LG Electronics 32LN52**-ZA manual

Printed in Korea P/NO : MFL67729505 (1304-REV00) CHASSIS : LD36M MODEL : 32LN52** 32LN52**-ZA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. LED TV SER VICE MANUAL North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com Internal Use Only[...]

- 2 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes CONTENTS CONTENTS .............................................................................................. 2 SAFETY PRECAUTIONS ........................................................................ 3 SERVICING PRECAUTIO[...]

- 3 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Exploded View . It is essential that these special safety parts should [...]

- 4 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes SER VICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this publication. NOTE : If unforeseen circumstances [...]

- 5 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent at against the cir- cuit foil. When holes are the slotted type, the following technique shoul[...]

- 6 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes SPECIFICA TION NOTE : Specifications and others are subject to change without notice for improvement . 1. Application range This specification is applied to the LED TV used LD36M chassis. 2. Requirement for T est Each part is te[...]

- 7 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes No. Item Specication Remarks 1 Market EU(P AL Market-37Countries) DTV & Analog (T otal 37 countries) DTV (MPEG2/4, DVB-T) : 37 countries UK/Italy/Germany/France/Spain/Sweden/Finland/Neth- erlands/ Belgium/Luxemburg/ Greec[...]

- 8 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 5. External Input Support format 5.1. HDMI Input 1 (PC/DTV) No. Resolution H-freq(kHz) V -freq.(Hz) Pixel clock(MHz) Proposed Remark PC(DVI) DDC 1 640*350 31.468 70.09 25.17 EGA X 2 720*400 31.469 70.08 28.32 DOS O 3 640*480 31.[...]

- 9 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes Category Item Specication Remark Photo JPG, PNG, BMP , TIF , TIFF , GIF 4096X4096 Slide Show support. Background music support Music MP3 32kbps ~ 320kbps(Bit rate) 32kHz ~ 48kHz(Sample rate) WMA 128bps ~ 320kbps(Bit rate) 8kH[...]

- 10 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes ADJUSTMENT INSTRUCTION 1. Application Range This specification sheet is applied to all of the LED TV with LD36M chassis. 2. Designation (1) The adjustment is according to the order which is designated and which must be followed[...]

- 1 1 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes * After downloading, have to adjust T ool Option again. (1) Push "IN-ST AR T" key in service remote control. (2) Select "T ool Option 1" and push "OK" key . (3) Punch in the number . (Each model h[...]

- 12 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 3.4. Function Check - Check display and sound ■ Check Input and Signal items. 1) TV 2) A V (SCART / CVBS) 3) HDMI * Display and Sound check is executed by Remote control. <Caution> Not to push the INSTOP key after compl[...]

- 13 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes * Auto-control interface and directions (1) Adjust in the place where the influx of light like floodlight around is blocked. (illumination is less than 10 lux). (2) Adhere closely the Color analyzer(CA210) to the module less th[...]

- 14 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 5. HI-POT T est 5.1. HI-POT auto-check preparation - Check the POWER cable and SIGNAL cable insertion condition 5.2. HI-POT auto-check (1) Pallet moves in the station. (POWER CORD / A V CORD is tightly inserted) (2) Connect the[...]

- 15 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 7. MAC Address & CI+ key download 7.1 MAC Address 7.1.1 Equipment & Condition ▪ Play file : Serial.exe ▪ MAC Address edit ▪ Input Start / End MAC address 7.1.2 Download method (1) Communication Prot connection Con[...]

- 16 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes ■ Screw specification and application situation <W arning> Check Screw T ype When Screw is assembled at 'A' Part. If 'B' Screw is used at the 'A' part, Module will get damaged. SCREW ASSEMB[...]

- 17 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes DISASSEMBL Y WORKING GUIDE Disasse mble 2 screws that bind Stand Ass’ y a nd set Disasse mble 7 screws around t he 4 edg es of set after S epa rati on Stand Ass’ y 1 2 Disasse mble 4 screws that fi x S ide A V bracket and B[...]

- 18 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes NA N D f l as h 1Gbit Buf fe r IC19 02 CI_A DD R[ 0: 14 ] MAIN I C MS TAR MS D8 04K KX IC10 1 IF _P / N PCMCIA (SI DE) FE_TS _D ATA [0 :7] / CL K / V AL/S Y N C CI_TS_D ATA [0: 7] / CLK /V AL/S Y NC HD MI 2 PCM_A [0: 7] Audio A[...]

- 19 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 24V _Adapter 24V LE D D river I C 40 4 D C D C ,I C 12 V Q 40 5 Au dio AMP 24 V I C 40 1 D C D C ,I C 5V U SB , CI, N orm al Q 40 9 12V P AN E L Scart AMP I C 40 0 D C D C ,I C 3.5V Q 40 3 3.3V T U, E EP R OM N A N D, MAI N I C[...]

- 20 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes I 2C _ S C K M2 I 2C _ S C A M2 NVRA M I C 10 4 22 Ω + 3.3V_NO RMAL I 2S _IN_ B C K I 2S _IN_ SD S7LRM MSD8 04 KK X A ud io A MP I C 34 00 I 2C _ S C K M1 I 2C _ S D A M1 1KΩ 33Ω + 3.3V_TU 20 pF T U_A DE MO D 2.2KΩ 1K?[...]

- 21 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes Set + Stand Stand Base + Stand Body A2 A9 A31 A10 900 200 400 540 521 910 120 590 591 L V1 EXPLODED VIEW Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identifi[...]

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. IR/CONTROL 2012/07/18 6 NC4_S7LRM C607 0.1uF 16V OPT R601 [...]

USB DOWN STREAM THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 13/03/27 USB 7 NC4_S7LRM JK700 3AU04S-305-[...]

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. S_FLASH_OS 2012/06/20 13 NC4_S7LRM SPI_SCK +3.5V_ST +3.5V_[...]

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. PCMCI 2013/03/25 19 NC4_S7LRM FE_TS_DATA[7] CI_ADDR[4] CI_[...]

THERMAL THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 2013/02/05 AMP_STA380BWEF 34 NC4_S7LRM SPK_L+ +3.5[...]

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 2012/06/20 MSTAR DEBUG_4PIN 39 NC4_S7LRM RGB_DDC_SCL RGB_D[...]

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. RS232C_4P_OS 2012/06/20 40 NC4_S7LRM PM_RXD +3.5V_ST R4001[...]

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 2012/07/04 EU_TP(ERRC) 41 NC4_S7LRM HP_DET BR_RESET_DEMOD [...]

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. M1_DDR (1DDR) 2012/06/21 54 NC4_S7LRM A-MDMU A-MWEB A-MA7 [...]

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. REAR_JACK_EU_OS_ERRC_LN52 2013/03/07 66 NC4_S7LRM JK2801 P[...]

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 2012/11/28 Adapter_HDMI_R2_LN52 67 NC4_S7LRM CK-_HDMI2 R82[...]

THERMAL THERMAL THERMAL THERMAL THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Adapter Power 2013/04/17 6[...]

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. D6900 1N4148W IC6900 MAP3202SIRH 3 GATE 2 VCC 4 GND 1 EN 6[...]

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 2013/04/17 MAIN2_EU_LN52 2 NC4_S7LRM AVDD_AU33 MODEL_OPT_5[...]

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LN52_LVDS_EU 2013/02/28 71 NC4_S7LRM R1100 3.3K OPT RXA1+ [...]

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 2013/01/10 MAIN1_EU_OS 1 NC4_S7LRM_Adapter PCM_D[0] PCM_A[[...]

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 2013/02/05 TUNER_EU_ERRC 85 NC4_S7LRM IC2603 AP1117E18G-13[...]

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1 / 36 Normal audio Y N Move to No video/No audio No video Normal audio Check Back Light On with naked ey e On Y N Check DC24V from Adapter Normal voltage Y N Replace T-con Board or module Repair Power Board or parts Check Power Board 85~175VV output Normal voltage Y Rep lace module N Repair Power Board or parts End Alway s c heck & record S/W [...]

2 / 36 Normal voltage? Check DC24V from Adapter No Video/ No audio Check and replace MAIN B/D Y Replace Power Board and repair parts N End Standard Repair Process A . Video err or No video/ No audio ☞ A4 Established date Revised date 2/14 LCD TV Error symptom 2013. 01 .09 Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for traini[...]

3 / 36 A . Video err or Picture broken/ Freezing Y N ☞ A5 N Check RF Signal level Normal Signal? Check RF Ca ble Connection 1. Reconnection 2. Install Booster Check S/W Version S/W Upgrade Check whether other equipments have problem or not. (By connecting RF Cable at other equipment) → DVD Player ,Set -To p-Box, Different maker TV etc` SVC Bull[...]

4 / 36 A . Video err or Tuning fail, Picture broken/ Freezing Y N ☞ A5 Check RF Signal level Normal Signal? Check S/W Version S/W Upgrade SVC Bulletin? Normal Picture? Y N Y Check R F signal cable (DV B satelli te signal or not) Che ck w hether other equipments have problem or not. (By connecting RF Ca ble at other equipment) → Set -Top-Box, Di[...]

5 / 36 Color error? Y N ※ Check and replace Link Cable (LVDS) and contact condition Y N Replace Main B/D Color error? Check error color input mode Check color by inpu t -External Input - HDMI/DVI Y External device /Cable normal External Input error Check external device and cable Y External device /Cable normal HDMI/DVI error Check external devic[...]

6 / 36 Screen normal? N Y Check external device connection condition Y N Check and replace Link Cable Normal? Y Screen normal? Replace module Check color condition by input -External Input - HDMI End V e rtical/Horizontal bar , residua l image, light spot Request repair for external device A . Video error Vertical / Horizontal bar, residual image, [...]

7 / 36 B. Po w er error No power Power LED On? Y N DC Power on by pressing Powe r Key On Remote control Y N Normal operation? Check Power On ‘”High” Check Power cord was inserted properly Check Power LED Replace Adapter Measure DC 24V from Adapter N Y Normal voltage? Replace Main B/D Y OK? Replace Main B/D N Y Normal? Check ST-BY 3.5V Replace[...]

8 / 36 B. Power error Off when on, off while viewing, power auto on/off Error? N Y Check Power Off Mode Fix A /C cord & Outlet and check eac h 3 phase out Check A /C cord Check for all 3- phase power out Check outlet Replace Main B/D CPU Abnormal (If Power O ff mode is not display ed) Check A dapte r voltage Y N Replace Main B/D Normal voltage?[...]

9 / 36 No audio Screen normal Check user menu > Speaker off Off N Y Cancel O FF Check DC24V from Adapter Normal voltage Y N Replace Adapter Check Speaker disconnection N Y Replace Speaker Replace Main B/D End C. Au dio error No audio/ Normal video ☞ A 15 ☞ A4 Disconnection Established date Revised date 9/14 LCD TV Error symptom Standard Repa[...]

10 / 36 - abnormal audio/discontinuation/noise is same after “Check input signal” compare d to No audio C. Au dio error Wrecked audio/ discontinuation/noise Wrecked audio/ Discontinuation/ Noise for all audio Check and replace speaker and connector Wrecked audio/ Discontinuation/ Noise only for D- TV Wrecked audio/ Discontinuation/ Noise only f[...]

11 / 36 D. Fu nction error Remote control & Local switch checking Y N - Remote control(R /C) operating error Check R/C itself Operation Normal operating? Normal operating? Y Close Replace R/C If R/C operate, Explain the customer cause is interference from light in room. Check R/C Operating When turn off light in room Check & Replace Baterry[...]

12 / 36 Check technical information - Fix information - S/W Version N Y Technical information? Check input signal Signal input? Y N External Input Recognition error Check and fix external device/cable HDMI/DVI Recognition error Replace Main B/D Replace Main B/D Fix in accordance with technical information D. Fu nction error External device recognit[...]

13 / 36 Check location of noise Identify nose type Circuit noise Replace Main B/D Mechanical noise Check location of noise ※ When the nose is severe, replace the module (For models with fix information, upgrade the S/W or provide the description) OR ※ If there is a “Tak Tak” noise from the cabinet, r efer t o the KM S fix information and th[...]

14 / 36 Replace module Zoom part with exterior damage Modu le damage Cabinet damage Replace cabinet Replace remote controller Remote controller damage Stand dent Replace stand F . Exterior defect Exterior defect Established date Revised date 14/14 LCD TV Error symptom Standard Repair Process 2013. 01 .09 Copyright © 2013 LG Electronics. Inc. All r[...]

15 / 36 Contents of LCD TV Standard Repair Process Detail T echnical Manual No. Error symptom Content Page Remarks 1 A. Vi deo error_ No video/Normal audio Check LCD back light with naked eye A1 2 LED driver B+ measu ring method A2 3 Check White Balance value A3 4 Power Board voltage measuring method A4 6 A. Video error_ No video/Video lag/stop TUN[...]

16 / 36 Contents of LCD TV St andard Repair Process Detail T ec hnical Manual No. Error symptom Content Page Remarks 21 B. Power error_No power Check front display LED A11 22 Check power inpu t Voltage & ST-BY 3.5V A12 23 Checking method when power is ON A13 24 POWER BOARD voltage measuring method A4 26 B. Power error_Off when on, off while vie[...]

17 / 36 Standard Repair Process Detail T echnical Manual Check Back Light On with naked ey e A . Video error_No video /Normal aud io <ALL MODELS> A1 Established date Revised date Error symptom Content LCD TV Power On -> disjoint back case -> che ck lighting at 2 points. 2013. 01 .09 Copyright © 2013 LG Electronics. Inc. All rights rese[...]

18 / 36 Standard Repair Process Detail T echnical Manual Inverter B+ 24V measuring method A . Video error_No video /Normal aud io A2 Established date Revised date Error symptom Content LCD TV Measure DC 85_175V applying to M odu le f rom Power Board. Output 85~175V from Pow er Board -> supply to Module. Check Pin c ontacting statement and connec[...]

19 / 36 Entry me thod 1. Press the ADJ button on the remote controller for adjustm ent. 2. Enter into Wh ite Balance of item 9. 3. Afte r recording the R, G, B (GAIN, Cut) v alue of Color T emp (Cool/Medium/ Warm), re- enter the v alue after replacing the MAIN BOARD. Standard Repair Process Detail T echnical Manual Check White Balance value A . Vid[...]

20 / 36 Standard Repair Process Detail T echnical Manual Power Board voltage measuring method A . Video error_No video / A ud io A4 Established date Revised date Error symptom Content LCD TV Check the DC 24V (L421) 2013. 01 .09 Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only[...]

21 / 36 MENU => Press red key Remote controlle r=>signal test => Select channel W hen the signal is strong, use the attenuator (-10dB , -15dB, -20dB etc.) Standard Repair Process Detail T echnical Manual TUNER input signal strength checking method A . Video error_Video error , v ideo lag/stop <ALL MODELS> A5 Established date Revised [...]

22 / 36 Standard Repair Process Detail T echnical Manual LCD-TV Version checking method A . Video error_Video error , v ideo lag/stop 1. Checking method for remote controller for adjustment Press the IN-ST ART with the remote controller for adjustm ent V ersion <ALL MODELS> A6 Established date Revised date Error symptom Content LCD TV 2013. 0[...]

23 / 36 Standard Repair Process Detail T echnical Manual LCD TV connection diagram (1) A . Video error _V e rtical/Horizontal bar , residual image, light spot A s the pa rt connecting to the external input, check the screen condition by signal A7 Established date Revised date Error symptom Content LCD TV <ALL MODELS> 2013. 01 .09 Copyright ©[...]

24 / 36 1. Check and replace LVD S Cable 2. Check LVDS connection condi tion Standard Repair Process Detail T echnical Manual Check and replace Link Cable(LVDS) and contact condition A. V ideo error_Color error <ALL MODELS> A 8/A9 Established date Revised date Error symptom Content LCD TV 2013. 01 .09 Copyright © 2013 LG Electronics. Inc. Al[...]

25 / 36 Standard Repair Process Detail T echnical Manual A djustment T est pattern - ADJ Key A . Video error_Color error Y ou can view 6 ty pes o f patterns using the ADJ Key Checking item : 1. Def ective pix el 2. Residual image 3. MODULE error (ADD -BAR,SCAN BAR..) 4.Video err or (Classificat ion of MODULE or Main-B/D!) A 10 Established date Revi[...]

26 / 36 Solder de fect, CNT Broken T -Con Defe ct, CNT Broken T -Con Defe ct, CNT Broken T -Con Defe ct, CNT Broken Solder de fect, CNT Broken Solder de fect, CNT Broken Solder de fect, CNT Broken Solder def ect, CNT Broken Abnormal Power Section Solder de fect, Short/Crack Abnormal Power Section Solder de fect, Short/Crack A ppendix : Exchange T -[...]

27 / 36 Abnormal Power Section Solder de fect, Short/Crack Abnormal Power Section Solder de fect, Short/Crack Fuse Open, Abnormal pow er section Noise GRADA TION GRADA TION Abnormal Display A ppendix : Exchang e T -Con Board (2) Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only[...]

28 / 36 A ppendix : Exchange PSU(LED driv er) No Lig ht Dim Lig ht Dim Lig ht Dim Lig ht No picture/Sound Ok Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only[...]

29 / 36 A ppendix : Exchange the Module (1) Panel Mura, Light leakage Press damage Crosstalk Crosstalk Press damage Panel Mura, Light leakage Press damage Un -repairable Case s In this ca se pl ease exchange the module. Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only[...]

30 / 36 V ertical Block Source T AB IC Defect Horizontal Block Gate T A B IC Defect Gate T A B IC Defect Gate T AB IC Defect V ertical Line Source T AB IC Defe ct V ertical Block Source T AB IC Defect Horizontal Block Gate T A B IC Defect Horizontal line Gate T A B IC Defect Gate T A B IC Defect Horizontal Block Gate T A B IC Defect A ppendix : Exc[...]

31 / 36 Standard Repair Process Detail T echnical Manual Check front display LED B. Po w er error _N o pow er A 11 Established date Revised date Error symptom Content LCD TV ST -BY condition: Red Front LED control : Menu  Option  Standby light ON 2013. 01 .09 Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and se[...]

32 / 36 Standard Repair Process Detail T echnical Manual Check power input voltage and ST-BY 3.5V B. Power error _No power A 12 Established date Revised date Error symptom Content LCD TV 2013. 01 .09 Check the DC 24V (L421) Check the ST -BY 3.3V (L405) Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and service purpose[...]

33 / 36 Standard Repair Process Detail T echnical Manual Checking method when pow er is ON B. Po w er error _N o pow er A 13 Established date Revised date Error symptom Content LCD TV 2013. 01 .09 Check the DC 24V (L421) Check the LED_ON HIGH (IC6900, pin No. 1) Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for training and servi[...]

34 / 36 Entry method 1. Press the IN-ST AR T button of the remo te controller for adjustment 2. Check the entry into adjustment item 3 Standard Repair Process Detail T echnical Manual POWER OFF MODE checking method B. Power error _Off w hen on, off w hiling viewing <ALL MODELS> A 14 Established date Revised date Error symptom Content LCD TV 2[...]

35 / 36 Standard Repair Process Detail T echnical Manual Voltage and speaker checking method wh en there is no audio C. A udio e rror_No audio/Normal v ideo <ALL MODELS> A 15 Established date Revised date Error symptom Content LCD TV 2013. 01 .09 Check the DC 24V (L3401) Copyright © 2013 LG Electronics. Inc. All rights reserved. Only for tra[...]

36 / 36 Checking order 1. Check IR cable cond ition between IR & Main board. 2. Check the st-by 3.5V on the termina l 4. 3. W hen checking the Pre -Amp when the pow er is in ON condition, it is norm al w hen the Ana log T ester needle moves slowly , and defective when it does not move at all. Standard Repair Process Detail T echnical Manual Rem[...]