Download
Share
Print this page
LG 50LF6090 Service Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. LED TV
  5. 50LF6090
  6. Service manual
LG 50LF6090 Service Manual

LG 50LF6090 Service Manual

Hide thumbs Also See for 50LF6090:

Advertisement

Quick Links

Download this manual
LED TV
SERVICE MANUAL
CHASSIS : LA46H
MODEL : 50LF6100
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL69121001 (1504-REV01)
North/Latin America
Europe/Africa
Asia/Oceania
50LF6090
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
50LF6100-UA
50LF6090-UB
Printed in Korea

Advertisement

loading

Related Manuals for LG 50LF6090

Summary of Contents for LG 50LF6090

  • Page 1 North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LED TV SERVICE MANUAL CHASSIS : LA46H MODEL : 50LF6100 50LF6100-UA MODEL : 50LF6090 50LF6090-UB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL69121001 (1504-REV01) Printed in Korea...
  • Page 2 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ..............8 BLOCK DIAGRAM .................. 16 EXPLODED VIEW .................. 17 SCHEMATIC CIRCUIT DIAGRAM ........... APPENDIX - 2 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 3 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 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 HDTV 1080P 1920*1080 26.97 23.97 74.176 HDTV 1080P 1920*1080 33.75 30.000 74.25 HDTV 1080P 1920*1080 33.716 29.976 74.176 HDTV 1080P - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 (2) Manual adjustment for ADC calibration and White balance. (3) Shipment conditions, Channel pre-set 4.2.6. Inspection - In INSTART menu, check these keys. - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 ⓓ Model Name(Hex): LGTV Chassis MODEL NAME(HEX) LA46H 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 ⓔ Checksum(LG TV): Changeable by total EDID data. ⓔ1 ⓔ2 ⓔ3 4.4. EDID Download HDMI1 4.4.1 Overview...
  • Page 10 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 LA46H 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 ⓔ Checksum(LG TV): Changeable by total EDID data. ⓔ Checksum(LG TV): Changeable by total EDID data. ⓔ1 ⓔ2...
  • Page 11 RS -232C Pat t ern Generat o r Signal Source * If TV internal pattern is used, not needed - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12 Coordinate Mode Temp △uv Cool 0.271±0.002 0.270±0.002 13,000K 0.0000 Medium 0.286±0.002 0.289±0.002 9,300K 0.0000 Warm 0.313±0.002 0.329±0.002 6,500K 0.0000 - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 (3) Check the Sound from the Speaker or using AV & Optic TEST program (It’s connected to MSHG-600) - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 (1) Measurement practical Vrms condition max Output, - EQ/AVL/Clear Voice: Off (Distor- (2) Speaker (8Ω tion=10% Impedance) max Output) - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 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. - 15 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16 BLOCK DIAGRAM - 16 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 X-RADIATION, 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 MID_MAIN_3 2011.12.09 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 19 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. DDR ONE SIDE LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 20 JACK HIGH / MID 2011.11.21 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 21 IR / KEY 2011.11.21 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 22 JACK_COMMON 2011.11.21 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 2011.11.21 AMP_NEO 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 24 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 right reserved. Only for training and service purposes...
  • Page 25 LOCAL DIMMING 2011.12.13 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 26 11.09.29 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 27 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 right reserved. Only for training and service purposes...
  • Page 28 MID_MAIN_1 2013.07.16 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 MID_MAIN_2 2013.07.16 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 30 2011.11.25 MID_POWER 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 31 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MICOM (RENESAS) LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 32 HDMI 4 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 33 14Y Phone Jack 2013.08.27 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 34 USB2_USB3 2013.11.25 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 35 LAN_VERTICAL 2013.11.26 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 36 TUNER 2013.07.16 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 37 TUNER_CIRCUIT 2013.07.16 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 38 LVDS_HIGH_MID 2013.07.16 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 40 Power Off History 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 right reserved. 1 / 97 Only for training and service purposes...
  • Page 41 Exchange LED driver Board (PSU) A-3/5 Other : PSU 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 right reserved. 2 / 97 Only for training and service purposes...
  • Page 42 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 right reserved. 3 / 97 Only for training and service purposes...
  • Page 43 No Video/ replace voltage? ( 3.5V,12V or 24V…) No audio MAIN B/D Replace Power Board and repair parts LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 4 / 97 Only for training and service purposes...
  • Page 44 Contact with signal distributor Tuner soldering Picture? or broadcaster (Cable or Air) Normal Picture? Replace Main B/D Close Close LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 5 / 97 Only for training and service purposes...
  • Page 45 Request repair for external device/cable Check external External device HDMI/DVI device and /Cable Replace Main B/D error cable normal LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 6 / 97 Only for training and service purposes...
  • Page 46 (Check normal operation of normal? Main B/D External Input, Component, AV and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 7 / 97 Only for training and service purposes...
  • Page 47 ※ Normal Replace Main B/D voltage? Close Normal Check ST-BY 3.5V voltage? ☞A18 Replace Power B/D Replace Power LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 8 / 97 Only for training and service purposes...
  • Page 48 * Please refer to the all cases which can be displayed on power off mode. Click the below Hyper_link LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 9 / 97 Only for training and service purposes...
  • Page 49 Change the TV Speaker Replace Power Board and repair parts Check Speaker Disconnection Replace MAIN Board disconnection Replace Speaker / Cable LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 10 / 97 Only for training and service purposes...
  • Page 50 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 right reserved. 11 / 97 Only for training and service purposes...
  • Page 51 If R/C operate, Normal Close Explain the customer operating? cause is interference from light in room. Replace R/C LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 12 / 97 Only for training and service purposes...
  • Page 52 Check and fix DVI, Optical Replace Main B/D Fix in external device/cable Recognition error accordance with technical information LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 13 / 97 Only for training and service purposes...
  • Page 53 “Part related to nose” in the Owner’s Manual. as shown in the solution manual (For models without any fix information, provide the description) LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 14 / 97 Only for training and service purposes...
  • Page 54 ☞A28 Cabinet Replace cabinet damage Remote controller Replace remote controller damage Stand Replace stand dent LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 15 / 97 Only for training and service purposes...
  • Page 55 D. Function error_ No response in remote Remote controller operation checking method controller, key error D. VCOM Adjustment Sequence of the Vcom adjustment LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 16 / 97 Only for training and service purposes...
  • Page 56 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. enter the value after replacing the MAIN BOARD. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 17 / 97 Only for training and service purposes...
  • Page 57 - 24Pin wafer is applied operating L/D at power and main B/D - 18Pin wafer is applied not operating L/D at power and main B/D LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 18 / 97 Only for training and service purposes...
  • Page 58 - 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 right reserved. 19 / 97 Only for training and service purposes...
  • Page 59 1. Checking method for remote controller for adjustment Version Press the IN-START with the remote controller for adjustment LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 20 / 97 Only for training and service purposes...
  • Page 60 LCD TV connection diagram (1) 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 right reserved. 21 / 97 Only for training and service purposes...
  • Page 61 2. After measuring each voltage from power supply, finally replace the MAIN BOARD.( with Main to Power Cable, Speaker Cable and LVDS or EPI Cable) LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 22 / 97...
  • Page 62 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 right reserved. 23 / 97 Only for training and service purposes...
  • Page 63  Brightness and Duration ST-BY condition: Red or Logo Light ON Power ON condition: OFF or User Settings LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 24 / 97 Only for training and service purposes...
  • Page 64 - 24Pin wafer is applied operating L/D at power and main B/D - 18Pin wafer is applied not operating L/D at power and main B/D LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 25 / 97 Only for training and service purposes...
  • Page 65 - 24Pin wafer is applied operating L/D at power and main B/D - 18Pin wafer is applied not operating L/D at power and main B/D LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 26 / 97 Only for training and service purposes...
  • Page 66 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 right reserved. 27 / 97 Only for training and service purposes...
  • Page 67 1. Press the MENU button on the remote controller 2. Select the SOUND function of the Menu 3. Select TV Speaker from Others LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 28 / 97 Only for training and service purposes...
  • Page 68 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 right reserved. 29 / 97 Only for training and service purposes...
  • Page 69 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 right reserved. 30 / 97 Only for training and service purposes...
  • Page 70 ■ Push the OK key to store the value. Then the message “Saving OK” is pop. ■ Press the exit key to finish V-COM adjustment. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 31 / 97 Only for training and service purposes...
  • Page 71 POWER_OFF_BY_MCU Abnormal for 15 sec. POWER_OFF_BY_1SEC_POWER_OFF POWER_OFF_BY_MCU Abnormal status with Power Off Key POWER_OFF_BY_20VMNT POWER_OFF_BY_abnormal Panel status (Only OLED) LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 32 / 97 Only for training and service purposes...
  • Page 72 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 right reserved. 33 / 97 Only for training and service purposes...
  • Page 73 Abnormal Power Section Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack GRADATION Noise GRADATION LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 34 / 97 Only for training and service purposes...
  • Page 74 Appendix : Exchange PSU(LED driver) No Light Dim Light Dim Light Dim Light No picture/Sound Ok LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 35 / 97 Only for training and service purposes...
  • Page 75 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 right reserved. 36 / 97 Only for training and service purposes...
  • Page 76 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 right reserved. 37 / 97 Only for training and service purposes...

This manual is also suitable for:

50lf610050lf6100-ua50lf6090-ub