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LG 32LB5650 Service Manual
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LG 32LB5650 Service Manual

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LED TV
SERVICE MANUAL
CHASSIS : LB43Q
MODEL : 32LB5650
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67982527 (1506-REV01)
North/Latin America
Europe/Africa
Asia/Oceania
32LF565B
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
32LB5650-TO
32LF565B-TG
Printed in Korea

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Summary of Contents for LG 32LB5650

  • 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 : LB43Q MODEL : 32LB5650 32LB5650-TO 32LF565B 32LF565B-TG CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL67982527 (1506-REV01) Printed in Korea...
  • Page 2 ADJUSTMENT INSTRUCTION ............... 8 BLOCK DIAGRAM .................. 14 EXPLODED VIEW .................. 15 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 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 HDMI2-DTV/MHL SPDIF out SPDIF out Except 32”HD model USB Input For My Media(Movie/Photo/Music List) and SVC Headphone - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 FHD only(Support to HDMI-PC) 1360*768 @60Hz 47.712 60.015 85.5 VESA(WXGA) WUXGA 1920*1080 @60Hz 67.5 60.0 148.5 FHD only(Support to HDMI-PC) (Reduced blanking) - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 If "Error" is displayed, check connection between computer, jig, and set. (3) Click "Read" tab, and then load download file(XXXX.bin) by clicking "Read" filexxx.bin - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 * Display and Sound check is executed by Remote control. <Caution> Not to push the "INSTOP" key after completion if the function inspection. - 9 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 C0.(When R/G/B Gain are all Cool Medium Warm C0, it is the FULL Dynamic Range of Module) spec target - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 Reset 10. 10 Point WB 11. Test Pattern 12. EDID D/L ► 13. Sub B/C 14. Ext. Input Adjust - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12 TV set’s model name in EDID data is below. MODEL NAME MODEL NAME(HEX) LG TV 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 (LG TV) - 12 - Copyright © LG Electronics. Inc. All rights reserved.
  • Page 13 (2) When 3D OSD appear automatically, then select OK button. (3) Don't wear a 3D Glasses, check the picture like below. - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 BLOCK DIAGRAM - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 15 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16 2013.05.09 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. TP_NON_EN Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 140210 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Power_PD_INDIA Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 14/01/03 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR USB_S1 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR HDMI_R1_S1 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 L14_S7LR(M1A) ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR LVDS_NON_EU THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 2013/04/29 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR S_FLASH THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 2013/12/03 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR TUNER_INDIA THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 2013.08.15 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. REAR_JACK_NON_EU Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 2014.01.24 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR HEAD_PHONE_EU THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 2013/12/02 NTP_3AMP Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 2013/04/30 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR RS232C_MSTAR_DEBUG_4P THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 131206 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR IR_EYE_SENSOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 2013/09/16 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MAIN1_NON_EU Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 2013.08.15 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MAIN2_NON_EU Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 30 2013.09.01 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR MHL_SW_AND THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 L14 Repair Process...
  • Page 33 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 Tuning fail, Picture broken/ Freezing 3, 4 A. Video error Color error Vertical/Horizontal bar, residual image, light spot, external device color error No power B.
  • Page 34 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 35 Standard Repair Process Established A. Video error Error 2012. 01 .14 date LCD TV symptom No video/ Normal audio Revised date 1/14 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 Check Power...
  • Page 36 Standard Repair Process Established A. Video error 2012 . 01 .14 Error date LCD TV symptom No video/ No audio Revised date 2/14 ☞A4 Check various Check and No Video/ Normal voltages of Power replace No audio Voltage Board ( 3.5V,12V, 24V) MAIN B/D Replace Power Board and repair...
  • Page 37 Standard Repair Process Established A. Video error 2012. 01 .14 Error date LCD TV symptom Picture broken/ Freezing Revised date 3/14 . By using Digital signal level meter ☞ A5 . By using Diagnostics menu on OSD Check RF Signal level ( Menu→...
  • Page 38 Standard Repair Process Established A. Video error 2012. 01 .14 Error date LCD TV symptom Tuning fail, Picture broken/ Freezing Revised date 4/14 ☞ A5 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 39 Standard Repair Process Established A. Video error 2012. 01 .14 Error date LCD TV symptom Color error Revised date 5/14 ☞ A8/ A9 ☞A7 ※ Check and Check color by input replace Link -External Input Cable Color Color Color -COMPONENT Replace Main B/D Replace module error...
  • Page 40 Standard Repair Process Established A. Video error 2012. 01 .14 Error date LCD TV symptom Vertical / Horizontal bar, residual image, Revised date 6/14 light spot, external device color error Vertical/Horizontal bar, residual image, light spot Replace Module ☞A7 ☞ A8/ A9 Check color condition by input Check external Check and...
  • Page 41 Standard Repair Process Established B. Power error 2012. 01 .14 Error date LCD TV symptom No power Revised date 7/14 ☞A13 ☞A11 DC Power on Normal Replace Check Power Check Power by pressing Power Key Operati Power Power LED LED On On ‘”High”...
  • Page 42 Standard Repair Process Established B. Power error 2012. 01 .14 Error date LCD TV symptom Off when on, off while viewing, power auto on/off Revised date 8/14 Check outlet ☞A14 Check Power Off Check A/C cord Error Abnorm Replace Main B/D Normal Mode Check for all 3- phase...
  • Page 43 Standard Repair Process Established C. Audio error 2012. 01 .14 Error date LCD TV symptom Revised date No audio/ Normal video 9/14 ☞A15 ☞A16 Check user Check audio B+ No audio Normal menu  24V of Power Screen normal Voltage Speaker off Board Cancel OFF...
  • Page 44 Standard Repair Process Established C. Audio error 2012. 01 .14 Error date LCD TV symptom Wrecked audio/ discontinuation/noise Revised date 10/14 → abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio ☞A16 Check input signal Wrecked Audio/ Check and replace Signal Check audio...
  • Page 45 Standard Repair Process D. Function error Established 2012. 01 .14 Error date LCD TV symptom Remote control & Local switch checking Revised date 11/14 1. Remote control(R/C) operating error Replace Main B/D ☞A17 ☞A17 ☞A17 Check & Repair Normal Normal Check R/C itself Check B+ 3.5V Normal...
  • Page 46 Standard Repair Process Established D. Function error 2012. 01 .14 Error date LCD TV symptom External device recognition error Revised date 12/14 Check technical Check External Input and information Technical Signal input Component Replace Main B/D - Fix information information Input signal Recognition error...
  • Page 47 Standard Repair Process Established E. Noise 2012. 01 .14 Error date LCD TV symptom Circuit noise, mechanical noise Revised date 13/14 Replace PSU(with LED driver) Identify Circuit Check location nose type noise of noise Replace LED driver Mechanical Check location of noise noise ※...
  • Page 48 Standard Repair Process Established F. Exterior defect 2012. 01 .14 Error date LCD TV symptom Exterior defect Revised date 14/14 Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote Controller Replace remote controller damage Stand Replace stand damage...
  • Page 49 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 3.5V B. Power error_No power Checking method when power is ON POWER BOARD voltage measuring method B.
  • Page 50 Standard Repair Process Detail Technical Manual Error Established A. Video error_No video/Normal audio 2012. 01.14 symptom date LCD TV Revised Content Check Back Light On with naked eye date <ALL MODELS> Power On -> disjoint back case -> check lighting at 2 points.
  • Page 51 Standard Repair Process Detail Technical Manual Error Established A. Video error_No video/Normal audio 2012. 01 .14 symptom date LCD TV Revised Content Inverter B+ 24V measuring method date 1. Measure DC 24V applying to inverter PCB from Power Board. 2. Output 24V from Power Board -> supply to inverter PCB. Check Pin contacting statement and connection statement.
  • Page 52 Standard Repair Process Detail Technical Manual Error Established A. Video error_No video/Normal audio 2012. 01 .14 symptom date LCD TV Revised Content Check White Balance value date <ALL MODELS> Entry method Entry method 1. Press the ADJ button on the remote controller for adjustment. 1.

  • Page 53: Power On

    Standard Repair Process Detail Technical Manual Error Established A. Video error_No video/ Audio 2012. 01 .14 symptom date LCD TV Revised Content Power Board voltage measuring method date Check DC 3.5V, 12V, 24V 18 Pin (Power Board ↔ Main Board) SMAW200-H18S5 Power on DRV ON...
  • Page 54 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop 2012. 01 .14 symptom date LCD TV Revised TUNER input signal strength checking method Content date MENU => Press red key Remote controller=>signal test => Select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.)
  • Page 55 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop 2012. 01 .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 56 Standard Repair Process Detail Technical Manual Error A. Video error _Vertical/Horizontal bar, residual Established 2012. 01 .14 symptom date image, light spot LCD TV Revised Content LCD TV connection diagram (1) date <ALL MODELS> The picture depends on model. As the part connecting to the external input, check the screen condition by signal...
  • Page 57 Standard Repair Process Detail Technical Manual Error Established A. Video error_Color error 2012. 01 .14 symptom date LCD TV Revised Content A8/A9 Check and replace Link Cable(LVDS) and contact condition date <ALL MODELS> 1. Check and replace LVDS Cable 2. Check LVDS connection condition...
  • Page 58 Standard Repair Process Detail Technical Manual Error Established A. Video error_Color error 2012. 01 .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 59 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 60 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 61 Appendix : Exchange PSU(LED driver) No Light Dim Light Dim Light Dim Light No picture/Sound Ok...
  • Page 62 Appendix : Exchange the Module (1) Panel Mura, Light leakage Press damage Press damage Crosstalk Press damage Crosstalk Un-repairable Cases In this case please exchange the module.
  • Page 63 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 64 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power 2012. 01 .14 symptom date LCD TV Revised Content Check front display LED date ST-BY condition: Red Front LED control : Menu  Option  Standby Light  On/Off...

  • Page 65: 3.5V

    Standard Repair Process Detail Technical Manual Error Established B. Power error _No power 2012. 01 .14 symptom date LCD TV Revised Content Check power input voltage and ST-BY 5V date Check DC 3.5V, 12V, 24V 18 Pin (Power Board ↔ Main Board) SMAW200-H18S5 Power on DRV ON...
  • Page 66 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power 2012. 01 .14 symptom date LCD TV Revised Content Checking method when power is ON date Check “power on(Pin 1)” pin is high(about 3.3V) 18 Pin (Power Board ↔ Main Board) SMAW200-H18S5 Power on DRV ON...
  • Page 67 Standard Repair Process Detail Technical Manual Error Established B. Power error _Off when on, off whiling viewing 2012. 01 .14 symptom date LCD TV Revised Content POWER OFF MODE checking method date <ALL MODELS> Checking order 1. Press the IN-START button of the remote controller for adjustment 2.
  • Page 68 Standard Repair Process Detail Technical Manual Error Established C. Audio error_No audio/Normal video 2012. 01 .14 symptom date LCD TV Revised Content Checking method in menu when there is no audio date <ALL MODELS> Checking order 1. Press the MENU button on the remote controller 2.

  • Page 69: Table Of Contents

    Standard Repair Process Detail Technical Manual Error Established C. Audio error_No audio/Normal video 2012. 01 .14 symptom date LCD TV Revised Voltage and speaker checking method Content date when there is no audio <ALL MODELS> 18 Pin (Power Board ↔ Main Board) ②...

  • Page 70: 3.5V

    Standard Repair Process Detail Technical Manual Error D. Function error_ No response in remote controller, Established 2012. 01 .14 symptom key error date LCD TV Revised Content Remote controller operation checking method date <ALL MODELS> P4600 KEY1 KEY2 ③ 3.5V_ST LED_R ④...

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