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LG 22LJ4540-PU Service Manual
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LG 22LJ4540-PU Service Manual

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LED TV
SERVICE MANUAL
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO :
MFL69169574 (1701-REV01)
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 © 2017 LG Electronics Inc. All rights reserved.
Only training and service purposes.
LU72A
22LJ4540
CONFIDENTIAL
22LJ4540-PU

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Summary of Contents for LG 22LJ4540-PU

  • 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 ..................6 SOFTWARE UPDATE ................9 TROUBLE SHOOTING GUIDE ............... 10 BLOCK DIAGRAM .................. 14 EXPLODED VIEW .................. 15 Copyright © LG Electronics. Inc. All right reserved. - 2 - 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. Copyright © LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...

  • Page 4: Servicing Precautions

    Copyright © LG Electronics. Inc. All right reserved. - 4 - 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. 3. Solder the connections. Copyright © LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Specification

    USB (Side, 1EA) For My Media(Photo/Music List) Picture + Music (only 284LJ4540 support) D-Sub RGB-PC 2xLJ4540/LF454B not support 2xMT49DF not support Copyright © LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 HDTV 1080P 1920* 1080 56.250 148.5 HDTV 1080P 1920* 1080 67.43 / 67.5 59.94 / 60 148.35/ 148.50 HDTV 1080P Copyright © LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 1920x1080p 56.250 50.000 67.432 59.940 67.500 60.000 - Video Color Format : YcbCr 444, 422 (xvYcc is not supported) Copyright © LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...

  • Page 9: Software Update

    5) Updating is starting. 6) Updating Completed, The TV will restart automatically. * After downloading, have to adjust TOOL OPTION again. Copyright © LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...

  • Page 10: Trouble Shooting Guide

    Replace IC503 & Check IC503 Output Recheck Voltage Level (5V) Check X300 Clock Replace X300 24MHz Replace IC405 Flash Memory Copyright © LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 P402 (#10, #11 ) Check FFC Cable for Damage or Replace Cable Open Conductors Replace T-Con Board or Module Copyright © LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 1. Check RF IC(L200) Power (3.3V) Recheck 2. Check IC1001 Output voltage(3.3V) Replace TU200 or Check SCL/SDA Line(TU200 #1, #2) IC300(=> Main Scaler) Copyright © LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 Check JK100 for proper Replace Connector connection or Damage Check I2C Signal Re Download EDID Data (JK100) Replace Main Scaler (IC300) Copyright © LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...

  • Page 14: Block Diagram

    BLOCK DIAGRAM Copyright © LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...

  • Page 15: Exploded View

    Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Copyright © LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...

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