LG OLED48CXPTA Service Manual

Chassis ebx1c

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OLED TV

SERVICE MANUAL

CHASSIS : EBX1C

MODEL: OLED48CXPTA

CAUTION

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

P/NO : MFL71696247 (2004-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.

Table of Contents

Summary of Contents for LG OLED48CXPTA

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 ................11 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 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 Optical Audio out USB Input (3 EA) EMF, For SVC (download) Ethernet Connect STP cable (1EA) PCMCIA Card slot PCMCIA Slot only EU/CIS (1EA) - 7 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 8: Component Input
1920*1080 UDTV 2160P Not Support for FHD. 3840*2160 53.95 23.98 296.7 UDTV 2160P Not Support for FHD. 3840*2160 UDTV 2160P Not Support for FHD. - 8 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 9 107.89 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 - 9 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 10 241.5 only when 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 - 10 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 11: Usb Download
(6) Turn OFF the TV and On. Check the updated SW Version (8) After TV turned on, Check the updated SW Version and and Tool Option. Tool Option. - 11 - 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) Description Specification OLED,MODULE-AM LE480AQD-ENA2 47INCH 3840X2160 ① - 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 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 © 2020 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 © 2020 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 © 2020 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 © 2020 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 35 Replace (Check normal operation of HDMI/ Screen Main /T-con External Input, Component, normal? RGB and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc. Copyright © 2020 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 © 2020 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 © 2020 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 © 2020 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 © 2020 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 41 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 42 5sec RF Receiver ver Close is “00.00”? Replace MR20 Close Replace MR20 * If you conduct the loop at 3times, change the MR20. Copyright © 2020 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 © 2020 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 © 2020 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 © 2020 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 © 2020 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 © 2020 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 49 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 50  All settings  Programmes Programme Tuning & settings  Manual Tuning When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 51 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 52 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 53 Revised Content connection diagram date As the part connecting to the external input, check the screen condition by signal Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 54 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 55 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 56 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 57 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 58 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 59 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 60 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 61 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 62 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 64 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 66 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 67 - 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 68 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 69: 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 70 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 71 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 72 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 73 Standard Repair Process Detail Technical Manual Error Established D. Function error symptom date Revised Content How to use the Service remote control date 1. How to access the remote control Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 74 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 75: 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
Page 76 - 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

LG OLED48CXPTA Service Manual

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Summary of Contents for LG OLED48CXPTA

Page 3: Safety Precautions

Page 4: Servicing Precautions

Page 6: Application Range

Page 8: Component Input

Page 11: Usb Download

Page 12: Block Diagram

Page 13: Exploded View

Page 22: Chassis Assembly

Page 29: Troubleshooting Guide

Page 36: Power Error

Page 69: Checking Method

Page 75: Time Shift

LG OLED48CXPTA Service Manual

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Summary of Contents for LG OLED48CXPTA

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