NEC Lt35 Portable Projector Users Manual

							Portable Projector
LT35/LT30/LT25
User’s Manual 
						

							© NEC Viewtechnology, Ltd. 2005
First edition September 2005
•Digital Light Processing and DLP are trademarks of Texas Instruments.
•IBM is a trademark or registered trademark of International Business Machines Corporation.
•Macintosh, Mac OS X and PowerBook are trademarks of Apple Computer, Inc., registered in the U.S. and other
countries.
•Windows, Windows 98, Windows Me, Windows XP or Windows 2000 are trademarks or registered trademarks of
Microsoft Corporation.
•Other product and company names mentioned in this users manual may be the trademarks or registered trade-
marks of their respective holders.
NOTES
(1) The contents of this guide may not be reprinted in part or whole without permission.
(2) The contents of this guide are subject to change without notice.
(3) Great care has been taken in the preparation of this manual; however, should you notice any questionable points,
errors or omissions, please contact us.
(4) Notwithstanding article (3), NEC will not be responsible for any claims on loss of profit or other matters deemed to
result from using the Projector. 
						

							i
Important Information
Safety Cautions
Precautions
Please read this manual carefully before using your NEC LT35/LT30/LT25 projector and keep the manual handy for
future reference. Your serial number is located on the bottom of your projector. Record it here:
CAUTION
To turn off main power, be sure to remove the plug from power outlet.
The power outlet socket should be installed as near to the equipment as possible, and should be easily
accessible.
CAUTION
TO PREVENT SHOCK, DO NOT OPEN THE CABINET.
THERE ARE HIGH-VOLTAGE COMPONENTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
This symbol warns the user that uninsulated voltage within the unit may be sufficient to cause electrical
shock. Therefore, it is dangerous to make any kind of contact with any part inside of the unit.
This symbol alerts the user that important information concerning the operation and maintenance of this
unit has been provided.
The information should be read carefully to avoid problems.
WARNING: TO PREVENT FIRE OR SHOCK, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.
DO NOT USE THIS UNIT’S PLUG WITH AN EXTENSION CORD OR IN AN OUTLET UNLESS ALL THE PRONGS
CAN BE FULLY INSERTED.
DOC Compliance Notice (for Canada only)
This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Acoustic Noise Information Ordinance-3. GSGV (for Germany only):
The sound pressure level is less than 70 dB (A) according to ISO 3744 or ISO 7779.
Disposing of your used product
WARNING TO CALIFORNIA RESIDENTS:
Handling the cables supplied with this product, will expose you to lead, a chemical known to the State of California
to cause birth defects or other reproductive harm. Wash hands after handling.
EU-wide legislation as implemented in each Member State requires that used electrical and electronic
products carrying the mark (left) must be disposed of separately from normal household waste. This
includes projectors and their electrical accessories or lamps. When you dispose of such products, please
follow the guidance of your local authority and/or ask the shop where you purchased the product.
After collecting the used products, they are reused and recycled in a proper way. This effort will help us
reduce the wastes as well as the negative impact such as mercury contained in a lamp to the human
health and the environment at the minimum level.
The mark on the electrical and electronic products only applies to the current European Union Member
States. 
						

							ii
Important Information
RF Interference (for USA only)
WARNING
The Federal Communications Commission does not allow any modifications or changes to the unit EXCEPT those
specified by NEC Solutions (America), Inc. in this manual. Failure to comply with this government regulation could
void your right to operate this equipment. This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates, uses, and can radi-
ate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in a particular
installation.
If this equipment does cause harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
•Consult the dealer or an experienced radio / TV technician for help.
For UK only: In UK, a BS approved power cable with moulded plug has a Black (five Amps) fuse installed for use with
this equipment. If a power cable is not supplied with this equipment please contact your supplier.
Important Safeguards
These safety instructions are to ensure the long life of your projector and to prevent fire and shock. Please read them
carefully and heed all warnings.
Installation
• Do not place the projector in the following conditions:
-on an unstable cart, stand, or table.
-near water, baths or damp rooms.
-in direct sunlight, near heaters or heat radiating appliances.
-in a dusty, smoky or steamy environment.
-on a sheet of paper or cloth, rugs or carpets.
• If you wish to have the projector installed on the ceiling:
-Do not attempt to install the projector yourself.
-The projector must be installed by qualified technicians in order to ensure proper operation and reduce the
risk of bodily injury.
-In addition, the ceiling must be strong enough to support the projector and the installation must be in accor-
dance with any local building codes.
-Please consult your dealer for more information.
10˚
Place the projector in a horizontal position
The tilt angle of the projector should not exceed 10 degrees, nor should the projector be installed in any way other than
the desktop and ceiling mount, otherwise lamp life could decrease dramatically. 
						

							iii
Important Information
Fire and Shock Precautions
•Ensure that there is sufficient ventilation and that vents are unobstructed to prevent the build-up of heat inside your
projector. Allow at least 4 inches (10cm) of space between your projector and a wall.
•Do not try to touch the ventilation outlet on the right front (when seen from the front) as it can become heated while
the projector is turned on and immediately after the projector is turned off.
•Prevent foreign objects such as paper clips and bits of paper from falling into your projector. Do not attempt to
retrieve any objects that might fall into your projector. Do not insert any metal objects such as a wire or screwdriver
into your project. If something should fall into your projector, disconnect it immediately and have the object removed
by a qualified service personnel.
•Do not place any objects on top of the projector.
•Do not touch the power plug during a thunderstorm. Doing so can cause electrical shock or fire.
•The projector is designed to operate on a power supply of 100-240V AC 50/60 Hz. Ensure that your power supply
fits this requirement before attempting to use your projector.
•Do not look into the lens while the projector is on. Serious damage to your eyes could result.
•Keep any items such as magnifying glass out of the light path of the projector. The light being projected from the lens
is extensive, therefore any kind of abnormal objects that can redirect light coming out of the lens, can cause unpre-
dictable outcome such as fire or injury to the eyes.
•Do not cover the lens with the black lens cap or equivalent while the projector is on. Doing so can lead to melting of
the cap and possibly burning your hands due to the heat emitted from the light output.
•Do not place any objects, which are easily affected by heat, in front of the projector lens or a projector exhaust vent.
Doing so could lead to the object melting or getting your hands burned from the heat that is emitted from the light
output and exhaust.
•Handle the power cable carefully. A damaged or frayed power cable can cause electric shock or fire.
-Do not use any power cables than the supplied one.
-Do not bend or tug the power cable excessively.
-Do not place the power cable under the projector, or any heavy object.
-Do not cover the power cable with other soft materials such as rugs.
-Do not heat the power cable
-Do not handle the power plug with wet hands.
•Turn off the projector, unplug the power cable and have the object removed by a qualified NEC service personnel
under the following conditions:
-When the power cable or plug is damaged or frayed.
-If liquid has been spilled into the projector, or if it has been exposed to rain or water.
-If the projector does not operate normally when you follow the instructions described in this users manual.
-If the projector has been dropped or the cabinet has been damaged.
-If the projector exhibits a distinct change in performance, indicating a need for service.
-If the projector is not to be used for an extended period of time.
•Disconnect the power cable and any other cables before carrying the projector
•Turn off the projector and unplug the power cable before cleaning the cabinet or replacing the lamp.
CAUTION
•Do no use the tilt-foot for purposes other than originally intended. Misuses such as using the tilt foot to carry or
hang (from the wall or ceiling) the projector can cause damage to the projector.
•Do not send the projector in the soft case by parcel delivery service or cargo shipment. The projector inside
the soft case could be damaged.
•Select [High] in Fan mode if you continue to use the projector for consecutive days. (From the menu, select
[Setup - Options] → [Fan Mode] → [High].)
•Do not unplug the power cable from the wall outlet or projector when the projector is powered on. Doing so can
cause damage to the AC IN connector of the projector and (or) the prong plug of the power cable.
•Do not turn off the AC power for 60 seconds after the lamp is turned on and while the POWER indicator is
blinking green.
Doing so could cause premature lamp failure. 
						

							iv
Remote Control Precautions
•Handle the remote control carefully.
•If the remote control gets wet, wipe it dry immediately.
•Avoid excessive heat and humidity.
•Do not heat, take apart, or throw batteries into fire.
•If you will not be using the remote control for a long time, remove the batteries.
•Ensure that you have the batteries polarity (+/–) aligned correctly.
•Do not use new and old batteries together, or use different types of batteries together.
•Dispose of used batteries according to your local regulations.
Lamp Replacement
•To replace the lamp, follow all instructions provided on page 47 to 49.
•Be sure to replace the lamp when the message [The lamp has reached the end of its usable life. Please
replace the lamp.] appears. If you continue to use the lamp after the lamp has reached the end of its usable
life, 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 dealer for lamp replacement.
A Lamp Characteristic
The projector has a high-pressure mercury lamp as a light source.
A lamp has a characteristic that its brightness gradually decreases with age. Also repeatedly turning the lamp on
and off will increase the possibility of its lower brightness.
CAUTION:
When removing the lamp from a ceiling-mounted projector, make sure that no one is under the projector. Glass
fragments could fall if the lamp has been burned out.
Important Information 
						

							v
Table of Contents
Important Information...........................................................................i
1. Introduction........................................................................................1

 Whats in the Box? ........................................................................................................ 1
 Introduction to the Projector ......................................................................................... 2
 Part Names of the Projector ......................................................................................... 4
Top Features ........................................................................................................... 6
Terminal Panel Features ......................................................................................... 6
 Part Names of the Remote Control .............................................................................. 7
Battery Installation ............................................................................................. 8
Remote Control Precautions .............................................................................. 8
Operating Range for Wireless Remote Control .................................................. 8
2. Installation and Connections.........................................................9

 Setting Up the Screen and the Projector ...................................................................... 9
Selecting a Location ................................................................................................ 9
Throw Distance and Screen Size .......................................................................... 10
 Making Connections ................................................................................................... 12
Connecting Your PC or Macintosh Computer ........................................................ 12
To connect SCART output (RGB) ......................................................................... 13
Connecting Your DVD Player with Component Output .......................................... 14
Connecting Your VCR or Laser Disc Player .......................................................... 15
Connecting the Supplied Power Cable ................................................................. 16
3. Projecting an Image (Basic Operation)......................................17

 Turning on the Projector ............................................................................................. 17
Note on Startup Screen (Menu Language Select screen) .................................... 18
 Selecting a Source ..................................................................................................... 19
 Adjusting the Picture Size and Position ...................................................................... 20
 Adjusting Focus Manually ........................................................................................... 24
 Correcting Keystone Distortion Manually ................................................................... 25
 Optimizing RGB Picture Automatically ....................................................................... 26
 Adjusting Volume Up or Down .................................................................................... 26
 Turning off the Projector ............................................................................................. 27
	 After Use .....................................................................................................................27 
						

							vi
Table of Contents
4. Convenient Features......................................................................28

 Turning Off the Image and Sound ............................................................................... 28
 Freezing a Picture ....................................................................................................... 28
 Changing Lamp Mode ................................................................................................ 28
 Preventing the Unauthorized Use of the Projector ..................................................... 28
 Using the Optional Remote Mouse Receiver ............................................................. 31
5. Using On-Screen Menu.................................................................32

 Using the Menus ......................................................................................................... 32
 Menu Elements ........................................................................................................... 34
 List of Menu Items ...................................................................................................... 35
 Menu Descriptions & Functions [Picture] .................................................................... 37
 Menu Descriptions & Functions [Image Options] ....................................................... 38
 Menu Descriptions & Functions [Setup] ..................................................................... 40
[Setup - General] ................................................................................................... 40
[Setup - Installation] .............................................................................................. 41
[Setup - Options] ................................................................................................... 43
 Menu Descriptions & Functions [Information] ............................................................. 44
 Menu Descriptions & Functions [Reset] ..................................................................... 45
6. Maintenance....................................................................................46

  Cleaning the Lens and the Focus Sensor ................................................................. 46
  Cleaning the Cabinet ................................................................................................. 46
  Replacing the Lamp ................................................................................................... 47
7. Appendix...........................................................................................50

  Troubleshooting ......................................................................................................... 50
  Specifications ............................................................................................................ 53
  Cabinet Dimensions .................................................................................................. 55
  Pin Assignments of D-Sub COMPUTER Input Connector ........................................ 56
  Compatible Input Signal List ...................................................................................... 57
  PC Control Codes and Cable Connection ................................................................. 58
  Troubleshooting Check List ........................................................................................ 59
  TravelCare Guide ....................................................................................................... 61 
						

							1

 Whats in the Box?
Make sure your box contains everything listed. If any pieces are missing, contact your dealer.
Please save the original box and packing materials if you ever need to ship your projector.
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POWERS
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Lens cap
(24F41351)
Power cable
(US: 7N080204)
(EU: 7N080008)VGA signal cable
(7N520054)Soft case
(24BS7551)
CD-ROM
User’s manual
For North America only
Registration card
Limited warranty
For Europe only
Guarantee policy
Quick Setup Guide
Important Information
1. Introduction
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ELAMP MODE FOCUS
Remote control
(7N900681)Batteries (AAA
2) 
						

							2
1. Introduction
 Introduction to the Projector
This section introduces you to your new projector and describes the features and controls.
Congratulations on Your Purchase of the Projector
This projector is one of the very best projectors available today. The projector enables you to project precise images up
to 300 inches across (measured diagonally) from your PC or Macintosh computer (desktop or notebook), VCR, DVD
player, document camera, or a laser disc player.
You can use the projector on a tabletop or cart, you can use the projector to project images from behind the screen,
and the projector can be permanently mounted on a ceiling*
1. The remote control can be used wirelessly.
*
1Do not attempt to mount the projector on a ceiling yourself.
The projector must be installed by qualified technicians in order to ensure proper operation and reduce the
risk of bodily injury.
In addition, the ceiling must be strong enough to support the projector and the installation must be in accor-
dance with any local building codes. Please consult your dealer for more information.
Features youll enjoy:
•Auto Focus function
When you turn on the power, change the zoom or reposition the projector, the Auto Focus function will work
instantly.
The focus sensor on the projector detects the distance to the screen and automatically adjusts the focus of an
image as well as reducing the required set-up time.
•Auto vertical keystone correction up to +/– 16 degrees
•Built-in Wall Color Correction presets provide for adaptive color correction when projecting onto non-white
screen material
•Direct Power Off
The projector has a feature called Direct Power Off. This feature allows the projector to be turned off (even
when projecting an image) using a power strip equipped with a switch and a breaker.
Also, the power cable can be removed immediately after turning off the projector.
•HDTV (1080i, 720p) and SDTV (576p, 480p) compatibility
•Integrated de-interlace video processing technology
•Display popular wide screen and full screen aspect ratios – 16:9 and 4:3
•Built-in speaker for an integrated audio solution
•High resolution display - up to SXGA+ compatible, XGA native resolution.
•Multiple video mode selections (depending on your source)
•Safety protect by Security function
Security feature prevents unauthorized individuals from displaying images.
•You can control the projector with a PC or control system using the PC Control port.
•Easy set up and operation
•The contemporary cabinet design is light, compact and complements any office, boardroom or Auditorium.