LG 60LM6450 Service Manual
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LG 60LM6450 Service Manual

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LED LCD TV
SERVICE MANUAL
CHASSIS : LB22E
MODEL : 60LM6450
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67441825 (1208-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
60LM6450-TA
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 60LM6450

  • 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 LCD TV SERVICE MANUAL CHASSIS : LB22E MODEL : 60LM6450 60LM6450-TA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL67441825 (1208-REV00) Printed in Korea...
  • Page 2 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ............... 9 BLOCK DIAGRAM ................. 15 EXPLODED VIEW .................. 16 SCHEMATIC CIRCUIT DIAGRAM .............. - 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 Support HDCP RGB/DVI Audio Audio Input Component SPDIF out SPDIF out For My Media(Movie/Photo/Music List) USB Input or For SVC - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 54.348 60.053 VESA 1360 x 768 @60Hz 47.712 60.015 VESA(WXGA) 1920 x 1080 @60Hz 67.5 WUXGA(CEA 861D) FHD only - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 FHD only(Support to HDMI-PC) 1360 x 768 @60Hz 47.712 60.015 VESA(WXGA) 1920 x 1080 @60Hz 67.5 WUXGA(CEA 861D) FHD only - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 (5) Click "Auto" tab and set as below. 3. After function inspection, Push “In-stop” key. (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 Enter key, Component and RGB are Written and display Success or NG. Not to push the "INSTOP" key after completion if the function inspection. - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 * Push the “IN STOP" key after completing the function inspection. And Mechanical Power Switch must be set “ON”. - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12 ‘Mode In’ Carry the command. EDID data and Automatically adjustment Model option Adjust (The use of a internal pattern) download - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 Technology Group. LG TV 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 (LG TV) (3) Serial number D/L must be conformed when it is produced in production line, because serial number D/L is mandatory by e.
  • Page 14 LED are blinked alternatively. And then automatically turn off. (Must not AC power OFF during blinking) Step 3) Select Start Connection button in Network Connection. - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 BLOCK DIAGRAM - 15 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16 X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 16 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 MID_MAIN_1 2011.12.13 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 MID_MAIN_2 2011.12.09 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 MID_MAIN_3 2011.12.09 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. DDR ONE SIDE Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 2011.11.25 MID_POWER ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 2011.12.12 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MICOM Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 HDMI 4 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 JACK HIGH / MID 2011.11.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 JACK_COMMON 2011.11.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 JACK_COMMON 2011.11.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 IR / KEY 2011.11.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 USB3_HUB_WiFi 2011.10.26 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 MOTION REMOTE 2011.11.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 30 LAN_VERTICAL 2011.12.09 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 2011.11.21 AMP_NEO ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 TUNER 2011.11.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 34 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 LVDS_HIGH_MID 2011.08.11 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 36 LOCAL DIMMING 2011.12.13 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 2011.12.01 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. T-Con Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 38 11.09.29 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 39 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 41 2012 LED/LCD TV Engineering guide...
  • Page 42 Contents of LCD TV Standard Repair Process Error symptom (High category) Error symptom (Mid category) Page Remarks No video/Normal audio No video/No audio Video error, video lag/stop, fail tunning 3, 4 A. Video error Color error Vertical/Horizontal bar, residual image, light spot, external device color error No power B.
  • Page 43 Contents of LCD TV Standard Repair Process Detail Technical Manual Error symptom Content Page Remarks Check LCD back light with naked eye LED driver B+ 24V measuring method A. Video error_ No video/Normal audio Check White Balance value Power Board voltage measuring method TUNER input signal strength checking method A.
  • Page 44 Standard Repair Process Established A. Video error 2010. 12 .14 Error date LCD TV symptom No video/ Normal audio Revised date 1/13 First of all, Check whether all of cables between board is inserted properly or not. (Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,) ☞A1 ☞A4 Replace T-con Board...
  • Page 45 Standard Repair Process Established A. Video error 2010. 12 .14 Error date LCD TV symptom No video/ No audio Revised date 2/13 ☞A4 Check various voltages Check and No Video/ of Power Board Normal replace No audio ( 3.5V,12V,20V or 24V…) voltage? MAIN B/D Replace Power...
  • Page 46 Standard Repair Process Established A. Picture Problem 2010. 12 .14 Error date LCD TV symptom Picture broken/ Freezing Revised date 3/13 . By using Digital signal level meter ☞ A6 . By using Diagnostics menu on OSD ( Menu→ Set up→ Support → Signal Test ) Check RF Signal level - Signal strength (Normal : over 50%) - Signal Quality (Normal: over 50%)
  • Page 47 Standard Repair Process Established A. Picture Problem (DVB-S/S2) 2011. 01 .24 Error date LCD TV symptom Tuning fail, Picture broken/ Freezing Revised date 3/13 ☞ A6 Check RF signal cable (DVB satellite signal or not) Check whether other equipments have problem or not. Check RF Signal level (By connecting RF Cable at other equipment) →...
  • Page 48 Standard Repair Process Established A. Video error 2010. 12 .14 Error date LCD TV symptom Color error Revised date 4/13 ☞A8 ☞ A10/ A11 ※ Check and Check color by input replace Link -External Input Color Cable Color Color -COMPONENT Replace Main B/D Replace module error?
  • Page 49 Standard Repair Process A. Video error Established 2010. 12 .14 Error date LCD TV symptom Vertical / Horizontal bar, residual image, Revised date 5/13 light spot, external device color error Vertical/Horizontal bar, residual image, light spot Replace Module ☞A8 ☞ A10/ A11 ☞...
  • Page 50 Standard Repair Process Established B. Power error 2010. 12 .14 Error date LCD TV symptom No power Revised date 6/13 ☞A17 ☞A19 DC Power on Replace Check Power LED Normal Check Power by pressing Power Key Power Power LED operation? On ‘”High”...
  • Page 51 Standard Repair Process Established B. Power error 2010. 12 .14 Error date LCD TV symptom Off when on, off while viewing, power auto on/off Revised date 7/13 Check outlet ☞A22 Check Power Off Check A/C cord Error? Replace Main B/D Normal? Mode Abnormal...
  • Page 52 Standard Repair Process Established C. Audio error 2010. 12 .14 Error date LCD TV symptom No audio/ Normal video Revised date 8/13 ☞A24 ☞A25 Check user Check audio B+ 24V No audio Normal menu > of Power Board Screen normal voltage Speaker off Cancel OFF...
  • Page 53 Standard Repair Process Established C. Audio error 2010. 12 .14 Error date LCD TV symptom Wrecked audio/ discontinuation/noise Revised date 9/13 → abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio ☞A25 Wrecked audio/ Check and replace Discontinuation/ Check audio speaker and...
  • Page 54 Standard Repair Process D. General Function Problem Established 2010. 12 .14 Error date LCD TV symptom Remote control & Local switch checking Revised date 10/13 1. Remote control(R/C) operating error Replace Main B/D ☞A27 ☞A27 ☞A27 Check & Repair Check R/C itself Normal Normal Check B+ 3.5V...
  • Page 55 Standard Repair Process Established D. Function error 2010. 12 .14 Error date LCD TV symptom External device recognition error Revised date 11/13 Check technical Check External Input information Signal Technical input Replace Main B/D And Component input? - Fix information information? signal Recognition error...
  • Page 56 Standard Repair Process Established E. Noise 2010. 12 .14 Error date LCD TV symptom Circuit noise, mechanical noise Revised date 12/13 Replace PSU(with LED driver) Check location Identify Circuit of noise nose type noise Replace LED driver Mechanical Check location noise of noise ※...
  • Page 57 Standard Repair Process Established F. Exterior defect 2010. 12 .14 Error date LCD TV symptom Exterior defect Revised date 13/13 Zoom part with Module Replace module Adjust VCOM exterior damage damage ☞A28 Cabinet Replace cabinet damage Remote controller Replace remote controller damage Stand Replace stand...
  • Page 58 Contents of LCD TV Standard Repair Process Detail Technical Manual Continued from previous page Error symptom Content Page Remarks Check front display LED Check power input Voltage & ST-BY 5V B. Power error_No power Checking method when power is ON POWER BOARD voltage measuring method B.
  • Page 59 Standard Repair Process Detail Technical Manual Error Established A. Video error_No video/Normal audio 2010. 12 .14 symptom date LCD TV Revised Content Check White Balance value date Entry method Entry method 1. Press the ADJ button on the remote controller for adjustment. 1.
  • Page 60 Standard Repair Process Detail Technical Manual Error Established A. Video error_No video/ Audio 2010. 12 .14 symptom date LCD TV Revised Content Power Board voltage measuring method date Check the DC 24V, 12V, 3.5V. 24 Pin (Power Board ↔ Main Board) – Common Edge LED SMAW200-H24S (YEONHO)
  • Page 61 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop 2010. 12 .14 symptom date LCD TV Revised TUNER input signal strength checking method Content date MENU - Set up support - signal test select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.)
  • Page 62 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop 2010. 12 .14 symptom date LCD TV Revised LCD-TV Version checking method Content date 1. Checking method for remote controller for adjustment Version Press the IN-START with the remote controller for adjustment...
  • Page 63 Standard Repair Process Detail Technical Manual Error A. Video error _Vertical/Horizontal bar, residual Established 2010. 12 .14 symptom date image, light spot LCD TV Revised Content LCD TV connection diagram (1) date As the part connecting to the external input, check the screen condition by signal...
  • Page 64 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop 2010. 12 .14 symptom date LCD TV Revised TUNER checking part Content date Checking method: 1. Check the signal strength or check whether the screen is normal when the external device is connected. 2.
  • Page 65 Standard Repair Process Detail Technical Manual Error Established A. Video error_Color error 2010. 12 .14 symptom date LCD TV Revised Adjustment Test pattern - ADJ Key Content date You can view 6 types of patterns using the ADJ Key Checking item : 1. Defective pixel 2.
  • Page 66 Appendix : Exchange T-Con Board (1) Solder defect, CNT Broken Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, Short/Crack Solder defect, Short/Crack...
  • Page 67 Appendix : Exchange T-Con Board (2) Abnormal Power Section Abnormal Power Section Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack Noise GRADATION GRADATION...
  • Page 68 Appendix : Exchange PSU(LED driver) No Light Dim Light Dim Light Dim Light No picture/Sound Ok...
  • Page 69 Appendix : Exchange the Module (1) Panel Mura, Light leakage Panel Mura, Light leakage Press damage Crosstalk Press damage Crosstalk Un-repairable Cases In this case please exchange the module. Press damage...
  • Page 70 Appendix : Exchange the Module (2) Vertical Line Vertical Block Vertical Block Source TAB IC Defect Source TAB IC Defect Source TAB IC Defect Horizontal Block Horizontal line Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Un-repairable Cases...
  • Page 71 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power 2010. 12 .14 symptom date LCD TV Revised Content Check front display LED date Front LED control : Menu Option Power Indicator Standby light ON ST-BY condition: Red Power ON condition: white...
  • Page 72 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power 2010. 12 .14 symptom date LCD TV Revised Content Check power input voltage and ST-BY 5V date For ’10 models, there is no voltage out for st-by purpose. When st-by, only 3.5V is normally on.
  • Page 73 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power 2010. 12 .14 symptom date LCD TV Revised Content Checking method when power is ON date Check “power on” pin is high 24 Pin (Power Board ↔ Main Board) - Common SMAW200-H24S (YEONHO) Edge LED...
  • Page 74 Standard Repair Process Detail Technical Manual Error Established B. Power error _Off when on, off whiling viewing 2010. 12 .14 symptom date LCD TV Revised Content POWER OFF MODE checking method date Entry method 1. Press the IN-START button of the remote controller for adjustment 2.
  • Page 75 Standard Repair Process Detail Technical Manual Error Established C. Audio error_No audio/Normal video 2010. 12 .14 symptom date LCD TV Revised Content Checking method in menu when there is no audio date Checking method 1. Press the MENU button on the remote controller 2.
  • Page 76 Standard Repair Process Detail Technical Manual Error Established C. Audio error_No audio/Normal video 2010. 12 .14 symptom date LCD TV Revised Voltage and speaker checking method Content date when there is no audio 24 Pin (Power Board ↔ Main Board) - Common ①...
  • Page 77 Standard Repair Process Detail Technical Manual Error D. Function error_ No response in remote controller, Established 2010. 12 .14 symptom key error date LCD TV Revised Content Remote controller operation checking method date P4102 KEY1 KEY2 ③ St 3.5V RED_LED ④...
  • Page 78 Standard Repair Process Detail Technical Manual Error Established D. VCOM Adjustment 2010. 12 .14 symptom date LCD TV Revised Content Sequence of the Vcom adjustment date 1. Case ■ LCD module change ■ T-Con board change 2. Equipment ■ Service Remote controller 3.