LG LT74 Series User manual

www.lg.com
OWNER’S MANUAL
LED LCD TV
Please read this manual carefully before operating your set and retain it
for future reference.
LT64**
LT65**
LT74**
LS34**
LS64**

ENG
ENGLISH
2TABLE OF CONTENTS
30 MAINTENANCE
30 Cleaning your TV
30 - Screen, frame, cabinet and stand
30 - Power cord
30 TROUBLESHOOTING
31 CAUTION FOR USING
EZSIGN 2.0
32 SPECIFICATIONS
35 IR CODES
36 EXTERNAL CONTROL
DEVICE SETUP
36 RS-232C Setup
36 Type of connector;
D-Sub 9-Pin Male
36 RS-232C Configurations
37 Communication Parameters
37 Command reference list
38 Transmission / Receiving Protocol
TABLE OF CONTENTS
3 LICENSES
3 OPEN SOURCE SOFTWARE
NOTICE
4 INSTALLATION PROCEDURE
4 ASSEMBLING AND
PREPARING
4 Unpacking
8 Separate purchase
9 Parts and buttons
11 Lifting and moving the TV
12 Setting up the TV
12 - Attaching the stand
15 - Mounting on a table
16 - Mounting on a wall
18 - Tidying cables
19 MAKING CONNECTIONS
20 Adapter connection
20 Antenna connection
20 HDMI connection
21 DVI to HDMI connection
22 Component connection
22 RGB-PC connection
23 Composite connection
23 Audio connection
23 - Digital optical audio connection
24 Speaker output setup
24 - Volume control port
24 External speaker out
25 Network Connection
25 - Connecting to a Wired Network
25 Headphone connection
25 USB connection
26 REMOTE CONTROL
WARNING
yIf you ignore the warning message, you may
be seriously injured or there is a possibility
of accident or death.
CAUTION
yIf you ignore the caution message, you may
be slightly injured or the product may be
damaged.
NOTE
yThe note helps you understand and use
the product safely. Please read the note
carefully before using the product.

3
LICENSES / OPEN SOURCE SOFTWARE NOTICE
ENGENGLISH
LICENSES
Supported licenses may differ by model. For more information about licenses, visit www.lg.com.
Manufactured under license from Dolby Laboratories. “Dolby” and the double-D symbol
are trademarks of Dolby Laboratories.
HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or
registered trademarks of HDMI Licensing LLC
.
ABOUT DIVX VIDEO: DivX® is a digital video format created by DivX, LLC, a subsidiary
of Rovi Corporation. This is an official DivX Certified® device that plays DivX video. Visit
divx.com for more information and software tools to convert your files into DivX video.
ABOUT DIVX VIDEO-ON-DEMAND: This DivX Certified® device must be registered
in order to play purchased DivX Video-on-Demand (VOD) movies. To obtain your
registration code, locate the DivX VOD section in your device setup menu. Go to vod.
divx.com for more information on how to complete your registration.
“DivX Certified® to play DivX® video up to HD 1080p, including premium content.”
“DivX®, DivX Certified® and associated logos are trademarks of Rovi Corporation or its
subsidiaries and are used under license.”
Covered by one or more of the following U.S. patents :
7,295,673; 7,460,668; 7,515,710; 7,519,274
OPEN SOURCE SOFTWARE NOTICE
To obtain the source code under GPL, LGPL, MPL and other open source licenses, that is contained in this
product, please visit http://opensource.lge.com.
In addition to the source code, all referred license terms, warranty disclaimers and copyright notices are
available for download.
LG Electronics will also provide open source code to you on CD-ROM for a charge covering the cost of
performing such distribution (such as the cost of media, shipping and handling) upon email request to
[email protected]. This offer is valid for three (3) years from the date on which you purchased the product.

4INSTALLATION PROCEDURE / ASSEMBLING AND PREPARING
ENG
ENGLISH
NOTE
yImage shown may differ from your TV.
yYour TV’s OSD (On Screen Display) may differ slightly from that shown in this manual.
yThe available menus and options may differ from the input source or product model that you are
using.
yNew features may be added to this TV in the future.
yThe TV can be placed in standby mode in order to reduce the power consumption. And the TV should
be turned off if it will not be watched for some time, as this will reduce energy consumption.
yThe energy consumed during use can be significantly reduced if the level of brightness of the picture
is reduced, and this will reduce the overall running cost.
INSTALLATION PROCEDURE
1 Open the package and make sure all the accessories are included.
2 Attach the stand to the TV set.
3 Connect an external device to the TV set.
ASSEMBLING AND PREPARING
Unpacking
Check your product box for the following items. If there are any missing accessories, contact the local
dealer where you purchased your product. The illustrations in this manual may differ from the actual product
and item.
CAUTION
yDo not use any unapproved items to ensure the safety and product life span.
yAny damages or injuries by using unapproved items are not covered by the manufacturer’s warranty.
ySome models have a thin film attached on to the screen and this must not be removed.
NOTE
yThe items supplied with your product may vary depending on the model.
yProduct specifications or contents of this manual may be changed without prior notice due to upgrade
of product functions.
yFor an optimal connection, HDMI cables and USB devices should have bezels less than 10 mm thick
and 18 mm width. Use an extension cable that supports USB 2.0 if the USB cable or USB memory
stick does not fit into your TV’s USB port.
B
AA
B
*A 10 mm
*B 18 mm

5
ASSEMBLING AND PREPARING
ENGENGLISH
Remote control,
Batteries (AAA)
(See p.26, 27,28, 29)
Owner’s manual
Cable holder
(Depending on model)
(See p.18)
Power cord
(Depending on model)
Stand Screws
8 EA, M4 x 12
(Only 26LT64**, 26LT65**)
(See p.12)
Stand Screws
8 EA, M4 x 14
(Only 32/37/42/47LT64**,
32/37/42/47LT65**,
32/37/42/47LT74**)
(See p.12)
Stand Screws
2EA, P4 x 16
4EA, M4 x 20
(Only 32LS34**)
(See p.13)
Stand Screws
4EA, P4 x 16
4EA, M4 x 14
(Only 42LS34**)
(See p.13)
Stand Screws
8 EA, M4 x 20
(Only 55LS64**)
(See p.14)
Desk-mount Screw
1 EA
(Only 32/37/42/47LT64**,
32/37/42/47LT65**,
32/37/42/47LT74**,
32/42LS34**)
(See p.15)
Wall mount Screws
4 EA, M6 x 51
(Only 47LT****)
DC Adapter
(Only 26LT64**, 26LT65**)
(See p.20)
Power Cord holder
(Only 32/37/42/47LT64**,
32/37/42/47LT65**,
32/37/42/47LT74**)
(See p.18)
Protection cover
(Only 32/37/42/47LT64**,
32/37/42/47LT65**,
32/37/42/47LT74**)
(See p.18)
Protection cover
(Only 32LS34**)
(See p.18)
Wall mount inner spacers
4EA
(Only 55LS64**)
(See p.17)
FREEZE
RATIO
L/R SELECT
ENTER
BACK EXIT
Q.MENU
INFO
MENU
CHVOL
P
A
G
E
FAV
3D
MUTE
1 2 3
4 5 6
7 8
0
9
MARK
LIST
FLASHBK
ENERGY
SAVING
TV
AVMODE
INPUT

6ASSEMBLING AND PREPARING
ENG
ENGLISH
Stand body / Stand base
(Only 26LT64**, 26LT65**)
(See p.12)
Stand body / Stand base
(Only 32/37/42/47LT64**,
32/37/42/47LT65**,
32/37/42/47LT74**)
(See p.12)
Stand body / Stand base
(Only 32LS34**)
(See p.13)
Stand body / Stand base
(Only 42LS34**)
(See p.13)
Stand body / Stand base
(Only 55LS64**)
(See p.14)
EzSign 2.0 Editor CD
(Only
26/32/37/42/47LT640E)
Isolator
(Depending on model)
(See p.7)
or

7
ASSEMBLING AND PREPARING
ENGENGLISH
NOTE
yAntenna Isolator Installation Guide
- Use this to install TV in a place where there is a voltage difference between TV Set and GND of
antenna signal.
»If there is a voltage difference between TV Set and GND of antenna signal, the antenna contact
might be heated and excessive heat might cause an accident.
- You can improve the safety when watching TV by efficiently removing power voltage from TV
antenna. It is recommended to mount the isolator to the wall. If it cannot be mounted to the wall,
mount it on the TV. Avoid disconnecting the antenna Isolator after installation.
- Before starting, be sure that the TV antenna is connected.
ANTENNA/
CABLE IN
Cable / Antenna
Wall
Isolator
1. Connect to TV.
2. Connect to Set-Top box.
or
Connect one end of the isolator to cable/antenna jack and the other to TV set or set-top box.
“Equipment connected to the protective earthing of the building installation through the mains
connection or through other equipment with a connection to protective earthing - and to a cable
distribution system using coaxial cable, may in some circumstances create a re hazard. Connection
to a cable distribution system has therefore to be provided through a device providing electrical
isolation below a certain frequency range (galvanic isolator, see EN 60728-11)”
When applying the RF Isolator, a slight loss of signal sensitivity can occur.

8ASSEMBLING AND PREPARING
ENG
ENGLISH
CAUTION
yPower Cord Installation Guide
- If the power cord provided with TV looks like the below picture, please ensure that it is inserted in
the right direction.
Power Cord Correct Wrong
TV
Separate purchase
Separate purchase items can be changed or modified for quality improvement without any notification.
Contact your dealer to buying these items.
These devices only work with certain models.
AN-WF100
Wireless Dongle
(Only 26/32/37/42/47LT640E)
Compatibility LT640E LT640H, LT650H,
LT740H, LS345H, LS645H
AN-WF100
Wireless Dongle •

9
ASSEMBLING AND PREPARING
ENGENGLISH
Parts and buttons
Button Description
∨∧
Scrolls through the saved programmes.
- +
Adjusts the volume level.
Turns the power on or off.
OPTICAL
DIGITAL
AUDIO OUT
AUDIO IN
RS-232C IN
(CONTROL & SERVICE)
RGB IN (PC)
2 1
AUDIO IN
(RGB/DVI)
RS-232C IN
(CONTROL & SERVICE)
ANTENNA /
IN
RGB IN (PC)
12
VOLUME
CONTROL
STEREO
(8 )
SPEAKER
OUT
VIDEO AUDIO
VIDEO
AV IN
L/MONO AUDIO
R
DC IN
OPTICAL
DIGITAL
AUDIO OUT
AUDIO IN
(RGB/DVI)
RS-232C IN
(CONTROL & SERVICE)
RGB IN (PC)
12
VOLUME
CONTROL
STEREO
(8 )
SPEAKER
OUT
ANTENNA /
IN
VIDEO AUDIO
VIDEO
AV IN
L/MONO AUDIO
R
USB IN
IN 3
R
Speakers
Power Indicator
(Can be adjusted using
the Power Indicator in the
OPTION -menu.)
Remote control sensor
Clock LED
Screen
(Only LT64**, LT74**)
Buttons
(Only LT64**, LT65**, LT74**)

10 ASSEMBLING AND PREPARING
ENG
ENGLISH
A type B type
Description
Button Touch button
∧∨ ∨∧
Scrolls through the saved programmes.
+ - - +
Adjusts the volume level.
H
OK Selects the highlighted menu option or confirms an input.
SSETTINGS Accesses the main menu, or saves your input and exits the menus.
H
INPUT Changes the input source.
/ ITurns the power on or off.
1 B type buttons are touch sensitive and can be operated through simple touch with your nger.
Power Indicator
(Can be adjusted
using the Power
Indicator in the
OPTION menu.)
Remote control
OK SETTINGS INPUT
Touch buttton1
OK
INPUT
SETTINGS
SETTINGS
INPUT
OK
Button
Speakers
Power indicator
Remote control
Screen Screen
Speakers
(A type : Only 32/42LS34**)(B type : Only 55LS64**)

11
ASSEMBLING AND PREPARING
ENGENGLISH
Power Indicator
(Can be adjusted
using the Power
Indicator in the
OPTION menu.)
yIt is recommended to move the TV in the box
or packing material that the TV originally came
in.
yBefore moving or lifting the TV, disconnect the
power cord and all cables.
yWhen holding the TV, the screen should face
away from you to avoid damage.
yHold the top and bottom of the TV frame rmly.
Make sure not to hold the transparent part,
speaker, or speaker grill area.
yWhen transporting a large TV, there should be
at least 2 people.
yWhen transporting the TV by hand, hold the TV
as shown in the following illustration.
yWhen transporting the TV, do not expose the
TV to jolts or excessive vibration.
yWhen transporting the TV, keep the TV upright,
never turn the TV on its side or tilt towards the
left or right.
CAUTION
yAvoid touching the screen at all times, as this
may result in damage to the screen.
Lifting and moving the TV
When moving or lifting the TV, read the following to
prevent the TV from being scratched or damaged
and for safe transportation regardless of its type
and size.

12 ASSEMBLING AND PREPARING
ENG
ENGLISH
Setting up the TV
Put your TV on a pedestal stand and mount the TV on a table or wall.
Attaching the stand
(Only 26LT64**, 26LT65**)
1
Front
Stand Body
Stand Base
M4X20
Top View
M4 x 12
4 EA
2
3
M4 x 12
4 EA
(Only 32/37/42/47LT64**, 32/37/42/47LT65**,
32/37/42/47LT74**)
1
3
2
M4 x 14
4 EA
Front
Stand Body
Stand Base
4 EA
M4 x 14
M4X20
Top View

13
ASSEMBLING AND PREPARING
ENGENGLISH
M4 x 20
4EA
(Only 32LS34**)
1
2
3
M4 x 14
4EA
(Only 42LS34**)
P4 x 16
4EA
1
2
3
Stand Base
Top View
Stand Base
Stand Body
Top View
Stand Body
P4 x 16
2EA

14 ASSEMBLING AND PREPARING
ENG
ENGLISH
CAUTION
yWhen attaching the stand to the TV
set, place the screen facing down on a
cushioned table or at surface to protect the
screen from scratches.
yMake sure that the screws are inserted
correctly and fastened securely. If they are
not fastened securely enough, the TV may
tilt forward after being installed.
Do not use too much force and over tighten
the screws; otherwise screw may be
damaged and not tighten correctly.
NOTE
yRemove the stand before installing the TV
on a wall mount by performing the stand
attachment in reverse.
(Only 55LS64**)
M4 x 20
4EA
Top View
Stand Base
Stand Body
Front
1
2
3
M4 x 20
4EA

15
ASSEMBLING AND PREPARING
ENGENGLISH
Mounting on a table
1 Lift and tilt the TV into its upright position on a
table.
- Leave a 10 cm (minimum) space from the
wall for proper ventilation.
2 Connect the power cord to a wall outlet.
Securing the TV to a table
(Only 32/37/42/47LT64**, 32/37/42/47LT65**,
32/37/42/47LT74**, 32/42LS34**)
Fix the TV to a table to prevent from tilting forward,
damage, and potential injury.
Mount the TV on a table, and then insert and
tighten the supplied screw on the rear of the stand.
Adjusting the angle of the TV to suit view
Swivel 90 degrees to the left or right and adjust the
angle of the TV to suit your view.
10 cm
10 cm
10 cm
10 cm
CAUTION
yDo not place the TV near or on sources
of heat, as this may result in re or other
damage.
WARNING
yTo prevent TV from falling over, the TV
should be securely attached to the floor/
wall per installation instructions. Tipping,
shaking, or rocking the TV may cause injury.
90
90
CAUTION
yWhen adjusting the angle of the product,
watch out for your ngers.
»Personal injury may occur if hands or
fingers are pinched. If the product is tilted
too much, it may fall, causing damage or
injury.
Attaching the TV to a table
Image shown may differ from your TV.
The TV must be attached to desk so it cannot be
pulled in a forward/backward direction, potentially
causing injury or damaging the product.
(Only 32/37/42/47LT64**, 32/37/42/47LT65**,
32/37/42/47LT74**)
Screws: M5 x L (*L: Table depth + 8-10 mm)
ex) Table depth: 15 mm, Screw: M5 x 25
(not provided as parts of the product)
4-Screws
Stand
Table
(Only LT64**, LT65**, LT74**)
(Only LS64**)

16 ASSEMBLING AND PREPARING
ENG
ENGLISH
Securing the TV to a wall
(This feature is not available for all models.)
1 Insert and tighten the eye-bolts, or TV brackets
and bolts on the back of the TV.
- If there are bolts inserted at the eye-bolts
position, remove the bolts first.
2 Mount the wall brackets with the bolts to the
wall.
Match the location of the wall bracket and the
eye-bolts on the rear of the TV.
3 Connect the eye-bolts and wall brackets tightly
with a sturdy rope.
Make sure to keep the rope horizontal with the
at surface.
CAUTION
yMake sure that children do not climb on or
hang on the TV.
NOTE
yUse a platform or cabinet that is strong and
large enough to support the TV securely.
yBrackets, bolts and ropes are not provided.
You can obtain additional accessories from
your local dealer.
Mounting on a wall
Attach an optional wall mount bracket at the rear of
the TV carefully and install the wall mount bracket
on a solid wall perpendicular to the floor. When you
attach the TV to other building materials, please
contact qualified personnel.
LG recommends that wall mounting be performed
by a qualified professional installer.
10 cm
10 cm
10 cm
10 cm
10 cm

17
ASSEMBLING AND PREPARING
ENGENGLISH
CAUTION
yDisconnect the power first, and then move
or install the TV. Otherwise electric shock
may occur.
yIf you install the TV on a ceiling or slanted
wall, it may fall and result in severe injury.
Use an authorized LG wall mount bracket
and contact the local dealer or qualified
personnel.
yDo not over tighten the screws as this may
cause damage to the TV and void your
warranty.
yUse the screws and wall mount bracket
that meet the VESA standard. Any
damages or injuries by misuse or using an
improper accessory are not covered by the
manufacturer's warranty.
yOn the 47LT**** models, use M6 x 51
screws.
NOTE
yUse the screws that are listed on the VESA
standard screw specifications.
yThe wall mount kit includes an installation
manual and necessary parts.
yThe wall mount bracket is not provided. You
can obtain additional accessories from your
local dealer.
yThe length of screws may differ depending
on the wall mount. Make sure to use the
proper length.
yFor more information, refer to the manual
supplied with the wall mount.
yWhen attaching a third-party wall mounting
bracket to the TV, insert the wall mount
inner spacers into the TV wall mount holes
to move your TV in vertical angle. Please
make sure not to use the spacers for LG
wall mounting bracket. (Only 55LS64**)
A
B
Make sure to use screws and wall mount
bracket that meet the VESA standard. Standard
dimensions for the wall mount kits are described in
the following table.
Separate purchase (Wall Mounting Bracket)
Model 26LT64**,
26LT65**
32LT64**,
32LT65**,
32LT74**,
32LS34**
VESA 100 x 100 200 x 100
Standard screw M4 M4
Number of screws 4 4
Wall mount
bracket
LSW100B(G)
Model 37/42LT64**,
37/42LT65**,
37/42LT74**
42LS34**
VESA 200 x 200
Standard screw M6
Number of screws 4
Wall mount
bracket
LSW200B(G) LSW220BX
Model 47LT64**,
47LT65**,
47LT74**
55LS64**
VESA 400 x 400
Standard screw M6
Number of screws 4
Wall mount
bracket
LSW420BX
Wall Mount Inner Spacer

18 ASSEMBLING AND PREPARING
ENG
ENGLISH
Not using the DESK-TYPE STAND
(Only 32/37/42/47LT64**, 32/37/42/47LT65**,
32/37/42/47LT74**)
Image shown may differ from your TV.
When installing the wall-mounted unit, use the
protection cover.
Insert the Protection cover into the TV until
clicking sound.
Protection Cover
Tidying cables
(Only 32/37/42/47LT64**, 32/37/42/47LT65**,
32/37/42/47LT74**)
(Only 26LT64**, 26LT65**, 55LS64**)
1 Gather and bind the cables with the cable
holder.
1 Install the Power Cord Holder and Power Cord.
It will help prevent the power cable from being
removed by accident.
2 Gather and bind the cables with the cable
holder.
Cable Holder
Power Cord Holder
Cable Holder
NOTE
yWhen removing Protection Cover from bottom
of TV insert your fingers into hole of cover
hold firmly and pull upwards towards you to
remove. (Only 32LS34**)
Protection cover
Protection cover
(Only 32LS34**)
When installing the wall mounting bracket, use the
Protection cover. This will protect the opening from
accumulating dust and dirt.
yPush the supplied protection cover into the
opening at the bottom of the TV until it locks
in place.

19
ASSEMBLING AND PREPARING/MAKING CONNECTIONS
ENGENGLISH
MAKING
CONNECTIONS
This section on MAKING CONNECTIONS mainly
uses diagrams for the 32LT64** models.
Connect various external devices to the TV
and switch input modes to select an external
device. For more information on external device’s
connection, refer to the manual provided with each
device.
Available external devices are: HD receivers,
DVD players, VCRs, audio systems, USB storage
devices, PC, gaming devices, and other external
devices.
NOTE
yThe external device connection may differ
from the model.
yConnect external devices to the TV
regardless of the order of the TV port.
yIf you record a TV program on a DVD
recorder or VCR, make sure to connect the
TV signal input cable to the TV through a
DVD recorder or VCR. For more information
on recording, refer to the manual provided
with the connected device.
yRefer to the external equipment’s manual for
operating instructions.
yIf you connect a gaming device to the TV,
use the cable supplied with the gaming
device.
yIn PC mode, there may be noise associated
with the resolution, vertical pattern, contrast
or brightness. If noise is present, change
the PC output to another resolution, change
the refresh rate to another rate or adjust the
brightness and contrast on the PICTURE
menu until the picture is clear.
yIn PC mode, some resolution settings may
not work properly depending on the graphics
card.
CAUTION
yDo not move the TV by holding the Cable
Holder and Power Cord Holder, as the Cable
holders may break, and injuries and damage
to the TV may occur.
Cable Holder
(Only 32/42LS34**)
1 Gather and bind the cables with the Cable
Holder on the TV back cover.

20 MAKING CONNECTIONS
ENG
ENGLISH
Adapter connection
DC IN
DC Adapter
1 Connect the antenna cable to the antenna
input port on the TV.
2 Connect the DC adapter plug to the power
input jack on the TV.
3 Connect the power cord to the DC adapter rst,
then plug the power cord into the wall power
outlet.
(Only 26LT64**, 26LT65**)
Antenna connection
Connect the TV to a wall antenna socket with an
RF cable (75 Ω).
NOTE
yUse a signal splitter to use more than 2 TVs.
yIf the image quality is poor, install a signal
amplifier properly to improve the image
quality.
yIf the image quality is poor with an antenna
connected, try to realign the antenna in the
correct direction.
yAn antenna cable and converter are not
supplied.
ANTENNA
IN
A
NTENNA / CABLE
IN
ANTENNA /
IN
CABLE
HDMI connection
Transmits the digital video and audio signals from
your PC to the TV. Connect the PC and the TV
with the HDMI cable as shown. Choose any HDMI
input port to connect. It does not matter which port
you use.
NOTE
yIt is recommended to use the TV with the
HDMI connection for the best image quality.
yUse the latest High Speed HDMI™ Cable
with CEC (Customer Electronics Control)
function.
yHigh Speed HDMI™ Cables are tested to
carry an HD signal up to 1080p and higher.
ySupported DTV Audio: MPEG, Dolby Digital,
Dolby Digital Plus, HE-AAC
ySupported HDMI Audio format : Dolby
Digital, PCM (Up to 192 KHz, 32k/44.1k/48k
/88k/96k/176k/192k, DTS Not supported.)
HDMI
1
2
3
3
(*Not Provided)
DVD/ Blu-Ray /
HD Cable Box /
HD STB / PC
(Only LT64**,
LT65**, LS34**,
LS64**)