NEC Projector LT20 User Manual

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The Projector has multilingual On-Screen menus that allow you
to make image adjustments and change a variety of settings. The
projector will automatically detect the source.
How to operate
1.To open the OSM menu, press “Menu” on the Remote Control
or Control Panel.
2.When OSM is displayed, use   keys to select any item in the
main menu.  While making a selection on a particular page, press
“Enter” key to enter sub menu.
3.Use  keys to select the desired item and adjust the
settings by 
  key.
4.Select the next item to be adjusted in the sub menu and adjust as
described above.
5.Press “Exit” to confirm, and the screen will return to the main
menu.
6.To exit, press “Exit” again.  The OSM menu will close and the
projector will automatically save the new settings.
On-Screen Menus
Main Menu
Sub Menu
Setting
User Controls 
						

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Language
Language
Choose the multilingual OSM menu . Use the or  key to select
your preferred language.
Press “Enter” to finalize the selection.
User Controls 
						

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Image (All)
Brightness
Adjust the brightness of the image.
Press the  to darken image.
Press the  to lighten the image.
Contrast
The contrast controls the degree of difference between the lightest
and darkest parts of the picture. Adjusting the contrast changes
the amount of black and white in the image.
Press the  to decrease the contrast.
Press the  to increase the contrast.
White Peaking
White peaking can be incrementally adjusted between 0 and 10.
Click on the slider bar to adjust.  The default value for computer is
10.  The default value for video is 2. If the default value is changed,
the display mode will change to user mode automatically.
Setting 10 will maximize brightness and contrast.
Setting 0 will maximize color reproduction quality.
Color Temperature
Adjust the color temperature. At higher temperature, the screen
looks colder; at lower temperature, the screen looks warmer.
Keystone
Adjust image distortion caused by tilting projector. (±8 degrees)
Aspect Ratio
Use this function to choose your desired aspect ratio.
User Controls 
						

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Image (All)
4:3 : The input source will be scaled to fit the projection-screen.
16:9 : The input source will be scaled to fit the width of the
screen.
Display Mode
There are many factory presets optimized for various types of
images.
Presentation : For presentation.
Video : For home theater.
Game : For game.
sRGB : For PC standard color.
User : Memorize user’s settings.
Reset
Choose “Yes” then “Enter” pressed, the display parameters on this
menu will return to their factory default settings.
User Controls 
						

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Image Computer
(Computer mode)
Auto Adjust
The projector automatically adjusts clock, phase, horizontal
and vertical. With most signal sources, Auto Adjust provides the
best results.
Clock
“Clock”changes the display data frequency to match the
frequency of your computer’s graphic card. If you experience a
vertical flickering bar, use this function to make an adjustment.
Phase
“Phase” synchronizes the signal timing of the display with the
graphic card. If you experience an unstable or flickering image, use
this function to correct it.
Horizontal Position
Press the  to move the image left.
Press the  to move the image right.
Vertical Position
Press the  to move the image down.
Press the  to move the image up.
Reset
Choose “Yes” then “Enter” pressed, the display parameters on this
menu will return to their factory default settings.
User Controls 
						

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Image Video
(Video mode)
Color
Adjusts a video image from black and white to  fully saturated
color.
Press the  to decrease the amount of color in the image.
Press the  to increase the amount of color in the image.
Sharpness
Adjusts the sharpness of the image.
Press the  to decrease the sharpness.
Press the  to increase the sharpness.
Hue
Adjusts the color balance of red and green.
Press the  to increase the amount of green in the image.
Press the  to increase the amount of red  in the image.
Reset
Choose “Yes” then “Enter” pressed, the display parameters on this
menu will return to their factory default settings.
User Controls 
						

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Setup
Menu Location
Choose the menu location on the display screen.
Orientation
Front-Desktop
The factory default setting.
Rear-Desktop
When you select this function, the projector reverses the image
so you can project behind a translucent screen.
Lamp Hour
Display the cumulative lamp operating time.  The lamp hour in
OSM is calculated by “Normal mode”, when “ECO mode” is
selected, the system will convert from “ECO mode” lamp hour to
“Normal mode”.
Signal Type
Select signal type RGB or Video sources.
Search Signal Lock
When this function is turned off, the projector will search for other
signals if the current input signal is lost. When this function is
turned on, it will search specified connection port.
Fan Mode
Choose “High” to turn on High Altitude mode. Operates the fans at
full speed continuously to allow for proper high altitude cooling of
the projector.  Choose ”Normal” to return standard mode.
User Controls
Remark :
 The formula is : “ECO
mode” lamp hours x
0.67 = “Normal mode”
lamp hours. 
						

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Setup
User Controls
Lamp Mode
Choose “ECO” to dim the projector lamp which will lower power
consumption and extend the lamp life by up to 150%. Choose
”Normal” to return standard mode.
Lamp Reminding
Choose this function to show or to hide the warning message when
the changing lamp message is displayed.  The message will show up
100 hours before end of life.
Clear Lamp Hour
Turns the lamp hour counter to 0 hours.
Reset
Choose “Yes” then “Enter” pressed, the display parameters (except
for Lamp Hour) on this menu will return to their factory default
settings.
Reset (All)
Choose “Yes” then “Enter” pressed, the display parameters (except
for Lamp Hour) on all menus will return to their factory default
settings. 
						

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Appendices
Problem: No image appears on-screen.
Ensure all the cables and power connections are correctly and
securely connected as described in the “Installation” section.
Ensure the pins of connectors are not crooked or broken.
Check if the projection lamp has been securely installed. Please
refer to the “Replacing the lamp” section.
Make sure you have removed the lens cap and the projector is
switched on.
Press “Picture Mute” button to make sure the image has not been
turned off temporarily.
Problem: Partial, scrolling or incorrectly displayed image.
Press the “AUTO ADJ.” button on the Remote Control or Control
Panel.
If you use a PC:
If the resolution of your computer is higher than 1024 x 768.
Follow the steps outlined below to reset the resolution.
For Windows 3.x:
1.In the Windows Program Manager, click the “Windows Setup”
icon in the Main group.
2.Verify that your display resolution setting is less than or equal
to 1024 x 768.
For Windows 95,98,2000,XP:
1.Open “My Computer” icon, the “Control Panel” folder, and
then double click on the “Display” icon.
2.Select the “Setting” tab.
3.In the “Desktop Area” you will find the resolution setting.
Verify that the resolution setting is less than or equal to 1024 x
768  resolution.
If the projector is still not projecting the whole image, you will
also need to change the monitor display you are using. Refer to
the following steps.
Troubleshooting
If you experience trouble with the projector, refer to
the following information.  If the problem persists, please
contact your local reseller or service center. 
						

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Appendices
4.Follow the above steps 1-2. Click on the “Advanced Properties”
button.
5.Select the “Change” button under the “Monitor” tab.
6.Click on “Show all devices”. Then select “Standard monitor
types” under the “Manufacturers” box; choose the resolution
mode you need under the “Models” box.
7.Verify that the resolution setting of the monitor display is less
than or equal to 1024 x 768.
If you are using a Notebook PC:
1.You are required to implement the above steps of resolution
setting of the computer first.
2.Switch the Notebook PC display to the “external display only”
or “CRT only” mode.
If you experience difficulty in changing resolutions or your
monitor freezes, restart all the equipment and the projector.
Problem: The screen of the Notebook or PowerBook computer
is not displaying your presentation.
If you are using a Notebook PC:
Some Notebook PCs may deactivate their screens when a second
display device is in use.  Refer to your computer’s documentation
for information on how to reactivate the monitor display.
If you are using an Apple PowerBook:
In Control Panels, open the PowerBook Display to select Video
Mirroring “On”.
Problem: Image is unstable or flickering
Use “Phase” to correct it.  Refer to page 21.
Change the monitor color setting from your computer.
Problem: Image has vertical flickering bar
Use “Clock” to make an adjustment.  Refer to page 21.
Check and reconfigure the display mode of your graphic card to
make it compatible with the projector.  Refer to page 25.
Problem: Image is out of focus
Adjusts the Focus Ring on the projector lens.  Refer to page 14.
Make sure the projection-screen is between the required distance
4.9 to 32.8 feet (1.5 to 10.0 meters) from the projector.