LG 55LW5600 Operating instructions

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
th
, 2011

OUTLINE
Preliminar
y
Section:
y
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
,
Menu
Information
•
Switch Mode Power Supply with LED Backlight
Driver
Troubleshooting Section: Board Operation Troubleshooting of :
Disassembly
Section:
Removal
of
Circuit
Boards
•
Switch
Mode
Power
Supply
with
LED
Backlight
Driver
•Main Board
•
T
CON (TFT Panel Driver Board)
•Front IR/Intelligent/Soft Touch Key Board
•
T
-
CON
(TFT
Panel
Driver
Board)
•
Speaker
July 2011 LCD TV 55LW56000
2
•
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
s
S
ec
ti
on w
ill
ge
t
th
e
T
ec
h
n
i
c
i
an
f
am
ili
ar w
ith
th
e
Di
sassem
bl
y,
Id
en
tifi
ca
ti
on an
d
Layout of the LCD Display Panel.
fS f C
At the end o
f
this
S
ection the Technician should be able to Identi
f
y the
C
ircuit Boards
and have the ability and knowledge necessary to safely remove and replace any
Circuit Board or Assembly.
July 2011 LCD TV 55LW56000
3

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
.
If
wires
,
screws
,
clips
,
straps
,
nuts
,
or
washers
used
to
complete
a
ground
path
are
removed
for
service, they must be returned to their original positions and properly fastened.
CAUTION
CAUTION
To avoid personal injury, disconnect the power before servicing this product. If electrical power is required for
dia
g
nosis or test
p
ur
p
oses
,
disconnect the
p
ower immediatel
y
after
p
erformin
g
the necessar
y
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
4

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
a
replacement
part
from
its
package,
touch
the
anti
static
bag
to
a
ground
connection
point
or
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.
lf
Regu
l
atory In
f
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
g
ned to
p
rovide reasonable
p
rotection a
g
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
or
television
reception
,
which
can
be
determined
by
turning
the
equipment
off
and
on
,
the
user
is
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
5

Customer Service (and Part Sales) [phone]
LG Contact Information
Technical Support (and Part Sales) [phone]
USA Website (GSFS) http://gsfs-america.lge.com
Customer Service Website htt
p
://www.us.l
g
service.com
pg
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
Pl
asma
C
on
t
ro
l
B
oar
d
ROM
U
p
d
a
t
e
(Ji
g requ
i
re
d)
July 2011 LCD TV 55LW56000
6
LG
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.
3.
C
-
MOS circuits are sensitive to static electricity.
3.
C
MOS
circuits
are
sensitive
to
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.
5
.B
e
cau
ti
ous
o
f l
os
t
sc
r
e
w
s
a
n
d
o
th
e
r m
e
t
a
l
objec
t
s
t
o
p
r
e
v
e
nt
a
poss
i
b
l
e
s
h
o
rt in th
e
5
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.
2
Check the model label Verify model names and board model matches
2
.
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
7

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
a
distinct
odor
.
Frequency
of
power
supplies
will
change
with
the
load
,
or
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
a
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
”
or
“
road bumps
”
will be an indication of an imminent failure
glitches
or
road
bumps
will
be
an
indication
of
an
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
8
perform
a
Safety
AC
Leakage
Test
before
returning
the
product
back
to
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
Di
rec
t
Vi
ew
Di
sp
l
ay
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
9
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.
2.
Wired Remote cable between the TV and Dongle for Control Functions.
Media Box
2.
Wired
Remote
cable
between
the
TV
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
TV
to
the
Media
Box.
Wi
re
l
ess
R
ece
i
ver
/T
ransm
itt
er
“Dongle”
Attaches via Velcro to
the back of the set
HDMI
July 2011 LCD TV 55LW56000
10
HDMI

Wireless Network Adaptor (AN-WF100)
Wireless Network Adaptor Sold Separately
Using the LG Wireless LAN for Broadband Adaptor, which is sold separately, allows the TV
to connect to a wireless LAN network. The Wireless Network adaptor attaches to the
Television via either of the two USB connections:
Allows access to DLNA: Digital Living Network Alliance
AP (Wireless Router)
Any USB Port is OK.
Wireless Adaptor
Side A/V
Cat 5 Cable with
RJ 45 Connectors
“Dongle”
Side
A/V
Inputs
on each side
Note: If Software Update does not complete
using Wireless Dongle, use Wired (CAT-5)
Connection to the Router.
July 2011 LCD TV 55LW56000
11
Modem
Connection
to
the
Router.

Basic Specifications
Key TV Features
• LG Smart TV
1
•
LG
Smart
TV
1
• LG Cinema 3D2
• 2D to 3D Conversion
1 Internet connection & subscriptions required and sold
separately. The Magic Motion Remote does not come
equipped with all LG Smart TV enabled TVs and a
separate purchase maybe required. The Hulu Plus
service is projected to be available via a firmware
• LED Plus w/Local Dimming
• TruMotion 120Hz
•Wi
-
Fi® Ready (Adapter Included)
update in July 2011. The LG web browser does not
support Flash 10 or HTML 5, therefore, access to
certain web content July be limited or unavailable.
2 For a small percentage of the population, the viewing
of stereoscopic 3D video technology may cause
•
Wi
-
Fi®
Ready
(Adapter
Included)
• Magic Motion Remote (Included)
• Full HD 1080p Resolution
of
stereoscopic
3D
video
technology
may
cause
discomfort such as headaches, dizziness or nausea. If
you experience any symptoms, discontinue using the
3D functionality and contact your health care provider. 4
Pairs of 3D glasses are included.
• DLNA Certified
®
• ENERGY STAR® Qualified
•
Picture Wizard II
Picture
Wizard
II
• Intelligent Sensor
• Smart Energy Saving
ISF ® R d
July 2011 LCD TV 55LW56000
12
•
ISF
ccc
®
R
ea
d
y

Logo Familiarization Page 1 of 3
LG Cinema 3D
Want 3D like you get it in the movie theater? Lightweight glasses,
Want
3D
like
you
get
it
in
the
movie
theater?
Lightweight
glasses,
wider viewing angles and with clear 3D images? LG's Cinema 3D
experience can bring it right to your home. Enjoy amazing depth
along with smoother, crisper images, and a clear picture from
virtually any angle.
LED Plus
Want deeper blacks and richer colors? LG’s LED Plus technology
provides even greater control of brightness through local dimming
virtually
any
angle.
provides
even
greater
control
of
brightness
through
local
dimming
technology to deliver better contrast, amazing clarity and color
detail, as well as greater energy efficiency compared to
conventional LCD TVs.
LG SmartTV
A revolutionary, easy way to access virtually limitless content,
thousands of movies, customizable apps, videos and browse the
web all organized in a simple to use interface
web
all
organized
in
a
simple
to
use
interface
.
Magic Motion Remote (Included)
Just point and choose selections with LG's unique motion-controlled Magic
Remote
July 2011 LCD TV 55LW56000
13
Remote
.

Logo Familiarization Page 2 of 3
DLNA Certified®
To build a di
g
ital network
,
y
ou need di
g
ital devices. That’s
FULL HD RESOLUTION 1080P HD Resolution Pixels: 1920 (H) × 1080 (V)
g,yg
obvious. But unless those devices are compatible, it won’t be
much of a network. DLNA Certified® devices work together.
This stunning picture is the reason you wanted HDTV in the first place. With
almost double the pixel resolution, Full HD 1080p gives it superior picture
quality over standard HDTV. You’ll see details and colors like never before.
WiFi Ready:
WiFi
Ready:
Getting your LG TV connected to NetCast™ Entertainment Access and other
online content is easy when you are WiFi™ Ready. If you have existing
wireless broadband, setting it up is simple and you don't need to worry about
messy wires.
Intelligent Sensor
The Intelligent sensor will monitor the room lighting environment. When
the room lights go out, the TV will automatically adjust the picture for
the best viewing enjoyment.
Picture Wizard
Get easy self-calibration with on-screen reference points for key picture
quality elements such as black level, color, tint, sharpness and
backlight levels. Take the guesswork out of picture adjustments with
July 2011 LCD TV 55LW56000
14
this simple-to-use feature. It's not actually magic, but it will sure seem
that way.

Logo Familiarization Page 3 of 3
Clear Voice Clearer dialo
g
ue sound
g
Automatically enhances and amplifies the sound of the human voice
frequency range to provide high-quality dialogue when background
noise swells.
Save Energy Save Money
Save
Energy
,
Save
Money
Home electronic products use energy when they're off to power features like
clock displays and remote controls. Those that have earned the ENERGY STAR
use as much as 60% less energy to perform these functions, while providing the
same performance at the same price as less-efficient models. Less ener
gy
gy
means you pay less on your energy bill. Draws less than 1 Watt in stand by.
TruMotion 120Hz
See sports, video games and high-speed action with virtually no motion blur
and in crystal clarity with LG
’
s TruMotion 120Hz technology Now your TV
5M:1 Dynamic Contrast Ratio
Worrying about dark scenes is a thing of the past. The mega contrast
and
in
crystal
clarity
with
LG s
TruMotion
120Hz
technology
.
Now
your
TV
can keep up with the fastest moving scenes.
ratio of 5,000,000:1 delivers vivid colors and deep blacks.
AV Mode "One click" Cinema, THX Cinema, Sport, Game mode.
TAKE IT TO THE EDGE is a true multimedia TV with an AV Mode
which allows you to choose from 4 different modes of Cinema Sports
July 2011 LCD TV 55LW56000
15
which
allows
you
to
choose
from
4
different
modes
of
Cinema
,
Sports
and Game by a single click of a remote control.

TOP PORTION BOTTOM PORTION
p/n AKB72914041
55LW56000 Remote Control
July 2011 LCD TV 55LW56000
16
Parts List and Owner’s Manual list a p/n AKB72914043. It has the same buttons, but some may be in different locations.

TV Rear Input / Output Jacks
Rear In/Out Jacks
Sid I /O t
USB1 or USB2 for Software
Upgrades, Music, Videos and Photos.
A
lso for the Wireless Network ada
p
tor.
Rear
In/Out
Jacks
Sid
e
I
n
/O
u
t
p
USB 2
Wireless Media Box
Remote Jack
HDMI 4
USB 1
AV/Component
AV/Component
In
HDMI 3
HDMI
4
HDMI 1
Antenna
In
AV/Component
In
RS232
In
HDMI 2
RGBLAN
Optical
Head
RGB
July 2011 LCD TV 55LW56000
17
Optical
Out
Head
Phones
Audio

Software Updates (New and Changed Functions)
A wireless Internet Connection will work for Automatic Software Downloads, however if there are
problems completing download, a Wired Internet Connection is preferred
Scroll down to
highlight the
“?” mark
(
SUPPORT
)
.
Bring up the Customer’s Menu then
cursor down 2 times, (Input) will be
highlighted. Cursor right to highlight
(
SETUP
)
.
()
Cursor right to
highlight “Software
Update”, Press
“ENTER” on
Remote
()
Press “ENTER” on the Remote.
Remote
Hi
g
hli
g
ht “Check U
p
date Version”
gg p
to see if an update is available.
Scroll up to highlight “ON” and
cursor right to turn off automatic
Software U
p
date.
July 2011 LCD TV 55LW56000
18
p

1) Download the Software File.
Generic Plasma USB Automatic Software Download Instructions
Jump Drive Directory
2) Copy new software (xxx epk) to
"
LG DTV
"
Currently Installed Version
LG_DTV Sub-Directory
Software File
2)
Copy
new
software
(xxx
.
epk)
to
LG
_
DTV
folder. Make sure to have correct software file.
3) With TV turned on, insert USB flash drive.
4) The “TV Software Upgrade” screen appears.
(See figure to right)
Currently
Installed
Version
Software Version found on
the USB Flash Drive
File found on the USB
Fl h D i
(See
figure
to
right)
5) Cursor left and highlight "START" Button and
push “Enter” button using the remote control.
6) You can see the download progress Bar.
7) D t l til it h t ti ll
* CAUTION:
Do not remove AC power or
th USB Fl h D i D t
Fl
as
h
D
r
i
ve
7)
D
o no
t
unp
l
ug un
til
un
it
h
as au
t
oma
ti
ca
ll
y
restarted.
8) When download is completed, you will see
“COMPLETE”.
th
e
USB
Fl
as
h
D
r
i
ve.
D
o no
t
turn off Power, during the
upgrade process.
Highlight Start Press Select
July 2011 LCD TV 55LW56000
19
9) Your TV will be restarted automatically. Software Files are now available from
LGTechassist.com

Manual Software Download:
Prepare the Jump Drive as described in the “USB Automatic Download” section and insert it into either of the USB ports.
Bring up the Customer’s Menu then cursor down 2 times, (Input) will be highlighted. Cursor right to highlight (SETUP).
Press
“
ENTER
”
on the Remote
Press
ENTER
on
the
Remote
.
Scroll to “OPTIONS”, (Nothing should be highlighted on the right side).
Press the “FAV” key 7 times to bring up the first screen for
Manual Download Screen (Expert Mode).
Press the “FAV”
key 7 times
Location of
key
7
times
Location
of
files found
On the Jump
Drive
Highlight the Software update file
which
Scroll down and highlight
“
Options
”
File shown is not correct for this model.
Highlight
the
Software
update
file
which
will appear at the bottom of the screen.
(Scroll down if more than one file is on
the jump drive). Press “SELECT” to
begin the download process.
WARNING:
Use extreme Caution when using the Manual
“Forced” Download Menu. Any file can be
downloaded when selected and
July
cause the Main
Scroll
down
and
highlight
Options
July 2011 LCD TV 55LW56000
20
downloaded
when
selected
and
July
cause
the
Main
board to become inoperative if the incorrect file
was selected.