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LG LD84A Service Manual
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LG LD84A Service Manual

Lg flat panel television user manual
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LCD TV

SERVICE MANUAL

CHASSIS : LD84A
MODEL : 32LG3000
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Internal Use Only
website:http://biz.LGservice.com
32LG3000-ZA

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Summary of Contents for LG LD84A

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : LD84A MODEL : 32LG3000 CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. Internal Use Only website:http://biz.LGservice.com 32LG3000-ZA...

  • Page 2: Table Of Contents

    SPECIFICATION ...6 ADJUSTMENT INSTRUCTION ...10 TROUBLE SHOOTING ...14 BLOCK DIAGRAM...20 EXPLODED VIEW ... 22 SVC. SHEET ... Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes CONTENTS - 2 - LGE Internal Use Only...

  • Page 3: Product Safety

    An other abnormality exists that must be corrected before the receiver is returned to the customer. Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Leakage Current Hot Check Plug the AC cord directly into the AC outlet.

  • 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 © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes SERVICING PRECAUTIONS unit under test.
  • Page 5 CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes Circuit Board Foil Repair Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board causing the foil to separate from or "lift-off"...

  • Page 6: Specification

    NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range This specification is applied to the LCD TV used LD84A chassis. 2. Requirement for Test Each part is tested as below without special appointment.
  • Page 7 SPDIF out Earphone (1EA) Antenna, AV1, AV2, AV3, Component, RGB, HDMI1, HDMI2, HDMI USB (1EA) Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes Specification DTV & Analog UK, France, Germany, Spain, Sweden, Finland, Italy,...
  • Page 8 47.72 1366*768 47.56 1440*900 55.5 1400*1050 64.744 1680*1050 65.16 1280*1024 63.595 1920*1080 66.647 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes V-freq(Hz) 60.00 59.94 59.94 60.00 50.00 50.00 50.00 59.94 60.00 50.00 60.00 59.94...
  • Page 9 1440*900 55.5 1400*1050 64.744 1680*1050 65.16 1280*1024 63.595 1920*1080 66.647 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes V-freq.(Hz) Pixel clock(MHz) 59.94 / 60 27.00 59.94 / 60 27.00/27.03 27(54) 74.25 59.94 / 60 74.17/74.25...

  • Page 10: Adjustment Instruction

    4) Click “Read” tab, and then load download file(XXXX.bin) by clicking “Read”. filexxx.bin Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes ADJUSTMENT INSTRUCTION 5. Click “Auto” tab and set as below 6.
  • Page 11 Impress Resolution 480i MODEL : 209 in Pattern Generator(480i Mode) Pattern : 65 in Pattern Generator (MSPG-925 series) Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes Impress Resolution 1080i Model : 223 in Pattern Generator(1080i Mode) Pattern: 65 in Pattern Generator(MSPG-925 series) <Fig.
  • Page 12 - Set Input to RGB and connect D-sub cable to set - Measurement Condition: (100~240V@ 50/60Hz) - Confirm DPM operation at the state of screen without Signal Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes 4.3 DDC EDID Write (RGB 128Byte ) - Connect D-sub Signal Cable to D-Sub Jack.
  • Page 13 When pressing IN-STOP key by SVC remocon, Red LED are blinked alternatively. And then Automatically turn off. (Must not AC power OFF during blinking) Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes 4.12 Internal pressure Confirm whether is normal or not when between power board's ac block and GND is impacked on 1.5kV(dc) or...

  • Page 14: Troubleshooting

    After all cables connect is removed to PSU, the AC voltage marking is authorized on manual. When ST-BY 5V, +15V are not operated, replace PSU. Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes TROUBLESHOOTING Plug in the power cord.
  • Page 15 Change the IC(IC100). * Caution Before change Main Board, Check S/W version and White Balance value. Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes Is output the normality Is the inverter on? Low/High voltage except Stand-by 5V? Check the LCD Module.
  • Page 16 4. Unusual display from DTV mode Is video output of the tuner normal?(Check TU500_ pin24~pin34) Same as Block A. Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes Is the input voltage normal?(Check TU500_Pin4) Check the Power.
  • Page 17 Is video input of the Component Jack normal?(Check R733, 734,735) Same as Block A. Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes - RGB Input Check the input source. If there is normal status, Replace main board.
  • Page 18 (IC902) Is waveform of Switching IC normal? (Check IC902) Same as Block A. Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes Check the input source. Check the IC700. If there is normal status, Replace main board.
  • Page 19 * Caution Before change Main Board, Check S/W version and White Balance value. Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes Download the EDID data. Check the Tuner in/Out. Change Main bord.

  • Page 20: Block Diagram

    BLOCK DIAGRAM PCM_CD_ON TS_Parallel PCM_ADD PCM_DATA TS_Serial SPDIF Out Head phone Out Side_Y/C/V/L/R TV Tuner Copyright © 2008 LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...
  • Page 21 MEMO Copyright © 2008 LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...

  • Page 22: Exploded View

    EXPLODED VIEW Copyright © 2008 LG Electronics. Inc. All right reserved. - 22 - LGE Internal Use Only Only for training and service purposes...
  • Page 23 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 Feb., 2008 P/NO : MFL41037107 Printed in Korea...

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