LG 49UJ7700 Service Manual Download Page 67

Page: 67 / 97

Established

date

Standard Repair Process Detail Technical Manual

Revised

date

A18

Error

symptom

Content

Check power input voltage and ST-BY 3.5V

B. Power error _No power

A18

Check the DC 13.2V.

Backlight

Forward Voltage

Symbol

Values

Unit

Min

Typ

Max

90.09

100.1

110.11

Vdc

101.61

112.0

124.19

106.38

118.2

130.2

122.76

136.4

150.04

128.34

142.6

156.86

Only for training and service purposes.

Summary of Contents for 49UJ7700

Page 1: ...r electronic means publication modification copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual The material covered by this prohibition includes without limitation any text graphics or logos in this Service Manual CONFIDENTIAL Copyright 2017 LG Electronics ...

Page 2: ...ights reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 SOFTWARE UPDATE 9 BLOCK DIAGRAM 10 EXPLODED VIEW 21 DISASSEMBLY GUIDE 23 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: ...ormance 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 gender 1EA 6 Co...

Page 7: ...ed Blanking 10 1920 1080 135 120 297 UDTV 1080P 11 3840 2160 54 24 00 297 00 UDTV 2160P 12 3840 2160 56 25 25 00 297 00 UDTV 2160P 13 3840 2160 67 5 30 00 297 00 UDTV 2160P 14 4096 2160 53 95 23 97 296 70 UDTV 2160P 15 4096 2160 54 24 297 UDTV 2160P No Resolution H freq kHz V freq kHz Pixel clock MHz Proposed 1 720 480i 15 73 59 94 13 50 SDTV DVD 480I 525I 2 720 480i 15 75 60 00 13 51 SDTV DVD 480...

Page 8: ...6 HDTV 1080P 17 1920 1080p 33 71 29 97 79 120 HDTV 1080P 18 1920 1080p 33 75 30 00 79 20 HDTV 1080P 19 1920 1080p 56 25 50 00 148 5 HDTV 1080P 20 1920 1080p 67 43 59 94 148 35 HDTV 1080P 21 1920 1080p 67 5 60 00 148 50 HDTV 1080P 22 1920 1080p 112 5 100 297 00 UDTV 1080P 23 1920 1080p 134 86 119 88 296 70 UDTV 1080P 24 1920 1080p 135 00 120 297 UDTV 1080P 25 3840 2160p 53 95 23 98 296 70 UDTV 2160...

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

Page 10: ...MHz T2 C W O AD I2S Out I2C 0 I2C 4 R E A R YPbPr SPDIF OUT ETHERNET I2C 1 USB_WIFI CVBS HDMI3 HDMI 2 0 USB2 2 0 RS232C HP HDMI2 ARC HDMI 2 0 AV EPI 3G 1 5G OCP OCP USB2 0_2_DM1 USB2 0_3_DM0 PHY2_RX0N PHY1_RX0N I2C6 SIF HDMI4 HDMI 2 0 PHY0_RX0N PMIC GAMMA IC CVBS COMP M0 M1 DDR3 2133 512MB DDR3 2133 512MB DDR3 2133 256MB DDR3 2133 256MB I2C 5 V x 1 60Hz 8lane 2 97Gbps only I2C2 V x 1 2 97Gbps Sub ...

Page 11: ...SDA0 100Ω 3 3KΩ Main SoC 3 3V_NORMAL 3 3KΩ 33Ω IC102 NVRAM 3 3V_NORMAL IC5300 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 IC9200 33Ω IC9400 33Ω 33Ω 33Ω 47pF 3 3V_TU SCL2 SDA2 3 3KΩ 33Ω Module TCON 3 3V_NORMAL V x 1 60Hz 8lane 2 97Gbps only ...

Page 12: ...IC1100 IC1700 4A Audio IC DDR3 3 3V_NORMAL 3 5V_ST 1 8V_IO IC2100 3A 0 9V_CPU IC2000 10A 0 9V_CORE A13V USB1 2 0 USB2 2 0 PANEL IC1500 3 5A 1 5V_DDR MICOM IR_KEY ETHERNET WIFI 3 5V_WOL WIFI_EN CPU_1V0 M16P Main IC6900 2A IC1800 3A SWITCH 0 9V_DDR M16P NVRAM H P AMP 1 2V_DEMOD TUNER NTP7515 MAX3232CDR IC2200 2A IC2300 2A AVDDT_EPI_C4TX M16P M16P ...

Page 13: ...FE_DEMOD1_TS_DATA 4 22 FE_DEMOD1_TS_DATA 5 23 FE_DEMOD1_TS_DATA 6 24 FE_DEMOD1_TS_DATA 7 25 3 3V_TU I2C_SCL5_TU 1 I2C_SDA5_TU 2 TU_SIF_TU 6 TU_CVBS_TU 4 IF_AGC_TU 5 TU_RESET1_TU 10 FILTER FE_DEMOD1_TS_CLK FE_DEMOD1_TS_SYNC FE_DEMOD1_TS_VAL FE_DEMOD1_TS_DATA 0 7 33 Ω IF_P_TU IF_N_TU TU_CVBS IF_AGC IF_P_MAIN IF_N_MAIN TU_RESET1 GPIO26 CVBS_IN1 IFAGC 3 3V_TU 1 8KΩ Main SoC TP_DVB_CLK TP_DVB_SOP TP_DV...

Page 14: ..._IN COMP2_Pb COMP2_Pr COMP2 AV_L_IN COMP2 AV_R_IN AV1_CVBS_IN_SOC COMP2_Pb_IN_SOC COMP2_Pr_IN_SOC AUAD_L_CH2_IN AUAD_L_CH2_IN AUAD_R_CH2_IN TU_CVBS_TU TU_SIF_TU IF_P N_TU CVBS_IN1 AAD_ADC_SIF DMD_ADC_INP DMD_ADC_INN TU_CVBS TU_SIF IF_P N FE_DEMOD1 2_TS_CLK SYNC VAL FE_DEMOD1 2_TS_CLK SYNC VAL TP0CLK VLD SYNC AUAD_R_CH2_IN VIN3P VIN5P COMP2_Y Y1_IN COMP2_Y_IN_SOC ...

Page 15: ...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 SoC JK3400 COMP2 AV_R_IN COMP2 AV_L_IN 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 6 I2C Map ...

Page 16: ...8kHz HDMI1 SIDE HDMI2 0 DDC_SCL_1 DDC_SDA_1 TMDS Link 8bits DDC_SCL_2 DDC_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 HDMI3 Rear HDMI2 0 JK3103 DDC_SCL_3 DDC_SDA_3 TMDS Link 8bits DDC_SCL_2 DDC_SDA_2 PHY0_ARC_OUT DDC_SCL_3 DDC_SDA_3 DDC_SCL_4 DDC_SDA_4 7 EPI block PM...

Page 17: ...2 0_2_DM1 IC1600 5V 4A 5V_USB_3 5V_USB_2 USB_OCD2 USB_CTL2 USB_CTL2 USB_OCD2 WIFI_DM WIFI_DP USB2_2_DM0 USB2_2_DP0 MICOM IC3000 UART0_TXD GPIO105 UART0_RXD GPIO106 SOC_TX SOC_RX IC7200 USB2 0 WIFI Combo BT_RESET BT_WAKEUP_DEVICE BT_WAKEUP_HOST OCP IC4700 OCP IC4501 5V_NORMAL 5V_NORMAL JK4400 JK4600 USB2 0 Main SoC USB2_1_DM0 USB2_1_DP0 SPI_CS1 GPIO32 SPI_DI1 GPIO35 8 USB WIFI M REMOTE UART ...

Page 18: ...0 Boost IC IC9300 VCORE VCC18 HVDD VDD_EPI VCOM1 VCOMLFB VCOM2 VGL1 VST GIP_RST LS_VGL VGH_EVEN VGH_ODD VGH 10 CLK 1 10 GMA1 4 5 6 9 10 13 14 15 18 10 PM_VCC SDA2 GPIO78 SCL2 GPIO79 I2C_SDA_BACKEND I2C_SCL_BACKEND VDD_EPI VCORE SWG SWO SWI PM_VCC VCC18 PANEL_VCC E0 GST MCLK GCLK PANEL_VCC 9 EPI 60Pin Interface 60Hz 3Gbps ...

Page 19: ... VDD_EPI VCOM1 VCOMLFB VCOM2 VGL1 VST GIP_RST LS_VGL VGH_EVEN VGH_ODD VGH 6 CLK 1 6 GMA1 5 6 9 10 13 14 18 8 GMA2 3 4 7 8 11 12 15 16 17 SDA2 GPIO78 SCL2 GPIO79 I2C_SDA_BACKEND I2C_SCL_BACKEND VDD_EPI VCORE SWG SWO SWI PM_VCC VCC18 PANEL_VCC E0 GST MCLK GCLK GAMMA IC IC9400 10 HVDD VDD_EPI 3 3V_NORMAL PM_VCC PANEL_VCC 10 CEDS 68Pin Interface 60Hz 1 5Gbps ...

Page 20: ...s reserved Only for training and service purposes TX 8lane Main SoC SDA2 GPIO78 SCL2 GPIO79 I2C_SDA_2_BE I2C_SCL_2_BE V x 1 60Hz Tx 8 lane PANEL_VCC Data format Bit select HTPDN LOCKN MLE MSE Control signal 11 V x 1 51Pin Interface 60Hz 2 97Gbs ...

Page 21: ...hese 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 AR2 A10 700 820 530 540 521 800 570 571 500 121 120 400 LV1 LV2 200A 901 902 952 951 200P HS1 HP...

Page 22: ...nc All rights reserved Only for training and service purposes POL Front Panel Ass y POL Rear Optical Sheet Rear Side 200PPF 200PPR 200P 200PC 200SL1 200SR1 MRC use only MRC Module Repair Center IMPORTANT NOTICE EXPLODED VIEW MODULE ...

Page 23: ... All rights reserved Only for training and service purposes DISASSEMBLY GUIDE Fig 1 Fig 2 Screw 15 ea 2 Detach Tape Total Screw No 31ea 1 After Screw Disassemble please remove B C from Module Detach tape 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 ...

Page 24: ...s Inc All rights reserved Only for training and service purposes 3 Remove all sort of cable 4 IR assy WiFi PCB assy disassembly Fig 3 Fig 4 3 Disassemble screw 1ea and Remove wi fi cable Remove IR cable and Disassemble Latch 1ea ...

Page 28: ...g 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 MR15 operating checking 12 11 12 Wifi operating checking 13 13 Camera operating checking 14 14 External device recognition error 15 15 E Noise Circuit noise mechanical noise 16 16 F Exterior error Exterior defect 17 First of all Check ...

Page 29: ...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 17 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 30: ...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 17 Error symptom 2 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 31: ...ain 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 Establishe...

Page 32: ...rror 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 17 Error symptom 4 Copyright 2017 LG Electronics Inc ...

Page 33: ...DVI by connecting Jig pattern Generator Set top Box etc N Y Replace Main T con B D Screen normal Check screen condition by input External Input Component HDMI DVI Request repair for external device Component error HDMI DVI Connect other external device and cable Check normal operation of External Input Component RGB and HDMI DVI by connecting Jig pattern Generator Set top Box etc Replace Main T co...

Page 34: ...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 6 17 Error symptom 6 Stand By Red or Turn On Operating Turn Off Close Copyright 2017 LG Electronics Inc All rights reserved Only for training and ser...

Page 35: ...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 17 Error symptom Standard Repair Process 7 Abnormal 1 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service pu...

Page 36: ...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 37: ... 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 17 Error symptom Standard Repair Process 9 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 38: ...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 39: ...heck 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 11 17 Error s...

Page 40: ...ished date Revised date 12 17 Error symptom Replace MR13 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 ...

Page 41: ...ifi cable connection N Check the Wifi wafer 1pin Standard Repair Process Established date Revised date 13 17 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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 42: ...mera Ver is NULL Y N Reconnect the Camera module Standard Repair Process Established date Revised date 14 17 Error symptom 14 Change the Camera module Normal operation Close Y N Replace Main B D A25 A4 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 43: ...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 15 17 Error symptom Standard Repair Process 15 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 44: ...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 16 17 Error s...

Page 45: ...e cabinet Replace remote control Remote control damage Stand dent Replace stand F Exterior defect Exterior defect Established date Revised date 17 17 Error symptom Standard Repair Process 17 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 46: ...ecking 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 9 Exchange Main Board 1 3 A 3 11 A 5 11 10 Exchange Module 1 3 A 6 11 A 8 11 11 Exchange T Con 1 2 A 9 11 A 10 11 12 Exchange Pow...

Page 47: ... menu when there is no audio A20 18 Voltage and speaker checking method when there is no audio A21 19 D Function error Remote control operation checking method A22 20 Motion Remote operation checking method A23 21 E Etc How to use the Service remote control A24 A26 22 Check items after Main B D replacement A27 23 Adjustment Test pattern ADJ Key A28 24 How to use JIG Power B D Diganostic Smart Jig ...

Page 48: ... Check LCD back light with naked eye A Video error_No video Normal audio After turning on the power and disassembling the case check with the naked eye whether you can see light from locations A1 43 49 55 60 65 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 49: ...ideo Normal audio A2 ALL MODELS 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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 50: ...20dB etc Standard Repair Process Detail Technical Manual TUNER input signal strength checking method A Video error_Video error video lag stop ALL MODELS A3 Established date Revised date Error symptom Content A3 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 51: ...r 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 v Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 52: ...g 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 43 49 55 60 65 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 53: ...ical 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 ALL MODELS Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 54: ...1 EPI reconnection 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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 55: ...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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 56: ...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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 57: ...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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 58: ...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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 59: ...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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 60: ...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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 61: ...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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 62: ...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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 63: ...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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 64: ...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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 66: ...k front Power Indicator B Power error _No power A17 Established date Revised date Error symptom Content A17 ST BY condition On or Off Power ON condition Turn Off Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 67: ...and ST BY 3 5V B Power error _No power A18 Check the DC 13 2V Backlight Forward Voltage Symbol Values Unit Min Typ Max 43 VF 90 09 100 1 110 11 Vdc 49 101 61 112 0 124 19 55 106 38 118 2 130 2 60 122 76 136 4 150 04 65 128 34 142 6 156 86 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 68: ...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 A19 Established date Revised date Error symptom Content A19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 69: ...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 A20 Established date Revised date Error symptom Content A20 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 70: ...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 A21 Established date Revised date Error symptom Content A21 1 SPK_R FT 2 SPK_R FT 3 SPK_L FT 4 SPK_L FT Copyright 2017 LG Electronics Inc A...

Page 71: ...al Remote control operation checking method D Function error A22 Established date Revised date Error symptom Content A22 Checking order to check remote control IR EYE Sensor IR LOGO light Rear IR Eye Pin Pin name 1 VCC 2 USB_DM 3 USB_DP 4 GND 5 WOL WIFI_ON 6 VCC 7 COMBO_RESET 8 GND 9 BT_WAKEUP_DEVICE 10 BT_WAKEUP_HOST 11 GND 12 GND 13 14 15 16 EYE_SDA 17 EYE_SCL 18 GND 19 IR 20 LED_R 21 GND 22 VCC...

Page 72: ...n board 2 Check the 3 5V on the terminal 22 Checking order to check motion remote wifi Wifi BT Front Wifi BT Rear Pin Pin name 1 VCC 2 USB_DM 3 USB_DP 4 GND 5 WOL WIFI_ON 6 VCC 7 COMBO_RESET 8 GND 9 BT_WAKEUP_DEVICE 10 BT_WAKEUP_HOST 11 GND 12 GND 13 14 15 16 EYE_SDA 17 EYE_SCL 18 GND 19 IR 20 LED_R 21 GND 22 VCC 23 KEY2 24 KEY1 25 GND A23 Copyright 2017 LG Electronics Inc All rights reserved Only...

Page 73: ...to use the Service remote control D Function error A24 Established date Revised date Error symptom Content A24 0 4 1 3 0 4 1 3 1 How to access the remote control Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 74: ...Cinema 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 facto...

Page 75: ...attern 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 exte...

Page 76: ...ber 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 2017 LG Electronics Inc All rights ...

Page 77: ... 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 A28 Established date Revised date Error symptom Content A28 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 79: ...LH LJ 16Y UH 17Y SJ UJ 28Pin 24Pin 18Pin 24Pin 24Pin 24Pin 28Pin 28Pin 18Pin 28Pin 28Pin 12Pin 12Pin 28Pin 12 13 14Y Smart JIG connector applied 24Pin 24Pin NC Includes 49UJ63 Defect diagnosis Power Board Main Board 16Y OLED 17Y OLED A 29 2 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 80: ...H66 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 15Y 16Y 17Y OLED Model 16Y 17Y LED Model Existing 12Y 13Y 14Y 15Y LED models included 15Y 16Y 17Y OLED 16 17 Y LED model Power diagnosis function newly added A 29 3 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 81: ... 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 A 29 4 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 82: ...is 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 A 29 5 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purpos...

Page 83: ...r 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 A 29 6 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 84: ...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 A 29 7 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 85: ... 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 A 29 8 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 86: ...ch 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 A 29 9 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 87: ...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 A 29 10 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 88: ...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 A 29 11 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 89: ...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 A 29 12 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 90: ... 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 A 29 13 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 91: ...in 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 A 29 14 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 92: ...in 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 A 29 15 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 93: ...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 A 29 16 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 94: ...in 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 A 29 17 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 95: ... 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 A 29 18 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 96: ... 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 A 29 19 19 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

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