LG 55UJ630V Service Manual
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LG 55UJ630V Service Manual

Chassis : ud74p
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LED TV
SERVICE MANUAL
CHASSIS : UD74P
MODEL : 55UJ630V
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL69879810 (1703-REV00)
Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
CONFIDENTIAL
55UJ630V-ZA

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Summary of Contents for LG 55UJ630V

  • Page 1 LED TV SERVICE MANUAL CHASSIS : UD74P MODEL : 55UJ630V 55UJ630V-ZA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL69879810 (1703-REV00) Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 2 SPECIFICATION ..................6 SOFTWARE UPDATE ................11 BLOCK DIAGRAM .................. 12 EXPLODED VIEW .................. 25 DISASSEMBLY GUIDE ................26 TROUBLE SHOOTING GUIDE ..........APPENDIX - 2 - Copyright © LG Electronics. Inc. All rights reserved. Only for 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 for training and service purposes...

  • Page 4: Servicing Precautions

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

  • Page 6: Specification

    BIRD3 5.0W , BADR 26.0E , DIRECTV-1R 56.0E , EUROBIRD 9A 9.0E , EUROBIRD3 33.0E , EUTELSAT 36 A/B 36.0E , EUTELSAT W2A 10.0E , EUTELSAT W3A 7.0E , EUTELSAT7WA 7.3W - 6 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 7 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 Input Voltage AC 100 ~ 240V ,50/60Hz - 7 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 8 67.50 30.00 297.00 UDTV 2160P UHD only 4096*2160 53.95 23.97 296.703 UDTV 2160P UHD only 4096*2160 54.00 24.00 297.00 UDTV 2160P UHD only - 8 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 9 112.50 50.00 594.00 UDTV 2160P(DVB) UHD only 4096*2160 134.86 59.94 593.41 UDTV 2160P UHD only 4096*2160 135.00 60.00 594.00 UDTV 2160P UHD only - 9 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 10 2D to 3D, Side by Side, 1280*720 37.50 74.25 HDTV 720P Top & Bottom 2D to 3D, Side by Side, 1920*1080 28.13 74.25 HDTV 1080I Top & Bottom - 10 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...

  • Page 11: Software Update

    (7) Click [Yes] : TV will be DC OFF -> ON (8) After TV turned on, Check the updated SW Version and Tool Option. - 11 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...

  • Page 12: Block Diagram

    BLOCK DIAGRAM 1. K3Lp Block Diagram (External) - 12 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 13 2. K3Lp Block Diagram (Internal) - 13 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 14 3. EPI / CEDS Block Diagram - 14 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 15 4. Tuner - 15 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...

  • Page 16: Video & Audio In/Out

    5. Video & Audio IN/OUT - 16 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 17 6. HDMI 2.0 Block - 17 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 18 7. USB / WIFI / M-REMOTE / UART(Debug) - 18 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 19 8. K3Lp I2C Map - 19 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 20 9. GPIO(K3Lp) - 20 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 21 10. GPIO(MICOM – RENESAS) - 21 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 22 11. DDR Block - 22 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 23 12. K3Lp Power Block - 23 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 24 13. K3Lp Power Block2 - 24 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...

  • Page 25: 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. - 25 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...

  • Page 26: Disassembly Guide

    DISASSEMBLY GUIDE 1. After Screw Disassemble, please remove B/C from Module 2. Detach Tape Detach tape - 26 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 27 3. Remove all sort of cable 4. IR assy, WiFi PCB assy disassembly Disassemble screw (1ea) and Remove wi-fi cable Remove IR cable - 27 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...

  • Page 28: Speaker Disassembly

    5. Screw disassembly 6. Speaker disassembly (Disassemble b a ) - 28 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 29 7. Screw disassembly Disassemble squence (a b ) - 29 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes...

  • Page 30: Troubleshooting Guide

    TROUBLE SHOOTING GUIDE Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 31 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 32 ☞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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 33 Check various Check and voltages of Power Normal No Video/ replace Board ( 13V) voltage? No audio MAIN B/D Replace Power Board and repair parts Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 34 1. Reconnection 2. Install Booster S/W Upgrade Normal Contact with signal distributor Picture? or broadcaster (Cable or Air) Normal Picture? Replace Main B/D Close Close Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 35 /Cable device and error normal cable Request repair for external device/cable Check external External device HDMI device and Replace Main/T-con B/D /Cable error cable normal Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 36 Replace screen? Screen (Check normal operation of Main /T-con External Input, Component, normal? and HDMI by connecting Jig, pattern Generator ,Set-top Box etc. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...

  • Page 37: Power Error

    Measure voltage of each output of Power B/D Normal? Normal Replace Main B/D voltage? Close Normal Check ST-BY 3.5V voltage? ☞A18 Replace Power B/D Replace Power Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 38 "POWEROFF_UNKNOWN" Power off by unknown status except listed case "POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble Abnormal "POWEROFF_CPUABNORMAL" Power off by CPU Abnormal Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 39 A13V of Power Screen normal voltage Speaker off Board Cancel OFF Replace Power Board and repair parts Check Replace MAIN Board Disconnection Speaker disconnection Replace Speaker Copyright © 2017 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 © 2017 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 Explain the customer operating? cause is interference from light in room. Replace R/C Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 42 MR15RA Close Down load the Firmware • If you conduct the loop at 3times, change the Magic Remote. * INSTART MENU12.RF Remocon TestReceiver Firmware download Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 43 “NG”? Voltage? 1pin Main B/D ☞A24 Close Check & Repair Wifi cable connection ☞A4 Wi-Fi Mac value Close is “NG”? Change the Wifi assy Copyright © 2017 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 external device/cable Recognition error accordance with technical information Copyright © 2017 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 46 Revised date 15/15 Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote Replace remote control control damage Stand Replace stand dent Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 47 Defected Type caused by T-Con/ Exchange Power Board (PSU) A-3/5 Inverter/ Module Exchange Module (1) A-4/5 Exchange Module (2) A-5/5 Continue to the next page Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 48 Voltage and speaker checking method when there is no audio Remote control operation checking method D. Function error Motion Remote operation checking method Wifi operation checking method Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 49 <55UJ63##_LGD MODULE> After turning on the power and disassembling the case, check with the naked eye, whether you can see light from locations. A1 -1 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 50 <55UJ63##_BOE MODULE> After turning on the power and disassembling the case, check with the naked eye, whether you can see light from locations. A1 -2 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 51 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 52 <ALL MODELS>  All Settings Programmes Programme Tuning & Settings  Manual Tuning When the signal is strong, use the attenuator (-10dB, - 15dB, -20dB etc.) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 53 Content Version checking method date <ALL MODELS> 1. Checking method for remote control for adjustment Version Press the IN-START with the remote control for adjustment Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 54 2. After measuring each voltage from power supply, finally replace the MAIN BOARD. 3. If you can`t see the UHD live TV, please connect signal at left side of jack. (Korea model only) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 55 Revised Content Connection diagram (1) date <ALL MODELS> As the part connecting to the external input, check the screen condition by signal Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 56 A. Video error_Color error symptom date Revised Content Check Link Cable(EPI) reconnection condition date <55UJ63##-Z#> Check the contact condition of the Link Cable, especially dust or mis insertion. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 57 You can view 6 types of patterns using the ADJ Key Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..) 4.Video error (Classification of MODULE or Main-B/D!) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 58 Abnormal Power Section Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, Short/Crack Solder defect, Short/Crack A - 1/5 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 59 Abnormal Power Section Abnormal Power Section Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack Noise GRADATION GRADATION A - 2/5 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 60 Appendix : Exchange Power Board (PSU) No Light Dim Light Dim Light Dim Light No picture/Sound Ok A - 3/5 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 61 Appendix : Exchange the Module (1) Press damage Press damage Press damage Crosstalk Crosstalk Un-repairable Cases In this case please exchange the module. A - 4/5 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 62 Gate TAB IC Defect Un-repairable Cases In this case please exchange the module. Horizontal Block Gate TAB IC Defect Gate TAB IC Defect A - 5/5 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 63 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power symptom date Revised Content Check front Power Indicator date <ALL MODELS> Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 64 Check power input voltage and ST-BY 3.5V Content date Values Backlight Forward Symbol Unit Voltage 55UJ63 123.6 130.4 141.2 Check the DC 13.2V line for ST-BY Voltage Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 65 POWER OFF MODE checking method date <ALL MODELS> Entry method 1. Press the IN-START button of the remote control for adjustment 2. Check the entry into adjustment item 3 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...

  • Page 66: 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 67 3.Connect the tester RX1 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 68 2.Check the standby 3.5V on the terminal 25 pin (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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 69 Checking order to check wifi Checking order 1.Check BT/Wifi cable condition between BT/Wifi assy & Main board. 2.Check the 3.5V on the terminal 1 (+3.5V_WIFI) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes...

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