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LG OLED48C1PT Series Service Manual
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LG OLED48C1PT Series Service Manual

Chassis eb11c / ed11c
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OLED TV
SERVICE MANUAL
CHASSIS : EB11C / ED11C
MODEL : OLED48C1*L*
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL71796402 (2102-REV01)
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 © 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.
OLED48C1PVB / PT*

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Summary of Contents for LG OLED48C1PT 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 ................10 BLOCK DIAGRAM ................. 12 EXPLODED VIEW .................. 13 ASSEMBLY / DISASSEMBLY GUIDE ............ 14 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

    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 - 6 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 7 1920*1080 33.75 60.00 74.25 HDTV 1080I 1920*1080 56.25 50.00 148.50 HDTV 1080P 1920*1080 67.43 59.94 148.50 HDTV 1080P 1920*1080 67.50 60.00 148.50 HDTV 1080P - 7 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 8 UHD DEEP COLOUR ON When HDMI1,2,3 4096*2160 134.86 59.94 593.407 UDTV 2160P UHD DEEP COLOUR ON When HDMI1,2,3 4096*2160 135.00 60.00 UDTV 2160P UHD DEEP COLOUR ON - 8 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 9 297.00 UDTV 2160P 3840*2160 56.25 25.00 297.00 UDTV 2160P 3840*2160 67.5 30.00 297.00 UDTV 2160P 4096*2160 53.95 23.97 296.703 UDTV 2160P 4096*2160 UDTV 2160P - 9 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 10: 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 - 10 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 11 “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 - 11 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 12: Block Diagram

    BLOCK DIAGRAM - 12 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 13: 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. - 13 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 14 ASSEMBLY / DISASSEMBLY GUIDE 1. DISASSEMBLY (1) Dis-Assemble STAND COVER. Latch : 2 EA Check the LATCH Position. (2) Unfix SCREW and DisAssemble the STAND. - 14 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 15 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 - 15 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 16 (6) Unfix the TAPE from the harness. Description Specification TAPE,POLYESTER POLYESTER 100% FR(FIRE RESISTA ① (7) Unfasten the HARNESS. - 16 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 17 (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 - 17 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 18 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 - 18 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 19 (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 - 19 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 20 * Caution while handling the LCD module. (damage, removing the harness, hands print, dirt) Do not remove module front protection film GUIDE Line Description Specification OLED,MODULE-AM LE480AQD-ENA2 47INCH 3840X2160 ① CUTTING POLYESTER SPONGE 35*15 GASKET ② - 20 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 21 ⓐ→ⓑ ⓐ Description Specification SUPPORTER,VESA PRESS EGI 1.6 SUPPORTER EGI 32 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: 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 - 22 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 23 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 - 23 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 24 * 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 - 24 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 25 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 - 25 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 26 OLED48CX . 48\” CX COVER ASSEM ① BRH + 3M 5.5M SWCH10A FZB N - SCREW,MACHINE ② Assemble from the Bottom Of the Rear Cover - 26 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 27 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 - 27 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 28 (17) Assemble the STAND and Fix the SCREW. (18) Assemble STAND COVER with Latch. Latch : 2 EA Check the LATCH Position - 28 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 29: Troubleshooting Guide

    TROUBLE SHOOTING GUIDE Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 30 E. Noise Circuit noise, mechanical noise F. Exterior error Exterior defect First of all, Check whether there is SVC Bulletin in GSCS System for these model. Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 31 ☞A4 & A2 Always check & record S/W Version and White Replace Main Board Re-enter White Balance value Balance value before replacing the Main Board Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 32 ☞A18 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 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 33 1. Reconnection 2. Install Booster S/W Upgrade Contact with signal distributor Normal or broadcaster (Cable or Air) Picture? Normal Picture? Replace Main B/D Close Close Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 34 Replace Main/T-con B/D error cable normal Request repair for external device/cable Check external External HDMI device and Replace Main/T-con B/D device/Cable error cable normal Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 35 Replace (Check normal operation of screen? HDMI/ Screen Main /T-con External Input, Component, normal? RGB and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc. Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 36: Power Error

    Measure voltage of each output of Power B/D Normal? Normal Replace Main B/D voltage? Normal Close Check Main ST-BY 3.5V voltage? ☞A18 Replace Power B/D Replace Power B/D Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 37 Normal Replace Main B/D Check Power B/D voltage? voltage ※ Caution Check and fix exterior Replace Power B/D of Power B/D Part Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 38 Reboot by SW down load function UNKNOWN No meaning (same as initial value) COMP_END OLED threshold voltage degradation(Compensation) completes. PNWASHDONE Power off by panel noise wash function complited. (OLED) Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 39 Screen normal of Power Board voltage Speaker off Cancel OFF Replace Power Board and repair parts Check Speaker Replace MAIN Board Disconnection disconnection Replace Speaker Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 40 (In case of Connect and check Normal External Input other external audio? signal error) device Check and fix external device Check and fix external device Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 41: Function Error

    Replace Main B/D (Power B/D don’t have problem) If R/C operate, Normal Close operating? Explain the customer cause is interference from light in room. Replace R/C Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 42 5sec RF Receiver Close ver is “00.00”? Replace MR21 Close Replace MR21 * If you conduct the loop at 3times, change the MR21. Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 43 Voltage? 1pin Main B/D INSTART menu ☞A24 Close Check & Repair Wifi cable connection ☞A4 Wi-Fi Mac value Close is “NG”? Change the Wifi assy Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 44 Recognition error - S/W Version HDMI/ Check and fix DVI, Optical Replace Main B/D Fix in Recognition external device/cable accordance error with technical information Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 45 “Part related to nose” in the Owner’s then proceed as shown in the solution manual Manual. (For models without any fix information, provide the description) Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 46 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 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 47 Exchange Module (1) ~ (3) A-6/11 ~ A-8/11 Inverter/ Module Exchange T-Con (1) ~ (2) A-9/11 ~ A-10/11 Exchange Power Board(PSU) A-11/11 Continue to the next page Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 48 Remote control operation checking method D. Function error Motion Remote operation checking method How to use the Service remote control A15-A17 E. Etc Check items after Main B/D replacement Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 49 Check the voltage of R7632 (blue) while turning on TV power If the voltage is low, Vx1 is locked.(OK) Low (0V) : Normal, High (3.3V) : Burnt Detect Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 50 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 51  All settings  Programmes Programme Tuning & settings  Manual Tuning When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 52 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 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 53 1. Check the signal strength or check whether the screen is normal when the external device is connected. 2. After measuring each voltage from power supply, finally replace the MAIN BOARD. Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 54 Revised Content connection diagram date As the part connecting to the external input, check the screen condition by signal Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 55 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. Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 56 Screen darkness to disconnection of the FFC cable pin. G color transient due to poor FFC cable CABLE G Color Excessive connection A - 1/11 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 57 LVDS cable connection problem CABLE Color spread LVDS cable connection problem Due to foreign substance withi nLVDS CABLE Screen stop cable PIN A - 2/11 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 58 Main IC problem Main Dark picture Dark left-side screen Top/bottom screen part Main Broken picture Picture problem due to tuner Inner side quality problem A - 3/11 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 59 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 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 60 Screen picture spread problem Screen problem No problem at the initial stage. Right-side Main During Heat run, right-side picture picture problem problem A - 5/11 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 61 BLU internal foreign matter inflow MODULE Internal matter 6 block image broken MODULE Image broken MODULE Image broken Screen sync signal broken A - 6/11 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 62 BLU Vertical spreading on cube screen in no MODULE Vertical smear signal MODULE Over color Screen contour part brightly Over color A - 7/11 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 63 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 A - 8/11 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 64 T-Con is defective and the picture below T-CON image broken the screen is broken A - 9/11 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 65 The entire screen is dark and bit noise T-CON Image Broken occurs The entire screen is dark and bit noise T-CON Image Broken occurs A - 10/11 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 66 Appendix : Exchange Power Board (PSU) No Light No picture/Sound Ok A - 11/11 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 67 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 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 68 - SET St-by : 0V 6. T-CON 12V Check : P252 - SET On : above 12V - SET St-by : 0V All condition meets, Power Board OK. Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 69 POWER OFF MODE checking method date Entry method 1. Press the IN-START button of the remote control for adjustment. 2. Check the entry into adjustment item 3. Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 70: Checking Method

    1. Press the Setting button on the remote control. 2. Select the Sound function of the Menu. 3. Select the Sound Out. 4. Select TV Speaker. Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 71 3. Connect the tester 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. Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 72 2. Check the Main standby 3.5V on the terminal (③). 3. AS checking the Pre-Amp(IR LED light) , the power is in ON condition, an Analog Tester needle should move slowly, otherwise, it’s defective. Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 73 Checking order to check motion remote/wifi KEY1 Checking order 1. Check BT/Wifi cable condition between BT/Wifi assy & Main board. 2. Check the Main 3.5V on the terminal 1 pin. Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 74 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 Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 75 Digital EYE function ON/OFF For some Model, access to the Test Pattern TILT Used for screen tilting change (Access to the old PDP control mode) Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 76: Time Shift

    Connects to external input 1,2,3 COMP1,2 (Added function) Connects to Component 1,2 HDMI1,2,3,4 Connects to HDMI 1,2,3,4 (Add function) DVI (Add function) Connects to DVI Copyright © 2021 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 77 - 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 reserved. Only for training and service purposes.

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