LG 49LF620V Service Manual Download Page 22

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Trouble shooting guide

Only for training and service purposes

LGE Internal Use Only

Summary of Contents for 49LF620V

Page 1: ...ODEL 49LF620V 49LF620V ZB CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL LED TV SERVICE MANUAL North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only ...

Page 2: ...ights reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 11 BLOCK DIAGRAM 17 EXPLODED VIEW 21 SCHEMATIC CIRCUIT DIAGRAM APPENDIX TROUBLE SHOOTING GUIDE APPENDIX ...

Page 3: ...inals etc to be sure the 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 m...

Page 4: ...ctrostatic charge on your body by touching a known earth ground Alter natively obtain and wear a commercially available discharg ing wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent e...

Page 5: ...he solder joints 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 replace...

Page 6: ...UK Italy Germany France Spain Sweden Finland Neth erlands Belgium Luxemburg Greece Denmark Czech Austria Hungary Swiss Croatia TurkeyNorway Slovenia Poland Ukraine Portugal Ireland Morocco Latvia Estonia Lithania Rumania Bulgaria Russia SlovakiaBosnia Serbia Albania Kazakhstan Belarus DTV MPEG2 4 DVB T2 8 countries UK Denmark Sweden Finland Norway Ireland Ukraine Kazakhstan DTV MPEG2 4 DVB C 37 co...

Page 7: ...Modulation 16QAM 64 QAM 128 QAM and 256 QAM DVB S S2 symbolrate DVB S2 8PSK QPSK 2 45Msymbol s DVB S QPSK 2 45Msymbol s viterbi DVB S mode 1 2 2 3 3 4 5 6 7 8 DVB S2 mode 1 2 2 3 3 4 3 5 4 5 5 6 8 9 9 10 4 Scart Jack 1EA PAL SECAM Scart 1 Jack is Full scart and support RF OUT analog EU only 5 Component AV Common port 1EA Video Input RCA PAL SECAM NTSC 4 System PAL SECAM NTSC PAL60 Component Input ...

Page 8: ... 50 60 00 27 027 SDTV 480P 6 720 480 31 47 59 94 27 00 SDTV 480P 7 1280 720 37 50 50 00 74 25 HDTV 720P 8 1280 720 45 00 60 00 74 25 HDTV 720P 9 1280 720 44 96 59 94 74 176 HDTV 720P 10 1920 1080 28 12 50 00 74 25 HDTV 1080I 11 1920 1080 33 75 60 00 74 25 HDTV 1080I 12 1920 1080 33 72 59 94 74 176 HDTV 1080I 13 1920 1080 56 25 50 00 148 50 HDTV 1080P 14 1920 1080 67 50 60 00 148 50 HDTV 1080P 15 1...

Page 9: ...V 1080P O FHD only DTV 1 640 480 31 46 59 94 25 125 SDTV 480P 2 640 480 31 50 60 00 25 125 SDTV 480P 3 720 480 31 47 59 94 27 00 SDTV 480P 4 720 480 31 50 60 00 27 027 SDTV 480P 5 720 576 31 25 50 00 27 00 SDTV 576P DVB 6 1280 720 37 50 50 00 74 25 HDTV 720P DVB 7 1280 720 45 00 60 00 74 25 HDTV 720P 8 1280 720 44 96 59 94 74 176 HDTV 720P 9 1920 1080 28 12 50 00 74 25 HDTV 1080I DVB 10 1920 1080 ...

Page 10: ... HDTV 1080P Side by Side half Top and Bottom 8 1920 1080 33 70 30 89 1 HDTV 1080P Side by Side half Top and Bottom 9 1920 1080 53 95 54 23 98 24 148 35 148 5 HDTV 1080P Frame packing 10 1920 1080 56 30 50 148 5 HDTV 1080P Side by Side half Top and bottom Single frame sequential 11 1920 1080 67 50 60 148 5 HDTV 1080P Side by Side half Top and bottom Single frame sequential 6 2 DTV Input No Resoluti...

Page 11: ...nnection between computer jig and set 5 Click Auto tab and set as below 6 Click Run 7 After downloading check OK message USB DOWNLOAD 1 Put the USB Stick to the USB socket 2 Automatically detecting update file in USB Stick If your downloaded program version in USB Stick is Low it didn t work But your downloaded version is High USB data is automatically detecting 3 Show the message Copying files fr...

Page 12: ...0 Automatically adjustment The use of a internal pattern MODEL Tool Option1 Tool Option2 Tool Option3 Tool Option4 Tool Option5 Tool Option6 42LF620V ZB 107 2503 6850 50528 1538 2320 0 1 2 3 4 5 6 7 8 9 A B C D E F 00 00 FF FF FF FF FF FF 00 1E 6D a b 10 c 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26 20 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80 30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C...

Page 13: ...ULL Dynamic Range of Module Mode Temp Coordinate spec Target Cool 13 000 K X 0 271 0 002 Y 0 270 0 002 X 0 278 Y 0 280 Medium 9 300 K X 0 286 0 002 Y 0 289 0 002 X 0 293 Y 0 299 Warm 6 500 K X 0 313 0 002 Y 0 329 0 002 X 0 320 Y 0 339 NetCase5 Aging time Min Cool Medium Warm x y x y x y 271 270 286 289 313 329 1 0 2 282 289 297 308 324 348 2 3 5 281 287 296 306 323 346 3 6 9 279 284 294 303 321 34...

Page 14: ... Adjust x value by decreasing the G After you finished all adjustments Press In start key and compare Tool option and Area option value with its BOM if it is correctly same then unplug the AC cable If it is not same then correct it same with BOM and unplug AC cable For correct it to the model s module from factory Jig model Push the IN STOP key after completing the function inspection And Mechanic...

Page 15: ...F ADL EEPROM Sub Address low 00 FF Data Write data CS CMD LENGTH ADH ADL Data_1 Data_n Delay 20ms 6 2 Command Set Description FOS Default write 7mode data write Vtotal V_Frequency Sync_Polarity Htotal Hstart Vstart 0 Phase Data write Model Name and Serial Number write in EEPROM 6 3 Method notice 1 Serial number D L is using of scan equipment 2 Setting of scan equipment operated by Manufacturing Te...

Page 16: ...click 1 Push the 2 MAC Address write At success Download check the OK 3 Start CI Key Download Push the 4 Check the OK or NG 7 2 LAN Inspection 7 2 1 Equipment Condition Each other connection to LAN Port of IP Hub and Jig 7 2 2 LAN inspection solution LAN Port connection with PCB Network setting at MENU Mode of TV Setting automatic IP Setting state confirmation If automatic setting is finished you ...

Page 17: ...RXB4 RXBCK SPK_R SPK_L AMP_SCL SDA AUD_MASTER_CLK AUD_LRCH AUD_LRCK AUD_SCK TAS5733 IC5600 Connector P4600 Jog KEY LED_R IR HDMI1 JK800 SPDIF_OUT SPDIF Optic JK1001 except LF54 USB JK700 HDMI2 JK801 CK D0 D1 D2 _HDMI4 DM DP USB1_OCP CTL SN1406035RGER 5V_USB HP_L ROUT Headphone JK3000 Only LF62 57 56 DDR3 SDRAM IC1201 128MB B MDQL 0 7 B MDQU 0 7 NAND FLASH IC102 1Gbit H27U1G8F2CTR BC PCM_A 0 7 T4LC...

Page 18: ...RXA4 RXACK RXB0 RXB4 RXBCK SPK_R SPK_L AMP_SCL SDA AUD_MASTER_CLK AUD_LRCH AUD_LRCK AUD_SCK TAS5733 IC5600 Connector P4600 Jog KEY LED_R IR HDMI1 JK800 SPDIF_OUT SPDIF Optic JK1001 except LF54 USB JK700 HDMI2 JK801 CK D0 D1 D2 _HDMI4 DM DP USB1_OCP CTL SN1406035RGER 5V_USB HP_L ROUT Headphone JK3000 Only LF62 57 56 NAND FLASH IC102 1Gbit H27U1G8F2CTR BC PCM_A 0 7 T4LCX244FT Buffer TS_DATA 0 7 PCM_...

Page 19: ...D_MASTER_CLK AUD_LRCH AUD_LRCK AUD_SCK TAS5733 IC5600 Connector P4600 HDMI1 JK800 F SCART JK2801 SPDIF_OUT SPDIF Optic JK1001 except LF54 USB JK700 HDMI2 JK801 CK D0 D1 D2 _HDMI4 DM DP USB1_OCP CTL SN1406035RGER 5V_USB HP_L ROUT Headphone JK3000 Only LF62 57 56 NAND FLASH IC102 1Gbit H27U1G8F2CTR BC PCM_A 0 7 T4LCX244FT Buffer TS_DATA 0 7 PCM_DATA 0 7 EPHY_TP TN RP RN LAN JK2100 Only UK COMPONENT ...

Page 20: ...XB4 RXBCK SPK_R SPK_L AMP_SCL SDA AUD_MASTER_CLK AUD_LRCH AUD_LRCK AUD_SCK TAS5733 IC5600 Connector P4600 HDMI1 JK4200 F SCART JK2801 SPDIF_OUT SPDIF Optic JK1001 except LF54 USB JK700 HDMI2 JK4201 CK D0 D1 D2 _HDMI4 DM DP USB1_OCP CTL SN1406035RGER 5V_USB HP_L ROUT Headphone JK3000 Only LF62 57 56 NAND FLASH IC102 1Gbit H27U1G8F2CTR BC PCM_A 0 7 T4LCX244FT Buffer TS_DATA 0 7 PCM_DATA 0 7 COMPONEN...

Page 21: ...ctrical and mechanical parts in this chassis have special safety related characteristics These parts are identified by in the Schematic Diagram and 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 IMPORTAN...

Page 23: ... viewing power auto on off 8 8 C Audio error No audio Normal video 9 9 Wrecked audio discontinuation noise 10 10 D Function error Remote control Local switch checking 11 11 External device recognition error 12 12 E Noise Circuit noise mechanical noise 13 13 F Exterior error Exterior defect 14 First of all Check whether there is SVC Bulletin in GCSC System for these model Contents of Standard Repai...

Page 24: ...ore replacing the Main Board Replace Main Board Re enter White Balance value Precaution Established date Standard Repair Process Revised date 1 14 Error symptom A Video error No video Normal audio A4 A1 A2 A6 A3 First of all Check whether all of cables between board is inserted properly or not Main B D Power B D LVDS Cable Speaker Cable IR B D Cable Normal Audio On Y N Normal Voltage Normal Voltag...

Page 25: ...B D Replace Power Board and repair parts Standard Repair Process A Video error No video No audio A4 Established date Revised date 2 14 End Normal Voltage Y N Error symptom Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 26: ...er By using Diagnostics menu on OSD Menu Customer Support red button on remote control Signal Test Signal strength Normal over 50 Signal quality Normal over 50 Y Contact with signal distributor or broadcaster Cable or Air N N Y N A6 Standard Repair Process Established date Revised date 3 14 End Normal Signal Normal Picture Normal Picture Normal Picture SVC Bulletin End End Normal Picture Tuning fa...

Page 27: ...tting match with installed ANT N Y N A6 Standard Repair Process Established date Revised date 4 14 Check satellite setting Check LNB frequency Check satellite Check Satellite connection DiSEqC motor etc Contact with signal distributor or broadcaster Cable or Air N Check Tuner soldering Replace Main B D Normal Picture End Normal Picture Normal Setting SVC Bulletin Normal Signal End End Error sympto...

Page 28: ... B D Replace Main B D N N A Video error Color error A7 N Y Replace module Request repair for external device cable Check Test pattern A10 A8 A9 Standard Repair Process Established date Revised date 5 14 End Color error Color error External device Cable Normal External Input Component error HDMI error Error symptom External device Cable Normal Copyright 2015 LG Electronics Inc All rights reserved O...

Page 29: ...ce Main B D Check screen condition by input External Input Component HDMI DVI Request repair for external device Connect other external device and cable Check normal operation of External Input Component HDMI by connecting Jig pattern Generator Set top Box etc Replace Main B D N Y Check S W Version Y N S W Upgrade Y N Y N Replace Main B D Replace Module Established date Revised date 6 14 Standard ...

Page 30: ...each output of Power B D N Y Replace Main B D Y Replace Main B D N Y Check ST BY 3 5V Replace Power B D N Replace Power B D Y A11 A12 A13 A4 Standard Repair Process Established date Revised date 7 14 Stand By Red End Power LED On Normal Voltage Normal Voltage Normal Operati on Error symptom Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Us...

Page 31: ...f by OFF TIMER POWEROFF_SLEEPTIMER Power off by SLEEP TIMER POWEROFF_INSTOP Power off by INSTOP KEY POWEROFF_AUTOOFF Power off by AUTO OFF POWEROFF_ONTIMER Power off by ON TIMER POWEROFF_RS232C Power off by RS232C POWEROFF_RESREC Power off by Reservated Record POWEROFF_RECEND Power off by End of Recording POWEROFF_SWDOWN Power off by S W Download POWEROFF_UNKNOWN Power off by unknown status except...

Page 32: ...parts Check Speaker connection N Y Replace Speaker Replace Main Board C Audio error No audio Normal video A15 A16 Established date Revised date 9 14 Standard Repair Process End Normal Voltage TV Speaker Disconn ection Error symptom Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 33: ...ovider Y Check audio Voltage 13 2V In case of External Input signal error Check and fix external device Replace Main B D N Established date Revised date 10 14 Standard Repair Process A16 End Signal Normal Normal Voltage Normal Audio Wrecked Audio Discontinuation Noise for all audio Wrecked Audio Discontinuation Noise only for D TV Wrecked Audio Discontinuation Noise only for Analog Wrecked Audio D...

Page 34: ...air Cable connection Connector solder Check 3 5V On Main B D A17 N N Check 13 2V on Power B D Replace Main B D Power B D don t have problem A4 Check IR Output signal N Y Repair Replace IR B D N A17 Replace Main B D Y A17 Standard Repair Process Established date Revised date 11 14 End Normal Operating Normal Voltage Normal Signal Normal Operating Normal Operating End Y Error symptom Copyright 2015 ...

Page 35: ...h technical information D Function error External device recognition error Established date Revised date 12 14 Standard Repair Process Signal Input Technical information External Input And Component Recognition error HDMI Optical Recognition error Error symptom Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 36: ...els without any fix information provide the description OR Mechanical noise is a natural phenomenon and apply the 1st level description When the customer does not agree apply the process by stage Describe the basis of the description in Part related to nose in the Owner s Manual E Noise Circuit noise mechanical noise Established date Revised date 13 14 Standard Repair Process Circuit noise Mechani...

Page 37: ... stand F Exterior defect Exterior defect Established date Revised date 14 14 Standard Repair Process Module damage Cabinet damage Remote Controller damage Stand damage Error symptom Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 38: ...nection diagram A7 10 Check Link Cable LVDS reconnection condition A8 A9 11 Adjustment Test pattern ADJ Key A10 12 13 A Video error_Vertical Horizontal bar residual image light spot Connection diagram A8 14 Check Link Cable LVDS reconnection condition A8 A9 15 Adjustment Test pattern ADJ Key A10 16 Appendix Defected Type caused by T Con Inverter Module Exchange T Con Board 1 A 1 5 17 Exchange T Co...

Page 39: ... Normal video Checking method in menu when there is no audio A15 29 Voltage and speaker checking method when there is no audio A16 30 C Audio error_Wrecked audio discontinuation Voltage and speaker checking method in case of audio error A16 31 D Function error_ No response in remote controller key error Remote controller operation checking method A17 Contents of Standard Repair Process Detail Tech...

Page 40: ...On with naked eye A Video error_No video Normal audio A1 Established date Revised date Error symptom Content Power On disjoint back case check lighting Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 41: ...d date Revised date 1 Measure DC Voltage applying to LED backlight from Power Board 2 Output DC Voltage from Power Board supply to LED backlight Check Pin contacting statement and connection statement Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 42: ...f Color Temp Cool Medium Warm re enter the value after replacing the MAIN BOARD Standard Repair Process Detail Technical Manual Check White Balance value A Video error_No video Normal audio A3 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 43: ...te Revised date Check D 13 2V A13 2V 4 8 PIN 12 Pin Power Board Main Board SMH200 H12S4 1 Power on 2 PDIM 2 3 GND 4 D 13 2V 5 D 13 2V 6 D 13 2V 7 A 13 2V 8 A 13 2V 9 GND 10 GND 11 DRV_ON 12 PDIM 1 Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 44: ...15dB 20dB etc Standard Repair Process Detail Technical Manual TUNER input signal strength checking method A Video error_Video error video lag stop A5 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 45: ...ideo lag stop Checking SW version method for remote controller for adjustment Press the IN START with the remote controller for adjustment A6 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 46: ...ical Horizontal bar residual image light spot As the part connecting to the external input check the screen condition by signal A7 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 47: ...ocess Detail Technical Manual Check and replace Link Cable LVDS and contact condition A Video error_Color error A8 A9 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 48: ... 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 A10 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 49: ...n Solder defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Abnormal Power Section Solder defect Short Crack Abnormal Power Section Solder defect Short Crack Appendix Exchange T Con Board 1 Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 50: ...ower Section Solder defect Short Crack Fuse Open Abnormal power section Noise GRADATION GRADATION Abnormal Display Appendix Exchange T Con Board 2 Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 51: ...Press damage Crosstalk Crosstalk Press damage Panel Mura Light leakage Press damage Un repairable Cases In this case please exchange the module Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 52: ...lock Source TAB IC Defect Horizontal Block Gate TAB IC Defect Horizontal line Gate TAB IC Defect Gate TAB IC Defect Horizontal Block Gate TAB IC Defect Appendix Exchange the Module 2 Un repairable Cases In this case please exchange the module Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 53: ...LED B Power error _No power A11 Established date Revised date ST BY condition Red Front LED control Menu Option Standby Light On Off Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 54: ...date Revised date Check D 13 2V 4 5 6 PIN 12 Pin Power Board Main Board SMH200 H12S4 1 Power on 2 PDIM 2 3 GND 4 D 13 2V 5 D 13 2V 6 D 13 2V 7 A 13 2V 8 A 13 2V 9 GND 10 GND 11 DRV_ON 12 PDIM 1 Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 55: ...ate Check power on Pin 1 pin is high about 3 3V 12 Pin Power Board Main Board SMH200 H12S4 1 Power on 2 PDIM 2 3 GND 4 D 13 2V 5 D 13 2V 6 D 13 2V 7 A 13 2V 8 A 13 2V 9 GND 10 GND 11 DRV_ON 12 PDIM 1 Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 56: ...ustment item 3 Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing A14 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 57: ... Speaker Check Standard Repair Process Detail Technical Manual Checking method in menu when there is no audio C Audio error_No audio Normal video A15 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 58: ...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 A16 Established date Revised date 12 Pin Power Board Main Board SMH200 H12S4 1 Power on 2 PDIM 2 3 GND 4 D 13 2V 5 D 13 2V 6 D 13 2V 7 A 13 2V 8 A 13 2V 9 GND 10 GND 11 DRV_ON 12 PDIM 1 Error symptom Content...

Page 59: ... normal when the Analog Tester needle moves slowly and defective when it does not move at all Standard Repair Process Detail Technical Manual Remote controller operation checking method D Function error_ No response in remote controller key error A17 Established date Revised date P4600 Sub Ass y Main Ass y Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for trainin...

Page 60: ......

Page 62: ... viewing power auto on off 8 8 C Audio error No audio Normal video 9 9 Wrecked audio discontinuation noise 10 10 D Function error Remote control Local switch checking 11 11 External device recognition error 12 12 E Noise Circuit noise mechanical noise 13 13 F Exterior error Exterior defect 14 First of all Check whether there is SVC Bulletin in GCSC System for these model Contents of Standard Repai...

Page 63: ...ore replacing the Main Board Replace Main Board Re enter White Balance value Precaution Established date Standard Repair Process Revised date 1 14 Error symptom A Video error No video Normal audio A4 A1 A2 A6 A3 First of all Check whether all of cables between board is inserted properly or not Main B D Power B D LVDS Cable Speaker Cable IR B D Cable Normal Audio On Y N Normal Voltage Normal Voltag...

Page 64: ...B D Replace Power Board and repair parts Standard Repair Process A Video error No video No audio A4 Established date Revised date 2 14 End Normal Voltage Y N Error symptom Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 65: ...er By using Diagnostics menu on OSD Menu Customer Support red button on remote control Signal Test Signal strength Normal over 50 Signal quality Normal over 50 Y Contact with signal distributor or broadcaster Cable or Air N N Y N A6 Standard Repair Process Established date Revised date 3 14 End Normal Signal Normal Picture Normal Picture Normal Picture SVC Bulletin End End Normal Picture Tuning fa...

Page 66: ...tting match with installed ANT N Y N A6 Standard Repair Process Established date Revised date 4 14 Check satellite setting Check LNB frequency Check satellite Check Satellite connection DiSEqC motor etc Contact with signal distributor or broadcaster Cable or Air N Check Tuner soldering Replace Main B D Normal Picture End Normal Picture Normal Setting SVC Bulletin Normal Signal End End Error sympto...

Page 67: ... B D Replace Main B D N N A Video error Color error A7 N Y Replace module Request repair for external device cable Check Test pattern A10 A8 A9 Standard Repair Process Established date Revised date 5 14 End Color error Color error External device Cable Normal External Input Component error HDMI error Error symptom External device Cable Normal Copyright 2015 LG Electronics Inc All rights reserved O...

Page 68: ...ce Main B D Check screen condition by input External Input Component HDMI DVI Request repair for external device Connect other external device and cable Check normal operation of External Input Component HDMI by connecting Jig pattern Generator Set top Box etc Replace Main B D N Y Check S W Version Y N S W Upgrade Y N Y N Replace Main B D Replace Module Established date Revised date 6 14 Standard ...

Page 69: ...each output of Power B D N Y Replace Main B D Y Replace Main B D N Y Check ST BY 3 5V Replace Power B D N Replace Power B D Y A11 A12 A13 A4 Standard Repair Process Established date Revised date 7 14 Stand By Red End Power LED On Normal Voltage Normal Voltage Normal Operati on Error symptom Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Us...

Page 70: ...f by OFF TIMER POWEROFF_SLEEPTIMER Power off by SLEEP TIMER POWEROFF_INSTOP Power off by INSTOP KEY POWEROFF_AUTOOFF Power off by AUTO OFF POWEROFF_ONTIMER Power off by ON TIMER POWEROFF_RS232C Power off by RS232C POWEROFF_RESREC Power off by Reservated Record POWEROFF_RECEND Power off by End of Recording POWEROFF_SWDOWN Power off by S W Download POWEROFF_UNKNOWN Power off by unknown status except...

Page 71: ...parts Check Speaker connection N Y Replace Speaker Replace Main Board C Audio error No audio Normal video A15 A16 Established date Revised date 9 14 Standard Repair Process End Normal Voltage TV Speaker Disconn ection Error symptom Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 72: ...ovider Y Check audio Voltage 13 2V In case of External Input signal error Check and fix external device Replace Main B D N Established date Revised date 10 14 Standard Repair Process A16 End Signal Normal Normal Voltage Normal Audio Wrecked Audio Discontinuation Noise for all audio Wrecked Audio Discontinuation Noise only for D TV Wrecked Audio Discontinuation Noise only for Analog Wrecked Audio D...

Page 73: ...air Cable connection Connector solder Check 3 5V On Main B D A17 N N Check 13 2V on Power B D Replace Main B D Power B D don t have problem A4 Check IR Output signal N Y Repair Replace IR B D N A17 Replace Main B D Y A17 Standard Repair Process Established date Revised date 11 14 End Normal Operating Normal Voltage Normal Signal Normal Operating Normal Operating End Y Error symptom Copyright 2015 ...

Page 74: ...h technical information D Function error External device recognition error Established date Revised date 12 14 Standard Repair Process Signal Input Technical information External Input And Component Recognition error HDMI Optical Recognition error Error symptom Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 75: ...els without any fix information provide the description OR Mechanical noise is a natural phenomenon and apply the 1st level description When the customer does not agree apply the process by stage Describe the basis of the description in Part related to nose in the Owner s Manual E Noise Circuit noise mechanical noise Established date Revised date 13 14 Standard Repair Process Circuit noise Mechani...

Page 76: ... stand F Exterior defect Exterior defect Established date Revised date 14 14 Standard Repair Process Module damage Cabinet damage Remote Controller damage Stand damage Error symptom Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 77: ...nection diagram A7 10 Check Link Cable LVDS reconnection condition A8 A9 11 Adjustment Test pattern ADJ Key A10 12 13 A Video error_Vertical Horizontal bar residual image light spot Connection diagram A8 14 Check Link Cable LVDS reconnection condition A8 A9 15 Adjustment Test pattern ADJ Key A10 16 Appendix Defected Type caused by T Con Inverter Module Exchange T Con Board 1 A 1 5 17 Exchange T Co...

Page 78: ... Normal video Checking method in menu when there is no audio A15 29 Voltage and speaker checking method when there is no audio A16 30 C Audio error_Wrecked audio discontinuation Voltage and speaker checking method in case of audio error A16 31 D Function error_ No response in remote controller key error Remote controller operation checking method A17 Contents of Standard Repair Process Detail Tech...

Page 79: ...On with naked eye A Video error_No video Normal audio A1 Established date Revised date Error symptom Content Power On disjoint back case check lighting Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 80: ...d date Revised date 1 Measure DC Voltage applying to LED backlight from Power Board 2 Output DC Voltage from Power Board supply to LED backlight Check Pin contacting statement and connection statement Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 81: ...f Color Temp Cool Medium Warm re enter the value after replacing the MAIN BOARD Standard Repair Process Detail Technical Manual Check White Balance value A Video error_No video Normal audio A3 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 82: ...te Revised date Check D 13 2V A13 2V 4 8 PIN 12 Pin Power Board Main Board SMH200 H12S4 1 Power on 2 PDIM 2 3 GND 4 D 13 2V 5 D 13 2V 6 D 13 2V 7 A 13 2V 8 A 13 2V 9 GND 10 GND 11 DRV_ON 12 PDIM 1 Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 83: ...15dB 20dB etc Standard Repair Process Detail Technical Manual TUNER input signal strength checking method A Video error_Video error video lag stop A5 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 84: ...ideo lag stop Checking SW version method for remote controller for adjustment Press the IN START with the remote controller for adjustment A6 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 85: ...ical Horizontal bar residual image light spot As the part connecting to the external input check the screen condition by signal A7 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 86: ...ocess Detail Technical Manual Check and replace Link Cable LVDS and contact condition A Video error_Color error A8 A9 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 87: ... 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 A10 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 88: ...n Solder defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Abnormal Power Section Solder defect Short Crack Abnormal Power Section Solder defect Short Crack Appendix Exchange T Con Board 1 Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 89: ...ower Section Solder defect Short Crack Fuse Open Abnormal power section Noise GRADATION GRADATION Abnormal Display Appendix Exchange T Con Board 2 Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 90: ...Press damage Crosstalk Crosstalk Press damage Panel Mura Light leakage Press damage Un repairable Cases In this case please exchange the module Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 91: ...lock Source TAB IC Defect Horizontal Block Gate TAB IC Defect Horizontal line Gate TAB IC Defect Gate TAB IC Defect Horizontal Block Gate TAB IC Defect Appendix Exchange the Module 2 Un repairable Cases In this case please exchange the module Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 92: ...LED B Power error _No power A11 Established date Revised date ST BY condition Red Front LED control Menu Option Standby Light On Off Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 93: ...date Revised date Check D 13 2V 4 5 6 PIN 12 Pin Power Board Main Board SMH200 H12S4 1 Power on 2 PDIM 2 3 GND 4 D 13 2V 5 D 13 2V 6 D 13 2V 7 A 13 2V 8 A 13 2V 9 GND 10 GND 11 DRV_ON 12 PDIM 1 Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 94: ...ate Check power on Pin 1 pin is high about 3 3V 12 Pin Power Board Main Board SMH200 H12S4 1 Power on 2 PDIM 2 3 GND 4 D 13 2V 5 D 13 2V 6 D 13 2V 7 A 13 2V 8 A 13 2V 9 GND 10 GND 11 DRV_ON 12 PDIM 1 Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 95: ...ustment item 3 Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing A14 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 96: ... Speaker Check Standard Repair Process Detail Technical Manual Checking method in menu when there is no audio C Audio error_No audio Normal video A15 Established date Revised date Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 97: ...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 A16 Established date Revised date 12 Pin Power Board Main Board SMH200 H12S4 1 Power on 2 PDIM 2 3 GND 4 D 13 2V 5 D 13 2V 6 D 13 2V 7 A 13 2V 8 A 13 2V 9 GND 10 GND 11 DRV_ON 12 PDIM 1 Error symptom Content...

Page 98: ... normal when the Analog Tester needle moves slowly and defective when it does not move at all Standard Repair Process Detail Technical Manual Remote controller operation checking method D Function error_ No response in remote controller key error A17 Established date Revised date P4600 Sub Ass y Main Ass y Error symptom Content Copyright 2015 LG Electronics Inc All rights reserved Only for trainin...

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