LG Flatron L1720P User manual

Make sure to read the Important Precautions before using the product.
Keep the User's Guide(CD) in an accessible place for furture reference.
See the label attached on the back cover and quote this information to your
dealer when you require service.
L1720P
User’s Guide

A1
This unit has been engineered and manufactured to ensure your personal
safety, however improper use may result in potential e shock or fire hazards.
In order to allow the proper operation of all safeguards incorporated in this
display, observe the following basic rules for its installation, use, and
servicing.
On Safety
Use only the power cord supplied with the unit. In case you use another power
cord, make sure that it is certified by the applicable national standards if not being
provided by the supplier. If the power cable is faulty in any way, please contact the
manufacturer or the nearest authorized repair service provider for a replacement.
The power supply cord is used as the main disconnection device. Ensure that the
socket-outlet is easily accessible after installation.
Operate the display only from a power source indicated in the specifications of
this manual or listed on the display. If you are not sure what type of power supply
you have in your home, consult with your dealer.
Overloaded AC outlets and extension cords are dangerous. So are frayed power
cords and broken plugs. They may result in a shock or fire hazard. Call your service
technician for replacement.
Do not Open the Display.
There are no user serviceable components inside.
There are Dangerous High Voltages inside, even when the power is OFF.
Contact your dealer if the display is not operating properly.
To Avoid Personal Injury :
Do not place the display on a sloping shelf unless properly secured.
Use only a stand recommended by the manufacturer.
To Prevent Fire or Hazards:
Always turn the display OFF if you leave the room for more than a short period
of time. Never leave the display ON when leaving the house.
Keep children from dropping or pushing objects into the display's cabinet
openings. Some internal parts carry hazardous voltages.
Do not add accessories that have not been designed for this display.
During a lightning storm or when the display is to be left unattended for an
extended period of time, unplug it from the wall outlet.
Important Precautions

A2
Important Precautions
On Installation
Do not allow anything to rest upon or roll over the power cord, and do not place
the display where the power cord is subject to damage.
Do not use this display near water such as near a bathtub, washbowl, kitchen
sink, laundry tub, in a wet basement, or near a swimming pool.
Displays are provided with ventilation openings in the cabinet to allow the release
of heat generated during operation. If these openings are blocked, built-up heat
can cause failures which may result in a fire hazard. Therefore, NEVER:
Block the bottom ventilation slots by placing the display on a bed, sofa, rug, etc.
Place the display in a built-in enclosure unless proper ventilation is provided.
Cover the openings with cloth or other material.
Place the display near or over a radiator or heat source.
Do not rub or strike the Active Matrix LCD with anything hard as this may scratch,
mar, or damage the Active Matrix LCD permanently.
Do not press the LCD screen with your finger for a long time as this may cause
some afterimages.
Some dot defects may appear as Red, Green or Blue spots on the screen.
However, this will have no impact or effect on the display performance.
If possible, use the recommended resolution to obtain the best image quality for
your LCD display. If used under any mode except the recommended resolution,
some scaled or processed images may appear on the screen. However, this is
characteristic of the fixed-resolution LCD panel.
On Cleaning
Unplug the display before cleaning the face of the display screen.
Use a slightly damp (not wet) cloth. Do not use an aerosol directly on the display
screen because over-spraying may cause electrical shock.
On Repacking
Do not throw away the carton and packing materials. They make an ideal
container in which to transport the unit. When shipping the unit to another
location, repack it in its original material.

A3
Connecting the Display
Before setting up the monitor, ensure that the power to the monitor, the
computer system, and other attached devices is turned off.
Unfolding the stand base
This illustration depicts the general model of connection.
Your monitor may differ from the items shown in the picture.
Do not touch or apply force to the monitor screen while expanding or
folding the stand base.
folding the stand base
1.Face the front of the monitor and push it backwards, following the sequence
shown in the picture.
4. Place the monitor upright and adjust the stand base
angle as desired. Adjust the stand base angle holding the
monitor head part with both hands.
Do not push it over 180 degrees. It may damage the stand base.
1. Place the monitor with its front facing downward on a cushion or soft cloth.
2. Expand the stand base to its first step degree (65˚) pulling it outward with two hands.
3. Further expand the stand base to 90 degrees with slightly more force. Do not apply
excessive force to expand the stand base to over 90 degrees, or it may damage the
monitor.

A4
Connecting the Display
Using the Computer
1. Separate the back cap by sliding its lower
section downward as shown in the picture.
3. After the cables are connected, set
the back cap into the groove of
the upper section and reassemble by
pushing upward.
4. Insert the back cap along the bottom
grooves on both sides, holding the bottom.
2. Connect the signal input cable and the power cord. (see next page)

A5
Connecting the Display
Using the Computer
1. Connect the signal cable. When attached, tighten the thumbscrews to secure
the connection.
2. Connect the power cord into a proper power outlet that is easily accessible and
close to the display.
Mac adapter
For Apple Macintosh use, a separate plug adapter is
needed to change the 15 pin high density (3 row)
D-sub VGA connector on the supplied cable to a
15 pin 2 row connector.
PC
MAC
Wall-outlet type*
PC-outlet type*
Power Cord Signal Cable
Analog signal
2
1
Digital signal
3. Press button on the front switch panel to turn the
power on. When monitor power is turned on, the 'Self
Image Setting Function' is executed automatically.
NOTE
Self Image Setting Function’? This function provides the user with optimal display settings.When the user
connects the monitor for the first time, this function automatically adjusts the display to optimal settings for
individual input signals. If you want to adjust the monitor while in use, or wish to manually run this function once
again, push the ‘AUTO’ button on the front panel of the monitor. Otherwise, you may execute the ‘ Factory reset’
option on the OSD adjustment menu. However, be aware that this option initializes all the menu items except
‘Language’.
NOTE
This is a simplified representation of the rear view.
This rear view represents a general model; your display may differ from the view as shown.

A6A6
Control Panel Functions
Front Panel Controls
Buttons
Use these buttons to choose or adjust items in
the On Screen Display.
MENU Button
Use this button to enter or exit the On Screen
Display.
Use this button to turn the display on or off.
This Indicator lights up blue when the display
operates normally. If the display is in DPM (Energy
Saving) mode, this indicator color changes to amber.
Power Button
Power (DPMS)
Indicator
Use this button to enter a selection in the On Screen
Display.
AUTO/SELECT
Button
Control Function

A7
Control Panel Functions
Control Direct Access Function
When adjusting your display settings, always press the
AUTO/SELECT button before entering the On Screen
Display(OSD). This will automatically adjust your display image
to the ideal settings for the current screen resolution size
(display mode).The best display mode is 1280x1024
AUTO IMAGE ADJUSTMENT
This function allows you to secure the current control settings,
so that they cannot be inadvertently changed. Press and hold
the MENU button and button for 3 seconds: the message
“CONTROLS LOCKED”appears.
You can unlock the OSD controls at any time by pushing the
MENU button and button for 3 seconds:
the message “CONTROLS UNLOCKED”will appear.
CONTROLS LOCKED/UNLOCKED
:
MENU and
100
100
Bring up Contrast and Brightness adjustment.
:
This feature lets you easily select the best desired image
condition optimized to the environment (ambient illumination,
image types etc.).
• DAY : Bright ambient illumination
• NIGHT : Dark ambient illumination
• TEXT : For text images (Word processing etc.)
• MOVIE : For animation images in videos or movies
• PHOTO : For pictures or drawings
• USER MODE : For use under user setup image conditions
(Brightness, contrast and color tint are selected by the user
in OSD Screen Setup Menu.)
Use this button to make Dsub or DVI connector active. This
feature is used when two computers are connected to the
display. The default setting is Dsub.
Check to see if the OSD screen is turned off before using the
SOURCE function.
SOURCE

A8
On Screen Display (OSD) Control Adjustment
Screen Adjustment
Making adjustments to the image size, position and operating parameters of
the display is quick and easy with the On Screen Display Control system. A
short example is given below to familiarize you with the use of the controls.
The following section is an outline of the available adjustments and selections
you can make using the OSD.
To make adjustments in the On Screen Display, follow these steps:
Press the MENU Button, then the main menu of the OSD appears.
To access a control, use the or Buttons. When the icon you want
becomes highlighted, press the AUTO/ SELECT Button.
Use the Buttons to adjust the item to the desired level.
Accept the changes by pressing the AUTO/ SELECT Button.
Exit the OSD by Pressing the MENU Button.
NOTE
Allow the display to stabilize for at least 30 minutes before making image adjustments.

A9
NOTE
The order of icons may differ depending on the model (A9~A11).
On Screen Display(OSD) Selection and Adjustment
The following table indicates all the On Screen Display control, adjustment,
and setting menus.
To adjust the brightness and
contrast of the screen
BRIGHTNESS
CONTRAST
COLOR
POSITION
TRACKING
SETUP
Main menu Sub menu A D Reference
PRESET 9300K
6500K
R/G/B(User Color)
GAMMA
To adjust the position of the
screen
To customize the color of the
screen
To customize the screen status
for a user's operating environment
To improve the clarity and
stability of the screen
: Adjustable
A : Analog Input
D : Digital Input
BRIGHTNESS
CONTRAST
V POSITION
H POSITION
CLOCK
PHASE
LANGUAGE
OSD POSITION
SIGNAL
FACTORY RESET
WHITE BALANCE

A10
On Screen Display(OSD) Selection and Adjustment
You were introduced to the procedure of selecting and adjusting an item
using the OSD system. Listed below are the icons, icon names, and icon
descriptions of the all items shown on the Menu.
OSD Adjust Description
BRIGHTNESS
To adjust the brightness of the screen.
CONTRAST
To adjust the contrast of the screen.
Vertical Position
To move image up and down.
Horizontal Position
To move image left and right.
To adjust the brightness and contrast of the screen
To adjust the position of the screen
OSD Adjust Description
PRESET
RED
GREEN
BLUE
GAMMA
9300K/6500K
Select the screen color.
• 9300K: Slightly bluish white.
• 6500K: Slightly reddish white.
Set your own color levels.
Set your own gamma value.(-30~30)
On the monitor, high gamma values
display whitish images and low gamma
values display high contrast images.
To customize the color of the screen
OSD Adjust Description
NOTE
OSD (On Screen Display) menu languages on the monitor may differ from the manual.

To choose the language in which the
control names are displayed.
To adjust position of the OSD window
on the screen.
To select DSUB ANALOG, DVI
DIGITAL as the active input. This
feature is used when two computers
are connected to the display. The
display automatically detects the
proper input when only one video
source is connected.
Return to all factory default settings
except "LANGUAGE". If you don’t want
to reset the monitor, use the
button to select NO and then press the
AUTO/SELECT button.
A11
On Screen Display(OSD) Selection and Adjustment
To improve the clarity and stability of the screen
OSD Adjust Description
To minimize any vertical bars or
stripes visible on the screen
background.The horizontal screen
size will also change.
To adjust the focus of the display.
This item allows you to remove any
horizontal noise and clear or sharpen
the image of characters.
CLOCK
PHASE
To customize the screen status for a user's operating environment
OSD Adjust Description
LANGUAGE
OSD POSITION
SIGNAL
FACTORY
RESET
WHITE
BALANCE
If the output of the video card is different
the required specifications, the color
level may deteriorate due to video
signal distortion. Using this function, the
signal level is adjusted to fit into the
standard output level of the video card
in order to provide the optimal image.
Activate this function when white and
black colors are present in the screen.
For example
If this does not improve the screen image, restore the factory default settings. If
necessary, perform the white balance function again. This function will be enabled
only when the input signal is an analog signal.

A12
Troubleshooting
No image appears
Check the following before calling for service.
No image appears
Is the power cord of the
display connected?
Is the power indicator
light on?
Is the power on and the
power indicator blue?
Is the power indicator
amber?
Do you see an "INPUT
SIGNAL OUT OF
RANGE" message on
the screen?
Do you see a "NO
SIGNAL "message on
the screen?
Do you see a "CONTROLS LOCKED" message on the screen?
Check and see if the power cord is connected
properly to the power outlet.
Press the Power button.
Adjust the brightness and the contrast.
If the display is in power saving mode, try moving
the mouse or pressing any key on the keyboard
to bring up the screen.
Make sure if the power is on.
Try to turn on the PC.
This message appears when the signal from the
PC (video card) is out of horizontal or vertical
frequency range of the display. See the
'Specifications' section of this manual and
configure your display again.
This message appears when the signal cable
between your PC and your display is not
connected. Check the signal cable and try again.
You can secure the current control settings,
so that they cannot be inadvertently
changed. You can unlock the OSD controls
at any time by pushing the MENU button
and button for 3 seconds: the message
“CONTROLS UNLOCKED”will appear.
Do you see
“CONTROLS LOCKED”
when you push MENU
button?

A13
Troubleshooting
Display image is incorrect
Display Position is
incorrect.
On the screen
background, vertical
bars or stripes are
visible.
Any horizontal noise
appearing in any
image or characters
are not clearly
portrayed.
The screen color is
mono or abnormal.
The screen blinks.
Press the AUTO/SELECT button to automatically
adjust your display image to the ideal setting.
If the results are unsatisfactory, adjust the image
position using the H position and V position icon
in the on screen display.
Check Control Panel --> Display --> Settings and
see if the frequency or the resolution were changed.
If yes, readjust the video card to the recommend
resolution.
Press the AUTO/SELECT button to automatically
adjust your display image to the ideal setting.
If the results are unsatisfactory, decrease the
vertical bars or stripes using the CLOCK icon in the
on screen display.
Press the AUTO/SELECT button to automatically
adjust your display image to the ideal setting.
If the results are unsatisfactory, decrease the
horizontal bars using the PHASE icon in the on
screen display.
Check Control Panel --> Display --> Settings and
adjust the display to the recommended resolution or
adjust the display image to the ideal setting. Set the
color setting higher than 24 bits (true color).
Check if the signal cable is properly connected and
use a screwdriver to fasten if necessary.
Make sure the video card is properly inserted in the
slot.
Set the color setting higher than 24 bits (true color)
at Control Panel - Settings.
Check if the screen is set to interlace mode and if
yes, change it to the recommend resolution.
Make sure the power voltage is high enough, It has
to be higher than AC100-240V 50/60Hz.

A14
Troubleshooting
Have you installed the display driver?
Have you installed the
display driver?
Do you see an
"Unrecognized monitor,
Plug&Play (VESA DDC)
monitor found"
message?
Be sure to install the display driver from the
display driver CD (or diskette) that comes with
your display. Or, you can also download the
driver from our web site: http://www.lge.com.
Make sure to check if the video card supports
Plug&Play function.
USB function
Check if the USB cable is correctly connected.
Check if the PC and OS are USB compliant.
For verification of USB support, consult the
manufacturer of each system.
USB function cannot be
setup.

A15
Specifications
NOTE
Information in this document is subject to change without notice.
17 inches (43.2cm) Flat Panel Active matrix-TFT LCD
Anti-Glare coating
17 inches viewable
0.26 mm pixel pitch
Horizontal Freq. 30 - 83kHz (Automatic)
Vertical Freq. 56 - 75Hz (Automatic)
Input Form Separate TTL, Positive/Negative
Composite TTL Positive/Negative
SOG (Sync On Green)
Digital
Signal Input 15 pin D-Sub Connector
DVI-D connector (Digital)
Input Form RGB Analog (0.7Vp-p/75ohm), Digital
Max DVI Digital: VESA 1280 x 1024@60Hz
D-sub Analog: VESA 1280 x 1024@75Hz
Recommend VESA 1280 x 1024@60Hz
DDC 2B
Normal :
43W
Stand-by/Suspend ≤2W
DPMS Off ≤2W
Full Up Position Folded Position
Width 39.40cm /15.51inches 39.40cm /15.51inches
Height 37.90cm /14.92inches 41.20cm /16.22inches
Depth 23.20cm / 9.13 inches 12.70 cm / 5.00inches
Net 4.5 kg (9.92 lbs)
Tilt 0˚~25˚
AC 100-240V~ 50/60Hz 1.0A
Operating Conditions
Temperature 10˚C to 35 ˚C
Humidity 10 % to 80 % non-Condensing
Storage Conditions
Temperature -20˚C to 60 ˚C
Humidity 5 % to 95 % non-Condensing
Attached( O ), Detached ( )
Attached( ), Detached ( O )
Wall-outlet type or PC-outlet type
Display
Sync Input
Video Input
Resolution
Plug&Play
Power
Consumption
Dimensions
&Weight
(with tilt stand)
Tilt Range
Power Input
Environmental
Conditions
Tilt Stand
Signal cable
Power cord

A16
Specifications
Preset Modes (Resolution)
Display Modes (Resolution) Horizontal Freq. (kHz) Vertical Freq. (Hz)
1
2
3
4
5
6
7
8
9
10
11
12
13
640 x 350
720 x 400
640 x 480
640 x 480
800 x 600
800 x 600
832 x 624
1024 x 768
1024 x 768
1152 x 870
1152 x 900
1280 x 1024
1280 x 1024
31.469
31.468
31.469
37.500
37.879
46.875
49.725
48.363
60.123
68.681
61.805
63.981
79.976
70
70
60
75
60
75
75
60
75
75
65
60
75
VGA
VGA
VGA
VESA
VESA
VESA
MAC
VESA
VESA
MAC
VESA
VESA
VESA
Indicator
Normal
Stand-by/Suspend
DPMS Off
bule
amber
amber
LED Color
Mode

A17
Specifications
Signal Connector Pin Assignment
18
9
17 24
16
Pin Signal(DVI-D)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
T. M. D. S. Data2-
T. M. D. S. Data2+
T. M. D. S. Data2/4 Shield
T. M. D. S. Data4-
T. M. D. S. Data4+
DDC Clock
DDC Data
Analog Vertical Sync.
T. M. D. S. Data1-
T. M. D. S. Data1+
T. M. D. S. Data1/3 Shield
T. M. D. S. Data3-
T. M. D. S. Data3+
+5V Power
Ground
(return for +5V,
H. Sync. and V. Sync.)
Pin Signal(DVI-D)
16
17
18
19
20
21
22
23
24
Hot Plug Detect
T. M. D. S. Data0-
T. M. D. S. Data0+
T. M. D. S. Data0/5 Shield
T. M. D. S. Data5-
T. M. D. S. Data5+
T. M. D. S. Clock Shield
T. M. D. S. Clock+
T. M. D. S. Clock-
T. M. D. S. (Transition Minimized Differential Signaling)
DVI-D Connector

A18
How to Install the VESA Standard wall mounting
This monitor meets VESA-compliant mounting interface pad
specifications.
1. Please the monitor on a piece of cloth or other soft surface with the
front side facing downward and remove the rear cap.
2. Slide off the lower section of the cover
base with two hands as shown in the
picture.
3. Separate the stand base using a
screwdriver as shown in the picture.
4. Install the VESA standrad wall mounting.
Kensington Security Slot- optional
Connected to a locking
cable that can be purchased
separately at most computer
stores
VESA wall mounting
Connected to another object (stand type
and wall-mounted type. This monitor
accepts a VESA-compliant mounting
interface pad.-optional)
For further information, refer to the VESA
Wall Mounting Instruction Guide.

A19
Making use of USB (Universal Serial Bus) - Optional
USB (Universal Serial Bus) is an innovation in connecting your different
desktop peripherals conveniently to your computer. By using the USB, you will
be able to connect your mouse, keyboard, and other peripherals to your display
instead of having to connect them to your computer. This will give you greater
flexibility in setting up your system. USB allows you to connect a chain of up to
120 devices on a single USB port; and you can “hot” plug (attach them while
the computer is running) or unplug them while maintaining the Plug and the
Plug auto detection and configuration. This display has an integrated BUS-
powered USB hub, allowing up to 2 other USB devices to be attached it.
USB connection
1. Connect the upstream port of the display to the downstream port of the USB
compliant PC or another hub using the USB cable. (Computer must have a
USB port)
2. Connect the USB compliant peripherals to the downstream ports of the
display.
NOTE
To activate the USB hub function, the display must be connected to a USB compliant PC(OS)
or another hub with the USB cable(enclosed).
When connecting the USB cable, check that the shape of the connector at the cable side
matches the shape at the connecting side.
Even if the display is in a power saving mode, USB compliant devices will function when they
are connected the USB ports(both the upstream and downstream) of the display.
USB downstream Port
connect the cables from USB
compliant peripherals-such as
keyboard, mouse, etc
This is a simplified representation
of rear view.
To USB downstream port of
the USB compliant PC or
another hub cable
USB upstream Port