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LG 42UB820V Service Manual
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LG 42UB820V Service Manual

Chassis : ld48v
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LED TV
SERVICE MANUAL
CHASSIS : LD48V
MODEL : 42UB820V
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL68320905 (1407-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
42UB828V
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
42UB820V-ZH
42UB828V-ZH
Printed in Korea

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Summary of Contents for LG 42UB820V

  • Page 1 Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LED TV SERVICE MANUAL CHASSIS : LD48V MODEL : 42UB820V 42UB820V-ZH 42UB828V 42UB828V-ZH CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL68320905 (1407-REV00) Printed in Korea...
  • Page 2 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION .............. 15 BLOCK DIAGRAM .................. 23 EXPLODED VIEW .................. 24 SCHEMATIC CIRCUIT DIAGRAM .............. - 2 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 3 An other abnormality exists that must be corrected before the receiver is returned to the customer. - 3 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 4 - 4 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only 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. LGE Internal Use Only Only for training and service purposes...
  • Page 6 39.0E/ HISPASAT1CDE 30.0W/ HOTBIRD 13.0E/ INTELSAT10&7 68.5E/ INTELSAT15 85.2E/ INTELSAT904 60.0E/ NILESAT 7.0W/ THOR 0.8W/ TURKSAT 42.0E/ YAMAL201 90.0E - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 DVB-S2 mode : 1/2, 2/3, 3/4, 3/5, 4/5, 5/6, 8/9, 9/10 Input Voltage AC 100 ~ 240 V, 50/60 Hz - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 HDTV 1080I 1920*1080 33.75 60.00 74.25 HDTV 1080I 1920*1080 56.25 50.00 148.50 HDTV 1080P 1920*1080 67.50 60.00 148.50 HDTV 1080P - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 593.41 UDTV 2160P 8 bit / YCbCr 4:2:0 4096*2160 135.00 60.00 594.00 UDTV 2160P 8 bit / YCbCr 4:2:0 - 9 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 UDTV 2160P 3840*2160 67.50 30.00 297.00 UDTV 2160P 4096*2160 53.95 23.98 297.00 UDTV 2160P 4096*2160 54.00 24.00 297.00 UDTV 2160P - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 HDTV 2160P 2D to 3D, Top & Bottom(half), Side by Side(half), (8 bit, YCbCr 4:2:0) 135.00 60.00 594.00 HDTV 2160P - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12 56.25 50.00 148.50 Side-by-side(half) Secondary(HDTV 1080P) Top-and-Bottom Primary(HDTV 1080P) 67.43 / 67.50 59.94 / 60.00 148.35/148.50 Side-by-side(half) Secondary(HDTV 1080P) - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 2D to 3D, Side by Side(half), Top & Bottom 1920*1080 33.71 29.97 74.18 HDTV 1080P 2D to 3D, Side by Side(half), Top & Bottom - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 Frame Line Column Side by Side Top & Bottom Checker board 2D to 3D Sequential Packing Interleaving Interleaving iii. - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 47LA660S-ZA.KEUYLJG ▪ Play: Press Enter key ▪ Result: Ready, Test, OK or NG ▪ Printer Out (MAC Address Label) - 15 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16 4) Check the model name Instart menu. → Factory name displayed. (ex 47LB650V-ZA) 5) Check the Diagnostics.(DTV country only) → Buyer model displayed. (ex 47LB650V-ZA) - 16 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 Monthly : ‘01’ → ‘01’, Year : ‘2014’ → ‘18’ 00 FD 00 ⓓ Model Name(Hex): LGTV 3E 1E 0A 20 00 FC ⓔ Checksum(LG TV): Changeable by total EDID data. 00 4C 47 0A 20 ⓕ Vendor Specific(HDMI) - 17 - Copyright ©...
  • Page 18 G Gain Signal Source Warm B Gain * If TV internal pattern is used, not needed R Cut G Cut - 18 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 - In case of LCD, Back-light on should be checked Agingtime using no signal or Full-white pattern. (Min) 6-10 11-20 21-30 31-40 41-50 51-80 81-119 Over 120 - 19 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 Country Group then on the lower Country option, select US, CA, MX. Selection is done using +, - or ►◄ KEY. - 20 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 (1) RF input: Mono, 1 KHz sine wave signal, 100 % Modulation (2) CVBS, Component: 1 KHz sine wave signal 0.5 Vrms - 21 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 2) Select "Tool Option 1" and push "OK" key. 3) Punch in the number. (Each model has their number.) - 22 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 BLOCK DIAGRAM - 23 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 24 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LM14 SYSTEM Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LM14 POWER 11/05/31 Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LM14 INPUT Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LM14 DDR Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 UB83 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. POWER Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 30 UB83 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MICOM Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. HDMI JACK Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. AV&COMP JACK Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 2013-10-28 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. IR/KEY/WIFI/BT Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 34 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR USB JACK THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LAN JACK Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 36 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MAIN AMP Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR HEADPHONE AMP THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 38 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. TU CIRCUIT Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 39 UB83 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. TU_SYMBOL Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 40 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR RS232C THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 41 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 42 UB83 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR EMMC THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 43 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. SCART JACK Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 44 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. SCART JACK Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 45 2013.04.29 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. PCMCI Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 46 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR U_LVDS INPUT THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 47 2013.12.17 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR Output_wafer THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 48 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR 0.1uF THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 2013.12.17 4th layer URSA7_DDR Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 2013.12.17 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 50 2013.12.17 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. U_Power Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 51 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 2013.12.17 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 53 Contents of LCD TV 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 B.
  • Page 54 Standard Repair Process Established A. Video error 2013.01.31 Error date LCD TV symptom No video/ Normal audio Revised date 1/16 First of all, Check whether all of cables between board is inserted properly or not. (Main B/D↔ Power B/D, LVDS Cable, Speaker Cable, IR B/D Cable,,,) ☞A1 ☞A18 No video...
  • Page 55 Standard Repair Process Established A. Video error 2013.01.31 Error date LCD TV symptom No video/ No audio Revised date 2/16 ☞A18 Check various Check and Normal voltages of Power No Video/ replace voltage? Board ( 3.5V,12V,20V No audio MAIN B/D or 24V…) Replace Power Board and repair...
  • Page 56 Standard Repair Process Established A. Video error 2013.01.31 Error date LCD TV symptom Picture broken/ Freezing Revised date 3/16 . By using Digital signal level meter ☞ A3 . By using Diagnostics menu on OSD ( Setting→ Support → Signal Test ) Check RF Signal level - Signal strength (Normal : over 50%) - Signal Quality (Normal: over 50%)
  • Page 57 Standard Repair Process Established A. Video error 2013.01.31 Error date LCD TV symptom Color error Revised date 4/16 ☞ A7 ☞A6 ※ Check Check color by input and replace -External Input Link Cable Color Color Color -COMPONENT Replace Main B/D Replace module error? (V by one)
  • Page 58 Standard Repair Process A. Video error Established 2013.01.31 Error date LCD TV symptom Vertical / Horizontal bar, residual image, Revised date 5/16 light spot, external device color error Vertical/Horizontal bar, residual image, light spot Replace Module ☞A6 ☞ A7 Check color condition by input Check external Check and -External Input...
  • Page 59 Standard Repair Process Established B. Power error 2013.01.31 Error date LCD TV symptom No power Revised date 6/16 ☞A17 ☞A18 DC Power on Replace Check Power LED Normal Check Power by pressing Power Key Power On ‘”High” Logo LED operation? On Remote control .
  • Page 60 Standard Repair Process Established B. Power error 2013.01.31 Error date LCD TV symptom Off when on, off while viewing, power auto on/off Revised date 7/16 Check outlet ☞A19 Check Power Off Check A/C cord Error? Replace Main B/D Normal? Mode Abnormal Check for all 3- phase Replace Power B/D...
  • Page 61 Standard Repair Process Established C. Audio error 2013.01.31 Error date LCD TV symptom No audio/ Normal video Revised date 8/16 ☞A20 ☞A21+A18 Check user Check audio B+ No audio Normal menu > 24V of Power Screen normal voltage Speaker off Board Cancel OFF Replace Power Board and repair parts...
  • Page 62 Standard Repair Process Established C. Audio error 2013.01.31 Error date LCD TV symptom Wrecked audio/ discontinuation/noise Revised date 9/16 → abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio ☞A21+A18 Wrecked audio/ Check and replace Discontinuation/ Check audio speaker and B+ Voltage (24V) Noise for...
  • Page 63 Standard Repair Process D. Function error Established 2013.01.31 Error date LCD TV symptom Remote control & Local switch checking Revised date 10/16 1. Remote control(R/C) operating error Replace Main B/D ☞A22 ☞A22 ☞A22 Check & Repair Check B+ Check R/C itself Normal Normal Normal...
  • Page 64 Standard Repair Process D. Function error Established 2013.01.31 Error date LCD TV symptom MR operating checking Revised date 11/16 2. MR(Magic Remocon) operating error ☞A4 Check the RF Receiver ver Check MR itself Normal Turn off/on the Press the Is show ok INSTART menu is “00.00”? operating?
  • Page 65 Standard Repair Process D. Function error Established 2013.01.31 Error date LCD TV symptom Wifi operating checking Revised date 12/16 3.Wifi operating error ☞A4 ☞A24 Check the Wi-Fi Mac value Check the Wifi wafer Normal Replace INSTART menu is “NG”? Voltage? 1pin Main B/D ☞A24...
  • Page 66 Standard Repair Process Established D. Function error 2013.01.31 Error date LCD TV symptom External device recognition error Revised date 14/16 Check technical Check External Input and information Signal Technical input Replace Main B/D Component - Fix information input? information? signal Recognition error - S/W Version HDMI/...
  • Page 67 Standard Repair Process Established E. Noise 2013.01.31 Error date LCD TV symptom Circuit noise, mechanical noise Revised date 15/16 Identify Check location Circuit nose Replace PSU of noise noise type Check location of Mechanical noise noise ※ When the nose is severe, replace the module (For models with fix information, upgrade the ※...
  • Page 68 Standard Repair Process Established F. Exterior defect 2013.01.31 Error date LCD TV symptom Exterior defect Revised date 16/16 Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote controller Replace remote controller damage Stand Replace stand dent...
  • Page 69 Contents of LCD TV Standard Repair Process Detail Technical Manual Error symptom Content Page Remarks Check LCD back light with naked eye 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 LCD-TV Version checking method Tuner Checking Part...
  • Page 70 Contents of LCD TV 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 & ST-BY 3.5V B. Power error_Off when on, off POWER OFF MODE checking method while viewing Checking method in menu when there is...
  • Page 71 Standard Repair Process Detail Technical Manual Error Established error_No A. Video video/Normal audio 2013.01.31 symptom date LCD TV Revised Content Check LCD back light with naked eye date <XXUB83/820X-XX> After turning on the power and disassembling the case, check with the naked eye, whether you can see light from locations.
  • Page 72 Standard Repair Process Detail Technical Manual Error Established error_No A. Video video/Normal audio 2014.02.14 symptom date LCD TV Revised Content Check White Balance value date <ALL MODELS> Entry method Entry method 1. Press the ADJ button on the remote controller for adjustment. 1.
  • Page 73 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop 2014.02.14 symptom date LCD TV Revised TUNER input signal strength checking method Content date <ALL MODELS> MENU  support  signal test  select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.)
  • Page 74 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop 2014.02.14 symptom date LCD TV Revised LCD-TV Version checking method Content date <ALL MODELS> 1. Checking method for remote controller for adjustment Version Press the IN-START with the remote controller for adjustment...
  • Page 75 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop 2014.02.14 symptom date LCD TV Revised TUNER checking part Content date <ALL MODELS> Checking method: 1. Check the signal strength or check whether the screen is normal when the external device is connected. 2.
  • Page 76 Standard Repair Process Detail Technical Manual Error A. Video error _Vertical/Horizontal bar, Established 2014.02.14 symptom residual image, light spot date LCD TV Revised Content LCD TV connection diagram (1) date <ALL MODELS> As the part connecting to the external input, check the screen condition by signal...
  • Page 77 Standard Repair Process Detail Technical Manual Error Established A. Video error_Color error 2014.02.14 symptom date LCD TV Revised Content Check Link Cable (LVDS) reconnection condition date <ALL MODELS> Check the contact condition of the Link Cable, especially dust or mis insertion. * Tuner is different from region...
  • Page 78 Standard Repair Process Detail Technical Manual Error Established A. Video error_Color error 2014.02.14 symptom date LCD TV Revised Adjustment Test pattern - ADJ Key Content date You can view 6 types of patterns using the ADJ Key Checking item : 1. Defective pixel 2.
  • Page 79 Appendix : Exchange Main Board (1) Solder defect, CNT Broken Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken T-Con Defect, CNT Broken 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...
  • Page 80 Appendix : Exchange Main Board (2) 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...
  • Page 81 Appendix : Exchange Power Board (PSU) No Light Dim Light Dim Light Dim Light No picture/Sound Ok A - 3/5...
  • Page 82 Appendix : Exchange the Module (1) Panel Mura, Light leakage Panel Mura, Light leakage Press damage Crosstalk Press damage Crosstalk Un-repairable Cases In this case please exchange the module. Press damage A - 4/5...
  • Page 83 Appendix : Exchange the Module (2) Vertical Line Vertical Block Vertical Block Source TAB IC Defect Source TAB IC Defect Source TAB IC Defect Horizontal Block Horizontal line Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Un-repairable Cases...
  • Page 84 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power 2014.02.07 symptom date LCD TV Revised Content Check front Power Indicator date <XXUB83/820X-XX> ST-BY condition: On or Off Power ON condition: Turn Off...
  • Page 85 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power 2014.02.05 symptom date LCD TV Revised Content Check power input voltage and ST-BY 3.5V date Check the DC 24V, 12V, 3.5V. P_main Maker : Yeonho 28Pin SMAW200-H28S5K ’14년...
  • Page 86 Standard Repair Process Detail Technical Manual Error Established B. Power error _Off when on, off whiling viewing 2014.02.05 symptom date LCD TV Revised Content POWER OFF MODE checking method date <ALL MODELS> Entry method 1. Press the IN-START button of the remote controller for adjustment 2.
  • Page 87 Standard Repair Process Detail Technical Manual Error Established C. Audio error_No audio/Normal video 2014.02.05 symptom date LCD TV Revised Content Checking method in menu when there is no audio date <XXUB83/820X-XX> Checking method 1. Press the Setting button on the remote controller 2.
  • Page 88 Standard Repair Process Detail Technical Manual Error Established C. Audio error_No audio/Normal video 2014.02.05 symptom date LCD TV Revised Voltage and speaker checking method Content date when there is no audio <XXUB83/820X-XX> PWR ON DVR_ON P_DIM #1 PDIM #2 3.5V ①...
  • Page 89 Standard Repair Process Detail Technical Manual Error Established D. Function error 2014.02.07 symptom date LCD TV Revised Content Remote controller operation checking method date <XXUB83/820X-XX> Front +3.5V WOL BT_RESET USB_DM USB_DP Back KEY1 KEY2 ③ +3.5V_ST ② LED_R ① Wifi/ BT Combo Checking order to check remote controller Checking order 1.Check IR cable condition between IR &...
  • Page 90 Standard Repair Process Detail Technical Manual Error Established D. Function error 2014.02.07 symptom date LCD TV Revised Content Motion Remote / Wifi operation checking method date <XXUB83/820X-XX> Front +3.5V WOL BT_RESET USB_DM USB_DP Back KEY1 KEY2 ③ +3.5V_ST ② LED_R ①...

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