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LG 50PG20D Service Manual
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LG 50PG20D Service Manual

LG 50PG20D Service Manual

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PLASMA TV
SERVICE MANUAL
CHASSIS : PA81A
MODEL : 50PG20D
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Internal Use Only
website:http://biz.LGservice.com
50PG20D-AA

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Summary of Contents for LG 50PG20D

  • Page 1 Internal Use Only website:http://biz.LGservice.com PLASMA TV SERVICE MANUAL CHASSIS : PA81A MODEL : 50PG20D 50PG20D-AA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    SPECIFICATION ..................4 ADJUSTMENT INSTRUCTION ..............6 TROUBLE SHOOTING ................11 BLOCK DIAGRAM...................17 EXPLODED VIEW .................. 24 SVC. SHEET ....................PRINTED CIRCUIT DIAGRAM ..............Copyright©2008 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©2008 LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...

  • Page 4: Specification

    LGE SPEC. 2)Humidity : 20~80% Storage Environment 3)Temp. : -20~60deg 4)Humidity : 10~90% Input Voltage 100-240V~, 50/60Hz Maker : LG Copyright©2008 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 Analog(D-Sub 15Pin) HDMI Input(3EA) HDMI-PC HDMI1/DVI,HDMI2,HDMI3(Side) HDMI-DTV Audio Input (6EA) RGB/DVI Audio, Component, AV SPDIF Out(1EA) SPDIF Out X-Studio(JPEG,MP3), Upgrade(USB1.3) Side Copyright©2008 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Adjustment Instruction

    (3) Select model name by using (CH+/-)and press (3) S/W download process is executed automatically. ENTER( Model Name Model Option Value 50PG20D-AA 32013360 Copyright©2008 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 Product ID Product ID HDMI EDID table Name Analog(RGB) 50PG20D 501155 C3C3 C3C3 500116 Digital(HDMI) 3EA C3C4 C4C3 (2) HDMI 1 Copyright©2008 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...

  • Page 8: Adjustment Method

    * PC(for communication through RS-232C) -> UART Baud rate : 115200 bps (Fig.2) 50” Full HD Power PCB Assy Voltage adjustment Copyright©2008 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 (1) Push the menu button in DTV mode. (2) Select the SETUP -> Diagnostics -> To set. (3) Check the information. Copyright©2008 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 Sleep Timer / Auto Off Option SIMPLINK Key Lock ISM Method Normal Power Saving Level 0 Channel Memory Analog Digital Copyright©2008 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...

  • Page 11: Trouble Shooting

    9. Check the Power Manufacture enterprise Module output circuit Module output circuit Board Output high meaning of a passage tension circuit Copyright©2008 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 VSC Board though Cable connected? Measure output voltages(16V,12V,5V) on the power board. If the measured values is not normal, replace power board. Copyright©2008 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 After crisis COF of each board, check the normality operates. normal ? If in case normality operates, correspondence COF Fail is replace the module. Copyright©2008 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
  • Page 14 Check the PDP Module Reconnect the LVDS Is the LVDC cable normal? cable in P501 Is the IC700(FLI106X0H) Replace the VSC. Output normal? Copyright©2008 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 Replace the VSC B/D normal? normal? Replace the IC100(FLI106X0H) Is the Ctrl Board of Replace the Ctrl B/D. Module normal? Copyright©2008 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
  • Page 16 (4) In the case of becomes unusual display from side S-video/AV mod Is the Video input of the AV Check the input source (JK105, JK106) normal? Same as Block A Copyright©2008 LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 (7) In the case of becomes unusual display from component mode Is the Video input of Check the input source component jack normal? Same as Block A Copyright©2008 LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
  • Page 18 Replace the IC602 Is the IC602 normal? (MSP4458) Replace the IC601 Is the IC601 normal? (NTP-3000A) Replace the VSC Board Copyright©2008 LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...

  • Page 19: Block Diagram

    BLOCK DIAGRAM NLASB3157 IC1013 NLASB3157 IC502 Tuner (TDFV-G135D1) TU301 Copyright©2008 LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
  • Page 20 Copyright©2008 LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...
  • Page 21 Copyright©2008 LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...
  • Page 22 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. - 23 - LGE Internal Use Only Only for training and service purposes...

  • Page 24: Exploded View

    EXPLODED VIEW Copyright©2008 LG Electronics. Inc. All right reserved. - 24 - LGE Internal Use Only Only for training and service purposes...
  • Page 25 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC . ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC . Copyright©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS LVDS,AFE ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC . Copyright©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 PRINTED CIRCUIT BOARD MAIN(TOP) MAIN(BOTTOM) PREAMP B/D(TOP) Control B/D(TOP) PREAMP B/D(BOTTOM) Control B/D(BOTTOM) Copyright©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 Apr., 2008 P/NO : MFL41834603 Printed in Korea...

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