LG 55LH50-UC Service Manual
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LG 55LH50-UC Service Manual

LG 55LH50-UC Service Manual

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LCD TV
SERVICE MANUAL
CHASSIS : LA91L
MODEL : 55LH50
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL58600440 (0907-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
55LH50-UC
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea

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Summary of Contents for LG 55LH50-UC

  • 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 : LA91L MODEL : 55LH50 55LH50-UC CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL58600440 (0907-REV00) Printed in Korea...
  • Page 2 CONTENTS ....................2 PRODUCT SAFETY ..................3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ..............9 TROUBLE SHOOTING ................16 EXPLODED VIEW .................. 25 SVC. SHEET ....................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

    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 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. Copyright LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Application Range

    2) Humidity : ~ 85 % 4.2 EyeQ-Green Motion Characters. Ambient Calculative Sensor Backlight UI Contrast Brightness Sharpness Color Illumination Illumination Copyright LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...

  • Page 7: Component Video Input

    12. 1920*1080 26.97 23.976 74.176 HDTV 1080P 13. 1920*1080 33.75 30.000 74.25 HDTV 1080P 14. 1920*1080 33.71 29.97 74.176 HDTV 1080P Copyright LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 HDTV 1080P 1920*1080 26.97 23.976 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 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...

  • Page 9: Application Object

    - xb 00 60 [Change input source to RGB(1024*768)] • ISP Download(Option) - ad 00 10 [Adjust 1024*768 RGB] - ad 00 90 End adj. Copyright LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 4.2.2.3 Input the ESN Key • download Model sending Key file • input by 1 by SET so as not to be duplicated Copyright LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...

  • Page 11: Manual Adjustment

    If ADC calibration is failure, “ADC RGB Fail” is displayed. 6) If ADC calibration is failure, after recheck ADC pattern or condition retry calibration. Error message refer to Copyright LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 • HDMI III [C/S: 1DAA] Caution) When EDID download, must remove RGB/HDMI cable EDID Block 0 table = EDID Block 1 table = Copyright LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 00 1f -> Gain adj. complete *(wb 00 20(start), wb 00 2f(end)) -> Off-set adj. wb 00 ff -> End white balance auto adj. Copyright LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...

  • Page 14: Hdcp Setting

    Adj. menu 6.White Balance, you can select one of 2 Test-pattern: ON, OFF. Default is inner(ON). By selecting OFF, you can adjust using RF signal in 216 Gray pattern. Copyright LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 1) Push "IN-START" key in service remote controller. 2) Select "Tool Option 1" and Push “OK” button. 3) Punch in the number. (Each model has their number.) Copyright LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...

  • Page 16: Troubleshooting

    P2400 20pin : high Check IC2404 output Replace IC2404 voltage 3.3V Check LVDS output Replace BCM3549 R1114,R1115..R1125 (IC100) or Main board Copyright LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 Check IC2502 TU2500 4Pin Check CVBS signal. Replace Tuner. TU2500 #19 Pin Replace BCM3549 Check LVDS output (IC100)or Main board Copyright LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...

  • Page 18: Component Video

    Check signal R/G/B/H/V- If no problem, check Sync C618,C619,C620 signal line. Replace BCM3549 Check LVDS output (IC100) or Main board Copyright LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...

  • Page 19: Hdmi Video

    Check other set. If no Check HDMI Signal Replace Main board problem, check signal Replace BCM3549 Check LVDS output (IC100) or Main board Copyright LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
  • Page 20 IC2301 Check Connector & Replace connector P2300 if found to be damaged. Check speaker resistance Replace speaker. and connector damage. Copyright LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...
  • Page 21 IC2301 Check Connector & Replace connector P2300 if found to be damaged. Check speaker resistance Replace speaker. and connector damage. Copyright LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...
  • Page 22 (Check Lamp blinking) (2.5V Power) Resetting IP Check IP Setting (Auto or Manual) Function Execution Ask to Yahoo!/Netfix CS. (Yahoo!/Netfix) Copyright LG Electronics. Inc. All right reserved. - 22 - LGE Internal Use Only Only for training and service purposes...
  • Page 23 4 HDMI In Switch (TDA9996HL) UART RESET Reset IC RS-232C Reset IC (KIA7029) MiCom (MAX3232) (KIA7029) (MTV416) EEPROM To IR Board Debug Port Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 24: Exploded View

    X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Copyright LG Electronics. Inc. All right reserved. LGE Internal Use Only - 25 - Only for training and service purposes...

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