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LG 24LH4830 Service Manual
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LG 24LH4830 Service Manual

LG 24LH4830 Service Manual

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LED TV
SERVICE MANUAL
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO :
MFL69169557 (1609-REV00)
LU70A
24LH4830
Internal Use Only
24LH4830-PU

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Summary of Contents for LG 24LH4830

  • Page 1 Internal Use Only LED TV SERVICE MANUAL CHASSIS : LU70A MODEL : 24LH4830 24LH4830-PU CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL69169557 (1609-REV00)

  • Page 2: Table Of Contents

    SPECIFICATION ..................6 USB S/W DOWNLOAD ................9 BLOCK DIAGRAM .................. 10 EXPLODED VIEW .................. 11 TROUBLESHOOTING GUIDE ..........APPENDIX 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

    Copyright © LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 1. Clip each fuse or resistor lead at top of the circuit board hollow stake. 2. Securely crimp the leads of replacement component around notch at stake top. 3. Solder the connections. Copyright © LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Specification

    2) Humidity : ~ 80 % Storage Environment 1) Temp : -20 ~ 60 deg 2) Humidity : ~ 85 % Copyright © LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 HDTV 1080P 1920*1080 26.97 23.97 74.176 HDTV 1080P 1920*1080 33.75 30.00 74.250 HDTV 1080P 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 33.75 30.00 79.20 HDTV 1080P 1920*1080 67.43 59.94 148.350 HDTV 1080P 1920*1080 67.50 60.00 148.50 HDTV 1080P Copyright © LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...

  • Page 9: Usb S/W Download

    2) Select "Tool Option 1" and push "OK" key. 3) Punch in the number. (Each model has their number) Copyright © LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...

  • Page 10: Block Diagram

    BLOCK DIAGRAM Copyright © LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...

  • Page 11: Exploded View

    Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Copyright © LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...

  • Page 13: Troubleshooting Guide

    TROUBLE SHOOTING GUIDE LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 14 Remote control & Local switch checking D. Function error External device recognition error E. Noise Circuit noise, mechanical noise F. Exterior error Exterior defect LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 15 Always check & record S/W Version and White Replace Main Board Re-enter White Balance value Balance value before replacing the Main Board LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 16 ☞A13 No video / Check voltage 19V Normal Replace Main No audio of Adaptor Voltage B/D or Repair parts Replace Adaptor LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 17 2. Install Booster Replace S/W Upgrade Normal Contact with signal distributor Main B/D Picture or broadcaster (Cable or Air) Normal Picture LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 18 Compon device/ Check Test pattern device and Replace Main B/D ent, Cable cable HDMI Normal error Request repair for external device/cable LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 19 HDMI by connecting HDMI) Jig, pattern Generator, Set-top Box etc. S/W Upgrade Request repair for external device Normal Screen LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 20 Power cord was inserted properly Power LED On ※ ☞A16 Normal Check ST-BY 3.5V Voltage Replace Adaptor or Replace Main B/D LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 21 Power off by unknown status except listed case "POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble Abnormal "POWEROFF_CPUABNORMAL" Power off by CPU Abnormal LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 22 Connection Replace Speaker Connec from Main  Screen normal or Main B/D tion Speaker Cable Insert wafer SPK Cable Normal Audio LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 23 Request repair to external Audio cable/ANT provider (In case of External Input Check and fix external device signal error) Check and fix external device LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 24 Baterry of R/C in room If R/C operate, Explain the customer Normal cause is interference Operating from light in room. Replace R/C LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 25 - Fix information information Recognition error - S/W Version Fix in Check and fix accordance HDMI external device/cable with technical Recognition error information LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 26 “Part related to nose” in the Owner’s Manual. shown in the solution manual (For models without any fix information, provide the description) LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 27 Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote control Replace remote control damage Stand Replace stand damage LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 28 Exchange LED driver Board (PSU) A-3/5 Defected Type caused by T-Con/ Inverter/ Module Exchange Module itself (1) A-4/5 Exchange Module itself (2) A-5/5 LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 29 C. Audio error_No audio/Normal video audio D. Function error_ No response in remote Remote control operation checking method control, key error LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 30 Established date Content Check Back Light On with Naked eye Revised date Power On -> disjoint back case -> check lighting LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 31 Established date Content Main Board to LED back light Voltage Revised date Measure DC Voltage applying to LED backlight from Main B/D LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 32 3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm), re-enter the value after replacing the MAIN BOARD LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 33 A. Video Error, No Video/Normal Audio Established date Content Power Voltage Measuring Method Revised date HD Model : 27 ~ 30 pin Check LVDS Voltage 12V LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 34 Revised date Setting  Channels Manual Tuning Select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 35 Version Checking Method Revised date Checking SW version method for remote control for adjustment Press the IN-START with the remote control for adjustment LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 36 As the part connecting to the external input, check the screen condition by signal * Jack spec. : depending on Model LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 37 Check and replace Link Cable(LVDS) and contact condition Revised date 1. Check and replace LVDS Cable 2. Check LVDS connection condition LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 38 Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..) 4.Video error (Classification of MODULE or Main-B/D) LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 39 Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, Short/Crack Solder defect, Short/Crack LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 40 Abnormal Power Section Abnormal Power Section Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack Noise GRADATION GRADATION LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 41 Appendix : Exchange the Module (1) Press damage Press damage Press damage Un-repairable Cases In this case please exchange the module. Crosstalk Crosstalk LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 42 Gate TAB IC Defect Un-repairable Cases In this case please exchange the module. Horizontal Block Gate TAB IC Defect Gate TAB IC Defect LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 43 Check front Display LED Revised date ST-BY condition: Red Front LED control : Setting  Option  Standby Light  On/Off LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 44 B. Power Error, No Power Established date A12/ Content Checking Method When Power is ON Revised date Check Voltage 19V of Adaptor Power LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 45 Revised date 1. Press the IN-START button of the remote control for adjustment 2. Check the entry into adjustment item 3 LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 46 < Sub Ass’y> < Main Ass’y> ② 1, 2. Check IR cable condition between IR & Main board 3. Check the 3.4V_ST Voltage LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 47 2. Connect the tester RX1 to the speaker terminal and if you hear the “Chik Chik” sound when you touch the GND and output terminal, the speaker is normal. LGE Internal Use Only Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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24lh4830-pu