LG 43LF5900-CB Service Manual
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LG 43LF5900-CB Service Manual

Chassis : lc50h
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LED TV
SERVICE MANUAL
CHASSIS : LC50H
MODEL : 43LF5900
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL69285102 (1508-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
43LF5900-CB
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea

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  • 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 : LC50H MODEL : 43LF5900 43LF5900-CB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL69285102 (1508-REV00) Printed in Korea...
  • Page 2 ADJUSTMENT INSTRUCTION ............... 9 BLOCK DIAGRAM ................. 15 EXPLODED VIEW .................. 19 SCHEMATIC CIRCUIT DIAGRAM ........... APPENDIX TROUBLE SHOOTING GUIDE ..........APPENDIX - 2 - Copyright © LG Electronics. Inc. All rights reserved. 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. - 3 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 4: Servicing Precautions

    - 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

    Analog audio out (1EA) Headphone and External speaker out Rear USB Input(3EA) For My Media(Movie/Photo/Music List) or For SVC Ethernet Lan Jack - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 7: Cvbs Input

    HDTV 1080I 1920*1080 56.25 50.00 148.50 HDTV 1080P 1920*1080 67.43 59.94 148.50 HDTV 1080P 1920*1080 67.50 60.00 148.50 HDTV 1080P - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 8: Dtv Mode

    60.01 84.75 VESA(WXGA) 1152*864 54.34 60.05 80.00 VESA 1280*1024 63.98 60.02 109.00 SXGA 1920*1080 67.50 60.00 158.40 WUXGA(Reduced Blanking) - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 9: Adjustment Instruction

    Widevine → HDCP14 → HDCP20 ▪ Play: Press Enter key ▪ Result: Ready, Test, OK or NG ▪ Printer Out (MAC Address Label) - 9 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 10: Manual Adjustment

    00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 1) Press the "Instart" key of Adjustment remote control. 2) Go to the menu "7.Model Number D/L" like below photo. ⓔ Checksum(LG TV): Changeable by total EDID data. 3) Input the Factory model name(ex 47LB650V-ZA) or Serial ⓔ2 ⓔ2...

  • Page 11: White Balance Adjustment

    - VAL: FOS Data value - CS: Checksum of sent data - A: Acknowledge Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX] - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12 Medium 0.286 ± 0.002 0.289 ± 0.002 9300 K 0.0000 Warm 0.313 ± 0.002 0.329 ± 0.002 6500K 0.0000 - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 Stand-by mode. * Remark: Inspect in Power Only Mode and check SW version in a master equipment - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 (2) Select "Tool Option 1" and push "OK" key. (3) Punch in the number. (Each model has their number) - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: Block Diagram

    BLOCK DIAGRAM 1. MTK(A5LR) - 15 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16 2. I2C - 16 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 3. TUNER / CI - 17 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 4. POWER - 18 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 19: Exploded View

    Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 19 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 2014.11.01 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MAIN1 LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 21 A5LR_Bring_Up ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MAIN2 LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 22 2014.11.01 A5LR_Bring_Up 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 rights reserved. Only for training and service purposes...
  • Page 23 2014.11.01 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. POWER LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 24 2014.11.01 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MICOM LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 25 2014.11.01 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR HDMI THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 26 2014.11.01 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR JACK THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 27 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. IR / KEY / WIFI LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 28 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 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 rights reserved. Only for training and service purposes...
  • Page 29 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR ETHERNET THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 30 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR AUDIO AMP THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 31 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR EARPHONE AMP THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 32 2014.11.01 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. TUNER_1 LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 33 2014.11.01 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. TUNER_2 LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 34 2014.11.01 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LVDS LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 35 2014.11.01 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. eMMC LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 36 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR RS232C THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...

  • Page 38: Troubleshooting Guide

    Trouble shooting guide LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 39 Circuit noise, mechanical noise F. Exterior error Exterior defect First of all, Check whether there is SVC Bulletin in GCSC System for these model. LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 40 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 41 Check voltages of Check and No Video/No audio Power Board Normal replace ( D13V,A13V) voltage? MAIN B/D Replace Power Board and repair parts LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 42 2. Install Booster S/W Upgrade Replace Normal Contact with signal distributor or broadcaster (Cable or Air) Main B/D Picture? Normal Picture? Close Close LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 43 Request repair for external device/cable Check external External HDMI device and Replace Main B/D device/Cable error cable normal LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 44 (Check normal operation of External Input, Component Replace Screen HDMI and HDMI by connecting Jig, Main B/D normal? pattern Generator ,Set-top Box etc. LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...

  • Page 45: Power Error

    Measure voltage of each output of Power B/D Normal? ※ Normal Replace Main B/D voltage? Check ST-BY Voltage Close Normal (D13V) voltage? ☞A18 Replace Power B/D Replace Power LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 46 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 47 Speaker off Cancel OFF Replace Power Board and repair parts Check Speaker Replace MAIN Board Disconnection disconnection Connect Speaker to Main cable LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 48 Input signal error) Connect and check Normal Check and fix other external device audio? external device Check and fix external device LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...

  • Page 49: Function Error

    Replace Main B/D (Power B/D don’t have problem) If R/C operate, Explain the customer Replace R/C cause is interference from light in room. LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 50 - S/W Version HDMI/ Check and fix Optical Recognition Replace Main B/D Fix in external device/cable error accordance with technical information LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 51 Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote Replace remote control control damage Stand Replace stand dent LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 52 ※ Describe the basis of the description in (For models without any fix information, provide “Part related to noise” in the Owners Manual. the description) LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 53 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 54 Normal Remote control operation checking method D. Function error_ No response in remote control Motion Remote control operation checking method LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 55 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 56 (Power Board ↔ Main Board) - 12 Pin Common SMAW200-H12S5K Power on PDIM #2 D13V D13V D13V A13V A13V DRV_ON PDIM #1 LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 57 Menu(QUICK SETTING)  Channels Channel Tuning  Manual Tuning  Antenna DTV 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 58 <ALL MODELS> 1. Checking method for remote control for adjustment Version 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 59 Connection diagram 2015. 04 .23 date <ALL MODELS> As the part connecting to the external input, check the screen condition by signal LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 60 1. Check the signal strength or check whether the screen is normal when the external device is connected. 2. After measuring each voltage from power supply, finally replace the MAIN BOARD. LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 61 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 62 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 63 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 64 Appendix : Exchange LED driver Board(PSU) A-3/5 No Light Dim Light Dim Light Dim Light No picture/Sound Ok LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 65 Panel Mura, Light leakage Press damage Crosstalk Press damage Crosstalk Un-repairable Cases In this case please exchange the module. Press damage LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 66 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 67 2015. 04 .23 date ST-BY condition: On Power ON condition: Off ※ Be careful : LF59 Models have a Standby Light Control UI LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 68 (Power Board ↔ Main Board) - 12 Pin Common SMAW200-H12S5K Power on PDIM #2 D13V D13V D13V A13V A13V DRV_ON PDIM #1 LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 69 Entry method 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 70 1. Press the MENU button on the remote control 2. Select the Sound function of the Menu 3. Select Sound Out function of the Menu LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 71 ③ 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 © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 72 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...
  • Page 73 1, 2. Check IR cable condition between IR & Main board. 3. Check the 3.5V_WIFI on the terminal 2. 4. Check the B/T version value. ④ LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...

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