LG 43LT340C0GB Service Manual Download Page 1

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P/NO : MFL71433001 (1904-REV00)

CHASSIS : LB9KB / LG9KB

MODEL : 43LT340C0TB

43LT340C0GB

CAUTION

BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

LED TV

SERVICE MANUAL

CONFIDENTIAL

Summary of Contents for 43LT340C0GB

Page 1: ...B LG9KB MODEL 43LT340C0TB 43LT340C0GB CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL LED TV SERVICE MANUAL CONFIDENTIAL Copyright 2019 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 2: ... rights reserved Only training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 SOFTWARE UPDATE 9 BLOCK DIAGRAM 10 EXPLODED VIEW 11 DISASSEMBLY GUIDE 13 TROUBLE SHOOTING GUIDE APPENDIX ...

Page 3: ... 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 an...

Page 4: ...arge on your body by touching a known earth ground Alter natively obtain and wear a commercially available discharg ing wrist strap device which should be removed to prevent potential 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 electrostatic ...

Page 5: ...nts 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 a...

Page 6: ...ust be operated for 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 specification 4 Model General Specification No Item Specification Remarks 1 Market Asia Oceania PAL DVB Market 2 Television system 1 Digital TV DVB T T2 DVB C 2 Analogue TV PAL B B PAL B G PAL D K PAL I SECAM B G S...

Page 7: ... 12 1920 1080 33 72 59 94 74 176 HDTV 1080I 13 1920 1080 56 25 50 00 148 50 HDTV 1080P 14 1920 1080 67 50 60 00 148 50 HDTV 1080P 15 1920 1080 67 432 59 94 148 352 HDTV 1080P 16 1920 1080 27 00 24 00 74 25 HDTV 1080P 17 1920 1080 26 97 23 94 74 176 HDTV 1080P 18 1920 1080 33 75 30 00 74 25 HDTV 1080P 19 1920 1080 33 71 29 97 74 176 HDTV 1080P 5 2 RGB Input PC No Resolution H freq kHz V freq Hz Pix...

Page 8: ...25 SDTV 480P 3 720 480 15 73 59 94 13 500 SDTV 480I Don t insert in manual spec out 4 720 480 15 75 60 00 13 514 SDTV 480I 5 720 576 15 62 50 00 13 500 SDTV 576I DVB 6 720 480 31 469 59 94 27 00 SDTV 480P 7 720 480 31 50 60 00 27 027 SDTV 480P 8 720 576 31 250 50 00 27 00 SDTV 576P 9 1280 720 37 50 50 00 74 25 HDTV 720P 10 1280 720 45 00 60 00 74 25 HDTV 720P 11 1280 720 44 96 59 94 74 176 HDTV 72...

Page 9: ...ad and install of the update 4 After finished the update below Pop up appear 5 TV will be DC OFF ON 6 After TV turned on Check the updated SW Version and Tool Option 2 Manual Download 1 Press the SETTINGS or Home button for more than 5 seconds using the user remote control programme information will appear at top left on the screen 2 Enter a four digit password and press OK button The TV is set wi...

Page 10: ...ce purposes M1APR Analog CI FE_TS_Parallel CI AMP Speaker EXT Speaker Digital Tuner DVB T2 C S2 or DVB T2 C NAND Flash 2Gb AV COMP RCA jack type SPIDIF Headphone side Sub Amp TVLink MAX3232 Module LVDS USB side 74 25M HDMI2 SIDE LAN X tal 24MHz HDMI1 REAR 232C RGB BLOCK DIAGRAM ...

Page 11: ... VIEW SET Many electrical and mechanical parts in this chassis have special safety related characteristics 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 SA...

Page 12: ... Inc All rights reserved Only training and service purposes EXPLODED VIEW MODULE MRC use only MRC Module Repair Center IMPORTANT NOTICE POL Front Panel Ass y POL Rear Optical Sheet Rear Side 200PPF 200PPR 200P 200PC 200SL1 200SR1 ...

Page 13: ...l rights reserved Only training and service purposes DISASSEMBLY GUIDE 1 Unlock screws 1 5 EA 2 2 EA 3 1 EA to separate back cover assembly from module Detach the Side AV Label 4 2 Detach the Tape 5 6 1 1 1 1 1 3 Push the LATCH 4 5 6 6 5 ...

Page 14: ...All rights reserved Only training and service purposes 3 Separate connectors 7 from Main Power PCB and module Separate Speaker 8 2 EA from module 4 Unlock screw 9 10 EA to separate from module 7 7 7 7 7 7 8 8 9 9 9 9 9 9 9 9 9 10 10 9 ...

Page 15: ...served Only training and service purposes 5 Detach the Insulation Sheet 11 6 Unlock screw 12 4 EA to separate vesa Detach the supporter 13 4 EA a b b a b b Disassemble ⓑ ⓐ 11 11 11 12 13 13 13 13 12 12 12 Assemble the screw after insert ⓐ ⓑ ⓐ ⓑ ⓐ ⓑ ...

Page 17: ...rror No power 6 7 Off when on off while viewing power auto on off 7 8 8 C Audio error No audio Normal video 9 9 Wrecked audio discontinuation noise 10 10 D Function error Remote control Local switch checking 11 11 External device recognition error 12 12 E Noise Circuit noise mechanical noise 13 13 F Exterior error Exterior defect 14 First of all Check whether there is SVC Bulletin in GSCS System f...

Page 18: ...ts 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 Established date Standard Repair Process Revised date 1 14 Error symptom A Video error No video Normal audio A18 A1 A18 A4 A2 First of all Check whether all of cables between board is inserted properly or not Main B D Power B D LVDS or EPI Cable ...

Page 19: ...o 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 A18 Established date Revised date 2 14 Error symptom 2 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 20: ...n B D Normal Picture Y N Y Close Y 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 3 14 Error...

Page 21: ...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 Check Test pattern A8 A7 Standard Repair Process Established date Revised date 4 14 Error symptom 4 Copyright 2019 LG Electronics Inc All r...

Page 22: ...y 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 T con B D...

Page 23: ...oltage 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 A17 A18 A18 A18 Standard Repair Process Established date Revised date 6 14 Error symptom 6 Stand By Red or Turn On Operating Turn Off Close Copyright 2019 LG Electronics Inc All rights reserved Only for training and servic...

Page 24: ...ce 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 A19 A18 Established date Revised date 7 14 Error symptom Standard Repair Process 7 Abnormal 1 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service pu...

Page 25: ...gh 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_...

Page 26: ... Power Board and repair parts Check Speaker disconnection N Y Replace Speaker Replace MAIN Board End C Audio error No audio Normal video A20 A21 A18 Disconnection Established date Revised date 9 14 Error symptom Standard Repair Process 9 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 27: ...nal 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 13 2V Replace Main B D In case of External Input signal error Check and fix external device Replace Main B ...

Page 28: ...eck Replace Baterry of R C Check Repair Cable connection Connector solder Normal operating Check B 3 5V On Main B D A22 Normal Voltage Close N N Check 13 2v on Power B D Replace Power B D or Replace Main B D Power B D don t have problem A18 Check IR Output signal Normal Signal N Y Repair Replace IR B D N A22 Replace Main B D Y A22 Standard Repair Process Established date Revised date 11 14 Error s...

Page 29: ...eck 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 12 14 Error symptom Standard Repair Process 14 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 30: ...d 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 13 14 Error s...

Page 31: ...e cabinet Replace remote control Remote control damage Stand dent Replace stand F Exterior defect Exterior defect Established date Revised date 14 14 Error symptom Standard Repair Process 16 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 32: ...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...

Page 33: ...nu when there is no audio A11 14 Voltage and speaker checking method when there is no audio A12 15 D Function error Remote control operation checking method A13 16 Motion Remote operation checking method A14 N A 17 E Etc How to use the Service remote control A15 A17 18 Check items after Main B D replacement A18 19 Adjustment Test pattern ADJ Key A19 20 How to use JIG Power B D Diagnostic Smart Jig...

Page 34: ...rror symptom Content Check LVDS A Video error_No video Normal audio After turning on the power and disassembling the case check C1801 Voltage 13V A1 C1801 13V No Video Normal audio Reassemble Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 35: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 36: ... 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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 37: ...or video lag stop 1 Checking method for remote control for adjustment Press the IN START with the remote control for adjustment Version ALL MODELS A4 Established date Revised date Error symptom Content A4 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 38: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 39: ..._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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 40: ...onnection 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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 41: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 42: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 43: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 44: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 45: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 46: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 47: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 48: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 49: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 50: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 52: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 53: ...chnical Manual Revised date A9 Error symptom Content Check power input voltage and ST BY 3 5V B Power error _No power A9 Check the DC 13 2V 20V Check the VLED Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 54: ...justment item 3 Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing ALL MODELS A10 Established date Revised date Error symptom Content A10 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 55: ...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 A11 Established date Revised date Error symptom Content A11 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 56: ... when you touch the GND and output terminal the speaker is normal easure the 13 2V input voltage supplied from Power Board there is no input voltage remove and check the connector Standard Repair Process Detail Technical Manual Voltage and speaker checking method when there is no audio C Audio error_No audio Normal video A12 Established date Revised date Error symptom Content A12 Speaker 1 SPK R 2...

Page 57: ...ise it s defective Standard Repair Process Detail Technical Manual Remote control operation checking method D Function error A13 Established date Revised date Error symptom Content A13 Checking order to check remote control IR EYE Sensor IR Eye LED Pin Pin name 1 GND 2 KEY1 3 KEY2 4 3 5V_ST 5 GND 6 LED_R BUZZ 7 IR 8 GND 9 SENSOR_SCL 10 SENSOR_SDA 11 GND Copyright 2019 LG Electronics Inc All rights...

Page 58: ... How to use the Service remote control A15 Established date Revised date Error symptom Content A15 0 4 1 3 0 4 1 3 1 How to access the remote control E Etc Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 59: ... Aucto 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 Sim...

Page 60: ...hite 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...

Page 61: ... in the 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 E Etc Copyright 2019 LG Electronics Inc All rights reser...

Page 62: ...n view 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 A19 Established date Revised date Error symptom Content A19 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 64: ...28Pin 28Pin 12Pin 12Pin 28Pin 24Pin 24Pin NC Includes 49UJ63 Defect diagnosis Power Board Main Board 16Y OLED 17Y 18Y OLED 18Y SK80 UK89 SK85 SK96 SK95 SK99 18Y UK63 UK64 UK65 UK7050 New JIG OLD JIG Cable Connection 18 Marking check No Marking 24 Marking Check 15Y OLED 17 18Y W7 B8 C8 E8 G8 W8 18Y 32LK61 32LK62 43 49LK61 LU34 LU54 18Y UK74 UK75 UK78 SK79 Copyright 2019 LG Electronics Inc All right...

Page 65: ... UJ94 SJ80 UJ77 UJ75 UJ78 UJ65 UJ68 UJ63 UJ67 LJ61 LJ68 LJ55 LJ58 18 LED SK80 SK85 SK95 UK78 UK75 SK79 UK63 UK64 UK65 UK7050 32LK61 62 43 49LK61 LU34 LU54 18 OLED B8 C8 E8 G8 W8 15Y 16Y 17Y 18Y OLED Model 16Y 17Y 18Y LED Model Existing 12Y 13Y 14Y 15Y LED models included 15Y 16Y 17Y 18Y OLED 16 17 18 Y LED model Power diagnosis function newly added Copyright 2019 LG Electronics Inc All rights rese...

Page 66: ...4 LCD POWER A 2013 Power Board Muitl Gender How to Connect Connect the Muiti Gender to the connector black as shown in picture 2 of the Smart JIG Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 67: ...agnosis can be made only if it is set correctly 24V Power Board Change the switch to 24V of Smart Jig Voltage 20V Power Board Change the switch to 24V of Smart Jig Voltage 13 2V 18V Power Board Change the switch to 24V of Smart Jig Voltage Power B D Smart Jig Voltage Switch 24V 24V 20V 20V 13 2V 18V 24V Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 68: ... Power Cable connector to the Muitl Gender JIG 24Pin connector 3 1 2 Check power board voltage Switch the product S W in JIG to LCD LCD MODEL Check the power voltage and switch 24V to the correct voltage Fix the LCD MODEL switch to 24V Smart JIG 4 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 69: ...oard Diagnostic method 2 5 6 When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 70: ...1 3 2 Switch the LCD MODEL S W to 24V by checking the power voltage Fix the LCD MODEL switch to 24V Smart JIG When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 71: ... switch to 24V Smart JIG Disconnect the Main Board 24Pin Power Cable connector Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector When the OK LED 24V 12V turns on Power Board is normal Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 72: ... Main Board 24Pin Power Cable connector Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 73: ... Main Board 24Pin Power Cable connector Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 74: ... the Muitl Gender JIG 28Pin connector Switch the LCD MODEL S W to 20V by checking the power voltage Fix the LCD MODEL switch to 20V Smart JIG When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 75: ... Muitl Gender JIG 28Pin connector Switch the LCD MODEL S W to 20V by checking the power voltage Fix the LCD MODEL switch to 20V Smart JIG When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 76: ...the Main Board 18Pin Power Cable connector Connect the 18Pin Power Cable connector to the Muitl Gender JIG 24Pin connector When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 77: ...the Main Board 28Pin Power Cable connector Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector When the OK 24V 12V LED turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 78: ...t the Main Board 28Pin Power Cable connector Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 79: ...the Main Board 12Pin Power Cable connector Connect the 12Pin Power Cable connector to the Muitl Gender JIG 12Pin connector When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 80: ...e Main Board 12Pin Power Cable connector Connect the 12Pin Power Cable connector to the Muitl Gender JIG 24Pin connector When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 81: ...e Main Board 28Pin Power Cable connector Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

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