LG 55LW5600 Betriebsanleitung

55LW5600055LW56000

1080P

Direct View LCD

55LW5600055LW56000

LED Backlights

Training

LCD-DV Troubleshooting

55" Class 1080P 120Hz LED

TV SmartTV (54.6" diagonally)

Published July 30

, 2011

OUTLINE

Preliminar

Section:

Contact Information, Preliminary Matters, LCD Overview,

General Troubleshooting Steps

Product Information Section

Specifications Menu Information

Disassembly Section:

Removal of Circuit Boards

Cinema 3D Section: Screen design and theory

Product

Information

Section

Specifications

Information

•

Switch Mode Power Supply with LED Backlight

Driver

Troubleshooting Section: Board Operation Troubleshooting of :

Disassembly

Section:

Removal

Circuit

Boards

•

Switch

Mode

Power

Supply

with

LED

Backlight

Driver

•Main Board

•

CON (TFT Panel Driver Board)

•Front IR/Intelligent/Soft Touch Key Board

•

CON

(TFT

Panel

Driver

Board)

•

Speaker

July 2011 LCD TV 55LW56000

•

Speaker

55LW56000

LCD Direct View Display

Overview of Topics to be Discussed

55LW56000

LCD

Direct

View

Display

Section 1

This Section will cover Contact Information and remind the Technician of Important

Safety Precautions for the Customers Safety as well as the Technician and the

Equipment.

Basic Troubleshooting Techniques which can save time and money sometimes can

be overlooked. These techniques will also be presented.

Thi S ti ill t th T h i i f ili ith th Di bl Id tifi ti d

Thi

on w

ill

ili

ar w

ith

sassem

tifi

on an

Layout of the LCD Display Panel.

fS f C

At the end o

this

ection the Technician should be able to Identi

y the

ircuit Boards

and have the ability and knowledge necessary to safely remove and replace any

Circuit Board or Assembly.

July 2011 LCD TV 55LW56000

IMPORTANT SAFETY NOTICE

Preliminary Matters (The Fine Print)

IMPORTANT

SAFETY

NOTICE

The information in this training manual is intended for use by persons possessing an adequate background in

electrical equipment, electronic devices, and mechanical systems. In any attempt to repair a major Product,

personal injury and property damage can result. The manufacturer or seller maintains no liability for the

interpretation of this information, nor can it assume any liability in conjunction with its use. When servicing this

product, under no circumstances should the original design be modified or altered without permission from LG

Electronics. Unauthorized modifications will not only void the warranty, but July lead to property damage or

user injury If wires screws clips straps nuts or washers used to complete a ground path are removed for

user

injury

wires

screws

clips

straps

nuts

washers

used

complete

ground

path

are

removed

for

service, they must be returned to their original positions and properly fastened.

CAUTION

To avoid personal injury, disconnect the power before servicing this product. If electrical power is required for

dia

nosis or test

oses

disconnect the

ower immediatel

after

erformin

the necessar

checks. Also be

gpp, p ypg y

aware that many household products present a weight hazard. At least two people should be involved in the

installation or servicing of such devices. Failure to consider the weight of an product could result in physical

injury.

July 2011 LCD TV 55LW56000

ESD Notice

(Electrostatic Static Discharge)

Today’s sophisticated electronics are electrostatic discharge (ESD) sensitive. ESD can weaken or damage

the electronics in a manner that renders them inoperative or reduces the time until their next failure.

Connect an ESD wrist strap to a ground connection point or unpainted metal in the product. Alternatively,

you can touch your finger repeatedly to a ground connection point or unpainted metal in the product. Before

removing a replacement part from its package, touch the anti

static bag to a ground connection point or

removing

replacement

part

from

its

package,

touch

the

anti

static

bag

ground

connection

point

unpainted metal in the product. Handle the electronic control assembly by its edges only. When

repackaging a failed electronic control assembly in an anti-static bag, observe these same precautions.

Regu

atory In

ormation

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to

Part 15 of the FCC Rules. These limits are desi

ned to

rovide reasonable

rotection a

ainst harmful

gp p g

interference when the equipment is operated in a residential installation. This equipment generates, uses,

and can radiate radio frequency energy, and, if not installed and used in accordance with the instruction

manual, July cause harmful interference to radio communications. However, there is no guarantee that

interference will not occur in a particular installation. If this equipment does cause harmful interference to

radio or television reception which can be determined by turning the equipment off and on the user is

radio

television

reception

which

can

determined

turning

the

equipment

off

and

the

user

encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate

the receiving antenna; Increase the separation between the equipment and the receiver; Connect the

equipment to an outlet on a different circuit than that to which the receiver is connected; or consult the

dealer or an experienced radio/TV technician for help.

July 2011 LCD TV 55LW56000

Customer Service (and Part Sales) (800) 243-0000

LG Contact Information

Technical Support (and Part Sales) (800) 847-7597

USA Website (GSFS) http://gsfs-america.lge.com

Customer Service Website htt

://www.us.l

service.com

Knowledgebase Website http://lgtechassist.com

LG Web Training https://lge.webex.com

New: 2010/11 Wireless Ready

Models Software Downloads

Presentations with Audio/Video and

Screen Notations

LG CS Learning Academy http://ln.lge.com/ilearn http://136.166.4.200

Training Manuals, Schematics with Navigational Bookmarks, Start-Up Sequence, Owner’s Guides,

Also available on the Plasma Page:

PDP Panel Alignment Handbook,

Pl C t l B d ROM U d t (Ji i d)

Interconnect Diagrams, Dimensions, Connector IDs, Product Pictures and Features.

Published July 2011 by LG Technical Support and Training

LG Electronics Alabama Inc

asma

oar

ROM

(Ji

g requ

July 2011 LCD TV 55LW56000

Electronics

Alabama

Inc

201 James Record Road, Huntsville, AL, 35813.

Safety and Handling Regulations

LCD Direct View Overview

1. Approximately 20 minute pre-run time is required before making any picture performance

adjustments from the Menu.

2. Refer to the Voltage/Current silk screening on the Switch Mode Power Supply.

MOS circuits are sensitive to static electricity.

MOS

circuits

are

sensitive

static

electricity.

Use caution when dealing with these IC and circuits.

4. Exercise care when making voltage and waveform checks to prevent costly short circuits

from damaging the unit.

cau

ous

f l

r m

objec

poss

rt in th

e cau ous o os sc e s a d o e e a objec s o p e e a poss b e s o e

circuitry.

Checking Points to be Considered

1. Check the appearance of the Replacement Panel and Circuit Boards for both physical

damage and part number accuracy.

Check the model label Verify model names and board model matches

Check

the

model

label

Verify

model

names

and

board

model

matches

3. Check details of defective condition and history. Example: Oscillator failure dead set, etc…

July 2011 LCD TV 55LW56000

Basic Troubleshooting Steps

Define, Localize, Isolate and Correct

•Define Look at the symptom carefully and determine what circuits could be causing

the failure. Use your senses Sight, Smell, Touch and Hearing. Look for burned parts and

check for possible overheated components. Capacitors will sometimes leak dielectric material

and give off a distinct odor Frequency of power supplies will change with the load or listen for

and

give

off

distinct

odor

Frequency

power

supplies

will

change

with

the

load

listen

for

relay closing etc. Observation of the front Power LED July give some clues.

•Localize After carefully checking the symptom and determining the circuits to be

checked and after giving a thorough examination using your senses the first check should

checked

and

after

giving

thorough

examination

using

your

senses

the

first

check

should

always be the DC Supply Voltages to those circuits under test. Always confirm the supplies

are not only the proper level but be sure they are noise free. If the supplies are missing check

the resistance for possible short circuits.

•Isolate To further isolate the failure, check for the proper waveforms with the

Oscilloscope to make a final determination of the failure. Look for correct Amplitude Phasing

and Timing of the signals also check for the proper Duty Cycle of the signals. Sometimes

“

glitches

”

“

road bumps

”

will be an indication of an imminent failure

glitches

road

bumps

will

indication

imminent

failure

•Correct The final step is to correct the problem. Be careful of ESD and make sure to

check the DC Supplies for proper levels. Make all necessary adjustments and lastly always

perform a Safety AC Leakage Test before returning the product back to the Customer

July 2011 LCD TV 55LW56000

perform

Safety

Leakage

Test

before

returning

the

product

back

the

Customer

This section of the manual will discuss the specifications of the

55LW56000 LCD

Di t Vi Di l

55LW56000 PRODUCT INFORMATION SECTION

55LW56000

LCD

rec

IS IT A TV? OR SOMETHING BETTER?

Welcome to the third dimension! The LW5600 delivers LG Cinema 3D technology and a whole lot more.

It lets you tap into the virtually limitless entertainment capabilities of LG Smart TV and enjoy better

picture quality with LG's LED Plus display technology

July 2011 LCD TV 55LW56000

picture

quality

with

LG's

LED

Plus

display

technology

Wireless Media Box (Sold Separately)

Wireless Media Box

The Wireless Media box communicates to the television via a wireless receiver called a

“Dongle”. The Dongle attaches to the Television via two connections:

1. HDMI Cable from the Dongle to the TV to transfer Audio and Video Signals.

Wired Remote cable between the TV and Dongle for Control Functions.

Media Box

Wired

Remote

cable

between

the

and

Dongle

for

Control

Functions.

Wired Remote to control the Media Box

Audio/Video is only sent

to the TV, not from the

TV to the Media Box.

Audio only to TV

(TV audio can not be heard via Optical Audio Out on Media Box).

Not 3D Ready

Wi l R i /T itt

TV A/V Inputs

the

Media

Box.

ess

ece

ver

ransm

itt

“Dongle”

Attaches via Velcro to

the back of the set

HDMI

July 2011 LCD TV 55LW56000

HDMI

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