LG 65UN7000PUD Service Manual
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LG 65UN7000PUD Service Manual

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LED TV
SERVICE MANUAL
Chassis : K6LP
MODEL : 65UN7000PUD
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL
P/NO : MFL71744001(2006-REV00)
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),
publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you
have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual.
The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service
Manual.
Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes

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  • Page 1 Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service Manual.
  • Page 2 SPECIFICATION………………………………..……………….10 MAIN IC BLOCK DIAGRAM ………..…………………………15 EXPLODED VIEW …………………………..………………….17 DISASSEMBLY PROCESS ...…………………………………19 ASSEMBLY PROCESS ………………….…………………….28 TROUBLE SHOOTING GUIDE ..........37 SW Update(USB / NSU) ………………………….……………86 Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 3: Safety Precautions

    In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer. Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 4 Leakage Current Hot Check circuit Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 5: Servicing Precautions

    8.Use with this receiver only the test fixtures specified in this service manual. CAUTION: Do not connect the test fixture ground strap to any heat sink in this receiver. Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 6 500 ° F to 600 ° F. 2.Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts lead. 3.Keep the soldering iron tip clean and well tinned. Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 7 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. (It is not necessary to reapply acrylic coating to the areas). Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 8 2.Securely crimp the leads of replacement component around notch at stake top. 3.Solder the connections. CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 9 Carefully crimp and solder the connections. CAUTION: Be sure the insulated jumper wire is dressed so the it does not touch components or sharp edges. Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 10: Specification

    2.5The receiver must be operated for about 20 minutes prior to the adjustment. 3. Test method 3.1 Performance: LGE TV test method followed. 3.2 Demanded other specification Safety : CE, IEC specification EMC : CE, IEC Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 11 AV and DVI use same jack Audio out SPDIF Optical Audio out Vertical USB Input EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 12 5.Component Video Input (Y, Cb/Pb, Cr/Pr) Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 13 6. HDMI Input (DTV&PC): Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 14 6. HDMI Input (DTV&PC): Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 15: Main Ic Block Diagram

    Main IC Block Diagram Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 16 1.Main Circuit Block Diagram Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 17: Exploded View

    It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 17 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 18 EXPLODED VIEW(MODULE) - 18 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 19: Disassembly Process

    DISASSEMBLY PROCESS 1.Unlock the screws to remove the stand out of the TV 2.Unlock the screws and remove the pins to separate the back cover Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 20 3. Remove the pins,tapes and screws to separate the Main board, Power board ,VESA Supports and Stand Supports 4.Remove the pins,tapes and screws to separate the IR/WIFI/SPK board from the rear cover Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 21 DISASSEMBLY PROCESS 5.Remove the power board and main board 6.Move to next page for Panel Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 22 1.Remove the screws & tapes to separate the PCB board and front bezel - Remove the screws bottom side(Red) & tapes in Source PCB(Yellow) 2.Take out the source PCB from the VELCRO Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 23 - After finish 2, reverse module as below picture and progress disassembly 1) Disassemble front bezel(top/right/left) with tool such as plastic crowbar Tool 2) Disassemble front bezel from the front of panel Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 24 2) Lift up Panel ※ Need to reuse Middle Cabinet, 1Diffuser Sheet& 1Prism Sheet & 1Diffuser Plate & 1Reflect Sheet. Keep without damage during disassembly Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 25 3) Disassemble Middle cabinet. Below red point is hook position. Carefully detach it - Reuse middle cabinet when assembly again. Keep without damage during disassembly ※ Hook Position ※ Detach it as below Use crowbar Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 26 1) 1Diffuser Sheet & 1Prism Sheet & 1Diffuser Plate & 1Reflect Sheet. Keep without damage during disassembly 1Diffuser Sheet 1Prism Sheet 1Diffuser Plate 1Reflect Sheet 2) Left over BLU plate assy Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 27 DISASSEMBLY PROCESS Module 6. Remove LED Light-Bar 1) Remove screws and tapes to separate the LED Light-Bar 2) Take away LED Light-Bar Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 28: Assembly Process

    1. Assemble the LED Light-Bar 1) Place LED Light-Bar on the metal back cover 2) Install the screws & tapes to assemble the LED Light-Bar Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 29 2. Assembly Sheet & Diffuser plate. 1) Prepare BLU Plate Assy 2) Assemble Sheet & Diffuser plate 1Diffuser Sheet 1Prism Sheet 1Diffuser Plate 1Reflect Sheet Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 30 3. Assemble Middle Cabinet 1) Prepare Middle Cabinet and attach hook with BLU plate assy as below by hands 4. Put down Panel on the Middle Cabinet Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 31 5.Carefully assemble the front bezel on the panel 1) Prepare front bezel and screw bottom side. Then attach top/right/left side by hands as below 2) Check assembly condition Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 32 7. Install the screws & tapes to the assemble the PCB board and front bezel -Install the screws bottom side(Red) & tapes in Source PCB(Yellow) Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 33 ASSEMBLY PROCESS Module 8.Install panel ok. Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 34 1.Install the power board and main board 2. Install the cables,pins,tapes and screws to assembly the Main board, Power board, VESA Supports and Stand Supports Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 35 3.Install the cables,pins,tapes and screws to assemble the IR/WIFI/SPK board from the rear cover 4. Install the pins of the WIFI/IR cable and SPK before covering the back cover and screws Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 36 ASSEMBLY PROCESS 5. Install the screws on the back cover 6.Install the screws to assemble the stand bases. Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 37: Troubleshooting Guide

    TROUBLE SHOOTING GUIDE Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 38 E. Noise Circuit noise, mechanical noise F. Exterior error Exterior defect First of all, Check whether there is SVC Bulletin in GSCS System for these model. Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 39 ☞A4 & A2 ※Precaution Always check & record S/W Version and White Balance value before Replace Main Board Re-enter White Balance value replacing the Main Board Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 40 Revised date ☞A18 Check various voltages of Check and No Video/ Normal Power Board (13.2V…) replace MAIN No audio voltage? Replace Power Board and repair parts Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 41 1. Reconnection 2. Install Booster S/W Upgrade Normal Contact with signal distributor Picture? or broadcaster (Cable or Air) Normal Replace Picture? Main B/D Close Close Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 42 Check Test pattern Replace Main/T-con B/D cable error normal Request repair for external device/cable External device Check external device HDMI /Cable Replace Main/T-con B/D error normal cable Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 43 Standard Repair Process Established A. Video error Error date symptom Vertical / Horizontal bar, residual image, Revised date light spot, external device color error Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 44 Measure voltage of each output of Power B/D Normal? Normal Replace Main B/D voltage? Normal Check ST-BY 3.5V voltage? Close ☞A18 Replace Power B/D Replace Power B/D Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 45 Error? Replace Main B/D Abnormal Check for all phase Replace Power B/D Abnormal power out Fix A/C cord & Outlet and check each phase out Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 46 Reboot by SW down load function UNKNOWN No meaning (same as initial value) COMP_END OLED threshold voltage degradation(Compensation) completes. PNWASHDONE Power off by panel noise wash function complited. (OLED) Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 47 No audio Speaker off Power Board voltage Screen normal Cancel OFF Replace Power Board and repair parts Check Speaker Disconnection Replace MAIN Board disconnection Replace Speaker Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 48 (In case of External Input Normal Connect and check other signal error) audio? external device Check and fix external device Check and fix external device Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 49 Replace Main B/D (Power B/D don’t have problem) If R/C operate, Normal Close operating? Explain the customer cause is interference from light in room. Replace R/C Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 50 “NG”? menu Voltage? 1pin Main B/D ☞A24 Close Check & Repair Wifi cable connection ☞A4 Wi-Fi Mac value Close is “NG”? Change the Wifi assy Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 51 Standard Repair Process Established D. Function error Error date symptom External device recognition error Revised date Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 52 ※ If there is a “Tak Tak” noise from the cabinet, refer to the KMS fix information and then proceed as shown in the solution manual (For models without any fix information, provide the description) Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 53 Revised date Module Zoom part with exterior Replace module damage damage Cabinet Replace cabinet damage Remote control Replace remote control damage Stand Replace stand dent Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 54 Exchange Module (1) ~ (3) A-8/11 A-9/11 ~ Only using Exchange T-Con (1) ~ (2) T-con model A-10/11 Exchange Power Board(PSU) A-11/11 Continue to the next page Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 55 Remote operation checking method A24- How to use the Service remote control E. Etc Check items after Main B/D replacement Adjustment Test pattern – ADJ Key Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 56 Check LCD back light with naked eye date After turning on the power and disassembling the case, check with the naked eye, whether you can see light from locations. Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 57 2. Enter into White Balance. 3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm), re-enter the value after replacing the MAIN BOARD. Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 58 Standard Repair Process Detail Technical Manual Error symptom Established A. Video error_Video error, video lag/stop date Revised Content TUNER input signal strength checking method date <ALL MODELS> Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 59 Version checking method date <ALL MODELS> 1. Checking method for remote control for adjustment 65UN81006LB Version Press the IN-START with the remote control for adjustment Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 60 1. Check the signal strength or check whether the screen is normal when the external device is connected. 2. After measuring each voltage from power supply, finally replace the MAIN BOARD. Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 61 Revised Content connection diagram (1) date <ALL MODELS> As the part connecting to the external input, check the screen condition by signal Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 62 A. Video error_Color error date Revised Content Check Link Cable(Vx1/EPI) reconnection condition date Check the contact condition of the Link Cable, especially dust or mis insertion. Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 63 CABLE Screen darkness disconnection of the FFC cable pin. G color transient due to poor FFC cable CABLE G Color Excessive connection A - 1/11 Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 64 LVDS cable connection problem CABLE Color spread LVDS cable connection problem Due to foreign substance withi nLVDS CABLE Screen stop cable PIN A - 2/11 Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 65 Main IC problem Main Dark picture Dark left-side screen Top/bottom screen part Main Broken picture Picture problem due to tuner Inner side quality problem A - 3/11 Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 66 Screen spread Screen corner appears blurry Main Color Spread Color spread on the screen Main Blurry Screen Blurry picture on the screen A - 4/11 Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 67 Screen picture spread problem Screen problem No problem at the initial stage. Right-side picture Main During Heat run, right-side picture problem problem A - 5/11 Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 68 BLU internal foreign matter inflow MODULE Internal matter 6 block image broken MODULE Image broken MODULE Image broken Screen sync signal broken A - 6/11 Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 69 BLU Vertical spreading on cube screen in no MODULE Vertical smear signal MODULE Over color Screen contour part brightly Over color A - 7/11 Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 70 Center of the screen 1 block dark MODULE Screen darkness MODULE Vertical bar Center Vertical Bar Darkness at the MODULE bottom of the MODULE internal BLU breakage screen A - 8/11 Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 71 T-Con is defective and the picture below T-CON image broken the screen is broken A - 9/11 Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 72 The entire screen is dark and bit noise T-CON Image Broken occurs The entire screen is dark and bit noise T-CON Image Broken occurs A - 10/11 Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 73 Appendix. Exchange Power Board (PSU) No Light No picture/Sound Ok A - 11/11 Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 74 Error symptom Established B. Power error _No power date Revised Content Check front Power Indicator date ST-BY condition: On or Off Power ON condition: Turn Off Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 75 PDIM(PWM Dimming) PDIM/ADIM Frequency ADIM(Analog (DC)dimming) Vin=70V, BLON=3.3V PDIM =100% RL=2 String Lam η EFFICIENCY CN201 all condition meets, Power Board OK. CN102 (AC input) CN101 Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 76 <ALL MODELS> 65UN81006LB K6LP Entry method 1. Press the IN-START button of the remote control for adjustment 2. Check the entry into adjustment item 3 Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 77 1. Press the Setting button on the remote control 2. Select the Sound function of the Menu 3. Select the Sound Out 4. Select TV Speaker Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 78 3. Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the GND and output terminal, the speaker is normal. Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 79 2. Check the standby 3.5V on the terminal 6 pin. (③) 3. AS checking the Pre-Amp(IR LED light), the power is in ON condition, an Analog Tester needle should move slowly, otherwise, it’s defective. Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 80 Checking order to check motion remote/wifi Checking order 1. Check BT/Wifi cable condition between BT/Wifi assy & Main board. 2. Check the 3.5V on the terminal 22. Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 81 Error symptom Established E. Etc date Revised Content How to use the Service remote control date 1. How to access the remote control 65UN81006LB K6LP Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 82 Digital EYE function ON/OFF For some Model, access to the Test Pattern TILT Used for screen tilting change (Access to the old PDP control mode) Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 83: Time Shift

    Connects to external input 1,2,3 function) COMP1,2 (Added Connects to Component 1,2 function) HDMI1,2,3,4 Connects to HDMI 1,2,3,4 (Add function) DVI (Add function) Connects to DVI Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 84 Standard Repair Process Detail Technical Manual Error symptom Established E. Etc date Revised Content Check items after Main B/D replacement date Check items after Main B/D(Model Number D/L, White Balance) Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 85 You can view 9 types of patterns using the ADJ Key Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..) 4.Video error (Classification of MODULE or Main-B/D!) Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 86 SW Update (USB / NSU) Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 87: Usb Download

    (2) Automatically detect the SW Version and show the below message (3) Click [YES]: initiate the download and install of the update. (4) Click [Check Now]: move to “About This TV” page for update Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 88 (6) After finished the update, below Pop-up appear (7) Click [Yes] : TV will be DC OFF -> ON (8) After TV turned on, Check the updated SW Version and Tool Option Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 89 (1) Menu -> All Settings -> Support -> Software Update (2) Click [CHEK FOR UPDATES] : system check newest version (3) Click [DOWNLOAD AND INSTALL] Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 90 (4) TV is updating (5) After finished the update, below Pop-up appear (6) Turn OFF the TV and On. Check the updated SW Version and Tool Option Copyright ⓒ 2020 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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