LG OLED48C2 Series Service Manual
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LG OLED48C2 Series Service Manual

LG OLED48C2 Series Service Manual

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OLED TV
SERVICE MANUAL
CHASSIS : E*21D
MODEL: OLED48C2***
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL71892901 (2201-REV00)
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.
Copyright © 2022 LG Electronics Inc. All rights reserved. Only training and service purposes.

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Summary of Contents for LG OLED48C2 Series

  • Page 1 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.
  • Page 2 SPECIFICATION ..................6 SOFTWARE UPDATE ................12 BLOCK DIAGRAM ................. 14 EXPLODED VIEW .................. 15 ASSEMBLY / DISASSEMBLY GUIDE ............ 16 TROUBLE SHOOTING GUIDE ..........APPENDIX - 2 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 3: Safety Precautions

    When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver is returned to the customer. - 3 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 4: Servicing Precautions

    - 4 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 5 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. - 5 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 6: Application Range

    - Digital TV : DTMB (China/Hongkong), DVB-C (China) - Analogue TV : PAL D/K,I, NTSC-M (China/ Hongkong) 4) Philliphine - Digital TV : ISDB-T - Analogue TV : NTSC-M - 6 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 7 * Hong Kong - 3780, 0.4/0.6, 4/16/64QAM, PN945, 720 ► DVB-C - Symbolrate : 4.0Msymbols/s to 7.2Msymbols/s - Modulation : 16QAM, 64-QAM, 128-QAM and 256-QAM - 7 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 8 000~999 *BS8K is only for 8K Models. CS Digital 000~999 (4K Models do not support BS8K Digital Channels.) BS4K/8K Digital 001~499 CS4K Digital 500~999 - 8 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 9 *Only 42/48C2 model & Japan all model USB Input (3EA) EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD Ethernet Connect (1EA) Ethernet Connect - 9 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 10: Dtv Mode

    107.89 23.98 1188 7680*4320 1188 7680*4320 1188 7680*4320 131.87 29.97 1188 8K Model Only. 7680*4320 1188 7680*4320 2376 7680*4320 263.74 59.94 2376 7680*4320 2376 - 10 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 11 UHD DeepColor is On (UHD, 8K 120Hz models only), 2560*1440 182.99 119.99 497.7 Support only when UHD Deep- Color is On - 11 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 12: Usb Download

    (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 - 12 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 13 “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 - 13 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 14: Block Diagram

    BLOCK DIAGRAM - 14 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 15: 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. - 15 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 16 ASSEMBLY / DISASSEMBLY GUIDE 1. DISASSEMBLY (1) Dis-Assemble STAND COVER. Latch : 2 EA Check the LATCH Position. (2) Unfix SCREW and DisAssemble the STAND. - 16 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 17 Check the LATCH Position. Description Specification COVER ASSEMBLY,REAR OLED48CX . 48\” CX COVER ASSEM ① BRH + 3M 5.5M SWCH10A FZB N - SCREW,MACHINE ② - 17 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 18: Specification

    (6) Unfix the TAPE from the harness. Description Specification TAPE,POLYESTER POLYESTER 100% FR(FIRE RESISTA ① (7) Unfasten the HARNESS. - 18 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 19 (9) Disassemble SPEAKER L/R. Description Specification SPEAKER ASSEMBLY K0600712 65 55 CX BX RIGHT 20W ① SPEAKER ASSEMBLY K0600711 65 55 CX BX LEFT 20W ② - 19 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 20 After DisAssemble the screw ⓐ Description Specification SUPPORTER,VESA PRESS EGI 1.6 SUPPORTER EGI 32 ① BRH + 3MM 5.5MM SWCH18A FZMW N SCREW,MACHINE ② - 20 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 21 (14) Unfix and Disassemble the SUPPORTER, STAND. Description Specification PLATE PRESS HGI 1.6T SUPPORTER HGI E ① BRH + 3MM 5.5MM SWCH18A FZMW N SCREW,MACHINE ② - 21 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 22 * Caution while handling the LCD module. (damage, removing the harness, hands print, dirt) (Do not remove module front protection film) Description Specification OLED,MODULE-AM LE480AQD-ENA2 47INCH 3840X2160 ① - 22 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 23 ⓐ→ⓑ ⓐ Description Specification SUPPORTER,VESA PRESS EGI 1.6 SUPPORTER EGI 32 ① BRH + 3MM 5.5MM SWCH18A FZMW N SCREW,MACHINE ② - 23 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 24: Chassis Assembly

    POWER SUPPLY ASSEMBLY ② SCREW,MACHINE BRH + 3MM 5.5MM SWCH18A FZMW N ③ 20022HS-14B2 TO 20022HS-14B2_1 ④ HARNESS,SINGLE HARNESS,SINGLE 20022HS 15B2 TO 20022HS 15B2 L ⑤ - 24 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 25 Connect sound is occurred Insert Insert Description Specification BRACKET ASSEMBLY,SUB BRACKET OLED48CX - IR ASSY(IR ① BRH + 3MM 5.5MM SWCH18A FZMW N SCREW,MACHINE ② - 25 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 26 * Insert Harness into the WAFER until Connect sound is occurred. * Be careful a particle in FFC Pin. P7603 P201 P7602 “A” P7601 “B” P5901 P4000 “C” “D” WIFI ASSY IR ASSY - 26 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 27 Arrange the harness lead as shown in the figure. Be careful not positioned on the PCB. Description Specification TAPE,POLYESTER POLYESTER 100% FR(FIRE RESISTA ① - 27 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 28 OLED48CX . 48\” CX COVER ASSEM ① BRH + 3M 5.5M SWCH10A FZB N - SCREW,MACHINE ② Assemble from the Bottom Of the Rear Cover - 28 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 29 Attention the cable isn’t located between pem-nut and bracket Description Specification CHASSIS ASSEMBLY,SUB SUB EDX1C 48/55/65CX, 55/65BX ① BRH + 3M 5.5M SWCH10A FZB N - SCREW,MACHINE ② - 29 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 30 (17) Assemble the STAND and Fix the SCREW. (18) Assemble STAND COVER with Latch. Latch : 2 EA Check the LATCH Position - 30 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 31: Troubleshooting Guide

    TROUBLE SHOOTING GUIDE...
  • Page 32 Contents of Standard Repair Process Error symptom (High category) Error symptom (Mid category) Page Remarks No video/Normal audio No video/No audio Picture broken/ Freezing A. Video error Color error Vertical/Horizontal bar, residual image, light spot, external device color error No power Off when on, off while viewing, power auto B.
  • Page 33 Standard Repair Process Established A. Video error Error date symptom No video/ Normal audio Revised date 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, Speaker Cable, IR B/D Cable,,,) ☞A1 ☞A9 No video...
  • Page 34 Standard Repair Process Established A. Video error Error date symptom No video/ No audio Revised date ☞A9 Check various Check and No Video/ Normal voltages of Power replace No audio voltage? Board (12V…) MAIN B/D Replace Power Board and repair parts...
  • Page 35 Standard Repair Process Established A. Video error Error date symptom Picture broken/ Freezing Revised date . By using Digital signal level meter ☞ A3 . By using Diagnostics menu on OSD ( Advanced→ Channels→ Channel Tuning→ Manual Tuning → Check the Signal ) Check RF Signal level - Signal strength (Normal : over 50%) - Signal Quality (Normal: over 50%)
  • Page 36 Standard Repair Process Established A. Video error Error date symptom Color error Revised date ☞ A7 ※ Check and replace Link ☞A6 Cable Color Color Color (EPI or Vx1 Replace module Replace Main B/D error? error? error? Cable) and Check color by input contact -External Input condition...
  • Page 37 Standard Repair Process Established A. Video error Error date symptom Vertical / Horizontal bar, residual image, Revised date light spot, external device color error Vertical/Horizontal bar, residual image, light spot Replace Module ☞A6 ☞ A7 Check Check color condition external Check and by input Screen...

  • Page 38: Power Error

    Standard Repair Process Established B. Power error Error date symptom No power Revised date ☞A8 ☞A9 DC Power on Check Power Normal Check Power Replace by pressing Power Key LED On? operation? On ‘”High” Power B/D On Remote control . Stand-By: Red or Turn On .
  • Page 39 Standard Repair Process Established B. Power error Error date symptom Off when on, off while viewing, power auto on/off Revised date Check outlet ☞A10 Check Power Off Check A/C cord Error? Replace Main B/D Normal? Mode Abnormal Check for all 2- phase Abnormal power out Replace Power B/D...
  • Page 40 Standard Repair Process Established B. Power error Error date symptom Off when on, off while viewing, power auto on/off Revised date * Please refer to the all cases which can be displayed on power off mode. Power Off list Explanation Action contents Power off when TV is not turned off during a certain time KEYTIMEOUT...
  • Page 41 Standard Repair Process Established C. Audio error Error date symptom No audio/ Normal video Revised date ☞A11 ☞A12+A9 Check user No audio Check audio 20V Normal menu > Screen normal of Power Board voltage Speaker off Cancel OFF Replace Power Board and repair parts Check Speaker Disconnection Replace MAIN Board...
  • Page 42 Standard Repair Process Established C. Audio error Error date symptom Wrecked audio/ discontinuation/noise Revised date → abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio ☞A12+A9 Wrecked audio/ Check and replace Discontinuation/ Check audio speaker and B+ Voltage (20V) Noise for connector all audio...
  • Page 43 Standard Repair Process Established D. Function error Error date symptom Remote control & Local switch checking Revised date 1. Remote control(R/C) operating error Replace Main B/D ☞A13 ☞A13 ☞A13 Check & Repair Check R/C itself Normal Normal Check B+3.5V Normal Check IR Normal Cable connection...
  • Page 44 Standard Repair Process Established D. Function error Error date symptom Magic remote operating checking Revised date 2. MR22(Magic Remote control) operating error ☞A4 Turn off/on the Check the RF Receiver Check MR22 Normal Press the Is show ok set and press Ver is “00.00”? operating? itself Operation...
  • Page 45 Standard Repair Process Established D. Function error Error date symptom Wifi operating checking Revised date 3.Wifi operating error ☞A14 ☞A4 Check the Wifi wafer Check the Normal Replace Wi-Fi Mac Voltage? value is “NG”? 1pin INSTART menu Main B/D ☞A14 Close Check &...
  • Page 46 Standard Repair Process Established D. Function error Error date symptom External device recognition error Revised date Check technical Check External Input information Signal Technical input Replace Main B/D and Component input? - Fix information information? Recognition error signal - S/W Version HDMI/ DVI, Optical Check and fix...
  • Page 47 Standard Repair Process Established E. Noise Error date symptom Circuit noise, mechanical noise Revised date Check location Identify Circuit Replace PSU of noise nose type noise Mechanical Check location of noise noise ※ When the nose is severe, replace the module ※...
  • Page 48 Standard Repair Process Established F. Exterior defect Error date symptom Exterior defect Revised date Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote control Replace remote control damage Stand Replace stand dent...
  • Page 49 Contents of Standard Repair Process Detail Technical Manual Error symptom Content Page Remarks Check Vx1 lock A. Video error_ No video/Normal audio Check White Balance value TUNER input signal strength checking method A. Video error_ video error /Video lag/stop Version checking method Tuner Checking Part A.
  • Page 50 Contents of Standard Repair Process Detail Technical Manual Continued from previous page Error symptom Content Page Remarks Check front display LED B. Power error_ No power Check power input Voltage & Main ST-BY 3.5V B. Power error_Off POWER OFF MODE checking method (when on/off, while viewing) Checking method in menu when there is no audio C.
  • Page 51 Standard Repair Process Detail Technical Manual Error Established error_No A. Video video/Normal audio symptom date Revised Content Check Vx1 lock date R7624: TV On -> Low(0V), Vx1 : OK R7632 ※ Reference: Burnt Detect Measurement Point Check a voltage of R7624 (Blue) after turn on Check the voltage of R7632 (Red) while turning on TV power...
  • Page 52 Standard Repair Process Detail Technical Manual Error Established error_No A. Video video/Normal audio symptom date Revised Content Check White Balance value date Entry method 1. Press the ADJ button on the remote control for adjustment. 2. Enter into White Balance. 3.
  • Page 53 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop symptom date Revised TUNER input signal strength checking method Content date All settings  General  Programmes  Programme Tuning & settings  Manual Tuning When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.)
  • Page 54 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop symptom date Revised Version checking method Content date 1. Checking method for remote control for adjustment Version Press the IN-START with the remote control for adjustment...
  • Page 55 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop symptom date Revised TUNER checking part Content date Checking method: 1. Check the signal strength or check whether the screen is normal when the external device is connected. 2.
  • Page 56 Standard Repair Process Detail Technical Manual Error A. Video error _Vertical/Horizontal bar, Established symptom residual image, light spot date Revised Content connection diagram date As the part connecting to the external input, check the screen condition by signal...
  • Page 57 Standard Repair Process Detail Technical Manual Error Established A. Video error_Color error symptom date Revised Content Check Link Cable(VX1/EPI) reconnection condition date Check the contact condition of the Link Cable, especially dust or mis insertion.
  • Page 58 Appendix. Examples of Symptoms(Image error) Check for poor cable contact Symptom Item Cause Symptom Image Name Poor broken pin of FFC cable CABLE Color smear Color is Excessive due to FFC Cable CABLE R Color Excessive Contact. screen is dark due to poor contact due CABLE Screen darkness to disconnection of the FFC cable pin.
  • Page 59 Appendix. Examples of Symptoms(Image error) Check for poor cable contact Symptom Item Cause Symptom Image Name CABLE Color spread LVDS cable connection problem CABLE Color spread LVDS cable connection problem CABLE Color spread LVDS cable connection problem Due to foreign substance withi nLVDS CABLE Screen stop cable PIN...
  • Page 60 Appendix. Examples of Symptoms(Main) Check parts by symptom Symptom Item Cause Symptom Image Name Main Screen noise Bit noise from horizontal screen Broken screen due to Main Screen noise Main IC problem Main Dark picture Dark left-side screen Top/bottom screen part Main Broken picture Picture problem due to tuner...
  • Page 61 Appendix. Examples of Symptoms(Main) Check parts by symptom Symptom Item Cause Symptom Image Name Main Broken screen Broken screen in a horizontal manner Main Screen spread Screen corner appears blurry Main Color Spread Color spread on the screen Main Blurry Screen Blurry picture on the screen A - 4/11...
  • Page 62 No problem at the initial stage, Main Broken picture G-color spread after 10 minutes Right-side Main Screen Right-side screen problem problem LG logo Main Screen picture spread problem Screen problem No problem at the initial stage. Right-side Main During Heat run, right-side picture picture problem...
  • Page 63 Appendix. Examples of Symptoms(Module) Check parts by symptom Symptom Item Cause Symptom Image Name Isometric Isometric horizontal bars occur MODULE Horizontal Bar throughout the screen BLU internal foreign matter inflow MODULE Internal matter 6 block image broken MODULE Image broken MODULE Image broken Screen sync signal broken...
  • Page 64 Appendix. Examples of Symptoms(Module) Check parts by symptom Symptom Item Cause Symptom Image Name Internal damage and image breakage MODULE Image broken due to external impact Bend on the Bending due to lateral external impact MODULE screen and internal bending of BLU Vertical spreading on cube screen in no MODULE Vertical smear...
  • Page 65 Appendix. Examples of Symptoms(Module) Check parts by symptom Symptom Item Cause Symptom Image Name MODULE Vertical bar Center Vertical Bar Center of the screen 1 block dark MODULE Screen darkness MODULE Vertical bar Center Vertical Bar Darkness at the MODULE bottom of the MODULE internal BLU breakage screen...
  • Page 66 Appendix. Examples of Symptoms(T-Con) Check parts by symptom Symptom Item Cause Symptom Image Name screen lower T-Con is defective and the picture below T-CON image broken the screen is broken screen lower T-Con is defective and the picture below T-CON image broken the screen is broken screen lower...
  • Page 67 Appendix. Examples of Symptoms(T-Con) Check parts by symptom Symptom Item Cause Symptom Image Name T-CON Wafer Locking The strength is T-CON Image Broken weak and cable contact failure occurs Darkness at the Initial normal operation, T-CON top of the screen upper darkness during heat run The entire screen is dark and bit noise T-CON...
  • Page 68 Appendix : Exchange Power Board (PSU) No Light No picture/Sound Ok A - 11/11...
  • Page 69 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power symptom date Revised Content Check front Power Indicator date ST-BY condition: On or Off Power ON condition: Turn Off...
  • Page 70 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power symptom date Revised Content Check power input voltage and ST-BY 7.8V date Power P/N, Name SET Model DC 12VM Line Check (ST- OLED48C2 EAY65768827, LGP48CX-20OP BY : 7.8V, Normal : 12V) Power Check Sequence 1.
  • Page 71 Standard Repair Process Detail Technical Manual Error Established B. Power error _Off when on, off whiling viewing symptom date Revised Content POWER OFF MODE checking method date Entry method 1. Press the IN-START button of the remote control for adjustment. 2.

  • Page 72: Checking Method

    Standard Repair Process Detail Technical Manual Error Established C. Audio error_No audio/Normal video symptom date Revised Content Checking method in menu when there is no audio date <ALL MODELS> Checking method 1. Press the Setting button on the remote control. 2.
  • Page 73 Standard Repair Process Detail Technical Manual Error Established C. Audio error_No audio/Normal video symptom date Revised Voltage and speaker checking method Content date when there is no audio P201 ② ① P252 P251 Checking order when there is no audio 1.
  • Page 74 Standard Repair Process Detail Technical Manual Error Established D. Function error symptom date Revised Content Remote control operation checking method date Pin name IR & EYE Sensor +3.5V_WIFI WIFI_DM WIFI_DP WOL/WIFI_PWR_ON +3.5V_WIFI WIFI_SUSPEND/RESUME ① COMBO_RESET BT_WAKE_UP_HOST ② +3.5V_WIFI EYE_SDA EYE_SCL ③...
  • Page 75 Standard Repair Process Detail Technical Manual Error Established D. Function error symptom date Revised Content Magic Remote/WiFi operation checking method date Pin name +3.5V_WIFI WIFI_DM WIFI_DP ① Wifi & BT Front WOL/WIFI_PWR_ON +3.5V_WIFI WIFI_SUSPEND/RESUME COMBO_RESET ③ BT_WAKE_UP_HOST Wifi & BT Rear +3.5V_WIFI EYE_SDA EYE_SCL...
  • Page 76 Standard Repair Process Detail Technical Manual Error Established E. Etc symptom date Revised Content How to use the Service remote control date 1. How to access the remote control...
  • Page 77 Standard Repair Process Detail Technical Manual Error Established E. Etc symptom date Revised Content How to use the Service remote control date 2. Remote control part definition POWER Power On/Off [ETC] Each time pressing the KEY button, Mode gets changed to ETC and P-ONLY each time ETC (Added Function) All KEY function [PIP PR-][PIP PR+][SWAP] [PIP INPUT][DVI] KEY Function...

  • Page 78: Time Shift

    Standard Repair Process Detail Technical Manual Error Established E. Etc symptom date Revised Content How to use the Service remote control date B-TOOTH Connected to Blue-Tooth (Added function) Model Nam ex) 42PG60D-NA Current Model Name S/W Version ex) V03.11.0 Current S/W version IN-START MICOM Version ex) V3.05.0 current Mi-Com version UTT ex) User TV total usage time POWER OFF STATUS ex) Shows power-off status...
  • Page 79 Standard Repair Process Detail Technical Manual Error Established E. Etc symptom date Revised Content Check items after Main B/D replacement date Check items afer Main B/D(Model Number D/L, White Balance) 1. Press the Service remote control instart Key. No.7 Select Model Number D/L - Key in the model name and serial number after checking the ID label on the back cover.

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