALING, STN1026WR(P), Gray, 7250L-2469A 10*30*0.11, Electric Conductivity 756GQCCB0AA00 MCU ASS'Y 70000 IC FLASH MX25L2026DM1I-12G 2Mb SOP-8 U402 056G2233501 MXIC SMTCC-U402 100GAHJG000YT1 AOC D2757PH A15G1826101 BKT_HINGE A15G1827102 BKT_BASE A15G1839101 MAIN_FRAME A20G0040002 DC_STAND A20G0041001 HOLDER A20G0042001 DC_BRACKET A33G1257AED-1B RELEASE BTN...
  • Page 54 A34G2935AED-1B COVER_HINGE 0100 A34G2936AED-1B STAND 0130 A34G2937-OP-1B0 BASE A37G0311011 HINGE_ASS'Y ADPCB1245YA1 POWER G901-2A-15-X-4-110819 AM1G1740-10225- screw CBPCCHJA1Q1 CONVERTER BOARD 033G801930F-CH-- CN301 WAFER 30P 1.0MM JINGSHI 033G801930F-CH-- WAFER 30P 1.0MM XIANGLONG 2nd source EC 470uF +-20% 16V 8*9mm 3000Hr C631,C716 067G-315471-3K CHINSAN C702,C704 067G215C4713KV LOW ESR EC 470uF 16V 8*9mm...
  • Page 55 055G--23520 055G--23524--A WELDING FULX WITHOUT Pb Q49G--51100 GW2066 Cleaner Q55G-100622 TIN STICK(SAC0507) Q55G-100625 TIN STICK_LOW ARGENTUM SMTC01 SMTCCHJA1Q1 MAIN BOARD FOR SMT SMTCCHJA1Q1W MAIN BOARD FOR SMT WB 2nd source IC SCALER HX6833-A EPAD-LQFP-128 U401 056G-562A16 Himax IC LDO DC/DC G5725ADJT11U 1A/6V U701,U702 056G-563368 SOT-23-5 GMT...
  • Page 56 RST CHIPR 10 OHM -5% 1/16W 0402 061G0402100-JY 2nd source YAGEO R103,R109,R115,R515,R RST CHIPR 10 OHM +-5% 1/16W 0402 TZAI 061G0402100-JT YUAN RST CHIPR 10 OHM -5% 1/16W 0402 061G0402100-JY 2nd source YAGEO R119,R120,R416,R420,R 424,R441,R443,R445,R4 RST CHIPR 100 OHM +-5% 1/16W 0402 TZAI 061G0402101-JT 49,R489,R490,R501,R52 YUAN...
  • Page 57 YUAN RST CHIPR 15 KOHM -5% 1/16W 0402 061G0402153-JY 2nd source YAGEO RST CHIPR 22 OHM +-5% 1/16W 0402 TZAI R475,R476,R477,R478 061G0402220-JT YUAN RST CHIPR 22 OHM -5% 1/16W 0402 061G0402220-JY 2nd source YAGEO RST CHIPR 2.2 KOHM +-5% 1/16W 0402 R121,R122,R410 061G0402222-JT TZAI YUAN...
  • Page 58 RST CHIPR 47 OHM -5% 1/16W 0402 061G0402470-JY 2nd source YAGEO RST CHIPR 470 OHM +-5% 1/16W 0402 TZAI R626 061G0402471-JT YUAN RST CHIPR 470 OHM -5% 1/16W 0402 061G0402471-JY 2nd source YAGEO R101,R113,R307,R388,R 389,R411,R452,R456,R4 061G0402472-JI RST CHIPR 4.7 KOHM +-5% 1/16W 0402 TA-I 57,R458,R714 RST CHIPR 4.7 KOHM -5% 1/16W 0402 061G0402472-JY...
  • Page 59 TA-I R413 061G0603201-JI RST CHIPR 200 OHM +-5% 1/10W TA-I RST CHIPR 200 OHM -5% 1/10W 0603 061G0603201-JY 2nd source YAGEO RST CHIPR 300 KOHM +-5% 1/10W 0603 R805,R814 061G0603304-JI TA-I RST CHIPR 330 KOHM +-1% 1/10W 0603 R816 061G06033303FI TA-I RST CHIPR 4.7 KOHM +-1% 1/10W 0603 R817...
  • Page 60 SAMSUNG C403,C606,C607,C610,C 065G0402105A5K- MLCC 0402 1uF +-10% 10V X5R SAMSUNG 617,C618,C641 065G0402105A5K- NO-SUGGEST MLCC 0402 1uF -10% 10V 2nd source X5R TDK 065G0402105A5K- MLCC 0402 1uF +-10% 10V X5R TAIYO C417 YUDEN 065G0402105A5K- MLCC 0402 1uF -10% 10V X5R SAMSUNG 2nd source 065G0402105A5K- NO-SUGGEST MLCC 0402 1uF -10% 10V...
  • Page 61 065G040268232K-- C604,C605 MLCC 0402 6.8nF +-10% 50V X7R YAGEO 065G040268232K-- MLCC 0402 6.8nF -10% 50V X7R 2nd source SAMSUNG 065G060310131J-- C630,C712,C721,C811 MLCC 0603 100pF +-5% 50V NPO MURATA 065G060310131J-- MLCC 0603 100pF -5% 50V NPO 2nd source SAMSUNG 065G060310232K-- C724,C814,C817 MLCC 0603 1000pF +-10% 50V X7R YAGEO 065G060310232K-- MLCC 0603 1000pF -10% 50V X7R...
  • Page 62 X7R TDK 065G060347412K-- MLCC 0603 0.47uF -10% 16V X7R 2nd source SAMSUNG C406,C407,C433,C447,C 065G0805106A5K- 448,C449,C450,C608,C6 MLCC 0805 10uF +-10% 10V X5R SAMSUNG 22,C728,C729 065G0805106A5K- NO-SUGGEST MLCC 0805 10uF -10% 10V 2nd source X5R TDK 065G080522232K-- C806,C808 MLCC 0805 2200pF +-10% 50V X7R YAGEO 065G080522232K-- MLCC 0805 2200pF -10% 50V X7R 2nd source...
  • Page 63 088G-34019H-VA HDMI HEADER 19P VAST 2nd source DIODE SCHOTTKY BAT54C-HAF 0.2A 30V D501,D502 093G--60518SEM SOT-23 SEMTECH DIDOE SCHOTTKY LBAT54CLT1G 0.2A 30V 093G--60515--L 2nd source SOT-23 LRC DIDOE ZD ZM-PTZ9.1BST 9.1V/1W LL-41 ZD601,ZD701 093G-39GA52--T SEMTECH D403,D404,D405,ZD101, DIODE ZD GLZ5.6B MINI-MELF 5.6V/0.5W ZD102,ZD501,ZD502,ZD5 093G-39S940--T LL-34 PANJIT...
  • Page 64 3D GLASSES DZ1006(R) ROR F17G-3DG504ROR 3D GLASSES DC1008(R) ROR F19G0001--1 SPRING Rating Label For D2757PH_I2757FH AP-CH F40G270W615-1A F40GYA03615-7A POP Label for D2757PH F40GYA0361519A ICE AGE4 Carton sticker label F41G78D1615-7A warranty card for AP F44GHF01102 F44GHF01202 F44GHF01615-1A Carton for D2757PH Sliver...
  • Page 65 RST CHIPR 100 OHM +-5% 1/16W 0402 TZAI R004 061G0402101-JT YUAN RST CHIPR 10 KOHM +-5% 1/16W 0402 TZAI R001 061G0402103-JT YUAN RST CHIPR 4.7 KOHM +-5% 1/16W 0402 R002,R003,R007,R008 061G0402472-JT TZAI YUAN 065G040210131J-- C008 MLCC 0402 100pF +-5% 50V NPO YAGEO 065G040210131J-- MLCC 0402 100pF -5% 50V NPO 2nd source...
  • Page 66 Q01G7000--A--6 Screw Q12G6600--6 FOOT Q12G6600-12 foot pad Q36G-600517 duster cloth Q40G000161515A CARTON LABEL(70*40) Q40G0001624-4A PALLET LABEL Q40G0003615A80 QC PASS LABEL Q45G--88607-53 PE BAG FOR BASE Q45G2010M0201A pe bag for manual Q45G9901609281- EPE BAG Q52G1501527...

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