LG 22LS4D Service Manual
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LG 22LS4D Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : LD73B
MODEL : 22LS4D
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
website:http://biz.LGservice.com
22LS4D-ZB
Internal Use Only

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Summary of Contents for LG 22LS4D

  • Page 1: Service Manual

    Internal Use Only website:http://biz.LGservice.com LCD TV SERVICE MANUAL CHASSIS : LD73B MODEL : 22LS4D 22LS4D-ZB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    ADJUSTMENT INSTRUCTION ...............10 TROUBLE SHOOTING ................14 BLOCK DIAGRAM...................21 EXPLODED VIEW .................. 22 REPLACEMENT PARTS LIST ............... 24 SVC. SHEET ....................Copyright © 2007 LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes...

  • Page 3: Product Safety

    An other abnormality exists that must be corrected before the receiver is returned to the customer. - 3 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 4: Servicing Precautions

    Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent potential shock reasons prior to applying power to the Copyright © 2007 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only...
  • Page 5 CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Copyright © 2007 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Specification

    RGB strip arrangement Coating Hard coating (3H), Anti-glare (Haze 25%) treatment of the front polarizer, Back Light 4 CCFL - 6 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 50.00 HDTV 1080i 1920X1080 33.75 60.00 HDTV 1080i 1920X1080 33.72 59.94 HDTV 1080i 1920X1080 67.50 60.00 HDTV 1080p - 7 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 HDTV 1080P 50Hz HDCP 1920X1080 67.43 59.94 148.352 HDTV 1080P 60Hz HDCP 1920X1080 67.50 148.500 HDTV 1080P 60Hz HDCP - 8 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 59.978 121.750 1680X1050 64.674 59.883 119.00 CVT Red. Blanking 1680X1050 65.290 59.954 146.25 1920X1080 66.647 59.988 138.625 WUXGA - 9 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 10: Adjustment Instruction

    (1) ANALOG (128 bytes) This spec. sheet is applied to all of the LD73B chassis manufactured at LG TV Plant all over the world. 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F...
  • Page 11 - System control RS-232 Host should be “PC” for adjustment. automatically. - Before AV ADC Calibration, execute the “Module selection”. 5) Auto-RGB OK means adjustment is completed. Copyright © 2007 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...

  • Page 12: White Balance

    When W/B is completed, you can see ‘OK’ on PC monitor. <Fig. 2> Connecting picture (On Automatic Control) - 12 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 System Control3 AGC-L BlkLine Detector Audio Delay Power-off History DVI EQ Panel control EQ Gain Fan control XSTUDIO Control Copyright © 2007 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...

  • Page 14: Troubleshooting

    9. Check the Power Manufacture’s model Module output circuit Module output circuit Board Output high passage tension circuit - 14 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 After removing the cables, connect them to the Power Board(except the SC101 connection cable), and change the AC voltage marking to manual. When ST-BY 5V does not operate, replace the Power Board. Copyright © 2007 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only...
  • Page 16 After a COF crisis for each board, check the normal operation. For normal operation, normal ? corresponding COF failure means the module should be relaced. - 16 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 Is the LVDC cable Reconnect the LVDS cable in P800 normal? Is the IC700(FLI8548) Replace the VSC. Output normal? Copyright © 2007 LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
  • Page 18 IC(IC700) operate? normal? Replace the FIL8548 IC(IC700) Is the Ctrl Board of Replace the Ctrl B/D. Module normal? Copyright © 2007 LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...
  • Page 19 (6) In case of an unusual display in SCART1 mode Is the Video input of the Check the input source A/V Jack(J1200) normal? Same as Block A - 19 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 20: In Case Of No Sound

    Replace the IC1300 for specific input? CAX2069 refer to circuit diagram operating normally? (STA335BW) (except HDMI,DTV,RF) Replace the VSC B/D - 20 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 21: Block Diagram

    BLOCK DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...

  • Page 22: Exploded View

    EXPLODED VIEW - 22 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only for training and service purposes Only...

  • Page 24: Replacement Parts List

    Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only for training and service purposes Only...
  • Page 25 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only for training and service purposes Only...
  • Page 26 PRINTED CIRCUIT BOARD MAIN (TOP) CONTROL MAIN (BOTTOM) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only for training and service purposes Only...
  • Page 27 Aug., 2007 P/NO : MFL36695320 Printed in Korea...

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