LG OLED48C1AUB Service Manual Download Page 1

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P/NO : MFL71819001 (2103-REV01)

CAUTION

BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

OLED TV

SERVICE MANUAL

Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),

publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you

have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual.

The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service

Manual.

CHASSIS : EA11C

MODEL: OLED48C1PUB

MODEL:

OLED48C1AUB

Summary of Contents for OLED48C1AUB

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

Page 2: ...ts reserved Only training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 SOFTWARE UPDATE 10 BLOCK DIAGRAM 12 EXPLODED VIEW 13 ASSEMBLY DISASSEMBLY GUIDE 14 TROUBLE SHOOTING GUIDE APPENDIX ...

Page 3: ... 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 an...

Page 4: ...arge 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 electrostatic ...

Page 5: ...ts 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 an...

Page 6: ...es prior to the adjustment 3 Test method 1 Performance LGE TV test method followed 2 Demanded other specification Safety UL CSA CE IEC specification EMC FCC ICES CE IEC specification 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 Di...

Page 7: ...rt for FHD 14 3840 2160 56 25 25 297 UDTV 2160P Not Support for FHD 15 3840 2160 61 43 29 97 296 7 UDTV 2160P Not Support for FHD 16 3840 2160 67 5 30 297 UDTV 2160P Not Support for FHD 17 3840 2160 112 5 50 594 UDTV 2160P Not Support for FHD 18 3840 2160 134 86 59 94 593 4 UDTV 2160P Not Support for FHD 19 3840 2160 135 60 594 UDTV 2160P Not Support for FHD 20 4096 2160 53 95 23 98 296 7 UDTV 216...

Page 8: ...HD 21 1920 1080 135 120 297 UDTV 2160P Not Support for FHD 22 3840 2160 53 95 23 98 296 7 UDTV 2160P Not Support for FHD 23 3840 2160 54 24 297 UDTV 2160P Not Support for FHD 24 3840 2160 56 25 25 297 UDTV 2160P Not Support for FHD 25 3840 2160 61 43 29 97 296 7 UDTV 2160P Not Support for FHD 26 3840 2160 67 5 30 297 UDTV 2160P Not Support for FHD 27 3840 2160 112 5 50 594 UDTV 2160P Not Support f...

Page 9: ...model 42 4096 2160 269 73 119 88 1186 8 UDTV 2160P 43 4096 2160 270 120 1188 UDTV 2160P 44 7680 4320 107 89 23 98 1188 8K 8K Model Only 45 7680 4320 108 24 1188 8K 8K Model Only 46 7680 4320 110 25 1188 8K 8K Model Only 47 7680 4320 131 87 29 97 1188 8K 8K Model Only 48 7680 4320 132 30 1188 8K 8K Model Only 49 7680 4320 220 50 2376 8K 8K Model Only 50 7680 4320 263 74 59 94 2376 8K 8K Model Only ...

Page 10: ...ting SW update 6 After finishing the update it will show a pop up below the picture 7 Click Yes Tv will be turn off and on itself 2 NSU DOWNLOAD This Function is needed to connect to the internet Case 1 Auto Update On 1 Go to Menu All Settings Support Software Update then check Auto update is turned on 2 After the update complete the user can check a pop up below the picture which indicated update...

Page 11: ...oggle Item 1 Go to Menu All Settings Support Software Update 2 If it found upper version SW than the TV SW version TV would show a pop up like below the picture The latest version of the SW is available for your TV Do you want to update now 3 Yes update starts No Close the pop up check out later 4 If the user started the update the TV shows a pop up below the picture 5 CHECK NOW Just start the upd...

Page 12: ...ne Vx1 Vx1 IF_S IF NVRAM 256Kb I2C_4 I2C3 IQ IP HDMI4 TS IR Key 0 8V Core 3 3V Normal 3 5V ST_BY 5V Normal 0 8V 3 3V 5V 3 5V_ST 0 8V 1 8V 3 3V 3 3V 5V 1 8V 1 1V 3 5V_ST 3 5V_ST 3 3V 3 5V_ST 3 5V_ST 13V 3 5V 13V 13V 13V 3 3V To Panel From Power B D 13V Signal Path Power supply Power of In output To WIFI BT Combo eMMC CLK DATA STRB USB3 2 0 IR Blaster Vx1 41P 8 lane LPDDR4 16Gb 1 1V DDR 1 1V 13V 3 5...

Page 13: ...rts 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 200 400 540 800 200T 810 530 HR1 HR2 HP1 HW1 121 HS1 AR2 A10 700 900 920 120 500 501 570 LV1 LV2 Stand ...

Page 14: ...ronics Inc All rights reserved Only training and service purposes ASSEMBLY DISASSEMBLY GUIDE 1 DISASSEMBLY 1 Dis Assemble STAND COVER 2 Unfix SCREW and DisAssemble the STAND 1 1 1 1 Latch 2 EA 1 1 1 Check the LATCH Position ...

Page 15: ...VER from the MODULE Put hand on the marked area O Separate the back cover to the top DisAssemble the WAFER 2 CHASSIS ASSEMBLY SUB SCREW MACHINE BRH 3M 5 5M SWCH10A FZB N SUB EDX1C 48 55 65CX 55 65BX No Description Qty 1 1 Specification DisAssemble the SCRW and BRACKET 2 2 2 2 Check the LATCH Position 1 COVER ASSEMBLY REAR SCREW MACHINE BRH 3M 5 5M SWCH10A FZB N OLED48CX 48 CX COVER ASSEM No Descri...

Page 16: ...G Electronics Inc All rights reserved Only training and service purposes 6 Unfix the TAPE from the harness 7 Unfasten the HARNESS 1 1 TAPE POLYESTER POLYESTER 100 FR FIRE RESISTA No Description Qty 4 Specification 1 1 ...

Page 17: ...ODULE 9 Disassemble SPEAKER L R Release 1 2 Release BRACKET ASSEMBLY SUB SCREW MACHINE BRH 3MM 5 5MM SWCH18A FZMW N BRACKET OLED48CX IR ASSY IR No Description Qty 1 1 Specification IR ASSY WIFI ASSY RH LH 1 2 SPEAKER ASSEMBLY SPEAKER ASSEMBLY K0600711 65 55 CX BX LEFT 20W K0600712 65 55 CX BX RIGHT 20W No Description Qty 1 1 Specification ...

Page 18: ...er DisAssemble the screw ⓐ ⓑ SUPPORTER VESA SCREW MACHINE BRH 3MM 5 5MM SWCH18A FZMW N PRESS EGI 1 6 SUPPORTER EGI 32 No Description Qty 4 4 Specification 3 3 1 3 3 3 3 3 3 3 3 A B 3 5 2 3 ⓑ ⓐ 4 CHASSIS ASSEMBLY POWER SUPPLY ASSEMBLY SCREW MACHINE HARNESS SINGLE HARNESS SINGLE FREE LGP48CX 20OP LCD YY BRH 3MM 5 5MM SWCH18A FZMW N 20022HS 14B2 TO 20022HS 14B2_1 20022HS 15B2 TO 20022HS 15B2 L MAIN E...

Page 19: ...Inc All rights reserved Only training and service purposes 14 Unfix and Disassemble the SUPPORTER STAND 1 3 3 3 3 PLATE SCREW MACHINE BRH 3MM 5 5MM SWCH18A FZMW N PRESS HGI 1 6T SUPPORTER HGI E No Description Qty 1 4 Specification ...

Page 20: ...ODULE protective film Self Successive Check 1 Visual Check Check the damage and dirt on the MODULE Key Control Point Taking the outside when handling the LCD module Caution while handling the LCD module damage removing the harness hands print dirt OLED MODULE AM LE480AQD ENA2 47INCH 3840X2160 No Description Qty 1 Specification Do not remove module front protection film 1 ...

Page 21: ...e Check 1 Visual Check Check the SUPPORTER fix condition 2 2 2 2 1 1 1 1 Assemble the screw after insert ⓐ ⓑ ⓐ ⓑ 1 3 3 3 Check the sponge on Supporter Stand Guide when assembly B8 C8 B9 C9 ET96 CX9 BX9 3 PLATE SCREW MACHINE BRH 3MM 5 5MM SWCH18A FZMW N PRESS HGI 1 6T SUPPORTER HGI E No Description Qty 1 4 Specification SUPPORTER VESA SCREW MACHINE BRH 3MM 5 5MM SWCH18A FZMW N PRESS EGI 1 6 SUPPORT...

Page 22: ...nt When assemble the PCB and Fix with the screw be careful not to damage at PCB Insert Harness into the WAFER until Connect sound is occurred 3 3 1 3 3 3 3 3 3 3 3 A B 3 5 2 3 ⓑ ⓐ 4 CHASSIS ASSEMBLY POWER SUPPLY ASSEMBLY SCREW MACHINE HARNESS SINGLE HARNESS SINGLE FREE LGP48CX 20OP LCD YY BRH 3MM 5 5MM SWCH18A FZMW N 20022HS 14B2 TO 20022HS 14B2_1 20022HS 15B2 TO 20022HS 15B2 L MAIN EDX1C OLED48CX...

Page 23: ...with the screw be careful not to damage at PCB 3 3 1 3 3 3 3 3 3 3 3 A B 3 5 2 3 ⓑ ⓐ 4 CHASSIS ASSEMBLY POWER SUPPLY ASSEMBLY SCREW MACHINE HARNESS SINGLE HARNESS SINGLE FREE LGP48CX 20OP LCD YY BRH 3MM 5 5MM SWCH18A FZMW N 20022HS 14B2 TO 20022HS 14B2_1 20022HS 15B2 TO 20022HS 15B2 L MAIN EDX1C OLED48CX6LA MAIN EB No Description Qty 1 1 12 1 1 Specification Insert Insert Harness into the STOPPER ...

Page 24: ...IN PCB P7602 MODULE A 2 MAIN PCB P7601 MODULE B 3 MAIN PCB P7603 POWER P201 4 IR WIFI ASSY MAIN PCB P4000 5 MAIN PCB P5901 SPEAKER C SPEAKER D Key Control Point Insert Harness into the WAFER until Connect sound is occurred Be careful a particle in FFC Pin A B P7603 P7601 P201 P4000 P5901 C D IR ASSY WIFI ASSY P7602 ...

Page 25: ...he tape for fixing Harness at Module Rub the tape 2 3 times for adhering totally Arrange the harness lead as shown in the figure Don t hang IR FFC CABLE Don t hang on the latch Be careful not positioned on the PCB Insert the speaker harness 1 1 1 1 TAPE POLYESTER POLYESTER 100 FR FIRE RESISTA No Description Qty 4 Specification ...

Page 26: ...are dropped screw foreign material in system before the REAR COVER 3 Visual Check Check that Harness is Connected closely Assemble from the Bottom Of the Rear Cover 2 2 2 2 Check the gap Module to B C after assembly Push the LATCH 1 Check Assembly Condition If There is uneven step It is supposed to be Assembly error check Latch again Side AV Bracket and B C after assembly COVER ASSEMBLY REAR SCREW...

Page 27: ...ER s Appearance Status whether there is a contraction a Whitening or a Scratch etc 2 Visual Check Check that there are dropped screw foreign material in system before the REAR COVER 3 Visual Check Check that Harness is Connected closely Check the direction Insert to the POWER PCB Attention the cable isn t located between pem nut and bracket 1 2 CHASSIS ASSEMBLY SUB SCREW MACHINE BRH 3M 5 5M SWCH10...

Page 28: ...opyright LG Electronics Inc All rights reserved Only training and service purposes 17 Assemble the STAND and Fix the SCREW 18 Assemble STAND COVER with Latch 1 1 1 1 Latch 2 EA 1 1 1 Check the LATCH Position ...

Page 30: ...uto on off 7 8 Off when on off while viewing power auto on off 8 9 C Audio error No audio Normal video 9 10 Wrecked audio discontinuation noise 10 11 D Function error Remote control Local switch checking 11 12 MR21 operating checking 12 13 Wifi operating checking 13 14 External device recognition error 14 15 E Noise Circuit noise mechanical noise 15 16 F Exterior error Exterior defect 16 First of ...

Page 31: ...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 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 Speak...

Page 32: ...io Check and replace MAIN B D Y Replace Power Board and repair parts N End Standard Repair Process A Video error No video No audio A18 Established date Revised date Error symptom 2 Copyright 2021 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 33: ...ain B D 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 Established date Revised date Er...

Page 34: ...or Check external device and cable Y External device Cable normal HDMI error Check external device and cable Replace Main T con B D Replace Main T con B D N N A Video error Color error A6 N Y End Replace module Request repair for external device cable Color error Check Test pattern A8 A7 Standard Repair Process Established date Revised date Error symptom 4 Copyright 2021 LG Electronics Inc All rig...

Page 35: ... by connecting Jig pattern Generator Set top Box etc N Y Replace Main T con B D Screen normal Check screen condition by input External Input Component HDMI DVI Request repair for external device Component error HDMI DVI Connect other external device and cable Check normal operation of External Input Component RGB and HDMI DVI by connecting Jig pattern Generator Set top Box etc Replace Main T con B...

Page 36: ...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 Main ST BY 3 5V Replace Power B D N Y Normal voltage Replace Power B D Y A17 A18 A18 A18 Standard Repair Process Established date Revised date Error symptom 6 Stand By Red or Turn On Operating Turn Off Close Copyright 2021 LG Electronics Inc All rights reserved Only for training and servic...

Page 37: ...place Main B D CPU Abnormal If Power Off mode is not displayed Check Power B D voltage Y N Replace Main B D Normal voltage Replace Power B D Replace Power B D N Y Normal End Caution Check and fix exterior of Power B D Part A19 A18 Established date Revised date Error symptom Standard Repair Process 7 Abnormal 1 Copyright 2021 LG Electronics Inc All rights reserved Only for training and service purp...

Page 38: ...Check fail after multi power on Check Change Power B D CPUABNORMAL If the CPU attempts to reset in case of abnormal operation and Shut Down in case of failure Check Change Main B D NO POLING Power off when receiving no ack RESULT TV power off on Reboot CONDITION There is no I2C response from CPU for 15 seconds Check Change Main B D CPUCMD Power off by main SoC command Check Change Main B D INV_ERR...

Page 39: ...ce Power Board and repair parts Check Speaker disconnection N Y Replace Speaker Replace MAIN Board End C Audio error No audio Normal video A20 A21 A18 Disconnection Established date Revised date Error symptom Standard Repair Process 9 Copyright 2021 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 40: ...xternal Input Connect and check other external device N Y Normal audio Check and fix external device Replace Power B D N Y Normal voltage Check input signal RF External Input signal Signal normal When RF signal is not received Request repair to external cable ANT provider Y Check audio B Voltage 20V Replace Main B D In case of External Input signal error Check and fix external device Replace Main ...

Page 41: ...m Check Replace Baterry of R C Check Repair Cable connection Connector solder Normal operating Check B 3 5V On Main B D A22 Normal Voltage N N Check 7 8v on Power B D Replace Power B D or Replace Main B D Power B D don t have problem A18 Check IR Output signal Normal Signal N Y Repair Replace IR B D N A22 Replace Main B D Y A22 Standard Repair Process Established date Revised date Error symptom 11...

Page 42: ...ir Process Established date Revised date Error symptom Replace MR21 Turn off on the set and press the wheel Press the back key about 5sec If you conduct the loop at 3times change the MR21 Y Check the INSTART menu RF Receiver Ver is 00 00 Y Check Repair RF assy connection N Replace MR21 Y RF Receiver ver is 00 00 N A23 A4 A4 12 Close Close Normal operating Close Copyright 2021 LG Electronics Inc Al...

Page 43: ...r Wifi cable connection N Check the Wifi wafer 1pin Standard Repair Process Established date Revised date Error symptom 13 Change the Wifi assy Normal Voltage Close Y Y N Replace Main B D Wi Fi Mac value is NG N Close A24 A4 A4 A24 Copyright 2021 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 44: ... Check and fix external device cable HDMI DVI Optical Recognition error Replace Main B D Replace Main B D Fix in accordance with technical information D Function error External device recognition error Established date Revised date Error symptom Standard Repair Process 14 Copyright 2021 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 45: ...ceed as shown in the solution manual For models without any fix information provide the description Mechanical noise is a natural phenomenon and apply the 1st level description When the customer does not agree apply the process by stage Describe the basis of the description in Part related to nose in the Owner s Manual E Noise Circuit noise mechanical noise Established date Revised date Error symp...

Page 46: ...lace cabinet Replace remote control Remote control damage Stand dent Replace stand F Exterior defect Exterior defect Established date Revised date Error symptom Standard Repair Process 16 Copyright 2021 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 47: ...5 A Video error _Vertical Horizontal bar residual image light spot Connection diagram A6 6 A Video error_ Color error Check Link Cable Vx1 EPI reconnection condition A7 7 Appendix Defected Type caused by T Con Inverter Module Check Cable 1 2 A 1 11 A 2 11 Exchange Main Board 1 3 A 3 11 A 5 11 Exchange Module 1 3 A 6 11 A 8 11 Exchange T Con 1 2 A 9 11 A 10 11 Exchange Power Board PSU A 11 11 Conti...

Page 48: ...Audio error_ No audio Normal video Checking method in menu when there is no audio A11 12 Voltage and speaker checking method when there is no audio A12 13 D Function error Remote control operation checking method A13 14 Motion Remote operation checking method A14 15 E Etc How to use the Service remote control A15 A17 16 Check items after Main B D replacement A18 Continued from previous page Copyri...

Page 49: ...r_No video Normal audio A2 Entry method 1 Press the ADJ button on the remote control for adjustment 2 Enter into White Balance 3 After recording the R G B GAIN Cut value of Color Temp Cool Medium Warm re enter the value after replacing the MAIN BOARD Copyright 2021 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 50: ...enuator 10dB 15dB 20dB etc Standard Repair Process Detail Technical Manual TUNER input signal strength checking method A Video error_Video error video lag stop A3 Established date Revised date Error symptom Content A3 Copyright 2021 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 51: ...o error video lag stop 1 Checking method for remote control for adjustment Press the IN START with the remote control for adjustment Version A4 Established date Revised date Error symptom Content A4 Copyright 2021 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 52: ...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 48_55_65_77C1 83C1 Copyright 2021 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 53: ...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 48_55_65_77C1 83C1 Copyright 2021 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 54: ...connection condition A Video error_Color error Check the contact condition of the Link Cable especially dust or mis insertion A7 Established date Revised date Error symptom Content A7 Copyright 2021 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 55: ...n of FFC cable CABLE R Color Excessive Color is Excessive due to FFC Cable Contact CABLE Screen darkness screen is dark due to poor contact due to disconnection of the FFC cable pin CABLE G Color Excessive G color transient due to poor FFC cable connection Copyright 2021 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 2021 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 2021 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 2021 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 2021 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 2021 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 2021 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 2021 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 2021 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 2021 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 66: ...ck front Power Indicator B Power error _No power A8 Established date Revised date Error symptom Content A8 ST BY condition On or Off Power ON condition Turn Off Copyright 2021 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 67: ...by 7 8V swing between 7V to 10V 4 DRV_ON Check P201 SET On above 2 5V SET St by 0V 5 T CON 22V Check P251 SET On above 22V SET St by 0V 6 T CON 12V Check P252 SET On above 12V SET St by 0V SET Model Power P N Name OLED48C1 EAY65768824 LGP48CX 20OP OLED55C1 EAY65689424 LGP55CX 20OP OLED65C1 EAY65689423 LGP65CX 20OP OLED77C1 EAY65689422 LGP77CX 20OP Power Board Voltage Current All condition meets Po...

Page 68: ...to adjustment item 3 Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing A10 Established date Revised date Error symptom Content A10 Copyright 2021 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 A11 Established date Revised date Error symptom Content A11 Copyright 2021 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 70: ...ester P5400 to the speaker terminal and if you hear the Chik Chik sound when you touch the GND and output terminal the speaker is normal Standard Repair Process Detail Technical Manual Voltage and speaker checking method when there is no audio C Audio error_No audio Normal video A12 Established date Revised date Error symptom Content A12 83C1 Copyright 2021 LG Electronics Inc All rights reserved O...

Page 71: ...ion checking method D Function error A13 Established date Revised date Error symptom Content A13 Checking order to check remote control IR EYE Sensor IR Eye LED Pin Pin name 1 3 5V_WIFI 2 WIFI_DM 3 WIFI_DP 4 GND 5 WOL WIFI_PWR_ON 6 3 5V_WIFI 7 RESET 8 GND 9 BT_WAKE_UP_DEVICE 10 BT_WAKE_UP_HOST 11 GND 12 No Connection 13 No Connection 14 No Connection 15 No Connection 16 EYE_SDA 17 EYE_SCL 18 GND 1...

Page 72: ...he terminal 1 pin Checking order to check motion remote wifi Wifi BT Front Wifi BT Rear A14 Pin Pin name 1 3 5V_WIFI 2 WIFI_DM 3 WIFI_DP 4 GND 5 WOL WIFI_PWR_ON 6 3 5V_WIFI 7 RESET 8 GND 9 BT_WAKE_UP_DEVICE 10 BT_WAKE_UP_HOST 11 GND 12 3 5V_WIFI 13 No Connection 14 No Connection 15 No Connection 16 EYE_SDA 17 EYE_SCL 18 GND 19 IR 20 LED_R 21 GND 22 3 5V 23 KEY2 24 KEY1 25 GND Copyright 2021 LG Ele...

Page 73: ... How to use the Service remote control E Etc A15 Established date Revised date Error symptom Content A15 0 4 1 3 0 4 1 3 1 How to access the remote control Copyright 2021 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 74: ...a Zoom Aucto Screen 4 3 16 9 PSM Changes in the order of Bright Picture Easy Picture Cinema Spots Game Custom PIcture1 Custom Picture2 Bright Picture SSM Added Function Standard user music cinema sports game standard user PIP Picture In Picture is activated TEXT Access to the Power Only mode CAP Broadcasting caption on off MPX Stereo mode mono stereo foreign language access Used when in factory mo...

Page 75: ... 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 external i...

Page 76: ... 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 2021 LG Electronics Inc All rights reserve...

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