LG 49LF640V Service Manual

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LED TV

SERVICE MANUAL

CHASSIS : LD51H

MODEL : 49LF640V

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

P/NO : MFL68679811 (1503-REV00)

North/Latin America

Europe/Africa

Asia/Oceania

55LF640V

Internal Use Only

http://aic.lgservice.com

http://eic.lgservice.com

http://biz.lgservice.com

49LF640V-ZD

55LF640V-ZD

Printed in Korea

Summary of Contents for LG 49LF640V

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 : LD51H MODEL : 49LF640V 49LF640V-ZD 55LF640V 55LF640V-ZD CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL68679811 (1503-REV00) Printed in Korea...
Page 2 ADJUSTMENT INSTRUCTION .............. 13 BLOCK DIAGRAM ................. 21 EXPLODED VIEW .................. 31 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 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 13.0E, INTELSAT10&7 68.5E, INTELSAT15 85.2E, INTELSAT1R 50.0W, INTELSAT903 33.5W, INTELSAT904 60.0E, NILESAT 7.0W, NSS12 57.0E, THOR 0.8W, TURKSAT 42.0E, YAMAL201 90.0E, OTHER - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 7 EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD Ethernet Connect (1EA) Ethernet Connect PCMCIA Card slot (1EA) PCMCIA slot - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 8 HDTV 1080i 1920×1080 33.75 60.00 HDTV 1080i 1920×1080 33.72 59.94 HDTV 1080i 1920×1080 56.250 HDTV 1080p 1920×1080 67.5 HDTV 1080p - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 9 FHD only 1360 x 768 @60Hz 47.712 60.015 VESA(WXGA) 1920 x 1080 @60Hz 67.5 60.00 WUXGA(CEA 861D) FHD only - 9 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 10 148.5 Side-by-side(half) Secondary(HDTV 1080P) Top-and-Bottom Primary(HDTV 1080P) 67.43 / 67.5 59.94 / 60 148.35 / 148.50 Side-by-side(half) Secondary(HDTV 1080P) - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 11 3D input proposed mode 2D to 3D, Side by Side(Half),Top & Bottom, Checker Board, 1080P 33.75 74.25 MPO(Photo), JPS(Photo) - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 12 7.10. 3D Input mode Single Frame Frame Side by Side Top & Bottom Checker board 2D to 3D Sequential Packing iii. - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 13 Widevine → CI → HDCP14 → HDCP20 ▪ Play: Press Enter key ▪ Result: Ready, Test, OK or NG ▪ Printer Out (MAC Address Label) - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 14 4) Check the model name Instart menu. → Factory name displayed. (ex 55LF630V-ZA) 5) Check the Diagnostics.(DTV country only) → Buyer model displayed. (ex 55LF630V-ZA) - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 15 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 LD51H 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. ⓔ2 ⓔ2...
Page 16 * If TV internal pattern is used, not needed R Gain G Gain B Gain Warm R Cut G Cut - 16 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 17 0.286 ± 0.002 0.289 ± 0.002 9300 K 0.0000 Warm 0.313 ± 0.002 0.329 ± 0.002 6500 K 0.0000 - 17 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 18 * Remark: Inspect in Power Only Mode and check SW version in a master equipment (3) Don't wear a 3D Glasses, check the picture like below. - 18 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 19 (1) Press ADJ key on the Adj. R/C, then select Country Group Meun. (2) Select Country Group Code 04 or Country Group EU. - 19 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 20 (1) RF input: Mono, 1 KHz sine wave signal, 100 % Modulation (2) CVBS, Component: 1 KHz sine wave signal 0.5 Vrms - 20 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 29 9. Panel Interface GMA1/GMA3/GAM9/GMA10/GMA16/GMA18 EPI_LOCK4 LEFT RIGHT - 29 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 30 [EB_CS0] WIFI-BT_DM [USB2_0_DP0] WIFI-BT_DP WIFI-BT [USB2_0_DM0] EYY_SCL EYE_SDA [ I2C_SDA1] IR-KEY [ I2C_SCL1] Micom -EYE KEY1 KEY2 IC101 M14+ - 30 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 31 Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 31 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 32 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. M14 Symbol A M14-Peripheral LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 33 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR M14+ Symbol B THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. M14-Display In/Out LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 34 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR M14+ Symbol C THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. M14-AV In/Out LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 35 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR M14+ DDR3-M0 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 36 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR M14+ DDR3-M1 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 37 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR VCC & GND THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 11/05/31 LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 38 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR CI for DVB 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 39 2014.05.28 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 rights reserved. Only for training and service purposes...
Page 40 2014.05.28 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 41 2013.03.22 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. HDMI LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 42 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR AV 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 43 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR IR / KEY 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 44 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR USB 2 & 3 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 45 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR USB 1(DVR) 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 46 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 47 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 48 2012-09-12 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 49 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR AUDIO[NTP7515] 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 50 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 51 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 52 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 53 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 54 TUNER 2012.07.10 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 55 TU_SYMBOL 2012.09.14 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 56 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 57 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LVDS INTERFACE LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 58 2013.04.03 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. T-Con LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 59 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 rights reserved. Only for training and service purposes...
Page 60 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 61 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 64 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 65 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 66 Check various voltages Normal No Video/ replace of Power Board (13.2V) voltage? No audio 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 67 2. Install Booster S/W Upgrade Contact with signal distributor Normal Picture? or broadcaster (Cable or Air) Normal Picture? Replace Main B/D Close Close LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 68 Request repair for external device/cable Check external External device HDMI/DVI device and Replace Main B/D /Cable error cable normal LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 69 (Check normal operation of screen? External Input, Component, Replace Screen and HDMI/DVI by connecting Main B/D normal? Jig, pattern Generator ,Set-top HDMI/ Box etc. LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 70 And Power output Voltage Normal voltage? (Power output voltage to Main B/D voltage? is 8.8V at STBY Status) ☞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 71 Power off by unknown status except listed case "POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble Abnormal "POWEROFF_CPUABNORMAL" Power off by CPU Abnormal LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 72 Speaker Out (pin no. 7/8) Cancel OFF Replace Power Board and repair parts Check Speaker Replace MAIN Board Disconnection disconnection Replace Speaker LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 73 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 74 (Power B/D don’t have problem) If R/C operate, Normal Close operating? Explain the customer cause is interference 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 75 - S/W Version RGB,HDMI/ 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 rights reserved. Only for training and service purposes...
Page 76 “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 77 Module Replace module damage with exterior damage Cabinet Replace cabinet damage Remote Replace remote controller controller damage Stand Replace stand dent LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 78 Defected Type caused by Main/ Inverter/ Exchange LED driver Board (PSU) A-3/5 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 79 D. Function error_ No response in remote Remote controller operation checking method controller, key error Display has error especially color V-Com checking and adjust method LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 80 After turning on the power and disassembling the case, check with the naked eye, whether you can see light from module holes. LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 81 Check the Voltage between LED+ / LED- The voltage spec is in Power B/D Spec sheet Refer the Power B/D Spec sheet (ex. 55LF63, 156.9V ~ 235.0V) LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 82 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 rights reserved. Only for training and service purposes...
Page 83 Check the 13.2V for Audio 12 Pin (Power Board ↔ Main Board) SMAW200-H12S5K(BK) Power on PWM#2 D13V D13V D13V A13V A13V DRV-ON(Inverter-ON) PWM#1 LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 84 Press Menu Key  Advanced in Quick Settings Menu list  Programmes  Programme Tuning 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 85 <ALL MODELS> 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 rights reserved. Only for training and service purposes...
Page 86 Revised Content Connection diagram 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 87 Content Check Link Cable (EPI) reconnection condition date Check the contact condition of the Link Cable, especially dust or mis insertion. LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 88 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 89 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 90 Abnormal Power Section 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 rights reserved. Only for training and service purposes...
Page 91 Panel Mura, Light leakage Press damage Crosstalk Press damage Crosstalk Un-repairable Cases In this case please exchange the module. Press damage A - 4/5 LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 92 Un-repairable Cases In this case please exchange the module. Horizontal Block Gate TAB IC Defect Gate TAB IC Defect A - 5/5 LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 93 Front LED control : Menu  General  Standby Light  ON/ Off ST-BY condition: Red Power ON condition: Turn Off LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 94 STBY status : 8.8V 12 Pin (Power Board ↔ Main Board) SMAW200-H12S5K(BK) Power on PWM#2 D13V D13V D13V A13V A13V DRV-ON(Inverter-ON) PWM#1 LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 95 Check “power on” pin is high 12 Pin (Power Board ↔ Main Board) SMAW200-H12S5K(BK) Power on PWM#2 D13V D13V D13V A13V A13V DRV-ON(Inverter-ON) PWM#1 LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 96 Entry method 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 97 1. Press the Setting button on the remote controller 2. Select the Sound function of the Menu 3. Select the Sound Out 4. Select TV Speaker LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 98 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 99 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 100 1. Press the ADJ button on the remote controller for adjustment. 2. Enter into V-Com of item 14. 3. Check and adjust V-Com value. LGE Internal Use Only Copyright © 2015 LG Electronics. Inc. All rights reserved. Only for training and service purposes...

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LG 49LF640V Service Manual

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