LG 65SM9000PUA Service Manual Download Page 76

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Check the DC 13.2V line ST-BY Voltage

Power Board Voltage and Current

Output

Voltage

Current

STBY

7.56Vrms ~ 9.24Vrms

17mA(0~17mA)

13.2V

12.54V ~ 13.86V

3.2A (0.1~3.2A

20.0V

18V ~ 22V

0.8A (0.1~0.8A)

Standard Repair Process Detail Technical Manual

POWER OFF MODE checking method

B. Power error

_Off when on, off whiling viewing

Established

date

Revised

date

Error

symptom

Content

Only for training and service purposes.

Summary of Contents for 65SM9000PUA

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 20 ASSEMBLY DISASSEMBLY 21 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: ...he receiver must 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 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 Rec...

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: ... 43 4096 2160 225 100 1188 UDTV 2160P 44 4096 2160 270 120 1188 UDTV 2160P 45 2560 1440 88 78 60 241 5 3K non standard 46 2560 1440 183 120 497 7 3K non standard 47 7680 4320 107 89 23 98 1188 8K 8K Model Only 48 7680 4320 108 24 1188 8K 8K Model Only 49 7680 4320 110 25 1188 8K 8K Model Only 50 7680 4320 131 87 29 97 1188 8K 8K Model Only 51 7680 4320 132 30 1188 8K 8K Model Only 52 7680 4320 220...

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: ...AL 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 DDR4 2640 512MB DDR4 2640 512MB DDR4 2640 512MB DDR4 2640 512MB I2C 5 USB3 2 0 OCP USB2_1 Depend on Region...

Page 13: ...Ω 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 1 8KΩ 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 2 7KΩ 33Ω IC7001 LNB 3 3V_NORMAL SCL3 SDA3 TUNER JAPAN 33Ω Depend on Region ...

Page 14: ...PS563208 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 IC1502 1A LR1801G ADJ DDR4 DDR4 1 2V_DDR 2 5V_VPP CI_CAM IC6900 2A TJ4320GDP ADJ IC6800 2A TJ4320GDP ADJ 2 5V_DEMOD IC2200 3A TPS563208 Main Main IC230...

Page 15: ...U_CVBS IF_AGC TADC I INP INN TU_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 US 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 KR RESET T T _D TU_CVBS TU_RESET1 GP C IF_AGC 5...

Page 16: ...Audio In Main IC CVBS_IN2 Tuner Jack Side SoC Side JK3401 AV_CVBS_IN AV_L_IN AV_R_IN AV1_CVBS_IN_SOC TU_CVBS_TU TU_SIF_TU IF_P N_TU CVBS_IN1 AAD_ADC_SIF DMD_TADC_INP DMD_TADC_INN TU_CVBS TU_SIF TADC_I_INN INP I_N P_TU Q_N P_TU SADC_I Q_INN INP DMD_SADC_INN INP_I DMD_SADC_INN INP_Q Y1_IN COMP1_Y_IN_SOC ...

Page 17: ...HY1 PHY0 HDMI2 0_1 HDMI2 0_2 HDMI2 0_3 HDMI2 0_4 HDMI2 1_3 HDMI2 1_2 HDMI2 1_1 HDMI2 1_0 eARC eARC ARC HDMI2 HDMI1 HDMI2 HDMI3 HDMI4 3 3V 0 95V 5V HPD TMDS GPIO 4EA I2C_2 0x42 S W 4Pin Debug I2C_4 ARC ARC TX eARC TX ARC_RX MUX Micom CEC I2C_1 4Pin UART Debug HDMI UEI Detect Port 17 SPDIF Jack SPDIF GPIO11 GPIO12 Low High GPIO GPIO Each 6 HDMI ...

Page 18: ... WIFI_DP USB2_2_DM0 USB2_2_DP0 RENESAS MICOM IC3000 UART0_TXD GPIO105 UART0_RXD GPIO106 SOC_TX SOC_RX IC7200 MAX3232CDR USB2 0 WIFI Combo BT_RESET BT_WAKEUP_DEVICE BT_WAKEUP_HOST OCP IC4700 BD2242G OCP IC4501 BD2242G 5V_NORMAL 5V_NORMAL JK4400 JK4200 USB2 0 Main IC USB2 0_2_DM1 USB2 0_2_DP1 OCP IC4700 BD2242G 5V_NORMAL USB3 Rear 5V_USB_3 USB_CTL2 USB_OCD2 JK4600 USB2 0_3_DM0 USB2 0_3_DP0 USB2 0 7 ...

Page 19: ...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 8 EPI 68Pin Interface ...

Page 20: ...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 LV1 800 530 HP1 HS1 540 LV2 200 521 HW1 AR2 700 A10 570 710 500 900 910 200A A9 200D 121 12...

Page 21: ...nc All rights reserved Only for training and service purposes ASSEMBLY DISASSEMBLY GUIDE Disassembly Guide 1 Lay the TV Set on a flat Pad and Remove the stand screw 4ea After separate stand cover Remove the stand screw 4ea SM90 SM95 ...

Page 22: ...Remove the bottom screw 5ea Additional for 65 Remove 1ea Screw of the Power Cord Bracket 3 After recognizing a B C Ready to remove the B C B C assembly structure Module Plate Spring BackCover Latch 65SM90 95 Latch 18 Point 65SM90 95 Screw 6 Point 55SM90 95 Screw 5 Point 55SM90 95 Latch 16 Point ...

Page 23: ...ses 4 Hold the left bottom handle and lift the B C At the same time gently pushing the left side of the B C toward the inside of the set Separate the B C from bottom to top direction If push with strong force from left side Side Latch will break Handle L 4 1 push 4 2 Up push Up push Up Up ...

Page 24: ... 5 Hold the right bottom handle and lift the B C At the same time gently pushing the right side of the B C toward the inside of the set Separate the B C from bottom to top direction If push with strong force from right side Side Latch will break Handle R 5 2 5 3 push Up 5 1 push Up push Up Up ...

Page 25: ...f the B C After with one hand pushing the B C in the upward direction and at the same time with the other hand tap the right bottom of the B C 2 or 3 times in the upward direction 7 With one hand Pushing the B C in the upward direction and at the same time With the other hand tap the left bottom of the B C 2 or 3 times in the upward direction 8 12cm ...

Page 26: ...direction and simultaneously With the other hand tap the center bottom of the B C 2 or 3 times in the upward direction And Make sure that the top of the B C is completely separated from the plate spring If Push the bottom of the B C upwards with a strong force Top Latch may break 9 Supports the bottom of the B C center Check the Latch separation ...

Page 28: ...g and service purposes Assembly Guide 1 Place the B C in the module plate spring and Press Latch Points to assemble the B C 2 Check whether gap occurs in the Top left side right side of the B C 65SM90 95 Latch 18 Point push plate Spring B C Latch 55SM90 95 Latch 16 Point ...

Page 29: ...Inc All rights reserved Only for training and service purposes 3 Assemble the Bottom screw 5ea For 65 After assemble the Power Cord Bracket assemble the 1ea Screw 65SM90 95 65SM90 95 Screw 6 Point 55SM90 95 Screw 5 Point 55SM90 95 ...

Page 31: ...SEMBLY GUIDE MOUBLE 65 bottom side screws 6ea 55 bottom side screws 6ea 49 bottom side screws 4ea Remove bridge FFC tape 2ea before disassembly only 65 65 The reverse side screws 9ea Bottom side screws 8ea 55 The reverse side screws 9ea Bottom side screws 7ea 49 The reverse side screw 6ea Bottom side screws 5ea bottom side screws 5ea 65 up left right screws 22ea bottom side screws 7ea 55 up left r...

Page 32: ...he S PCB from holder 6 Reverse the module and disassemble the 5 screws 7 Separate the guide panel hook and guide panel from cover bottom 8 Disassemble the panel and guide panel use absorbent equipment Two people should hold the left right each side and reverse it Fix the S PCB to Panel use the tape Only SK95 ...

Page 33: ...es 9 Disassemble the sheet and DP 10 Disassemble the DPS 11 Disassemble the reflector sheet 12 Disassemble the LED array Sheet 3ea DP 1ea 65 DPS 18ea 55 DPS 16ea 49 DPS 12ea Be careful not to damage the reflector sheet Press the CNT of extension B D and then remove the LED array at an angle ...

Page 34: ... the DP and sheet Hold the front of LED array and assemble the LED array Assemble according to the direction like picture Press LED Array to cover botom Assemble according to Guide embo Assemble the reflector sheet bellow the lens with your fingers In the case of corner place the sheet with the holes on top of the sheet without the holes Make sure it is assembled on the sheet hangers Up Down ...

Page 35: ...e the panel and guide panel use absorbent equipment 6 Assemble the guide panel hook 7 Tighten the screws from back side 5 points and bottom side of guide panel 8 Reverse the module Assemble the upper left right first and assemble the bottom left right Remove the fixed tape first then reverse the module ...

Page 36: ...eserved Only for training and service purposes 9 Aassemble the S PCB to holder 10 Aassemble the guide panel and case top 11 Aassemble the S PCB cover shield 12 Aassemble the bottom deco assemble the case top only 49 Attach the bridge FFC tape 2ea ...

Page 38: ...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 39: ...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 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...

Page 40: ...io 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 41: ... 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 42: ...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 43: ... 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 44: ...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 45: ...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 46: ...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 47: ...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 48: ...xternal 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 ...

Page 49: ...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 50: ...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 51: ...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 52: ... 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 53: ...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 54: ...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 55: ...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 56: ...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 57: ...ical Manual A1 불량증상 내용 EPI Lock 확인 A 비디오 에러_ 비디오X 오디오 O R7801 1 8V 정상 After turning on the power and disassembling the case check R7801 Voltage 1 8V Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 58: ...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 59: ...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 60: ...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 61: ...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 62: ..._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 63: ...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 64: ...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 65: ...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 66: ...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 67: ...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 68: ...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 69: ...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 70: ...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 71: ...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 72: ...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 73: ...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 75: ...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 76: ...3 2V 12 54V 13 86V 3 2A 0 1 3 2A 20 0V 18V 22V 0 8A 0 1 0 8A Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing A9 Established date Revised date Error symptom Content Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 77: ...or 7 Driver IC error or MCU error Check 8 No input V sync LED Error Condition Slim Direct Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing A10 Established date Revised date Error symptom Content Condition Error signal Message interval 6 second Apply Model LED B Voltage Check Times blink Times blink Times blink Times blink...

Page 78: ...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 79: ...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 80: ...air 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 5 SPK_R CF 2 SPK_R FT 6 SPK_R CF 3 SPK_L FT 7 SPK_L CF 4 SPK_L FT 8 SPK_L CF Output Voltage Current STBY 7 56Vrms 9 24Vrms 17mA 0 17mA 13 2V 12 54V 13 86V 3 2A 0 1 3 2A 20 0V 18V 22V 0 8A 0 1 0 8A Outpu...

Page 81: ...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 82: ...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 83: ...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 84: ...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 85: ...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 86: ...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 87: ...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 89: ...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 90: ... 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 91: ...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 92: ...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 93: ... 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 94: ...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 95: ...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 96: ... 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 97: ... 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 98: ... 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 99: ... 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 100: ... 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 101: ...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 102: ...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 103: ...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 104: ...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 105: ...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 106: ...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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