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LG 50LB6500-SF Service Manual
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LG 50LB6500-SF Service Manual

Chassis : lj42b
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LED TV
SERVICE MANUAL
CHASSIS : LJ42B
MODEL : 50LB6500
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFLMFL68007803(1403-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
50LB6500-SF
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 50LB6500-SF

  • 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 : LJ42B MODEL : 50LB6500 50LB6500-SF CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFLMFL68007803(1403-REV00) Printed in Korea...
  • Page 2 PRODUCT SAFETY ................. 3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION .............. 16 EXPLODED VIEW .................. 24 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 1) Performance: LGE TV test method followed 2) Demanded other specification - Safety : CE, IEC specification - EMC: CE, IEC - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 FPR : LC470DUH-PGF1 [47LB7000-SF/7200-SA] Direct M 42” 38.4 FPR : LC420DUH-PGF1 [42LB7000-SF/7200-SA] 55” FPR : LC550EUH-LGF1 [55LB8700-SA] M120Hz Edge LED - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 630 x 630 LC550EUH-LGF1[55LB8700-SA] 210 x 630 LC550DUH-PGF1 [55LB7000-SF/7200-SA] 60” 687 x 687 LC600DUF-FGP2 [60LB6500-SF] Heesung 70” 802 x 802 HC700DUF-VHHD2[70LB7200-SA] - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 HDTV 1080P 1920*1080 26.97 23.976 74.176 HDTV 1080P 1920*1080 33.75 30.00 74.25 HDTV 1080P 1920*1080 33.71 29.97 74.176 HDTV 1080P - 9 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 63.981 60.020 109.00 SXGA Only FHD Model (Support to HDMI-PC) 1920*1080 67.5 158.40 WUXGA (Reduced Blanking) Only FHD Model - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 HDTV 1080P 2D to 3D Side by Side(half), Top & Bottom, Checkerboard, Single Frame Sequential, Row Interleaving, Column Interleaving - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12 148.35/148.5 Frame packing Primary(HDTV 720P) Line alternative (HDTV 720P) 44.96 / 45 59.94 / 60 148.35/148.5 Side-by-side(Full) (HDTV 720P) - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 Top & Bottom, Checker Board, Single Frame Sequential Row Interleaving, Column Interleaving Others 2D to 3D 640*350 720*400 640*480 800*600 1152*864 - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 Side by Side(half) Top & Bottom 1920*1080 33.71 29.97 74.176 2D to 3D, HDTV 1080P Side by Side(half) Top & Bottom - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 Side by Side(Half)*, Top & Bottom*, Checkerboard* Row Interleaving, Column Interleaving (Photo : side by Side(half), Top & Bottom) - 15 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16 ▪ Using RS-232C ▪ PING Test ▪ Selection Factory output option 4.1.6. Inspection - In INSTART menu, check these keys. - 16 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 NG 03 02x (Failed condition) OK 03 03x (Success condition) (7) End of Adjustment ad 00 90 d 00 OK90x - 17 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 5. Factory Adjustment * EDID data for Non-3DTV (FHD) (Model name = LG TV ) *Rev. 24xxx to confirm that, Rev. up subject to change 5.1. EDID (The Extended Display Identification Data)/DDC (Display Data Channel) Download - HDMI EDID table - HDMI-1 EDID table (0x42, 0X1B) ●...
  • Page 19 ※ AUO, INX, Sharp, CSOT, BOE Model (in case, Cool spec = B Gain 13000K) cool warm spec target - 19 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 For correct it to the model’s module from factory JIG model. ※ Push The “IN STOP KEY” after completing the function inspection. - 20 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 * Remark: Inspect in Power Only Mode and check SW version in a master equipment Fig.3 <NG in 3D mode without 3D glasses> - 21 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 3 Poles : GND Test = POWER CORD GND and SIGNAL CABLE GND. Hi-pot Test = POWER CORD GND and LIVE & NEUTRAL. (4) LEAKAGE CURRENT: At 0.5mArms - 22 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 (5) After download is finished, remove the USB stick. ( it will be auto-reboot ) (6) Press “IN-START” key of ADJ remote control, check the S/W version. - 23 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 24 - Copyright © 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 M14 Symbol A THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. M14-Peripheral Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 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 Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 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 Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR M14 DDR3-M0 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR M14 DDR3-M1 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 30 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR VCC & GND THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 11/05/31 Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 2013.03.22 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR POWER THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 2013.03.22 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MICOM Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 2013.03.22 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. HDMI Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 34 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR AV JACK THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. IR / KEY Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 36 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR USB 2 & 3 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR USB 1(DVR) THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 38 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. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 39 2012-09-12 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR ETHERNET THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 40 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR AUDIO[ST] THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 41 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. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 42 TUNER 2012.03.08 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 43 TUNER 2012.07.10 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 44 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LVDS INTERFACE Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 45 LOCAL DIMMING 2012.09.14 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 46 2013.04.03 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. T-Con Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 47 11.09.29 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 48 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR IR Blaster/Boost THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 51 **LB7200 S* / **LB7000 S* / **LB6500 S* **LB7200-S* / **LB7000-S* / **LB6500-S* - LT42B **LB720T-D* / **LB6700-D* / **LB700T-D* **LB650T-D* / **LB6500-D* LB650T-D / LB6500-D Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 52 First of all, Check whether there is SVC Bulletin in GCSC System for these model. k h th i SVC B ll ti i GCSC S t Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 53 Always check & record S/W Version and White Replace Main Board Re-enter White Balance value Balance value before replacing the Main Board Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 54 Normal No Video/No audio of Power Board replace voltage? ( 3.5V,12V or 24V…) MAIN B/D Replace Power Board and repair parts Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 55 2. Install Booster S/W Upgrade Replace Contact with signal distributor Normal Main B/D Picture? or broadcaster (Cable or Air) Normal Picture? Close Close Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 56 Request repair for external device/cable Check external External device HDMI/DVI device and Replace Main B/D /Cable error cable normal Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 57 (Check normal operation of HDMI/ External Input, Component Replace Screen and HDMI/DVI by normal? Main B/D connecting Jig, pattern Generator ,Set-top Box etc. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 58 Measure voltage of each output of Power B/D Normal? Normal? Normal ※ Replace Main B/D voltage? Close Normal Check ST-BY 3.5V voltage? ☞A18 Replace Power B/D Replace Power Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 59 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 Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 60 Replace Power Board and repair parts Check Speaker Replace MAIN Board Disconnection disconnection Connect Speaker to Main cable Connect Speaker to Main cable Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 61 Input signal error) Connect and check Normal Check and fix other external device audio? external device Check and fix external device Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 62 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. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 63 HDMI/ Check and fix DVI, Optical Replace Main B/D Fix in external device/cable Recognition error accordance with technical with technical information Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 64 Replace module Adjust VCOM exterior damage damage ☞A28 Cabinet Replace cabinet damage Remote controller Replace remote controller damage Stand Replace stand dent Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 65 “Part related to noise” in the Owners Manual. as shown in the solution manual (For models without any fix information, provide the description) Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 66 Exchange LED driver Board (PSU) A-3/5 Module Exchange Module itself (1) A-4/5 Exchange Module itself (2) A-5/5 Continue to the next page Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 67 D. Function error_ No response in remote controller Motion Remote controller operation checking method E. VCOM Adjustment Sequence of the Vcom adjustment Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 68 3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm), th R G B (GAIN C t) f C l l/M di re-enter the value after replacing the MAIN BOARD. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 69 (Power Board ↔ Main Board) - Common SMAW200-H24S5 Power on INV_ON 3.5V PDIM #1 3.5V 3.5V PDIM #2 PDIM #2 L/DIM0_VS L/DIM0_MOSI L/DIM0_SCLK Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 70 Menu(QUICK SETTING) Channels Channel Tuning Manual Tuning Antenna DTV When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 71 1. Checking method for remote controller for adjustment Version Press the IN-START with the remote ess t e t t e e ote controller for adjustment Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 72 LCD TV connection diagram date date <ALL MODELS> As the part connecting to the external input, check the screen condition by signal Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 73 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. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
  • Page 74 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!) Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 75 Solder defect, CNT Broken t CNT B k T-Con Defect, CNT Broken Abnormal Power Section Solder defect, Short/Crack Solder defect, Short/Crack Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 76 Abnormal Power Section Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack Solder defect, Short/Crack Noise GRADATION GRADATION Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 77 Appendix : Exchange LED driver Board(PSU) A-3/5 No Light Dim Light Dim Light Dim Light Dim Light Dim Light No picture/Sound Ok Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 78 Panel Mura, Light leakage Press damage Crosstalk Press damage Crosstalk Un-repairable Cases In this case please exchange the module. Press damage Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 79 Un-repairable Cases In this case please exchange the module. Horizontal Block Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 80 Power ON condition: Off ※ Be careful : LB65 / LB67 / LB69 / LB70 / LB72 Models have a Standby Light Control UI Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 81 (Power Board ↔ Main Board) - Common SMAW200-H24S5 SMAW200-H24S5 Power on INV_ON 3.5V PDIM #1 3.5V 3.5V PDIM #2 L/DIM0_VS L/DIM0_MOSI L/DIM0_SCLK Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 82 Entry method 1. Press the IN-START button of the remote controller for adjustment 2. Check the entry into adjustment item 3 Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 83 2 Select the Sound function of the Menu 2. Select the Sound function of the Menu 3. Select Sound Out function of the Menu Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 84 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. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
  • Page 85 ON diti it i th A Tester needle moves slowly, and defective when it does not move at all. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 86 ■ Push the OK key to store the value. Then the message “Saving OK” is pop. ■ Press the exit key to finish V-COM adjustment. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 87 1, 2. Check IR cable condition between IR & Main board. 3. Check the 3.5V_WOL on the terminal 2. 4. Check the B/T version value. ④ ④ Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

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50lb6500