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Entry method

1. Press the IN-START button of the remote control for adjustment.

2. Check the entry into adjustment item 3.

Standard Repair Process Detail Technical Manual

POWER OFF MODE checking method

B. Power error

_Off when on, off whiling viewing

A11

Established

date

Revised

date

Error

symptom

Content

A11

Only for training and service purposes.

Содержание 49NANO85UNA

Страница 1: ...poses Any reproduction duplication distribution including by way of email facsimile or other electronic means publication modification copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual The material covered by this prohibition includes without limitation an...

Страница 2: ... reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 SOFTWARE UPDATE 9 BLOCK DIAGRAM 10 EXPLODED VIEW 11 ASSEMBLY DISASSEMBLY GUIDE 12 TROUBLE SHOOTING GUIDE APPENDIX ...

Страница 3: ...he set is safe to operate without damage of electrical shock Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed metallic parts such as ...

Страница 4: ...c charge on your body by touching a known earth ground Alter natively obtain and wear a commercially available discharging wrist strap device which should be removed to prevent poten tial shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrosta...

Страница 5: ...oints of the two original leads If they are not shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 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 3 Solder the connections CAUTION Maintain original spacing between the replaced component...

Страница 6: ...or about 5 minutes prior to the adjustment 3 Test method 1 Performance LGE TV test method followed 2 Demanded other specification Safety CE IEC specification EMC CE IEC 4 General Specification No Item Specification Remark 1 Market North America 2 Broadcasting system ATSC NTSC M 64 256 QAM 3 Available Channel VHF 02 13 UHF 14 69 DTV 02 69 CATV 01 135 CADTV 01 135 4 Receiving system Digital ATSC 64 ...

Страница 7: ...2160P Not Support for FHD 17 3840 2160 112 5 50 594 UDTV 2160P Not Support for FHD 18 3840 2160 134 86 59 94 593 4 UDTV 2160P Not Support for FHD 19 3840 2160 135 60 594 UDTV 2160P Not Support for FHD 20 4096 2160 53 95 23 98 296 7 UDTV 2160P Not Support for FHD 21 4096 2160 54 24 297 UDTV 2160P Not Support for FHD 22 4096 2160 56 25 25 297 UDTV 2160P Not Support for FHD 23 4096 2160 61 43 29 97 2...

Страница 8: ...2 5 50 594 UDTV 2160P Not Support for FHD 28 3840 2160 134 86 59 94 593 4 UDTV 2160P Not Support for FHD 29 3840 2160 135 60 594 UDTV 2160P Not Support for FHD 30 3840 2160 225 100 1188 UDTV 2160P 4K120 model K6Hp HDMI 3 4 port O20 or 8K model 31 3840 2160 269 73 119 88 1186 8 UDTV 2160P 32 3840 2160 270 120 1188 UDTV 2160P 33 4096 2160 53 95 23 98 296 7 UDTV 2160P Not Support for FHD 34 4096 2160...

Страница 9: ...About This TV page for update 5 TV is updating 6 After finished the update below Pop up appear 7 Click Yes TV will be DC OFF ON 8 After TV turned on Check the updated SW Version and Tool Option 2 NSU This Function is needed to connect to the internet 1 Menu All Settings Support Software Update 2 Click CHEK FOR UPDATES system check newest version 3 Click DOWNLOAD AND INSTALL 4 TV is updating 5 Afte...

Страница 10: ...X_TAL 24MHz T2 C S2 Tuner w o D D D Demod od I2S Out I2C 0 I2C 5 R E A R YPbPr SPDIF OUT ETHERNET SUB ASSY IR KEY WIFI BT Combo USB_WIFI CVBS HDMI1 HDMI 2 0 HDMI3 ARC eARC HDMI 2 1 USB2 2 0 RS232C HP HDMI2 HDMI 2 0 AV EPI OCP OCP USB3_0 USB2_2 PHY2_RX0N PHY1_RX0N I2C 3 SIF HDMI4 HDMI 2 1 PHY0_RX0N PMIC Sub PMIC CVBS COMP KGD DDR4 2GB I2C 2 USB1 2 0 OCP USB2_1 Depend on Region Vertical Depend on Re...

Страница 11: ...stics These parts are identified by in the EXPLODED VIEW It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock Fire or other Hazards Do not modify the original design without permission of manufacturer IMPORTANT SAFETY NOTICE LV1 LV2 200A AR2 A10 700 540 530 121 120 570 500 411 400 901 HP1 HS1 HW1 951 902 952 200 ...

Страница 12: ...d service purposes ASSEMBLY DISASSEMBLY GUIDE SET Disassembly Guide 1 Lay the TV Set on a flat pad and Disassemble Stand Screw 65 6ea 55 49 4ea 2 Disassemble B C Screw 3 Prepare B C remove after Checking the Module Holder Position 65 55 49 Screw 12ea Holder 65 55 8ea 49 6ea ...

Страница 13: ... purposes 4 Left Side Disassemble B C Using Opener Put the opener into the gap of guide panel and back cover and move upward We recommend disassembly from the left side 5 Right Side Disassemble B C Using Opener Put the opener into the gap of guide panel and back cover and move upward ...

Страница 15: ... B C on the Module Assy and push the Holder Position 2 Check the Upper Left Right Side gap to make sure the the holder is assembled correctly If the Holder is not assembled B C is opened and easily recognized 3 Assemble the Screw of B C 65 55 49 Screw 12ea Holder 65 55 8ea 49 6ea 4 Assemble Stand Screw 65 6ea 55 49 4ea ...

Страница 16: ...EMBLY DISASSEMBLY GUIDE MODULE Module Disassemble 1 Disassemble of Cover Shield 2 Disassemble of Guide panel screw Disassemble the Screws Disassemble the source PCB from the guide Screw M3 L3 5 65inch 10ea 55inch 7ea 49inch 7ea UP RIGHT LEFT Tapping Screw M2 L4 65inch 18ea 55inch 17ea 49inch 15ea ...

Страница 18: ...rvice purposes Panel assy with Guide pael Disassemble 4 Disassemble of screw M3 L3 5 65inch 4ea 55inch 3ea 49inch 2ea 5 Disassemble Hooks UP 2ea Left Right each 1ea 6 Panel and Guide Panel disassembly using absorber Disassemble Hooks About 350mm About 350mmAbout 40mm About 40mm ...

Страница 19: ...e purposes BLU Disassemble 7 Removal of Sheets 8 Removal of LGP 9 Removal of Reflector 10 Removal of LED Housing Assy The Guide of BLU LCM assemble The module assembly can be performed in reverse disassembly order LED LED Screw Powerlok type M3 L5 65inch 23ea 55inch 14ea 49inch 13ea ...

Страница 21: ...uto on off 7 8 Off when on off while viewing power auto on off 8 9 C Audio error No audio Normal video 9 10 Wrecked audio discontinuation noise 10 11 D Function error Remote control Local switch checking 11 MR20 operating checking 12 12 13 Wifi operating checking 13 14 External device recognition error 14 15 E Noise Circuit noise mechanical noise 15 16 F Exterior error Exterior defect 16 First of ...

Страница 22: ...lace Module N Repair Power Board or parts End Always check record S W Version and White Balance value before replacing the Main Board Replace Main Board Re enter White Balance value Precaution A9 A1 A9 A4 A2 First of all Check whether all of cables between board is inserted properly or not Main B D Power B D Each Cable for Panel Speaker Cable IR B D Cable Error Check LED Driver BD by LED indicator...

Страница 23: ...udio Check and replace MAIN B D Y Replace Power Board and repair parts N End Standard Repair Process A Video error No video No audio A9 Established date Revised date Error symptom 2 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 24: ... Main B D Normal Picture Y N Y Close Y Close By using Digital signal level meter By using Diagnostics menu on OSD Advanced Channels Channel Tuning Manual Tuning Check the Signal Signal strength Normal over 50 Signal Quality Normal over 50 Normal Picture Y Contact with signal distributor or broadcaster Cable or Air N Normal Picture Y Close N A4 Standard Repair Process Established date Revised date ...

Страница 25: ...r Check external device and cable Y External device Cable normal HDMI error Check external device and cable Replace Main T con B D Replace Main T con B D N N A Video error Color error A6 N Y End Replace module Request repair for external device cable Color error A7 Standard Repair Process Established date Revised date Error symptom 4 Check Test pattern A20 Copyright 2020 LG Electronics Inc All rig...

Страница 26: ...HDMI DVI by connecting Jig pattern Generator Set top Box etc N Y Replace Main T con B D Screen normal Check screen condition by input External Input Component HDMI DVI Request repair for external device Component error HDMI DVI Connect other external device and cable Check normal operation of External Input Component RGB and HDMI DVI by connecting Jig pattern Generator Set top Box etc Replace Main...

Страница 27: ...ure voltage of each output of Power B D N Y Normal voltage Replace Main B D Y OK Replace Main B D N Y Normal Check ST BY 3 5V Replace Power B D N Y Normal voltage Replace Power B D Y A8 A9 A9 A9 Standard Repair Process Established date Revised date Error symptom 6 Stand By Red or Turn On Operating Turn Off Close Copyright 2020 LG Electronics Inc All rights reserved Only for training and service pu...

Страница 28: ...place Main B D CPU Abnormal If Power Off mode is not displayed Check Power B D voltage Y N Replace Main B D Normal voltage Replace Power B D Replace Power B D N Y Normal End Caution Check and fix exterior of Power B D Part A11 A9 Established date Revised date Error symptom Standard Repair Process 7 Abnormal 1 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purpo...

Страница 29: ...Check fail after multi power on Check Change Power B D CPUABNORMAL If the CPU attempts to reset in case of abnormal operation and Shut Down in case of failure Check Change Main B D NO POLING Power off when receiving no ack RESULT TV power off on Reboot CONDITION There is no I2C response from CPU for 15 seconds Check Change Main B D CPUCMD Power off by main SoC command Check Change Main B D INV_ERR...

Страница 30: ...ce Power Board and repair parts Check Speaker disconnection N Y Replace Speaker Replace MAIN Board End C Audio error No audio Normal video A12 A13 A9 Disconnection Established date Revised date Error symptom Standard Repair Process 9 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 31: ...External Input Connect and check other external device N Y Normal audio Check and fix external device Replace Power B D N Y Normal voltage Check input signal RF External Input signal Signal normal When RF signal is not received Request repair to external cable ANT provider Y Check audio B Voltage 20V Replace Main B D In case of External Input signal error Check and fix external device Replace Main...

Страница 32: ...m Check Replace Baterry of R C Check Repair Cable connection Connector solder Normal operating Check B 3 5V On Main B D A14 Normal Voltage Close N N Check 3 5v on Power B D Replace Power B D or Replace Main B D Power B D don t have problem A9 Check IR Output signal Normal Signal N Y Repair Replace IR B D N A14 Replace Main B D Y A14 Standard Repair Process Established date Revised date Error sympt...

Страница 33: ... Revised date Error symptom Replace MR20 Turn off on the set and press the wheel Press the back key about 5sec If you conduct the loop at 3times change the MR20 Y Check the INSTART menu RF Receiver ver is 00 00 Y Check Repair RF assy connection N Down load the Firmware INSTART MENU 14 RF Remote control Test 3 Firmware download Y RF Receiver ver is 00 00 N Close A15 A4 A4 12 Close Close Close Copyr...

Страница 34: ...r Wifi cable connection N Check the Wifi wafer 1pin Standard Repair Process Established date Revised date Error symptom 13 Change the Wifi assy Normal Voltage Y Y N Replace Main B D Wi Fi Mac value is NG N A15 A4 A4 A15 Close Close Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 35: ... Check and fix external device cable HDMI DVI Optical Recognition error Replace Main B D Replace Main B D Fix in accordance with technical information D Function error External device recognition error Established date Revised date Error symptom Standard Repair Process 14 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 36: ...ceed as shown in the solution manual For models without any fix information provide the description Mechanical noise is a natural phenomenon and apply the 1st level description When the customer does not agree apply the process by stage Describe the basis of the description in Part related to nose in the Owner s Manual E Noise Circuit noise mechanical noise Established date Revised date Error symp...

Страница 37: ...lace cabinet Replace remote control Remote control damage Stand dent Replace stand F Exterior defect Exterior defect Established date Revised date Error symptom Standard Repair Process 16 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 38: ...g Part A5 6 A Video error _Vertical Horizontal bar residual image light spot Connection diagram A6 7 A Video error_ Color error Check Link Cable Vx1 EPI reconnection condition A7 8 Appendix Defected Type caused by T Con Inverter Module Check Cable 1 2 A 1 11 A 2 11 Exchange Main Board 1 3 A 3 11 A 5 11 Exchange Module 1 3 A 6 11 A 8 11 Exchange T Con 1 2 A 9 11 A 10 11 Exchange Power Board PSU A 1...

Страница 39: ...ecking method in menu when there is no audio A12 13 Voltage and speaker checking method when there is no audio A13 14 D Function error Remote control operation checking method A14 15 Magic Remote WiFi operation checking method A15 16 E Etc How to use the Service remote control A16 A18 17 Check items after Main B D replacement A19 18 Adjustment Test pattern ADJ Key A20 19 Main Board JIG Point A21 C...

Страница 40: ...ptom Content Check Back Light On with naked eye A Video error_No video Normal audio A1 If the Black light LED assemble is OK you can see the lights on each points No Video Normal audio R7802 1 8V 정상 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 41: ...r_No video Normal audio A2 Entry method 1 Press the ADJ button on the remote control for adjustment 2 Enter into White Balance 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 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 42: ...tor 10dB 15dB 20dB etc Standard Repair Process Detail Technical Manual TUNER input signal strength checking method A Video error_Video error video lag stop A3 Established date Revised date Error symptom Content A3 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 43: ...o error video lag stop 1 Checking method for remote control for adjustment Press the IN START with the remote control for adjustment Version A4 Established date Revised date Error symptom Content A4 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 44: ...easuring each voltage from power supply finally replace the MAIN BOARD Standard Repair Process Detail Technical Manual TUNER checking part A Video error_Video error video lag stop A5 Established date Revised date Error symptom Content A5 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 45: ..._Vertical Horizontal bar residual image light spot As the part connecting to the external input check the screen condition by signal A6 Established date Revised date Error symptom Content A6 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 46: ...connection condition A Video error_Color error Check the contact condition of the Link Cable especially dust or mis insertion A7 Established date Revised date Error symptom Content A7 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 47: ...n of FFC cable CABLE R Color Excessive Color is Excessive due to FFC Cable Contact CABLE Screen darkness screen is dark due to poor contact due to disconnection of the FFC cable pin CABLE G Color Excessive G color transient due to poor FFC cable connection Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 48: ...ead LVDS cable connection problem CABLE Color spread LVDS cable connection problem CABLE Screen stop Due to foreign substance withi nLVDS cable PIN Appendix Examples of Symptoms Image error Check for poor cable contact Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 49: ...Main Screen noise Broken screen due to Main IC problem Main Dark picture Dark left side screen Main Broken picture Top bottom screen part Picture problem due to tuner Inner side quality problem Appendix Examples of Symptoms Main Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 50: ...anner Main Screen spread Screen corner appears blurry Main Color Spread Color spread on the screen Main Blurry Screen Blurry picture on the screen Check parts by symptom Appendix Examples of Symptoms Main Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 51: ...n problem Right side screen problem Main LG logo Screen problem Screen picture spread problem Main Right side picture problem No problem at the initial stage During Heat run right side picture problem Check parts by symptom Appendix Examples of Symptoms Main Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 52: ...the screen MODULE Internal matter BLU internal foreign matter inflow MODULE Image broken 6 block image broken MODULE Image broken Screen sync signal broken A 6 11 Check parts by symptom Appendix Examples of Symptoms Module Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 53: ...ng due to lateral external impact and internal bending of BLU MODULE Vertical smear Vertical spreading on cube screen in no signal MODULE Over color Screen contour part brightly Over color A 7 11 Check parts by symptom Appendix Examples of Symptoms Module Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 54: ...nter of the screen 1 block dark MODULE Vertical bar Center Vertical Bar MODULE Darkness at the bottom of the screen MODULE internal BLU breakage A 8 11 Check parts by symptom Appendix Examples of Symptoms Module Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 55: ...d the picture below the screen is broken T CON screen lower image broken T Con is defective and the picture below the screen is broken T CON screen lower image broken T Con is defective and the picture below the screen is broken A 9 11 Check parts by symptom Appendix Examples of Symptoms T Con Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 56: ...f the screen Initial normal operation upper darkness during heat run T CON Image Broken The entire screen is dark and bit noise occurs T CON Image Broken The entire screen is dark and bit noise occurs A 10 11 Check parts by symptom Appendix Examples of Symptoms T Con Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 58: ...ck front Power Indicator B Power error _No power A8 Established date Revised date Error symptom Content A8 ST BY condition On or Off Power ON condition Turn Off Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 59: ... 4 DRV_ON Check J35 SET On above 3V SET St by 0V 5 LED voltage Check P202 to P203 6 LED Indicator Check Normal condition Not blank Abnormal condition Blank 1 9 times SET Model Power P N Name 49NANO85 EAY65169921 LGP65 19UL6 SK100 AC input P202 P203 Picture Condition VIVID Backlight 100 Voltage Variable range V Rated Current Amean 176 7V 159 0 194 4V 0 63A 105mA 6string DRV_ON J35 13 2V J2 PWR_ON J...

Страница 60: ...to adjustment item 3 Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing A11 Established date Revised date Error symptom Content A11 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 61: ...und Out 4 Select TV Speaker Standard Repair Process Detail Technical Manual Checking method in menu when there is no audio C Audio error_No audio Normal video ALL MODELS A12 Established date Revised date Error symptom Content A12 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 62: ...speaker terminal and if you hear the Chik Chik sound when you touch the GND and output terminal the speaker is normal Standard Repair Process Detail Technical Manual Voltage and speaker checking method when there is no audio C Audio error_No audio Normal video A13 Established date Revised date Error symptom Content 1 SPK_ R FT 2 SPK_ R FT 3 SPK_ L FT 4 SPK_ L FT A13 Copyright 2020 LG Electronics I...

Страница 63: ...cking method D Function error A14 Established date Revised date Error symptom Content Checking order to check remote control IR EYE Sensor IR Eye Pin Pin name 1 3 5V_WIFI 2 WIFI_DM 3 WIFI_DP 4 GND 5 WOL WIFI_PWR_ON 6 3 5V_WIFI 7 RESET 8 GND 9 COMBO_RESET_JACK 10 BT_WAKE_UP_HOST 11 GND 12 3 5V_WIFI 13 No Connection 14 No Connection 15 No Connection 16 EYE_SDA 17 EYE_SCL 18 GND 19 IR 20 LED_R 21 GND...

Страница 64: ... 1 pin Checking order to check motion remote wifi A15 Wifi BT Front Wifi BT Rear Pin Pin name 1 3 5V_WIFI 2 WIFI_DM 3 WIFI_DP 4 GND 5 WOL WIFI_PWR_ON 6 3 5V_WIFI 7 RESET 8 GND 9 COMBO_RESET_JACK 10 BT_WAKE_UP_HOST 11 GND 12 3 5V_WIFI 13 No Connection 14 No Connection 15 No Connection 16 EYE_SDA 17 EYE_SCL 18 GND 19 IR 20 LED_R 21 GND 22 3 5V_ST 23 KEY2 24 MIC_DATA 25 MIC_CLK A15 Copyright 2020 LG ...

Страница 65: ... How to use the Service remote control A16 Established date Revised date Error symptom Content 0 4 1 3 0 4 1 3 1 How to access the remote control A16 E Etc Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 66: ...to Screen 4 3 16 9 PSM Changes in the order of Bright Picture Easy Picture Cinema Spots Game Custom PIcture1 Custom Picture2 Bright Picture SSM Added Function Standard user music cinema sports game standard user PIP Picture In Picture is activated TEXT Access to the Power Only mode CAP Broadcasting caption on off MPX Stereo mode mono stereo foreign language access Used when in factory mode Simplin...

Страница 67: ... Red Green Blue Black Pattern Off Change X STUDIO Added function HDD USB external device s HDD screen is activated MENU User function gets activated EXIT Exit from the current mode TIME SHIFT Added function Moves forward backward of recorded contents MUTE Mute function 0 Volume IN STOP SET to factory mode VOL Volume Up Down CH Channel Up Down AV1 2 3 Added function Connects to external input 1 2 3...

Страница 68: ...e model name and serial number after checking the ID label on the back cover 1 Press the Service remote control instart Key 2 Press the Service remote control ADJ Key No 13 Select White Balance Record the R G B GAIN Cut value of the color temperature before main board replacement After replacing the main board key in the recorded value A19 E Etc Copyright 2020 LG Electronics Inc All rights reserve...

Страница 69: ... 11 types of patterns using the ADJ Key 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 A20 Established date Revised date Error symptom Content E Etc A20 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

Страница 70: ...ck Point E Etc A21 Established date Revised date Error symptom Content D13 2V A13V 20V 28V 15V 7V 5 8V 5 69V 1 25V 1 88V 7 91V 16 61V VTERM VCOM1 VCOM2 VGL1 VGL2 VGH VCC18 HVDD VDD A21 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes ...

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