LG 50UK6300BUB Service Manual Download Page 28

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TROUBLE SHOOTING GUIDE

Only for training and service purposes.

Summary of Contents for 50UK6300BUB

Page 1: ...of email facsimile or other electronic means publication modification copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual The material covered by this prohibition includes without limitation any text graphics or logos in this Service Manual Copyright 2018 LG...

Page 2: ...hts 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 22 ASSEMBLY DISASSEMBLY 24 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: ...t 5 minutes prior to the adjustment 3 Test method 1 Performance LGE TV test method followed 2 Demanded other specification Safety CE IEC specification EMC CE IEC 4 General Specification No Item Specification Remark 1 Market North America 2 Broadcasting system ATSC NTSC M 64 256 QAM 3 Available Channel VHF 02 13 UHF 14 69 DTV 02 69 CATV 01 135 CADTV 01 135 4 Receiving system Digital ATSC 64 256 QAM...

Page 7: ...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 480I 5...

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: ...OUT P_TS_IN Sub MICOM X_TAL 32 768KHz I2C 1 IR KEY LOGO LIGHT Ready WIFI BT Combo USB_WIFI X_TAL 24MHz Sub Assy LAN ETHERNET SPDIF AV COMP CVBS YPbPr SPDIF OUT H P AMP RS 232 MAX323 MAIN Audio AMP I2S Out I2C 4 Vx1 51P 8 lane Vx1 EPI CEDS FCIC SPI I2C 6 EPI PMIC Level shifter M0 M1 IF_S IF GST MCLK GCLK EO I2C 6 NVRAM 256Kb I2C 4 I2C 2 EPI block IQ IP HDMI4 TS DDR3 2133 X 32 256MB X 2EA DDR3 2133 ...

Page 11: ...D HVDD EPI 3Lane 60P 55 EPI 4Lane 60P 65 EPI 3Lane 60P 55 EPI 4Lane 60P 65 GMA 1 5 9 10 13 24 18 PAD_MOD_TX_P12 LVA3 PMIC PMIC_RESET LOCKOUT12 GST E O MCLK GLCK PAD_I2S_IN_WS TCON1 GPIO PAD_I2S_IN_SD TCON2 GPIO PAD_SPDIF_IN TCON3 GPIO PAD_GPIO16 TCON4 GPIO Sub PMIC RT5093 VDD VCOM1 VCOMLFB VCOMRFB VCOM2 PAD_MOD_TX_P02 N02 P09 N09 GAMMA RT6508 BOE Only GMA 2 3 4 7 8 11 12 15 16 17 PAD_GPIO30SCK4 PA...

Page 12: ...el 1 Level 1 LCD_UHD LGD_EPI_3G V18 6lane M Level 1 Level 2 LCD_UHD LGD_EPI_3G V17 6lane M Level 1 Level 3 Level 2 Level 0 LCD_UHD BOE_CEDS_1 5 G V18 12lane RGB Level 2 Level 1 LCD_UHD BOE_CEDS_1 5 G 17Y_18Y 12lane RGBW Level 2 Level 2 Level 2 Level 3 Level 3 Level 0 LCD_UHD LGD_EPI_3G V18 8lane RGB V18 8lane LGD 65UK75 65UK63 Level 3 Level 1 LCD_UHD LGD_EPI_3G V18 8lane M Level 3 Level 2 LCD_UHD ...

Page 13: ...TX1 12 LNB 26 I2C_SCL_2 I2C_SDA_2 3 3V_NORMAL IF_P_TU IF_N_TU TU_SIF_TU TU_CVBS_TU IF_AGC_TU AL11 PAD_IP_T AM10 PAD_IM_T AM11 PAD_IFAGC_T AL12 AM12 SIF_P N Y2 PADA_CVBS0 D_Demod_Core LNB1 IC7001 LNB1_OUT 1 2K Ω 5 SCL 6 SDA 8 TONECTRL 2 LNB 33 Ω 33 Ω AG10 PAD_TGPIO2SCK1 AH10 PAD_TGPIO3SDA1 AM8 PAD_IP_S AL8 PAD_IM_S AK10 PAD_QP_S AL9 PAD_QM_S AK8 PAD_IFAGC_S AH9 PAD_GPIO26 DISEQC_OUT IF_S_IP_MAIN IF...

Page 14: ... LPF Main IC Tuner AUD_LRCH AUD_LRCK AMP_MUTE SPK_R R SPK_L L MAIN AMP IC5800 MICOM SPK L SPK R 22 26 38 CLK_I 8 WCK 7 SDATA 10 11 36 12 30 33 18 21 AV COMP HDMI2 SPDIF HP_DET AL15 PAD_GPIO21 Y3 PADA_CVBS_OUT1 SIF_P SIF_N AM12 PAD_SIFM DTV MNT_V_OUT COMP1_Y CVBS V2 PADA_GIN1P Y1 PADA_CVBS1 AV1_CVBS_DET D3 PAD_I2S_OUT_SD2 GPIO COMP1_Pb COMP1_Pr COMP1_DET W2 PADA_RIN1P v3 PADA_BIN1P C1 PAD_I2S_OUT_S...

Page 15: ...LK DDC_SCL1 DDC_SDA1 MICOM IC3000 HDMI2 0_1_5V_DET HDMI2 0_2_HPD TMDS2 D0 D1 D2 CLK DDC_SCL2 DDC_SDA2 HDMI2 0_2_5V_DET HDMI2 0_3_HPD TMDS3 D0 D1 D2 CLK DDC_SCL3 DDC_SDA3 HDMI2 0_3_5V_DET HDMI2 0_4_HPD TMDS4 D0 D1 D2 CLK DDC_SCL4 DDC_SDA4 HDMI2 0_4_5V_DET HDMI2 with ARC HDMI1 HDMI3 HDMI4 HDMI_CEC HDMI_ARC HDMI_CEC HDMI_CEC 6 HDMI2 0 ...

Page 16: ...0_2_DM DP USB3 DEBUG_RX TX Main USB2 USB2 0_3_DM DP MICOM IC3000 Wafer P200 Wafer P4000 DEBUG UART Wafer P201 5 7 9 10 15 16 19 20 SOC_RX TX DCDC OCP IC4501 5V_USB3 5V_USB3 WOL WIFI_POWER_ON COMBO_RESET BT_WAKEUP_DEVICE BT_WAKEUP_HOST IR LED_R KEY2 KEY1 DCDC OCP IC4700 DOUT1 RIN1 PHONE JACK US Only IC 7 USB WIFI M REMOTE UART Debug ...

Page 17: ...C_SDA6 EPI PMIC P7100 Vx1 51P I2C_SCL6 1 8k Ω I2C_SDA_1 I2C_SCL_1 Main IC 1 8k Ω 3 3V_NOR 1 8k Ω 1 8k Ω 3 3V_ST MICOM I2C_SDA4 I2C_SCL4 NVRAM AMP I2C_SDA2 I2C_SCL2 LNB Tuner 1 8 k Ω 1 8 k Ω 3 3V_NOR 1 8k Ω 1 8k Ω 3 3V_NOR 33 Ω 33 Ω TCON_I2C_EN 33 Ω 33 Ω 100Ω 33 Ω EPI CEDS only Vx1 only 8 I2C Map ...

Page 18: ...SB2 OCP USB2 USB_ODC3 SOC_RESET BIT0 6 HW option ADC 1 5 PCM_RESET PCMCIA OCP PCM_5V_CTL DATA_FORMAT_1 Panel DATA_FORMAT_0 VX1_MSE AGP_CTRL HTPDAn MCKL_A LOCKAn PMIC PWM_DIM2 POWER PWM_DIM L D_CLK L D_DO L D_VSYNC TCON_I2C_EN GCLK_A VID_CPU CPU DCDC VID_CPU2 VID_CORE CORE DCDC TU_RESET1 Tuner AMP_RESET_N Audio AMP1 COMP1_DET Component AV Jack HP_DET H P Jack AV1_CVBS_DET 9 GPIO ...

Page 19: ...ER_ON SOC_RESET INSTANT_BOOT OPT0 NON LOGO LCD LOGO LCD NON LOGO OLED LOGO OLED OPT1 TV NON EPI BOX TV EPI BOX OTP2 RESERVED OPT3 M16 RTK H15 MICOM_RESET MICOM X TAL X3001 32 768KHz 51P VX1 Wafer AM_MODE_DET_OLED IR KEY WIFI BT P4000 EDID_WP 3D L_DIM_EN 3 5V_ST 1 5V DCDC IC2303 POWER_ON OFF2_3 13V 3 3V NORMAL IC2300 13V 1V DCDC IC2302 POWER_ON OFF2_4 POWER_ON OFF1 13V 5V NORMAL DCDC IC2500 WIFI_EN...

Page 20: ...ce purposes LDO DCDC D13 2V 3 5V ST 4A IC2305 MICOM IR Ass y RS 232 WiFi Module FET FET Q4101 AVDD_NODIE L302 1 5V DDR 3A IC2302 SoC DDR CPU_1V0 3A IC2309 SoC VDDC_CPU FET Q1101 Panel_VCC L7601 2 L1100 AVDD33_AU33 L322 AVDD_DMPLL L333 CORE_1V0 12A IC2310 SoC VDDC LNB L7100 11 Power ...

Page 21: ... 3A IC2302 HP Amp NVRAM SPDIF OUT Pull up GAMMA IC SoC VDDP_3318_C SoC VDDP33 L319 1 8V 1A IC2307 L330 SoC EMMC1V8 EMMC VCCQ EMMC VCC L2300 Audio Amp L5801 3 3V_DEMOD L6503 3 3V_TU L6505 LNB L7001 5V NORM 4A IC2500 USB1 OCP USB2 OCP CI OCP A13 2V Audio Amp EPI_FCIC Flash L2301 L331 1 2V_DEMOD L6900 12 Power 2 ...

Page 22: ...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 200C 400 800 540 521 120 820 LV1 530 121 200P 700 A10 902 HP1 HS1 350 AR1 200T 200A 901...

Page 23: ...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 24: ...rvice purposes DISASSEMBLY GUIDE SET Cover Rear 1 Put the set facedown on the table and remove whole screw 2 Push the cover rear by one hand and pull it upward by another hand 3 Doing the step 4 at the opposite side also It is easy to pull it if you put your finger in the groove ...

Page 25: ...EMBLY GUIDE MODULE Case Top Step 1 Main PSU SPK VESA Wifi IR disassemble Step 2 S PCB Cover Shield disassemble Step 3 LCM reverse and disassemble Source PCB from Holder Step 4 Case Top Screw disassemble side screw and Case Top disassemble Rear Sliver screw 5ea top 7ea side L 5ea side R 5ea down 7ea ...

Page 26: ...y for training and service purposes Step 5 Panel disassemble Step 6 Guide Panel disassemble Step 7 Optical Sheet disassemble DS Prism middle Prism down DP Step 8 DPS LED Fixer disassemble Reflector Sheet disassemble rotate DPS 6ea push LED fixer in back 3ea ...

Page 27: ... 1 Attach the Double Tape 1 Attach the Double Tape in Guide Line of Cover Bottom 3ea 2 Remove the protect film of Double Tape Step 2 Attach the LED Array 1 Attach the LED Array to the round hole on Cover Bottom embo 2 Press the LED Array on the surface of Cover Bottom 3 Connect the CNT to the LED Array C Bottom Guide Line Finish the Attached Double Tape 3ea NG OK Required LED Array Quantity Inch 4...

Page 29: ...f while viewing power auto on off 7 8 8 C Audio error No audio Normal video 9 9 Wrecked audio discontinuation noise 10 10 D Function error Remote control Local switch checking 11 MR remote operating checking 12 11 12 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 all Check whether there...

Page 30: ...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 16 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 31: ...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 16 Error symptom 2 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 32: ...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 33: ...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 16 Error symptom 4 Copyright 2018 LG Electronics Inc All r...

Page 34: ...y connecting Jig pattern Generator Set top Box etc N Y Replace Main T con B D Screen normal Check screen condition by input External Input Component HDMI DVI Request repair for external device Component error HDMI DVI Connect other external device and cable Check normal operation of External Input Component RGB and HDMI DVI by connecting Jig pattern Generator Set top Box etc Replace Main T con B D...

Page 35: ...oltage of each output of Power B D N Y Normal voltage Replace Main B D Y OK Replace Main B D N Y Normal Check ST BY 3 5V Replace Power B D N Y Normal voltage Replace Power B D Y A17 A18 A18 A18 Standard Repair Process Established date Revised date 6 16 Error symptom 6 Stand By Red or Turn On Operating Turn Off Close Copyright 2018 LG Electronics Inc All rights reserved Only for training and servic...

Page 36: ...phase out Check A C cord Check for all 3 phase power out Check outlet Replace Main B D CPU Abnormal Replace Power B D N Y Normal End Established date Revised date 7 16 Error symptom Standard Repair Process 7 Abnormal 1 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 37: ...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 38: ... 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 16 Error symptom Standard Repair Process 9 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 39: ...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 40: ...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 16 Error s...

Page 41: ...lished date Revised date 12 16 Error symptom Replace MR18 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 MR18 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 Copyrig...

Page 42: ...ifi cable connection N Check the Wifi wafer 1pin Standard Repair Process Established date Revised date 13 16 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 2018 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 14 16 Error symptom Standard Repair Process 15 Copyright 2018 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 15 16 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 16 16 Error symptom Standard Repair Process 17 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 46: ...cking 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 9 Appendix Defected Type caused by T Con Inverter Module Check Cable 1 2 A 1 11 A 2 11 10 Exchange Main Board 1 3 A 3 11 A 5 11 11 Exchange Module 1 3 A 6 11 A 8 11 12 Exchange T Con 1 2 A 9 11 A 10 11 13 Exchange Pow...

Page 47: ... menu when there is no audio A21 18 Voltage and speaker checking method when there is no audio A22 19 D Function error Remote control operation checking method A23 20 Motion Remote operation checking method A24 21 E Etc How to use the Service remote control A25 A27 22 Check items after Main B D replacement A28 23 Adjustment Test pattern ADJ Key A29 24 How to use JIG Power B D Diganostic Smart Jig ...

Page 48: ... Content 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 Copyright 2018 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 2018 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 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 51: ...or video lag stop 1 Checking method for remote control for adjustment Press the IN START with the remote control for adjustment Version ALL MODELS A4 Established date Revised date Error symptom Content A4 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 52: ...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 2018 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 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 54: ...nnection 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 2018 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 2018 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 2018 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 2018 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 2018 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 2018 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 2018 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 2018 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 2018 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 2018 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 2018 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 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 67: ...me mode MS 3V 2 75 3 25 On Store Mode Power Check Sequence 1 AC input Check SK100 100 240Vac 2 PWR ON Check SET On above 3V SET St by 0V 3 13 2V DC Check SET On 13 2V SET St by 7 8V 4 MS Level Check MS 5 LED voltage Check P801 Pin 1 7 Home mode General Customer Store mode use Store Picture Condition VIVID Back light 100 Min Max 61 2V 74 8V SK100 AC input P801 P201 all condition meets Power Board O...

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 A20 Established date Revised date Error symptom Content A20 Copyright 2018 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 A21 Established date Revised date Error symptom Content A21 Copyright 2018 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 A22 Established date Revised date Error symptom Content A22 1 SPK_R FT 2 SPK_R FT 3 SPK_L FT 4 SPK_L FT Copyright 2018 LG Electronics Inc A...

Page 71: ...al Remote control operation checking method D Function error A23 Established date Revised date Error symptom Content A23 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: ...the terminal 22 Checking order to check motion remote wifi Wifi BT Front Wifi BT Rear Pin Pin name 1 3 5V_WIFI 2 WIFI_DM_JACK 3 WIFI_DP_JACK 4 5 WOL WIFI_POWER_ON_JACK 6 3 5V_WIFI 7 COMBO_RESET_JACK 8 9 BT_WAKEUP_DEVICE_JACK 10 BT_WAKEUP_HOST_JACK 11 12 13 14 15 16 EYE_SDA_JACK 17 EYE_SCL_JACK 18 19 IR_JACK 20 LED_R_JACK 21 22 3 5V_ST 23 KEY2_JACK 24 KEY1_JACK 25 A24 Copyright 2018 LG Electronics ...

Page 73: ...to use the Service remote control D Function error A25 Established date Revised date Error symptom Content A25 0 4 1 3 0 4 1 3 1 How to access the remote control Copyright 2018 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 2018 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 A29 Established date Revised date Error symptom Content A29 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 79: ...4Pin 24Pin 24Pin 28Pin 28Pin 18Pin 28Pin 28Pin 12Pin 12Pin 28Pin 24Pin 24Pin NC Includes 49UJ63 Defect diagnosis Power Board Main Board 16Y OLED 17Y OLED A30 2 19 SK85 SK96 SK95 SK99 UK63 UK64 UK65 New JIG OLD JIG Cable Connection 18 Marking check No Marking 24 Marking Check 15Y OLED C8 32LK62 43 49LK61 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 80: ...LED SJ95 UJ98 SJ85 UJ94 SJ80 UJ77 UJ75 UJ78 UJ65 UJ68 UJ63 UJ67 LJ61 LJ68 LJ55 LJ58 18 LED SK95 SK85 SK81 SK80 UK63 UK64 UK65 32LK62 43 49LK61 18 OLED C8 15Y 16Y 17Y OLED Model 16Y 17Y 18Y LED Model Existing 12Y 13Y 14Y 15Y LED models included 15Y 16Y 17Y 18Y OLED 16 17 18 Y LED model Power diagnosis function newly added A30 3 19 Copyright 2018 LG Electronics Inc All rights reserved Only for train...

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 A30 4 19 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 82: ...sis 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 A30 5 19 Copyright 2018 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 A30 6 19 Copyright 2018 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 A30 7 19 Copyright 2018 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 A30 8 19 Copyright 2018 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 A30 9 19 Copyright 2018 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 A30 10 19 Copyright 2018 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 A30 11 19 Copyright 2018 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 A30 12 19 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 90: ...l 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 A30 13 19 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 91: ...ain 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 A30 14 19 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 92: ...ain 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 A30 15 19 Copyright 2018 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 A30 16 19 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 94: ...ain 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 A30 17 19 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 95: ...n 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 A30 18 19 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 96: ...n 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 A30 19 19 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 97: ... 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 A29 Established date Revised date Error symptom Content A29 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 98: ...4 25 15 75 9 VGH EVEN 28V 15V 26 60 14 25 29 40 15 75 10 VGH ODD 28V 15V 26 60 14 25 29 40 15 75 11 PM VCC 5V 4 75 5 25 12 LS VGL 15V 14 25 15 75 13 HVDD 8 23V 7 82 8 64 14 VDD EPI 16 8V 15 96 17 64 PCB Test Point Unit Volt Test Spec PM VDD EPI HVDD LS VGL PM VCC VGH LS VGL P VGL VCOM1 VTERM VCOM2 VST VGH EVEN VGH ODD VCC18 Mode Name 55UK63xxPSx Test Point and Volt Spec Copyright 2018 LG Electroni...

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