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LG 22LN4000 Service Manual
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LG 22LN4000 Service Manual

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LED TV
SERVICE MANUAL
CHASSIS : LM91N
MODEL : 22LN4000
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67698505 (1303-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
22LN4000-TA
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea

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Summary of Contents for LG 22LN4000

  • Page 1 Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LED TV SERVICE MANUAL CHASSIS : LM91N MODEL : 22LN4000 22LN4000-TA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL67698505 (1303-REV00) Printed in Korea...

  • Page 2: Table Of Contents

    ADJUSTMENT INSTRUCTION ............... 7 TROUBLE SHOOTING GUIDE ............... 10 BLOCK DIAGRAM ................. 18 EXPLODED VIEW .................. 19 SCHEMATIC CIRCUIT DIAGRAM .............. - 2 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 3: Safety Precautions

    An other abnormality exists that must be corrected before the receiver is returned to the customer. - 3 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 4: Servicing Precautions

    - 4 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 5 1. Clip each fuse or resistor lead at top of the circuit board hollow stake. 2. Securely crimp the leads of replacement component around notch at stake top. - 5 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 6: Specification

    PAL, SECAM, NTSC 4 System(Rear) :PAL50, SECAM, NTSC, PAL60 RGB Input RGB-PC Analog (D-SUB 15Pin) Audio Input (1EA) CVBS L/R Input - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 7: Adjustment Instruction

    2) Input the Option Number that was specified in the BOM, into the Shipping area. (2) Connect the PC to USB jack - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 Version Analog : 1 bin) by clicking and open. Revision Analog : 3 Model Name 2D HD LG TV - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 ■ Check input and Signal items. (cf. work instructions) ■ Color Analyzer : CA-210 1. TV ■ CH: 14 (LCD MNT, Normal) → 22LN4000 2. AV (CVBS) ■ PC (for communication through RGB) 3. RGB (PC : 1366 x 768 @ 60hz)(Display only) ■...

  • Page 10: Trouble Shooting

    Or check Line short or open of P120 change IR board Or check Line short or open of P120 Insert F/W - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 If is under 10.8V at L710, Check open and short Of line between L710 and P101. Insert the F/W back or REPLACE LCD MODULE - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12 Of line between Q703 and P101. Or Check LVDS cable have damage. Another is change IC600. Change module WAVEFORMS - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 Check Line between TU401 and IC600 is open or short, Another is change IC600 or TU401 Change Main PCBA WAVEFORMS - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 Or change f ormat CVBS Check Line between JK101 and IC600 is open or short, Another is change AV cable Change IC600 WAVEFORMS - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 And then check resistance of speaker is under 4ohm. Another is change IC502 Change speaker and wire - 15 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16 Check Line between TU401 and IC600 is open or short, Another is change IC600 or TU401 Change Main PCBA WAVEFORMS - 16 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 Insult AV cable tight Check Line between JK101 and IC600 is open or short, Another is change AV cable Change IC600 WAVEFORMS - 17 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 18: Block Diagram

    BLOCK DIAGRAM - 18 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 19: Exploded View

    X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 19 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 Copyright © 2013 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

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22ln4000-ta

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