LG 55SM8600PUA Page 72 Service Manual Download

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Checking order when there is no audio

1.Check the contact condition of or 13.2V connector of Main Board

2. Measure the 13.2V input voltage supplied from Power Board

(If there is no input voltage, remove and check the connector)

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.

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

②

③

SPK_R-FT

SPK_R+FT

SPK_ L-FT

SPK_ L+FT

Only for training and service purposes.

Summary of Contents for 55SM8600PUA

Page 1: ...ce purposes 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 limitat...

Page 2: ...hts reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 SOFTWARE UPDATE 10 BLOCK DIAGRAM 12 EXPLODED VIEW 21 ASSEMBLY DISASSEMBLY 22 TROUBLE SHOOTING GUIDE APPENDIX ...

Page 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 ...

Page 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...

Page 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...

Page 6: ...erformance 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 64 256 QAM Analog NTSC M 5 Video Input NTSC M Rear 1EA 6 Compon...

Page 7: ...0 297 UDTV 2160P 14 3840 2160 112 5 50 594 UDTV 2160P 15 3840 2160 135 60 594 UDTV 2160P 16 3840 2160 225 100 1188 UDTV 2160P 17 3840 2160 270 120 1188 UDTV 2160P 18 4096 2160 53 95 23 97 296 7 UDTV 2160P 19 4096 2160 54 24 297 UDTV 2160P 20 4096 2160 56 25 25 297 UDTV 2160P 21 4096 2160 67 5 30 297 UDTV 2160P 22 4096 2160 112 5 50 594 UDTV 2160P 23 4096 2160 135 60 594 UDTV 2160P 24 4096 2160 225...

Page 8: ...80P 16 1920 1080 27 24 63 36 HDTV 1080P 17 1920 1080 33 71 29 97 79 12 HDTV 1080P 18 1920 1080 33 75 30 79 2 HDTV 1080P 19 1920 1080 56 25 50 148 5 HDTV 1080P 20 1920 1080 67 43 59 94 148 35 HDTV 1080P 21 1920 1080 67 5 60 148 5 HDTV 1080P 22 1920 1080 112 5 100 297 HDTV 1080P 23 1920 1080 134 86 119 88 296 7 HDTV 1080P 24 1920 1080 135 120 297 HDTV 1080P 25 3840 2160 53 95 23 98 296 7 UDTV 2160P ...

Page 9: ...1188 8K 8K Model Only 52 7680 4320 220 50 2376 8K 8K Model Only 53 7680 4320 263 74 59 94 2376 8K 8K Model Only 54 7680 4320 264 60 2376 8K 8K Model Only No Resolution H freq kHz V freq kHz Pixel clock MHz Proposed 1 720 480i 15 73 59 94 13 5 SDTV DVD 480I 525I 2 720 480i 15 75 60 13 514 SDTV DVD 480I 525I 3 720 576i 15 625 50 13 5 SDTV DVD 576I 625I 50Hz 4 720 480p 31 47 59 94 27 SDTV 480P 5 720 ...

Page 10: ...USB port 2 Automatically detect the SW Version and show the below message 3 Click YES initiate the download and install of the update 4 Click Check Now move to 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 ...

Page 11: ... update progress go to Menu All Settings General About This TV 4 If you want to cancel update click 1 1 CANCEL UPDATE 5 NO Keep updating Yes Cancel updating Case 2 NOT Allow Automatic Updates Toggle Item 1 Menu All Settings General About This TV 2 TV will automatically check for updates when every TV boots When an updated is detected the TV will issue an Alert letting the user know that an update ...

Page 12: ... Japan China X_TAL 24MHz X_TAL 32 768KHz I2S Out I2C 0 I2C 4 R E A R YPbPr SPDIF OUT ETHERNET I2C 1 SUB ASSY IR KEY WIFI BT Combo USB_WIFI CVBS HDMI3 HDMI 2 0 USB2 2 0 RS232C HP HDMI2 ARC HDMI 2 0 AV EPI OCP OCP USB2_0 USB2_2 PHY2_RX0N PHY1_RX0N I2C6 SIF HDMI4 HDMI 2 0 PHY0_RX0N PMIC Sub PMIC CVBS COMP M0 M1 DDR3 2133 512MB DDR3 2133 512MB DDR3 2133 512MB DDR3 2133 512MB I2C 5 USB3 2 0 OCP USB2_1 ...

Page 13: ...ice purposes 2 I2C SCL0 SDA0 100Ω 3 3KΩ Main IC 3 3V_NORMAL 3 3KΩ 33Ω IC102 NVRAM 3 3V_NORMAL IC5300 NTP7519 SCL2 SDA2 TUNER SCL4 SDA4 33pF SCL5 SDA5 SCL1 SDA1 IC3000 MICOM 33Ω 3 3KΩ 3 3V_NORMAL 3 3KΩ 3 3V_NORMAL IC8000 SW50212 33Ω IC8100 RT5094 33Ω 47pF 3 3V_TU 1 8KΩ US 1 2KΩ KR ...

Page 14: ..._NORMAL 3 5V_ST 1 8V_IO IC2100 3A TPS563208 0 9V_CPU IC2000 12A TPS56C215RNNR 0 9V_CORE USB1 2 0 USB2 2 0 PANEL MICOM IR_KEY ETHERNET WIFI 3 5V_WOL WIFI_EN 0 9V_CPU 0 9V_CORE Main IC1800 3A TPS563208 SWITCH 0 9V_DDR C4TX NVRAM H P AMP 1 1 1 2V_DEMOD TUNER NTP7519 MAX3232CDR USB1 2 0 DDR3 1 5V_DDR CI_CAM IC6900 2A TJ4320GDP ADJ IC2200 3A TPS563208 Main Main IC2300 2A TJ4320GDP ADJ Main Source IC150...

Page 15: ...U_RESET1 GP C IFAGC 3 3V_TU 1 2KΩ Main IC B1 3 3V_RF 3 FE_D FE_D FE_D FE_DEMOD1_TS_DATA 0 7 TP TP TP 0 1 2 3 TP 4 TP 5 TP 6 TP 7 FE_D FE_D FE_D FE DEMOD1 TS DAT A A T T A A 0 7 TP TP TP 0 1 2 3 TP 4 TP 5 TP 6 TP 7 TDJN H701F TDJN H751F F NIM c ase only D NP D NN AA A AA FILTER IF_ _ P TU IF_ _ IF F F _A A A G G G G G C C C C C TA T T A A DC I INP INN IFAGC TDJS H601F H NIM c ase only RESET T T _D ...

Page 16: ...rved Only for training and service purposes 5 Video Audio Main IC CVBS_IN2 Tuner Jack Side SoC Side JK3401 AV_CVBS_IN AV_L_IN AV_R_IN AV1_CVBS_IN_SOC TU_SIF_TU IF_P N_TU AAD_ADC_SIF DMD_TADC_INP DMD_TADC_INN TU_SIF TADC_I_INN INP Y1_IN COMP1_Y_IN_SOC ...

Page 17: ..._ADC_SIF HP_LOUT HP_ROUT HEAD PHONE LPF AUDA_OUTL_CH1 AUDA_OUTR_CH1 TUNER_SIF IC3000 MICOM AMP_MUTE GPIO23 AMP_RESET_N JK3403 JK6200 LPF Front_L Front_R DACSCK GPIO81 Main IC AUAD_R_CH1_IN AUAD_L_CH2_IN SDA0 GPIO138 SCL0 GPIO139 AUD_LRCK AUD_LRCH IC6300 EAN62668301 I2C_SDA_0_AMP1 I2C_SCL_0_AMP1 DACLRCH GPIO82 DACLRCK AUD_SCK SIDE_HP_MUTE JK3401 6 Audio Out ...

Page 18: ...300 Front AMP NTP7519 LPF IEC958OUT Tuner TR BUF AAD_ADC_SIF TUNER_SIF IC3000 MICOM AMP_MUTE GPIO23 AMP_RESET_N JK3403 LPF Front_L Front_R DACSCK GPIO81 Main IC AUAD_R_CH1_IN AUAD_L_CH2_IN SDA0 GPIO138 SCL0 GPIO139 AUD_LRCK AUD_LRCH I2C_SDA_0_AMP1 I2C_SCL_0_AMP1 DACLRCH GPIO82 DACLRCK AUD_SCK JK3401 7 HDMI ...

Page 19: ...DC_SDA_2 TMDS Link 8bits DDC_SCL_4 DDC_SDA_4 TMDS Link 8bits TMDS DATA 6bits DATA0 1 2 TMDS CLK 2bits TMDS Link 8bits HDMI_CEC_MICOM Q3001 DDC_SCL_1 DDC_SDA_1 JK3104 JK3102 JK3101 J J J J J J J J K K K K K K K K K K K K 3 3 3 3 3 3 3 3 3 3 3 3 3 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 HDMI3 SIDE HDMI2 0 JK3103 DDC_SCL_3 DDC_SDA_3 TMDS Link 8bits DDC_SCL_2 DDC_SDA_...

Page 20: ...ved Only for training and service purposes TX 6lane Main Main IC I2C FCIC_Data EPI Non CEDS P7801 P7800 TX Lock_In PMIC IC8000 Sub PMIC IC8100 GMA 8 CLK 8 EPI GMA 8 CLK 10 CEDS VCOM VCOM T T X TX GMA 8 CLK 8 EPI GMA 8 CLK 10 CEDS 9 EPI 68Pin Interface ...

Page 21: ...ristics 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 400 540 LV1 521 570 800 530 120 HP1 HS1 HW1 AR2 A9 A10 700 900 910 411 500 200A LV2 200...

Page 22: ...and service purposes ASSEMBLY DISASSEMBLY GUIDE SET Disassembly Guide 1 Lay the TV Set on a flat pad and Disassemble Stand Screw 4ea 2 Disassemble B C Screw 3 Prepare B C remove after Checking the Module Holder Position Screw 4ea 65 55 49 Screw 12ea Holder 65 55 8ea 49 6ea ...

Page 23: ... 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 ...

Page 25: ...e 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 Screw 4ea 65 55 49 Screw 12ea Holder 65 55 8ea 49 6ea 4 Assemble Stand Screw 4ea ...

Page 26: ... DISASSEMBLY GUIDE MOUBLE 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 ...

Page 28: ...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 ...

Page 29: ...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 ...

Page 31: ...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 MR19 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 ...

Page 32: ...arts 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 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 Spe...

Page 33: ...dio 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 Error symptom 2 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 34: ... Main B D Check Tuner soldering 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 Establis...

Page 35: ...or 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 Error symptom 4 Copyright 2019 LG Electronics Inc All rig...

Page 36: ... 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 T con B...

Page 37: ...e 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 A17 A18 A18 A18 Standard Repair Process Established date Revised date 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 service ...

Page 38: ...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 A19 A18 Established date Revised date Error symptom Standard Repair Process 7 Abnormal 1 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purp...

Page 39: ...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...

Page 40: ...ace 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 Error symptom Standard Repair Process 9 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 41: ...ternal 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...

Page 42: ...m Check 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 3 5v 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 Error symp...

Page 43: ...ablished date Revised date Error symptom Replace MR19 Turn off on the set and press the wheel Press the back key about 5sec Close If you conduct the loop at 3times change the M4 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 Remocon Test 3 Firmware download Y RF Receiver ver is 00 00 N Close A23 A4 A4 12 Copyright 201...

Page 44: ...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 Close Y Y N Replace Main B D Wi Fi Mac value is NG N Close A24 A4 A4 A24 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

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

Page 46: ...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...

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

Page 48: ...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 49: ...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 Motion Remote 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 How to use JIG Power B D Diagnostic Smart Jig M...

Page 50: ...ror symptom Content Check EPI Lock A Video error_No video Normal audio After turning on the power and disassembling the case check R7801 Voltage 1 8V A1 R7801 1 8V Normal No Video Normal audio Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 51: ...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 52: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 53: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 54: ...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 55: ..._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 56: ...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 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 57: ...f 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 Pin 단선 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 58: ...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 59: ...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 60: ...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 61: ...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 62: ...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 63: ...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 64: ...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 65: ...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 66: ...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 68: ...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 69: ...heck 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 SM86 EAY65169921 LGP65 19UL6 SK100 AC input Power Board Voltage Current 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 2...

Page 70: ...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 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 71: ...Sound 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 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 72: ... 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 Copyright 2019 LG Electronics Inc Al...

Page 73: ...n checking method D Function error A14 Established date Revised date Error symptom Content Checking order to check remote control IR EYE Sensor IR Eye LED 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 BT_WAKE_UP_DEVICE 10 BT_WAKE_UP_HOST 11 GND 12 No Connection 13 No Connection 14 No Connection 15 No Connection 16 EYE_SDA 17 EYE_SCL 18 GND 19 IR 2...

Page 74: ...minal 1 pin Checking order to check motion remote wifi Wifi BT Front Wifi BT Rear A15 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 BT_WAKE_UP_DEVICE 10 BT_WAKE_UP_HOST 11 GND 12 No Connection 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 23 KEY2 24 KEY1 25 GND Copyright 2019 LG Elect...

Page 75: ...w to use the Service remote control D Function error A16 Established date Revised date Error symptom Content 0 4 1 3 0 4 1 3 1 How to access the remote control Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 76: ...nema Zoom 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...

Page 77: ...tern Off White 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 extern...

Page 78: ...D L Key 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 Copyright 2019 LG Electronics Inc All rights rese...

Page 79: ...CH or You can 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 A20 Established date Revised date Error symptom Content Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 81: ...K80 UK89 SK85 SK96 SK95 SK99 SM90 SM98 18Y 19Y UK63 UK64 UK65 UK68 UK7050 UM73 UM74 UM75 UM76 UM79 UM80 New JIG OLD JIG Cable Connection 18 Marking check No Marking 24 Marking Check 15Y OLED 17 18Y 19Y W7 B8 C8 E8 G8 W8 B9 C9 E9 W9 18Y 19Y LK57 32 43 49LK54 32LK61 32LK62 43 49LK61 LM57 LM63 18Y 19Y UK74 UK75 UK77 UK78 SK79 SM80 SM86 16Y UH 16 18Y 19Y UH UK UM 17Y 18Y SJ UJ UK SK 16Y 17Y UH SJ 16Y ...

Page 82: ... LH68 LH66 LH60 LH54 17 OLED B7 C7 E7 G7 W7 17 LED SJ95 UJ98 SJ85 UJ94 SJ80 UJ77 UJ75 UJ78 UJ65 UJ68 UJ63 UJ67 LJ61 LJ68 LJ55 LJ58 18 LED SK80 SK85 SK95 UK78 UK75 UK77 SK79 UK63 UK64 UK65 UK68 UK7050 LK57 32 43 49LK54 32LK61 62 43 49LK61 18 OLED B8 C8 E8 G8 W8 19 LED SM80 SM85 SM86 UM73 UM74 UM75 UM76 UM79 UM80 LM57 LM63 19 OLED B9 C9 E9 W9 Copyright 2019 LG Electronics Inc All rights reserved Onl...

Page 83: ...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 84: ...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 85: ... 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 86: ...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 87: ...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 88: ... 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 89: ... 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 90: ... 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 91: ... 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 92: ... 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 93: ...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 94: ...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 95: ...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 96: ...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 97: ...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 98: ...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 ...

Page 99: ......

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