Manuel d'utilisation / d'entretien du produit 50LN54**-Z* du fabricant LG Electronics
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Printed in Korea P/NO : MFL67729502 (1302-REV00) CHASSIS : LD31B/LD36B MODEL : 50LN54** 50LN54**-Z* 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.
- 2 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes CONTENTS CONTENTS .............................................................................................. 2 SAFETY PRECAUTIONS .
- 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 .
- 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.
- 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.
- 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 LD31B/ LD36B chassis.
- 7 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes No. Item Specication Remarks 2 Broadcasting system Analogue TV 1) P AL-BG 2.
- 8 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 5. V ideo resolutions (2D) 5.1. Component Input (Y , C B /P B , C R /P R ) No. Resolution H-freq(kHz) V -freq(Hz) Pixel clock(MHz) Proposed 1 720*576 15.
- 9 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 6. V ideo resolutions (3D) 6.1. HDMI Input No. Resolution H-freq(kHz) V -freq(Hz) Pixel clock(MHz) Proposed 3D input proposed mode 1.
- 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 LD31B/ LD36B chassis. 2.
- 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 .
- 12 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 4. T otal Assembly line process 4.1. White Balance adjustment ▪ W/B Equipment condition CA210 : LED -> CH14, T est signal: Inner pattern(80IRE) ▪ Above 5 minutes H/run in the inner pattern.
- 13 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes How to adjust 1) In case G gain more than 172 Adjust R Gain and B Gain less than 192 2) if the G gain value be adjusted down to 172 G gain increase to 172 and R gain / B gain increase same as G gain increases.
- 14 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 4.5. Outgoing condition Configuration ■ When pressing IN-STOP key by SVC remocon, Red LED are blinked alternatively . And then automatically turn off.
- 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.
- 16 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes LV D S (F HD /50H z) S PK L/R F P C (51P) A UD_MASTER_CLK, A UD_L R CH , A UD.
- 17 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes TDSQ- G601 D(B) (LGIT) A TV _Video ( Analog) A TV _SIF ( Analog) LV D S (F HD.
- 18 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes S PDIF Co mponent1 TDSS - G501 D(B ) (LGIT) A IF, DIF SI F S7L R - M (L GE 21.
- 19 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes A2 A9 A10 900 200 400 540 521 530 301 500 910 120 300 510 123 122 Set + Stand Stand Base + Stand Body L V1 EXPLODED VIEW Many electrical and mechanical parts in this chassis have special safety-related characteristics.
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.
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.
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.
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.
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.
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.
Fiber Optic Fiber Optic 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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Normal audio Y N Move to No video/No audio No video Normal audio Check Back Light On w ith naked eye On Y N Check Pow er Board 24v, 12v,3.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Normal voltage? Check v ario us voltages of Pow er Board ( 3.5V,12V,20V or 24V…) No Video/ No audio Check and replace MAIN B/D Y Replace Pow er Board and repair parts N End Standard Repair Process A .
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only A . Video error Picture broken/ Freezing Y N ☞ A5 N Check RF Signal level Normal Signal? Check RF Cable Connection 1. Reconnection 2.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only A . Video err or Tuning fail, Picture broken/ Freezing Y N ☞ A5 Check RF Si.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Color error? Y N ※ Check and replace Link Cable (LVDS) and contact conditio.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Screen normal? N Y Check ex ternal device connecti on conditio n Y N Check an.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only B. Po w er error No power Power LED On? Y N DC Pow er on by pressing Pow er K.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only B. Power error Off when on, off while viewing, power auto on/off Error? N Y C.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only No audio Screen normal Check user menu > Speaker off Off N Y Cancel OFF Ch.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only → abnormal audio/discontinuation/noise is same after “Check input signal” compa red to No audio C.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only D. Fu nction error Remote control & Local switch checking Y N 1.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Check technical inform ation - Fix information - S/W Version N Y Technical in.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Check locati on of noi se Identify nose type Circuit noise Replace PS U(with .
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Replace module Zoom part w ith exterior damage Modu le damage Cabinet damage Replace cabine t Replace remote controller Remote controller damage Stand dent Replace stand F .
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Contents of LCD TV Standard Repair Process Detail T echnical Manual No.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Contents of LCD TV Standard Repair Process Detail T echnical Manual N o. Error sympt om Conte nt Page Remar ks 21 B. Power error_No power Check front display LED A11 22 Check power inpu t Voltage & ST-BY 3.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Standard Repair Process Detail T echnical Manual Check Back Light On with naked ey e A .
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only 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 93.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Standard Repair Process Detail T echnical Manual Check White Balance value A . Video error_No video /Normal aud io <ALL MODELS> A3 Established date Revised date Error symptom Content LCD TV Entry me thod 1.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only 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 , 12V , 3.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only MENU => Press red key Remote controlle r=>signal test => Select channel W hen the signal is strong, use the attenuator (-10dB , -15dB, -20dB etc.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Standard Repair Process Detail T echnical Manual LCD-TV Version checking method A . Video error_Video error , v ideo lag/stop 1.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Standard Repair Process Detail T echnical Manual LCD TV connection diagram (1) A .
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only 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.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only 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.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Solder de fect, CNT Broken T -Con Defe ct, CNT Broken T -Con Defe ct, CNT Bro.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Abnormal Power Section Solder de fect, Short/Crack Abnormal Power Section Sol.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only A ppendix : Exchange PSU(LED driv er) No Lig ht Dim Lig ht Dim Lig ht Dim Lig.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only 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.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only V ertical Block Source T AB IC Defect Horizontal Block Gate T A B IC Defect G.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Standard Repair Process Detail T echnical Manual Check front display LED B.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only 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 Check the DC 24V , 12V , 3.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only 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 Check the DC 24V , 12V , 3.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only 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.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Standard Repair Process Detail T echnical Manual Checking method in menu when 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.
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Checking order when there is no audio ① Check the con tact condition of or .
Copyrigh t © 2013 LG Elect ronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only Checking order 1, 2. Check IR cable condition between IR & Main board.
Un point important après l'achat de l'appareil (ou même avant l'achat) est de lire le manuel d'utilisation. Nous devons le faire pour quelques raisons simples:
Si vous n'avez pas encore acheté LG Electronics 50LN54**-Z* c'est un bon moment pour vous familiariser avec les données de base sur le produit. Consulter d'abord les pages initiales du manuel d'utilisation, que vous trouverez ci-dessus. Vous devriez y trouver les données techniques les plus importants du LG Electronics 50LN54**-Z* - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation LG Electronics 50LN54**-Z*, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le LG Electronics 50LN54**-Z* va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le LG Electronics 50LN54**-Z*, mais vous avez pas encore lu le manuel d'utilisation, vous devez le faire pour les raisons décrites ci-dessus,. Vous saurez alors si vous avez correctement utilisé les fonctions disponibles, et si vous avez commis des erreurs qui peuvent réduire la durée de vie du LG Electronics 50LN54**-Z*.
Cependant, l'un des rôles les plus importants pour l'utilisateur joués par les manuels d'utilisateur est d'aider à résoudre les problèmes concernant le LG Electronics 50LN54**-Z*. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei LG Electronics 50LN54**-Z* ainsi que les instructions sur la façon de les résoudre. Même si vous ne parvenez pas à résoudre le problème, le manuel d‘utilisation va vous montrer le chemin d'une nouvelle procédure – le contact avec le centre de service à la clientèle ou le service le plus proche.
