NEC Projector LT35 LT30 LT25 User Manual

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Setting Off Timer [Off Timer]
You can use the Off Timer feature to turn off the projector automatically at a preset time.
Eight preset times can be selected:Off, 0:30, 1:00, 2:00, 4:00, 8:00, 12:00 and 16:00.
Enabling or Disabling Auto Focus [Auto Focus]
This option turns on or off the Auto Focus feature. (→ page 22)
NOTE:
When the “Auto Focus” is on, the Auto Focus function works instantly under the following conditions:
•When you turn on the power.
•When you change the zoom.
•When you reposition the projector.
Enabling Auto Start [Auto Start]
Turns the projector on automatically when the power cable is inserted into an active power outlet. This eliminates the
need to always use the POWER button on the remote control or projector cabinet.
Last ....................... When the projector is turned off with the POWER button (placed into stand-by mode) and then the power
cable is disconnected, Auto Start will not be activated after power (AC) is applied.
When the projector is turned off with the Direct Power Off function or after power (AC) is removed (no
stand-by mode), Auto Start will be activated after power (AC) is applied.
The Direct Power Off function means you can turn off the power (AC) to the projector using a power strip
equipped with a switch and a breaker.
Enabling Power Management [Power Management]
When this option is selected you can enable the projector to automatically turn off (at the selected time: 5min., 10min.,
20min., 30min.) if there is no signal received by any input.
Enabling Fan Speed Mode [Fan Mode]
This option allows you to select two modes for fan speed: Auto mode and High speed mode.
Auto ...................... The built-in fans automatically run at a variable speed according to the internal temperature.
High ...................... The built-in fans run at a fixed high speed.
When you wish to cool down the temperature inside the projector quickly, select [High].
NOTE: It is recommended that you select High speed mode if you continue to use the projector for consecutive days.
Selecting Signal Format [Signal Select]
[Computer]
Normally select [RGB/Component] and the projector automatically detects a component signal. Select [Scart] for the
European Scart signal.
[Video & S-Video System Select]
This feature enables you to select video standards automatically or manually.
Normally select [Auto] and the projector will automatically detect the video standard.
In the case where the projector has difficulty detecting the video standard, select the appropriate video standard from
the menu. This must be done for Video and S-Video respectively.
5. Using On-Screen Menu
[Setup - Options] 
						

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5. Using On-Screen Menu
 Menu Descriptions & Functions [Information]
Displays the status of the current signal and lamp usage. This item has three pages. The information included is as
follows:
[Usage Time]
[Lamp Life Remaining] (%)*
[Lamp Hours Used] (H)
[Projector Hours Used] (H)
*The progress indicator shows the percentage of remaining bulb life.
The value informs you of the amount of lamp usage. When the remaining lamp time reaches 0, the Remaining
Lamp Time bar indicator changes from 0% to 100 Hours and starts counting down.
If the remaining lamp time reaches 0 hours, the projector will not turn on regardless of whether the lamp mode
is set to Normal or Eco.
[Source]
[Horizontal Frequency] [Vertical Frequency]
[Video Type] [Sync Type]
[Sync Polarity] [Scan Type]
[Version]
[Firmware] Version
[Data] Version
ModelLamp life(H)
Normal Eco
2000 2500Replacement lamp
LT35
LT30/LT25LT35LP
LT30LP 
						

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5. Using On-Screen Menu
 Menu Descriptions & Functions [Reset]
Returning to Factory Default [Reset]
The Factory Default feature allows you to change adjustments and settings to the factory preset for a (all) source (s)
except the following:
[Current Signal]
Resets the adjustments for the current signal to the factory preset levels.
The items that can be reset are: [Preset], [Brightness], [Contrast], [Color], [Hue], [Sharpness], [Aspect Ratio],
[Horizontal Position], [Vertical Position], [Clock], [Phase], [Noise Reduction], [Telecine] and [Volume].
[All Data]
Reset all the adjustments and settings for all the signals to the factory preset.
All items can be reset except [Language], [Background], [Communication Speed], [Security], [Lamp Life Remain-
ing], [Lamp Hours Used], and [Projector Hours Used].
To reset the lamp usage time, see “Clearing Lamp Hour Meter [Clear Lamp Hours]” below.
Clearing Lamp Hour Meter [Clear Lamp Hours]
Resets the lamp clock back to zero. Selecting this option displays submenu for a confirmation.
NOTE: The projector will turn off and go into standby mode after 2100 hours (up to 2600 hours in Eco mode) of service.
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 LAMP indicator goes out.
Do this only after replacing the lamp. 
						

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6. Maintenance
This section describes the simple maintenance procedures you should follow to clean the focus sensor, lens and
replace the lamp.

 Cleaning the Lens and Focus Sensor
Cleaning the lens
Use a blower or lens paper to clean the lens, and be careful not to scratch or mar the lens.
LAMP
STATUS
POWERSOURCE
AUTO ADJ.
FOCUS ON/STAND BYSELECT
Cleaning the focus sensor
Use a blower or lens paper to clean the focus sensor.
Keep finger prints off the focus sensor. Leaving finger prints in the focus sensor might cause poor focus or short auto
focus range.
LAMP
STATUS
POWERSOURCE
AUTO ADJ.FOCUS ON/STAND BYSELECT
 Cleaning the Cabinet
1. Turn off the projector before cleaning.
2. Vacuum the ventilation inlet of the cabinet.
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 Replacing the Lamp
After your lamp has been operating for 2000 hours (up to 2500 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 2500 hours in Eco mode) hours to
maintain optimal projector performance. After replacing the lamp, be sure to clear the lamp hour meter. (→ page 45)
CAUTION
•DO NOT TOUCH THE LAMP immediately after it has been used. It will be extremely hot. Turn the projector off
and then disconnect the power cable. Allow at least one hour for the lamp to cool before handling.
•DO NOT REMOVE ANY SCREWS except two lamp case screws. You could receive an electric shock.
•Do not break the glass on the lamp housing.
Keep finger prints off the glass surface on the lamp housing. Leaving finger prints in the glass surface might
cause an unwanted shadow and poor picture quality.
•The projector will turn off and go into standby mode after 2100 (up to 2600 hours in Eco mode) hours of service.
If this happens, be sure to replace the lamp. If you continue to use the lamp after 2000 hours (up to 2500 hours
in Eco mode) of use, the lamp bulb may shatter, and pieces of glass may be scattered in the lamp case. Do not
touch them as the pieces of glass may cause injury. If this happens, contact your NEC dealer for lamp replace-
ment.
To replace the lamp:
 Optional lamp and tools needed for replacement:
•Replacement lamp LT35LP (LT35) or LT30LP (LT30/LT25)
•Phillips screwdriver or equivalent
1. Place the projector on a soft cloth and turn it over to access the lamp cover on the bottom.
6. Maintenance
2. Loosen the lamp cover screw until the screwdriver goes into a freewheeling condition and remove the
lamp cover.
The lamp cover screw is not removable. 
						

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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.
6. Maintenance
NOTE: There is an interlock on this case to prevent the risk of electrical shock. Do not attempt to circumvent this interlock.
4. Push the part labeled “PUSH” and 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 LT35LP (LT35) or LT30LP (LT30/LT25).
Order this from your NEC dealer.
Secure it in place with the two screws.
Be sure to tighten the screws.
5. Reattach the lamp cover.
6. Tighten the lamp cover screw.
Be sure to tighten the screw.
PUSH
PUSH
PUSHPUSH
Interlock 
						

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6. Maintenance
7. Connect the supplied power cable and turn on the projector.
8. Finally, select the menu 
→ [Reset] → [Clear Lamp Hours] to reset the lamp usage hours.
NOTE: When the lamp exceeds 2100 hours (up to 2600 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 LAMP indicator goes out. 
						

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7. 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 enabled.
The projector is cooling down.
The projector is turned on.
The projector is in Standby.–
Wait for a moment.
–
Wait for a moment.
–
–
Status Indicator
Indicator Condition
Projector Condition Note
Off
Blinking light
Steady lightRed
Green
Orange1 cycle (0.5 sec On,
2.5 sec Off)
2 cycle (0.5 sec On,
0.5 sec Off)
4 cycle (0.5 sec On,
0.5 sec Off)
6 cycle (0.5 sec On,
0.5 sec Off)Normal
Lamp cover error or lamp housing error
Temperature error
Fan error
Lamp error
Re-firing the lamp (The projector is cool-
ing down.)
Control Panel Lock is on.–
Replace the lamp cover or lamp
housing correctly.
The projector is overheated. Move
the projector to a cooler location.
Fans will not work correctly.
Lamp fails to light. Wait a full
minute and then turn on again.
The projector is re-firing.
Wait for a moment.
You have pressed cabinet button
when Control Panel Lock is on.
Lamp Indicator
Indicator Condition
Projector Condition Note
Off
Blinking light
Steady lightNormal
Lamp has reached its end of life. Lamp
replacement message will be displayed.
Lamp has been used beyond its limit. The
projector will not turn on until the lamp is
replaced.
Lamp mode is set to Eco mode Red
Red
Green–
Replace the lamp.
Replace the lamp.
– 
						

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7. Appendix
Common Problems & Solutions (→ Power/Status/Lamp Indicator on page 50.)
Does not turn on
Will turn off
No picture
Picture suddenly
becomes dark
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
Cross color in RGB
mode•Check that the power cable is plugged in and that the power button on the projector cabinet or the remote
control is on. (→ page 16, 17)
•Ensure that the lamp cover is installed correctly. (→ page 48)
•Check to see if the projector has overheated. If there is insufficient ventilation around the projector or if the
room where you are presenting is particularly warm, move the projector to a cooler location.
•Check to see if the lamp usage exceeds 2100 hours (up to 2600 hours : Eco mode). If so, replace the lamp.
After replacing the lamp, reset the lamp hours used.(→ page 45)
•The lamp may fail to light. Wait a full minute and then turn on the power again.
•Ensure that the Power Management or Off Timer is off. (→ page 43)
•Use the VIDEO, the S-VIDEO or the COMPUTER button on the remote control to select your source (Computer,
Video or S-Video). (→ page 19) If there is still no picture, press the button again.
•Ensure your cables are connected properly.
•Use menus to adjust the brightness and contrast. (→ page 38)
•Check to see if the image is muted. (→ page 28)
•Remove the lens cap.
•Reset the settings or adjustments to factory preset levels using the [Reset] in the Menu. (→ page 45)
•Enter your registered keyword if the Security function is enabled. (→ page 28)
•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.
*If the screen goes blank while using your remote control, it may be the result of the computers screen-
saver or power management software.
•See also the next page.
•When one of the following happens, the Lamp mode automatically changes from Normal to Eco.
*When there are no signals (blue or black screen) → To return to the Normal mode, select another available
source.
*When the room where you re presenting is particularly warm → Move the projector to a cooler location.
•Check if an appropriate color is selected in [Wall Color]. If not, select an appropriate option. (→ page 40)
•Adjust [Hue] in [Picture]. (→ page 38)
•Reposition the projector to improve its angle to the screen. (→ page 20, 21)
•Use the Keystone correction function to correct the trapezoid distortion. (→ page 25)
•Make sure that focus is appropriate.
•Reposition the projector to improve its angle to the screen. (→ page 20, 21)
•Ensure that the distance between the projector and screen is within the adjustment range of the lens. (→ page
10)
•Make sure that the distance between the focus sensor and the screen is within the effective range of the Auto
Focus. (→ page 22)
•Make sure that the requirements for the Auto Focus are met. (→ page 22)
•Condensation may form on the lens if the projector is cold, brought into a warm place and is then turned on.
Should this happen, let the projector stand until there is no condensation on the lens.
•Use the VIDEO, the S-VIDEO or the COMPUTER button on the remote control to select your source (Video, S-
Video or Computer). (→ page 19)
•Adjust the computer image manually with the Horizontal and Vertical in the [Image Options] → [Position/
Clock]. (→ page 39)
•Install new batteries. (→ page 8)
•Make sure there are no obstacles between you and the projector.
•Stand within 22 feet (7 m) of the projector. (→ page 8)
•See the POWER/STATUS/LAMP Indicator. (→ page 50)
•Press the AUTO ADJ. button on the projector cabinet or the remote control. (→ page 26)
•Adjust the computer image manually with [Clock] and [Phase] in [Image Options] → [Position/Clock] in the
menu. (→ page 39)
Problem Check These  Items
For more information contact your dealer. 
						

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7. 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.  If it reads “0kHz”,
this means there is no signal being output from the computer. See page 44 or go to next step.
•Enabling the computer’s external display.
Displaying an image on the notebook PC’s screen does not necessarily mean it outputs a signal to the projec-
tor.  When using a PC compatible laptop, a combination of function keys will enable/disable the external display.
Usually, the combination of the ‘Fn” key along with one of the 12 function keys gets the external display to come
on or off.  For example, NEC laptops use Fn + F3, while Dell laptops use Fn + F8 key combinations to toggle
through external display selections.
•Non-standard signal output from the computer
If the output signal from a notebook PC is not an industry standard, the projected image may not be displayed
correctly. Should this happen, deactivate the notebook PC’s LCD screen when the projector display is in use.
Each notebook PC has a different way of deactivate/reactivate the local LCD screens as described in the
previous step. Refer to your computer’s documentation for detailed information.
•Image displayed is incorrect when using a Macintosh
When using a Macintosh with the projector, set the DIPswitch of the Mac adapter (not supplied with the projec-
tor) according to your resolution. After setting, restart your Macintosh for the changes to take affect.
For setting display modes other than those supported by your Macintosh and the projector, changing the DIP
switch on a Mac adapter may bounce an image slightly or may display nothing. Should this happen, set the DIP
switch to the 13” fixed mode and then restart your Macintosh. After that, restore the DIP switches to a
displayable mode and then restart the Macintosh again.
NOTE: A Video Adapter cable manufactured by Apple Computer is needed for a PowerBook which does not have a mini D-Sub
15-pin connector.
•Mirroring on a PowerBook
*When using the projector with a Macintosh PowerBook, output may not be set to 1024 x 768 unless “mirror-
ing” is off on your PowerBook. Refer to owner’s manual supplied with your Macintosh computer for mirroring.
•Folders or icons are hidden on the Macintosh screen
Folders or icons may not be seen on the screen. Should this happen, select [View] → [Arrange] from the Apple
menu and arrange icons.