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LG 43LF5100 Service Manual
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LG 43LF5100 Service Manual

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LED TV
SERVICE MANUAL
CHASSIS : LJ55A
MODEL : 43LF5100
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL68606519 (1505-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
49LF5100
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
43LF5100-SA
49LF5100-SA
Printed in Korea

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Summary of Contents for LG 43LF5100

  • Page 1 Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LED TV SERVICE MANUAL CHASSIS : LJ55A MODEL : 43LF5100 43LF5100-SA 49LF5100 49LF5100-SA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL68606519 (1505-REV00) Printed in Korea...

  • Page 2: Table Of Contents

    ADJUSTMENT INSTRUCTION ..............9 DISASSEMBLY ..................15 BLOCK DIAGRAM ................... 16 EXPLODED VIEW .................. 17 SCHEMATIC CIRCUIT DIAGRAM ..........APPENDIX TROUBLESHOOTING ...............APPENDIX - 2 - Copyright © LG Electronics. Inc. All rights reserved. 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. - 3 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 4 - 4 - Copyright © LG Electronics. Inc. All rights reserved. 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. - 5 - Copyright © LG Electronics. Inc. All rights reserved. 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 % - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 3840 x 2160 (UF67 ONLY) 54.0 24.00 297.00 4096 x 2160 (UF67 ONLY) 53.95 23.97 296.703 4096 x 2160 (UF67 ONLY) 24.00 297.00 - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 Max Vertical Freq - 62 Hz Min Horiz. Freq - 30 kHz Max Horiz. Freq - 83 kHz Pixel Clock - 160 MHz - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 9: Adjustment Instruction

    5) Click “Auto” tab and set as below. 6) Click “Run”. 7) After downloading, check “OK” message. filexxx.bin (7)...OK - 9 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 In this case, you have to channel recover. If all channel data is cleared, you didn't have a DTV/ATV test on production line. - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 81-119 - Using ‘no signal’ or ‘full white pattern’ or the others, check Over 120 the back light on. - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12 (iii). If R gain or B gain is over 255, Readjust G gain less than 172, Conform to R gain is 255 or B gain is 255 - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 Physical Address Remark (0xFF) (0x1E) HDMI 1 74 / 5B LF51 has Only HDMI1 HDMI 2 74 / 4B - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 NEUTRAL. ② 2 Poles - Hi-pot Test = Accessible Metal and LIVE & NEUTRAL. 4) LEAKAGE CURRENT: At 0.5mArms - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: Disassembly

    DISASSEMBLY - 15 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 16: Block Diagram

    BLOCK DIAGRAM - 16 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 17: Exploded View

    Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 17 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 150112 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR POWER THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 19 150112 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR LED_DRIVER THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 20 150112 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR USB_S1 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 21 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR HDMI_R1S1 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 22 L14_CA_M1A 2014/06/13 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 23 140721 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR S_FLASH THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 24 L14_CA_M1A ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR TUNER_CSA THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 25 140613 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR LVDS THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 26 2015/02/27 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. COMPONENT LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 27 2014/05/22 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR RS232C_MSTAR_DEBUG_4P THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 28 L15.5_CI_M1A 2015/01/12 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 29 L15.5_CI_M1A ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MAIN1_DVB LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 30 150511 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR MAIN2_DVB THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 31 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR AMP_NTP THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 33 Trouble shooting guide LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 34 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 35 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 36 ☞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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 37 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 38 Contact with signal S/W Upgrade Replace satellite setting distributor (match with installed ANT) or broadcaster (Cable or Air) Normal Normal Picture Picture LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 39 External Input Component, Check Test pattern device and Replace Main B/D device/Cable HDMI error cable Normal Request repair for external device/cable LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 40 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 41 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 42 Power off by unknown status except listed case Power off by abnormal status except CPU trouble "POWEROFF_ABNORMAL1" Abnormal Power off by CPU Abnormal "POWEROFF_CPUABNORMAL" LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 43 Connection Replace Speaker Connec Screen normal from Main  or Main B/D tion Speaker Cable Insert wafer SPK Cable Normal Audio LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 44 (When RF signal is not received) Request repair to external cable/ANT provider (In case of External Input signal error) Check and fix external device LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 45 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 46 - Fix information Recognition error - S/W Version Fix in HDMI accordance Check and fix Recognition with technical external device/cable information error LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 47 “Part related to nose” in the Owner’s Manual. (For models without any fix information, provide the description) LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 48 Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote Replace remote control Control damage Stand Replace stand damage LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 49 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 50 Checking method in menu when there is no audio D. Function error_ No response in remote Remote control operation checking method controller, key error LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 51 Established date 2015.04.17 Content Check Back Light On with Naked eye Revised date Power On -> disjoint back case -> check lighting LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 52 2015.04.17 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 53 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 54 Power Voltage Measuring Method Revised date HD Model : 27 ~ 30 pin FHD Model : 48 ~ 51 pin Check LVDS 12V LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 55 MENU  Press red key Remote controller  signal test  Select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 56 TV Version Checking Method Revised date Checking SW version method for remote controller for adjustment Press the IN-START with the remote control for adjustment LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 57 As the part connecting to the external input, check the screen condition by signal * Jack spec. : depending on Model LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 58 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 59 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 60 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 61 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 62 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 63 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 64 Check front Display LED Revised date ST-BY condition: Red Front LED control : Menu  Option  Standby Light  On/Off LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 65 B. Power Error, No Power Established date 2015.04.17 A12/ Content Checking Method When Power is ON Revised date Check Voltage 19V of Adaptor Power LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 66 Revised date 1. Press the IN-START button of the remote controller for adjustment 2. Check the entry into adjustment item 3 LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 67 Established date 2015.04.17 Content Checking method in menu when there is no audio Revised date Check Connection from Main B/D to Speaker LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 68 4. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog Tester needle moves slowly, and defective when it does not move at all. LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...

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