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LG HU85LA Service Manual
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LG HU85LA Service Manual

LG HU85LA Service Manual

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DLP PROJECTOR
SERVICE MANUAL
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL71485905 (2104-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 © 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.
FZ92B/ C/ D
HU85LA
HU85LG
HU85LS
HU85LA-NA
HU85LG-GL
HU85LS-EU/ JP/ NA

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Summary of Contents for LG HU85LA

  • 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: Table Of Contents

    SPECIFICATION ..................4 SOFTWARE UPDATE ................7 BLOCK DIAGRAM ................... 8 EXPLODED VIEW ..................9 DISASSEMBLY/ ASSEMBLY GUIDE ............ 10 TROUBLE SHOOTING GUIDE ............... 23 - 2 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 3: Safety Precautions

    When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver is returned to the customer. - 3 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 4: Specification

    ATSC /NTSC M/ ATSC 3.0 HU85LA-KR(Korea) Video input applicable HU85LA-NA/ HU85LS- system ATSC /NTSC-M/64&256QAM NA(US) 1) VHF : 02~13 (HU85LA-KR/NA) 2) UHF : 14~69 (HU85LA-KR/NA) 3) DTV : 02-69 (HU85LA-KR/NA) 4) CATV : 01~158 (HU85LA-KR) HU85LA-KR( Korea) Available channel CATV : 01~135 (HU85LA-NA/ HU85LS-NA)
  • Page 5 297.00 UDTV 2160P 3840*2160 56.25 25.00 297.00 UDTV 2160P 3840*2160 67.5 30.00 297.00 UDTV 2160P 4096*2160 53.95 23.97 296.70 UDTV 2160P 4096*2160 UDTV 2160P - 5 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 6 29.97 296.70 UDTV 2160P 4096*2160 67.5 30.00 UDTV 2160P 4096*2160 112.5 50.00 UDTV 2160P 4096*2160 134.86 59.94 593.40 UDTV 2160P 4096*2160 60.00 UDTV 2160P - 6 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 7: Software Update

    (8) Press button 7 on adjustment remote control 7 times (9) Once the SOFTWARE UPDATE UI is created, select Firmware. (10) Click the Update button. - 7 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 8: Block Diagram

    BLOCK DIAGRAM 1. Block Diagram - 8 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 9: Exploded View

    Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Main Board Temp Tact switch Bottom case Wifi Joy stick Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 10: Disassembly/ Assembly Guide

    11. Loosen a screw(1EA) and lift up PSU 6. Loosen a screw on Engine screw(5EA) 7. Hold part with hand and lift up Engine - 10 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 11 (4) Carefully lift the PCBA in the direction of the arrow. Make the glass surface of the DMD visible while being attached to the DMD and the PCB. - 11 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 12 - Thermal Pad P/N: 4850V00138M [9x3.5x0.5t] 4 sheets attached - Attach so that the thermal pads do not overlap and stick together. (7) Attaching Thermal Pad to DMD Heatsink Block - 12 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 13 8. Assembly Top case 9. Hold part with hand and turn it over. 10. Drive a screw at Bottom case + top case (12ea) - 13 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 14 ◆ Engine Assy’s : DMD, Source(LD), Heatsink are assembly by engine company. - Engine Module P/N -. AFD74370602 – Digital Optics -. AFD74370604 – Union Optech 114.3 Engine fix Boss( 5EA) lens illuminator Light source - 14 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 15 3) Attach between the GASKET with the wafer. SILK on the back of FPC CABLE. P1200 5) Attach caution label 5) connect Actuator cable connector - 15 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 16 Check direction CHASSIS ASSY Drive a screw after fix up GUIDE Drive a screw after fix up GUIDE BOSS BOSS - 16 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 17 2. Insert PSU shield and drive a screw. : Check the connection status after assembly. PSU : Insert to BOTTOM CASE GUIDE BOSS PLATE SHIELD : Insert to same GUIDE BOSS - 17 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 18 Insert to BOSS and drive a CASE REAR screw P104 CASE 3P Drive a SCREW No. 5->6 MAIN ASSY + CASE REAR assembly Insert to GUIDE BOSS - 18 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 19 Specification AFD74370602 KR091276 OPTICAL ENGINE HU85L AFD74370601 SVC BOM Part Only ① Chassis Assembly AFD74370604 UNION OPTICAL ENGINE HU85L Optical Engine HU85LA AFD74370603 SVC BOM Part Only ② FAB30011008 Screw,Taptite 5 FAB30011002 BRH + P 3MM 12mM ③ EBT66013801 Chassis Assembly 1 SUB-(None) HU85LA LD Driver ④...
  • Page 20 GASKET 6210VH0004B FERRITE CORE One turn 20mm One turn 50mm Check Fan label direction (arrows direction is label direction) <A> <C> <A> <A> <B> - 20 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 21 P100 P9001 P401 P101 P1002 P102 P4000 P9003 P1300 P901 P401 P100 P200 P400 P402 P400 P404 Insert to HARNESS HOLDER P104 P403 P300 - 21 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 22 1. Check the normal cable direction 2. Check the FPCB, FFC CABLE’s top & bottom direction(refer to below picture) P201 P200 Joystick Temp P901 - 22 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 23: Trouble Shooting Guide

    Not operate FAN & No image. The projector will be turned off after P1300 LD DRIVER B/D some seconds as soon as power on. - 23 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 24 The projector will be turned off after some seconds as soon as P400 TEMP B/D power on. Not operate FAN. The projector will be turned off after 10s as 6A,6B P401,P402 soon as power on. - 24 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 25 - Appendix. No image - 25 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 26 - Appendix. Image noise(vertical/horizontal line) - 26 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 27 - Appendix. Set auto-off after Power on - 27 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 28 - Appendix. No power - 28 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 29 - Appendix. No sound - 29 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

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