NEC Lt280 Portable Projector Users Manual

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6. Using On-Screen Menu
 Menu Descriptions & Functions [Reset]
Returning to Factory Default
The Reset feature allows you to change adjustments and settings to the factory preset for sources by the following
methods:
[Current Signal]
Resets the adjustments for the current signal to the factory preset levels.
All the items in [Adjust] can be reset.
[All Data]
Reset all the adjustments and settings for all the signals to the factory preset except [Entry List], [Language],
[Background], [Control Panel...

102
7. Maintenance
SELECT
This section describes the simple maintenance procedures you should follow to clean the filter and replace the lamp.

 Cleaning or Replacing the Filter
The air-filter sponge keeps dust and dirt from getting inside the projector and should be cleaned after every 100 hours
of operation (more often in dusty conditions). If the filter is dirty or clogged, your projector may overheat.
CAUTION
•Turn off the projector, turn off the main power switch and unplug the projector before...

103
7. Maintenance
3. Reinstall the new filter cover.
NOTE: Do not wash the filter with soap and water. Soap and water will damage the filter membrane. Before replacing the filter,
remove dust and dirt from the projector cabinet. Keep out dust and dirt during filter replacement.
NOTE: When you replace the lamp, it is also wise to replace the filter. The filter comes in the same package with your replacement
lamp.
 Cleaning the Cabinet and the Lens
1. Turn off the projector before cleaning.
2. Clean the...

104
7. Maintenance
 Replacing the Lamp
After your lamp has been operating for 2000 hours (up to 3000 hours in Eco mode) or longer, the LAMP indicator in the
cabinet will blink red and the message [The lamp has reached the end of its usable life. Please replace the lamp.]
will appear. Even though the lamp may still be working, replace it at 2000 (up to 3000 hours in Eco mode) hours to
maintain optimal projector performance. After replacing the lamp, be sure to clear the lamp hour meter. (→ page 101)...

105
7. Maintenance
3. Loosen the two screws securing the lamp housing until the phillips screwdriver goes into a freewheeling
condition. The two screws are not removable.
Remove the lamp housing by holding it.
NOTE: There is an interlock on this case to prevent the risk of electrical shock. Do not attempt to circumvent this interlock.
4. Insert a new lamp housing until the lamp housing is plugged into the socket.
CAUTION
Do not use a lamp other than the NEC replacement lamp VT75LP.
Order this from your...

106
7. Maintenance
6. Connect the supplied power cable, turn on the Main Power switch and turn on the projector.
7. Finally, select the menu 
→ [Reset] → [Clear Lamp Hours] to reset the lamp usage hours.
NOTE: When the lamp exceeds 2100 hours (up to 3100 hours in Eco mode) of service, the projector cannot turn on and the menu is
not displayed.
If this happens, press the HELP button on the remote control for 10 seconds to reset the lamp clock back to zero.
When the lamp time clock is reset to zero, the...

107
8. Appendix

 Troubleshooting
This section helps you resolve problems you may encounter while setting up or using the projector.
Indicator Messages
Power Indicator
Indicator Condition
Projector Condition Note
Off
Blinking light
Steady lightGreen
Orange
Green
Orange0.5 sec On,
0.5 sec Off
2.5 sec On,
0.5 sec Off
0.5 sec On,
0.5 sec OffThe main power is off
The projector is getting ready to turn on.
Off Timer is activated.
The projector is cooling down.
The projector is turned on.
The projector is in...

108
8. Appendix
Common Problems & Solutions (→ Power/Status/Lamp Indicator on page 107)
Does not turn on
Will turn off
No picture
Color tone or hue is
unusual
Image isn’t square to
the screen
Picture is blurred
Image is scrolling
vertically, horizontally
or both
Remote control does
not work
Indicator is lit or
blinking
Vertical stripes in RGB
mode
USB mouse does not
work•Check that the power cable is plugged in and that the power button on the projector cabinet or the remote
control is on. (→ page 23,...

109
8. Appendix
If there is no picture, or the picture is not displayed correctly.
•Power on process for the projector and the PC.
Be sure to connect the projector and notebook PC while the projector is in standby mode and before turning on the
power to the notebook PC.
In most cases the output signal from the notebook PC is not turned on unless connected to the projector before
being powered up.
NOTE: You can check the horizontal frequency of the current signal in the projector’s menu under Information....

110
8. Appendix
 Specifications
This section provides technical information about the projectors performance.
Model Number LT380/LT280
Optical
LCD Panel LT380: 0.8 p-Si TFT active-matrix with Micro Lens Array
LT280: 0.7 p-Si TFT active-matrix with Micro Lens Array
Resolution 1024 
 768 pixels* up to UXGA with Advanced AccuBlend
Lens Manual zoom and focus:
LT380: F1.7 - 2.0    f=24.2 - 29.0 mm
LT280: F1.7 - 2.0    f=21.6 - 25.9 mm
Lamp 200 W DC (152 W DC in Eco mode)
Image Size 21 inches - 300 inches...