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LG 47LH41 Service Manual

Chassis : la92g
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See also: Owner's Manual
LCD TV
SERVICE MANUAL
CHASSIS : LA92G
MODEL : 47LH41
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
North/Latin America
Europe/Africa
Asia/Oceania
47LH41-UE
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com

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Summary of Contents for LG 47LH41

  • Page 1 Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LCD TV SERVICE MANUAL CHASSIS : LA92G MODEL : 47LH41 47LH41-UE CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    PRODUCT SAFETY ..................3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ...............15 TROUBLE SHOOTING ................19 BLOCK DIAGRAM...................26 EXPLODED VIEW .................. 29 SVC. SHEET ....................2009 Copyright 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. Copyright 2009 LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...
  • Page 4 2009 Copyright LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. 2009 Copyright LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Specification

    Humidity : ~ 80 % Storage Environment Temp.:-20 ~ 60 deg Humidity : ~ 85 % Input Voltage AC100 ~240V,50/60Hz Tuning system Copyright 2009 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 1) Impress 100%(255Gray Level) full white pattern at the same peak brightness measurement. 2) Measure average brightness in 5 points. Copyright 2009 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 If it does not use Prior measurement, use generally simple test measurement. The Correct measure specification is followed by IEC61988-2/CD,JAPAN EIAJ-2710 2009 Copyright LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 108.00 VESA (SXGA) 1280*1024 79.976 75.025 VESA (SXGA) 1600*1200 75.00 60.00 VESA (UXGA) 1920*1080 66.587 59.934 148.5 HDTV 1080P Copyright 2009 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 •Reference: Download is only possible in POWER ON MODE. EDID Block 0 table = EDID Block 1 table = 2009 Copyright LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 HDTV 1080P 1920*1080 26.97 23.94 74.176 HDTV 1080P 1920*1080 33.75 30.000 74.25 HDTV 1080P 1920*1080 33.71 29.97 74.176 HDTV 1080P Copyright 2009 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 EDID Block 1 table = • HDMI II[C/S: 8A17] EDID Block 0 table = EDID Block 1 table = 2009 Copyright LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 EDID Block 1 table = • HDMI IV[C/S: 8AF7] EDID Block 0 table = EDID Block 1 table = 2009 Copyright LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
  • Page 14 1485 (W)X 860 (H)X 255 (D) Product Only SET Weight With BOX 28.5 Stand Ass’y SWIVEL (±)20º degree Fixed Stand Copyright 2009 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...

  • Page 15: Adjustment Instruction

    •Factory Option setting per destination •Ship-out mode setting (In-Stop) 3.3 Etc. •Ship-out mode •Service Option Default •USB Download(S/W Update, Option) Copyright 2009 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
  • Page 16 These messages will be displayed just a second. - CS: Checksum of sent Data - A: Acknowledge Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX] 2009 Copyright LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 (80°~ 100°) - B/L on should be checked using no signal or Full white Pattern Copyright 2009 LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
  • Page 18 5) After download is complete, remove USB memory stick 6) By pressing In-Start on the adj. R/C, check the version 2009 Copyright LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...

  • Page 19: Troubleshooting

    Check URSA2 mini-LVDS output Replace Mstar(IC700) P1400, P1401 or Main board Check Replace Mstar(IC700) P1400, P1401 or Main board 2009 Copyright LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
  • Page 20 Is it supported? Check Component Cable. Check JK1206 Replace Jack. Replace Mstar(IC100) Check Mstar LVDS output or Main board 2009 Copyright LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...
  • Page 21 Check AV Cable for damage or open connector. Check JK1206,JK1202 Replace Jack. Replace Mstar(IC100) Check Mstar LVDS output or Main board 2009 Copyright LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...
  • Page 22 Check HDMI Signal If no problem, check signal Replace Main board line. Replace Mstar(IC100) Check Mstar LVDS output or Main board 2009 Copyright LG Electronics. Inc. All right reserved. - 22 - LGE Internal Use Only Only for training and service purposes...
  • Page 23 Replace connector Check Connector & P600 if found to be damaged. Check speaker resistance Replace speaker. and connector damage. 2009 Copyright LG Electronics. Inc. All right reserved. - 23 - LGE Internal Use Only Only for training and service purposes...
  • Page 24 Check SIF buffer signal. Check SIF Signal line. Follow procedure All source audio Replace Mstar(IC100) trouble shooting guide. or Main board 2009 Copyright LG Electronics. Inc. All right reserved. - 24 - LGE Internal Use Only Only for training and service purposes...
  • Page 25 / output Detach the P1400/P1401 FFC Cable - Check Vcom Check URSA2 mini-LVDS output Replace LCD Module P1400, P1401 2009 Copyright LG Electronics. Inc. All right reserved. - 25 - LGE Internal Use Only Only for training and service purposes...

  • Page 26: Block Diagram

    BLOCK DIAGRAM Half-NIM Tuner 2009 Copyright LG Electronics. Inc. All right reserved. - 26 - LGE Internal Use Only Only for training and service purposes...
  • Page 27 IIC Map 2009 Copyright LG Electronics. Inc. All right reserved. - 27 - LGE Internal Use Only Only for training and service purposes...
  • Page 28 T-Con block (non GIP) 2009 Copyright LG Electronics. Inc. All right reserved. - 28 - LGE Internal Use Only Only for training and service purposes...

  • Page 29: Exploded View

    X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Copyright 2009 LG Electronics. Inc. All right reserved. - 29 - LGE Internal Use Only Only for training and service purposes...
  • Page 30 SCHEMATIC DIAGRAM MAIN IC USB DOWN STREAM Copyright 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 IN / OUT F i b e r O p t i c Copyright 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 HDMI Copyright 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 Audio Amp. Copyright 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 34 POWER Copyright 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 TUNER Copyright 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 36 DDR2 Copyright 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 URSA2/FRC IC Copyright 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 38 URSA2 DDR2 IC Copyright 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 39 P-GAMMA/ MINI LVDS DC-DC CONVERTER Copyright 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 40 ETC SUB BOARD I/F USB DOWN STREAM Copyright 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 41 Jan., 2009 P/NO : MFL58436004 Printed in Korea...

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