NEC LT84 User Manual

Ultra-Portable Projector

MultiSync LT84/LT140

User’s Manual

IMPORTANT INFORMATION

Precautions

Please read this manual carefully before using your NEC
MultiSync LT84/LT140 Projector and keep the manual
handy for future reference.
Your serial number is located under the name plate label
on the left side of your MultiSync LT84/LT140. Record it
here:

CAUTION

To turn off main power, be sure to remo ve 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 NO T OPEN THE
CABINET .
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED NEC
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.

3. GSGV Acoustic Noise Information Ordinance:

The sound pressure level is less than 70 dB (A) accord­ing to ISO 3744 or ISO 7779.

RF Interference

WARNING

The Federal Communications Commission does not
allow any modifications or changes to the unit EXCEPT
those specified by NEC Technologies 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 A digital de vice, pursuant to
Part 15 of the FCC Rules.
These limits are designed to provide reasonable pro­tection against harmful interference in a commercial
installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause
harmful interference to radio communications. Opera­tion of this equipment in a residential area is likely to
cause harmful interference in which case the user will
be required to correct the interference at their own
expense.

In UK, a BS approval power cable with moulded plug
has a Black (five Amps) fuse installed for use with this
equipment. If a po wer cable is not supplied with this equip­ment please contact your supplier.

WARNING

TO PREVENT FIRE OR SHOCK, DO NOT EXPOSE THIS
UNIT TO RAIN OR MOISTURE.
DO NOT USE THIS UNIT’S GROUNDED PLUG WITH AN
EXTENSION CORD OR IN AN OUTLET UNLESS ALL
THREE PRONGS CAN BE FULLY INSERTED.
DO NOT OPEN THE CABINET. THERE ARE HIGH-VOLT­AGE COMPONENTS INSIDE. ALL SERVICING MUST BE
DONE BY QUALIFIED NEC SERVICE PERSONNEL.

DOC Compliance Notice

This Class A digital apparatus meets all requirements of
the Canadian Interference-Causing Equipment Regula­tions.

E–2

Important Safeguards

These safety instructions are to ensure the long life of
your projector and to prev ent fire and shock. Please read
them carefully and heed all warnings.

Installation

1. For best results, use your projector in a darkened room.

2. Place the projector on a flat, level surf ace in a dry area away
from dust and moisture.

3. Do not place your projector in direct sunlight, near heaters
or heat radiating appliances.

4. Exposure to direct sunlight, smoke or steam can harm inter­nal components.

5. Handle your projector carefully . Dropping or jarring can dam­age internal components.

6. Do not place heavy objects on top of the projector.

7. If you wish to have the projector installed on the ceiling:
a. Do not attempt to install the projector yourself.
b. The projector must be installed by qualified technicians

in order to ensure proper operation and reduce the risk
of bodily injury.

c. In addition, the ceiling must be strong enough to support

the projector and the installation must be in accordance
with any local building codes.

d. Please consult your dealer for more information.

Power Supply

1. The projector is designed to operate on a power supply of
100-120 or 200-240 V 50/60 Hz A C. Ensure that your power
supply fits this requirement before attempting to use your
projector.

2. Handle the pow er cable carefully and a void e xcessive bend­ing. A damaged cord can cause electric shock or fire.

3. If the projector is not to be used for an extended period of
time, disconnect the plug from the power outlet.

Cleaning

1. Unplug the projector before cleaning.

2. Clean the cabinet periodically with a damp cloth. If heavily
soiled, use a mild detergent. Never use strong detergents
or solvents such as alcohol or thinner.

3. Use a blower or lens paper to clean the lens, and be careful
not to scratch or mar the lens.

Lamp Replacement

• T o replace the lamp , f ollow all instructions provided on page
E-33.

• Be sure to replace the lamp when the Status light comes
on. If you continue to use the lamp after 1000 hours of use,
the lamp bulb may shatter , and pieces of glass ma y 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 replacement.

• Allow a minimum of ONE minute to elapse between turning
the lamp off and on.

High voltage is applied to the lamp immediately when the
power is turned on.

Therefore turning the power off and quickly back on may
shorten the life of your lamp and result in damage to your
projector.

E–3

Fire and Shock Precautions

1. Ensure that there is sufficient ventilation and that vents are
unobstructed to prevent the build-up of heat inside y our pro­jector. Allow at least 3 inches (10cm) of space betw een your
projector and a wall.

2. 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 projector. If something should fall into your projector,
disconnect it immediately and have the object remov ed by a
qualified NEC service personnel.

3. Do not place any liquids on top of your projector.

Warnings

• 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 unpre­dictable outcome such as fire or injury to the eyes.

• Do not cover the lens with the supplied 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 hold the lens part. Doing so may cause the risk of
injuly.

For the optional full function remote control with
the laser pointer

• Do not look into the laser pointer while it is on and do
not point the laser beam at another person. Serious in­jury could result.

E–4

TABLE OF CONTENTS

1. INTRODUCTION

Introduction to the MultiSync LT84/LT140 Projector ....E-6

Getting Started ............................................................ E-6

Getting to Know Your MultiSync LT84/LT140 Projector

Front Features.........................................................E-7

Rear Features ......................................................... E-7

Bottom Features......................................................E-7

Top Features ...........................................................E-8

Terminal Panel Features ......................................... E-9

Remote Control Features...................................... E-10

2. INSTALLATION

Setting Up Your Projector........................................... E-12

Selecting a Location ..................................................E-12

Using a Tabletop or Cart ............................................ E-12

Distance Chart...........................................................E-13

Ceiling Installation ..................................................... E-14

Reflecting the Image.................................................. E-14

Wiring Diagram..........................................................E-15

3. OPERATION

General Controls ....................................................... E-17

Using the Menus........................................................ E-17

Using a USB Mouse ..................................................E-17

Menu T ree.................................................................. E-18

Menu Elements.......................................................... E-19

Menu Descriptions & Functions.................................E-20

Source Select ............................................................E-20

RGB ......................................................................E-20

Video/S-Video ....................................................... E-20

PC Card Viewer.....................................................E-20

Adjustments...............................................................E-20

Picture...................................................................E-20

Volume..................................................................E-20

Image .................................................................... E-20

Auto Adjust ....................................................... E-21

Position.............................................................E-21

Pixel Adjust....................................................... E-21

Resolution......................................................... E-21

Color T emper ature ................................................ E-21

Keystone ............................................................... E-21

Factory Default...................................................... E-21

Image Options ...........................................................E-21

Image Mode .......................................................... E-21

Aspect Ratio ..................................................... E-21

Video Mode...........................................................E-22

Gamma.............................................................E-22

Noise Reduction ...............................................E-22

Color Matrix ...................................................... E-22

Projector Options.......................................................E-22

Menu ..................................................................... E-22

Language .............................................................. E-22

Source Display......................................................E-22

Projector Pointer ...................................................E-22

....E-7

Setup .........................................................................E-23

Orientation ............................................................ E-23

Background...........................................................E-23

Signal Select ......................................................... E-23

Auto Start .............................................................. E-23

Power Panagement............................................... E-23

Power Off Confirmation.........................................E-23

Mouse Settings .....................................................E-23

Keystone Save ......................................................E-23

White Segment ..................................................... E-23

Clear Lamp Hour Meter ........................................ E-23

PC Card Viewer Options .......................................E-24

Capture Options....................................................E-24

Tools ..........................................................................E-24

Capture .................................................................E-24

PC Card Files........................................................ E-25

ChalkBoard ...........................................................E-25

Help ...........................................................................E-25

Contents................................................................ E-25

Source Information................................................ E-25

Projector Information............................................. E-25

Using the PC Card Viewer Fucntion ..........................E-26

Features................................................................E-26

Inserting and Ejecting a CompactFlash™ Card....E-26

Installing the PC Card Viewer

Software................................................................E-27

Starting Up the PC Card Viewer Software

on your PC (PC Card Viewer Utility 1.0) ............. E-27

Operating the PC Card Viewer Function

from the Projector (playback)..............................E-28

Capturing Images Displayed on the Projector.......E-30

Viewing Digital Images.......................................... E-31

Uninstalling the PC Card Viewer Software............ E-31

Terminology........................................................... E-32

4. MAINTENANCE

Replacing the Lamp................................................... E-33

Remote Control Battery Installation...........................E-34

Operating Range .......................................................E-34

5. TR OUBLESHOO TING

Status Light Messages .............................................. E-35

Common Problems & Solutions................................. E-35

When Using the PC Card Viewer Function................E-36

6. SPECIFICATIONS

Optical/Electrical/Mechanical..................................... E-37

Cabinet Dimensions .................................................. E-38

D-Sub Pin Assignments............................................. E-40

Timing Chart .............................................................. E-41

PC Control Codes...................................................... E-42

Cable Connection ...................................................... E-43

E–5

CompactFlash is a trademark of San Disk Corporation.

1. INTRODUCTION

Introduction to the MultiSync LT84/LT140
Projector

This section introduces you to your new MultiSync LT84 (SVGA)/
LT140 (XGA) Projector describes the features and controls.

Congratulations On Your Purchase Of The MultiSync LT84/
LT140 Projector

The MultiSync LT84/LT140 is one of the very best projectors avail­able today. The MultiSync LT84/LT140 enables you to project pre­cise images up to 300 inches across (measured diagonally) from your
PC or Macintosh computer (desktop or notebook), VCR, D VD player,
document camera, a laser disc player, or PC Card Viewer.
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.

Features you’ll enjoy:

• Simple set up and operation.

• Hot air blown from the vents does not bother the audience dur­ing your presentation since the vents are located on the front and
bottom.

• A high-performance AC120 watt P-VIP lamp.

• A wireless card remote control that can be stored in the projec­tor.

• The manual zoom control enables you to adjust the image to be
between 25 and 300 inches (measured diagonally).

• Keystone correction allows you to correct trapezoidal distortion
so that the image is square.

• Y ou can choose between video modes depending on your source:
“normal” for a typical picture, “natural” for true color reproduc­tion.

• The built-in PC Card Viewer allows you to start your presenta­tion even when a PC is not available at the site.

• The “Capture” enables you to capture rhe current projected im­age.

• An image can be projected from in front or behind a screen, and
the projector can even be installed on the ceiling.

• NEC’s exclusive Advanced AccuBlend intelligent pixel blend­ing technology - an extremely accurate image compression tech­nology - offers a crisp image with SXGA (128021024) resolu­tion*3 . You can select any point on the screen with the pointer
and enlarge the selected area.

• Supports most IBM VGA, SVGA, XGA*2 , SXGA(with Ad­vanced AccuBlend)*3, Macintosh, component signal (YCbCr /
YPbPr) or any other RGB signals within a horizontal frequency
range of 15 to 85 kHz and a vertical frequency range of 50 to 85
Hz. This includes NTSC, P AL, PAL60, SECAM and NTSC4.43
standard video signals.

• The supplied card remote control can be used without a cable,
and you can even use the optional full function remote control
and mouse adapter to operate your PC or Macintosh mouse
wirelessly from across the room with the built-in remote mouse
receiver.

• You can control the projector with a PC using the PC Control
port.

• The contemporary cabinet design is light, compact, easy to carry ,
and complements any office, boardroom or auditorium.

• Eight kinds of pointers are available for your presentation.

• USB terminal allows USB mouse operation*4.

*1 Do 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 accordance with any local
building codes. Please consult your dealer for more information.

*2 An XGA image (10242768) is converted into an 8002600 crisp

image with NEC’s Advanced AccuBlend on LT84.

*3 An SXGA image (128021024) is converted into a 10242768

crisp image with NEC’s Advanced AccuBlend on LT140.

*4 The USB terminal meets the USB1.0 specification and accepts a

USB mouse only.

Getting Started

The fastest way to get started is to take your time and do everything
right the first time. Take a few minutes now to click through the CD­ROM and revie w the user’ s manual. This ma y save you time later on.
At the beginning of each section of the manual you’ll find an over­view. If the section doesn’t apply, you can skip it.

NOTE: Composite video standards are as follows:
NTSC: U.S. TV standard for video in U.S. and Canada.

PAL: TV standard used in Western Europe.
PAL60: TV standard used for NTSC playback on PAL TVs.
SECAM: TV standard used in France and Eastern Europe.
NTSC4.43: TV standard used in Middle East countries.

E–6

E–7

Top Features

1

SOURCE AUTO ADJUST

5

7

STATUS
POWER

8

1 Source Button

Use this button to select a video source such as a PC, VCR, DVD
player or PC Card Viewer (CompactFlash card installed).

2 Auto Adjust Button

Use this button to adjust Position-H/V and Pixel Clock/Phase for
an optimal picture. Some signals may not be displayed correctly or
take time to switch to another.

3 Menu Button

Displays the main menu for operation.

2

3

N

E

U

M

4

SELECT

6

E

N

T

E

R

L

E

C

N

A

C

9

/

OFF

ON

7 Status Indicator

When this is lit red continually, it’ s w arning you that the projection
lamp has exceeded 1000 hours of service. After this light appears,
it is advisable to replace the projection lamp as soon as possible.(See
page E-33)
In addition the message “LAMP USAGE XX HOURS” appears
continually when the on-screen menu is not displayed. If this light
blinks red rapidly, it indicates that the lamp cover is not attached
properly or the projector is overheated. See the Status Light Mes­sages on page E-35 for more details.

4 Select (▲▼§ ©) / (+) (–) Buttons

▲▼: Use these buttons to select the menu of the item you wish

to adjust.

§ ©: Use these buttons to change the level of a selected menu

item.
A press of the © button executes the selection. When no menus
appear, these § © buttons work as a volume control.
When the pointer is displayed, these § © ▲▼ buttons move the
pointer.

5 Enter Button

Executes your menu selection and activates items selected from
the menu.

6 Cancel Button

Press this button to exit “Menus”. Press this button to return the
adjustments to the last condition while you are in the adjustment
or setting menu.

8 Power Indicator

When this indicator is green, the projector is on; when the indica­tor is amber, it is in standby mode.

9 Power Button

Use this button to turn the power on and off when the power is
supplied and the projector is in standby mode.

NOTE: To turn off the projector, press and hold this button for a
minimum of two seconds.

E–8

Terminal Panel Features

C

A

N

C

E

L

ER

ON

/

OFF

PC CARD
ACCESS

2

3

PC CONTROL

USB

MOUSE OUT

14

RGB INPUT S-VIDEO

56 7 89 10

This panel is located on the left side and is where you connect your
cables.

1 USB (Mouse) Terminal

Connect a commercially available mouse that supports USB. You
can operate the menu or PC Card Viewer with the USB mouse via
this terminal.
Note that this terminal is not used with a computer and that there
may be some brands of USB mouse that the projector does not
support.

2 PC Card Access Indicator

Lights while accessing a CompactFlash memory card.

Slot for Kensington
MicroSaver Security System

VIDEO AUDIO

(

MONO)R

L

11

7

RGB Input/ Component Input Connector (Mini D-Sub 15 pin)

Connect your PC or other RGB equipment such as IBM or compatible
computers. Use the signal cable that’s supplied to connect to a PC. Or
connect a Macintosh or compatible computer here using the signal
cable and the pin adapter that is supplied. This also serves as a compo­nent input connector which allows you to connect a component video
output of a component equipment such as a DVD player.

8 S-Video Input (Mini DIN 4 Pin)

Here is where you connect the S-Video input from an external
source like a VCR.

NOTE: S-Video provides more vivid color and higher resolution
than the traditional composite video format.

3 Eject Button

Press to eject a CompactFlash memory card.

4 PC Card Access Slot

Insert a CompactFlash memory card here.

5 PC Control Port (Mini DIN 8 Pin)

Use this port to connect your PC to control your projector. This
enables you to use your PC and serial communication protocol to
control the projector. If you are writing your o wn program, typical
PC control codes are on page E-42.
A cap is put on the port at the factory. Remo v e the cap when using
the port.

9 Video Input (RCA)

Connect a VCR, DVD player, laser disc player, or document cam­era here to project video.

10 Left Channel/Mono Audio Input Jack (RCA)

This is the left channel audio input for stereo sound coming from
video equipment or audio system. This also serves as your monau­ral audio input. (Video and S-video only)

Right Channel Audio Input Jack (RCA)

This is the right channel audio input for stereo sound. (Video and
S-video only)

NOTE: Although stereo Audio input jacks are provided, the pro-

6 Mouse Output Port (Mini DIN 8 Pin)

Not available when the supplied card remote is used.

jector will only produce Mono sound. This is due to one speaker
limitation of the projector.

Use this port to operate your computer’s mouse functions from the
NEC optional full function remote control. When your computer
is connected here with the NEC optional full function remote con­trol (LT40RT), the remote sensors on the projector cabinet will
receive your mouse commands.

11 Built-in Security Slot ( )

This security slot supports the MicroSaver® Security System.
MicroSaver® is a registered trademark of Kensington Microware Inc.
The logo is trademarked and owned by Kensington Microware Inc.

E–9

Remote Control Features

R-CLICK

HELP

PIC-MUTEPOINTER

MAGNIFY

SOURCE AUTO ADJ.

COMPUTER PROJECTOR

POWER

+

-

+

-

MENU

PJ

SA

?

OFF ON

LASER

CANCEL

Wireless Card Remote Control
(supplied)

6

NOTE: For the supplied card re­mote control, r emove the transpar­ent insulation tape by pulling it
before use. See page E-34 for bat­tery installation.

H

N

A

P

A

J

S

T

L

M

O

n

V

CR2025

O

3

2

-

L

L

i

L

C

E

Full Function Remote Control
LT40RT (optional)

SOURCE

U

N

E

M

E

N

T

E

R

MAGNIFY

SELECT

POINTER

AUTO

ADJ.

N

A

C

PIC.

MUTE

HELP

L

E

C

1
2

3

4

5

8
9

7

10

17

11

16

12

13

14
18

Wireless Card Remote Control

1 Source Button

Press to select a video source.

2 Auto Adjust Button

Use this button to adjust Position-H/V and Pixel Clock/Phase for
an optimal picture. Some signals may not be displayed correctly,
or in some cases it may take some time for a source to be switched
to another.

3 Menu Button

Displays the main menu for operation.

RD-361E

Remote Jack

Not available on LT84/LT140

4 Select (▲▼§ ©) / Mouse / (+) (–) Buttons

▲▼: Use these buttons to select the menu of the item you wish

to adjust.

§ ©: Use these buttons to change the level of a selected menu

item.
A press of the © button executes the selection. When no menus
appear, these § © buttons work as a volume control.
When the pointer is displayed, these § © ▲▼ buttons move the
pointer. T he Mouse button is a vailable on the full function remote
control only.

NOTE: The Mouse Output port is not available on the card re­mote control because mouse codes are not output.

5 Cancel/ Right Click Button

Press this button to exit “Menus”. Press this button to return the
adjustments to the last condition while you are in the adjustment
or setting menu. The Right-Click button is available on the full

E–10

function remote control only.

6 Enter Button

Executes your menu selection and activates items selected from
the menu.

7 Magnify Button

Use the (+) or (–) button to adjust the image size up to 400%.
When the Pointer is displayed, the magnified image is displayed at
the center of the Pointer. When the Pointer is not displayed, the
magnified image is displayed at the center of the screen.

17

8 Pointer Button

Press this button to display one of the eight pointers; press again to
hide the pointer.

9 Picture Mute Button

This button turns off the image and sound for a short period of
time. Press again to restore the image and sound.

10 Help Button

Provides information about operation and adjustment procedures
or the set information for the current menu or adjustment during
menu operation. This also displays information how to use the Help.

Wireless Full Function Remote Control (Optional)

You can use your optional full function remote control wireless to
operate your projector.
With the mouse output port connected to your computer, you can
also use the projector’s remote control to operate your computer’s
mouse wireless. (See page E-16 to connect your computer to the mouse
output port.)

NOTE: If you are using a Macintosh computer, you can click either
the right or left button to activate the mouse.

11 Power On And Off

If power is applied, you can use this button to turn your projector
on and off.

NOTE: To turn off the projector, press and hold the POWER ON
button for a minimum of two seconds.

12 LED

Flashes when any button is pressed.

13 Computer/Projector Select

Use this button to switch between “Computer” and “Projector”.
When “Computer” is selected, the remote control works as your
computer mouse. In this mode only Mouse pad, Laser, R-Click
and L-Click buttons are available.

14 Laser Button

Press and hold this button to activate the laser pointer. When lit,
you can use the laser to draw your audience’s attention to a red dot
that you can place on any object within 30 feet (10 m).

16

16 Laser Pointer

Beams a laser light when “Laser” button is pressed.

17 Infrared Transmitter

Direct the remote control toward the remote sensor on the projec­tor cabinet.

18 Mouse Pad(▲▼§ ©)

W orks as a mouse for y our projected computer image. This pad is
also used to adjust position.
This pad selects the submenu you want to adjust.
After you make your on-screen menu selection, use this pad to
adjust the level up or down.

15

Remote Control Precautions

• Handle the remote control carefully.

• If the remote control gets wet, wipe it dry immediately.

• Avoid excessive heat and humidity.

• If you will not be using the remote control for a long time, re-

move the batteries.

• Do not place the batteries upside down.

NOTE: Before you use the card remote control for the first time, be
sure to remove the insulation tape from the card remote control.

* Keep the coin cell battery out of reach of children so as not to

allow them to swallow the cell battery.

Also observe the following when using the optional
full function remote:

• Do not look into the laser pointer while it is on.

• Do not point the laser beam at a person.

NOTE:

The optional full function remote contr ol package (L T40RT) includes:

1) Full function remote control

2) Mouse adapter for Macintosh

3) Mouse adapter for IBM PS/2

4) Serial cable

5) Two batteries (AA)

6) Remote control case
The LT40RT optional remote control mouse kit can be obtained

from your dealer at additional cost.

15 Left Click Button

Use this button to enter your menu selection. It works the same as
the “Enter” button on the cabinet or the card remote control.

E–11

2. INSTALLATION

M

E

N

U

E

N

T

E

R

C

A

N

C

E

L

SELECT

POWER

STATUS

ON

/

OFF

SOURCE AUTO

This section describes how to set up your MultiSync LT84/LT140
projector and how to connect video and audio sources.

Setting up Your Projector

Your MultiSync LT84/LT140 Projector is simple to set up and use.
But before you get started, you must first:

1. Determine the image size.

2. Set up a screen or select a non-glossy white wall onto which you
can project your image.

Carrying The Projector: Always carry your projector in the supplied
soft carrying case.

You must put the projector in the soft carrying case with
the lens upward as shown below. This is to prevent the
lens from damage.

Upward

Band

Bottom

2. Connect the power cable, remove the lens cap and turn the projec­tor on. (If no input signal is available, the projector will display a
background image.)

3. Ensure that the projector is square to the screen.

4. Move the projector left or right to center the image horizontally
on the screen.

Top view

Screen

5. To center the image vertically, lift the front edge of the projector
and press the One-Push Tilt buttons on the front side of the pro­jector, just above the feet, to release the Front Adjustable feet.
(There is approximately 5 degrees of up and down adjustment for
the front of the projector.)

Side view

Screen

Carrying Case

NOTE: Do not put a notebook computer in the soft carrying case.
Doing so can cause damage to the computer. When moving the pro­jector or when it is not in use, cover the lens cap.

Attaching the lens cap to
the lens hood with the sup­plied string and rivet.

Rivet

Lens cap

String

Selecting a Location

The further your projector is from the screen or wall, the larger the
image. The minimum size the image can be is approximately 25"
(0.6 m) measured diagonally when the projector is roughly 4 feet
(1.2 m) from the wall or screen. The largest the image can be is 300"
(7.6 m) when the projector is about 40 feet (12.2 m) from the wall or
screen.

PO
W

STATU

ER

S

O

E

N

T

E

N

R

/
O

FF

C

A

N

SELEC

C

E

SO

L

T

U
R

CE

M

E

N

U

AU

TO

POWER

STATUS

ON

E

N

T

E

R

/
OFF

C

A

N

SELECT

C

E

SOURCE AUTO

L

M

E

N

U

6. If necessary, adjust the front or rear feet to properly position the
projected image on the screen.
If the projected image does not appear square to the screen then
use keystone correction for proper adjustment. The Lever-Type
Adjustable Rear foot height can be changed up to 3 degrees.

U

N

E

M

SOURCE AUTO

L

E

C

SELECT

N

A

C

OFF

R

/

E

T

N

E

ON

STATUS

ER

POW

Using a Tabletop or Cart

1. Place your projector on a flat level surface at the optimal distance
from the screen or wall so you realize the size image you want.
(Avoid having bright room lighting or sun light directly on the
screen or wall where you’ll be projecting the image.)

7. Adjust the size of the image using the Zoom ring on the lens.

E–12

D

H

V

Distance Chart

C

Screen center

A

α

Projector base

Screen bottom

Screen

Unit (inch)
A=C/cosα
B=3.7H / 25.4
C(XGA:tele)=(2.41 x H)-2.0 or C(XGA:wide) x 1.2
C(XGA:wide)=(2.0 x H)-2.0
C(SVGA:tele)=(2.43 x H)-1.75 or C(SVGA:wide) x 1.2
C(SVGA:wide)=(2.0 x H)-1.9
D=E/2
E=H/4 x 3
a=H/4 x 5

A: Distance between lens center and screen center
B: Vertical distance between lens center and screen bottom

(screen top for ceiling mount)

C: Horizontal throw distance between screen surf ace and pro-

jector lens

D: Vertical distance between screen center and screen bottom

(screen top for ceiling mount)

E: Screen Height

Screen (inch)

E

D

B

LT84: 1.87”(47.6mm)
LT140: 1.98”(50.4mm)

Unit (mm), H= inch
A=C/cosα
B=3.7H
C(XGA:tele)={(2.41 x H)-2.0} x 25.4 or C(XGA:wide) x 1.2
C(XGA:wide)={(2.0 x H)-2.0} x 25.4
C(SVGA:tele)={(2.43 x H)-1.75} x 25.4 or C(SVGA:wide) x 1.2
C(SVGA:wide)={(2.0 x H)-1.9} x 25.4
D=E/2
E=H/4 x 3
a=H/4 x 5

Installation Angle

The installation angle for the projector
must not exceed +/-15˚.
Deviating from this angle could degrade
the performance of the projector and may
cause reliability problems.

S-VGA (LT84)

a H E C(mm) C(inch) C(mm) C(inch) B(mm) B(inch) B(mm) B(inch)

Screen Size (inch) Projection Distance

Screen size (Diagonal) Screen Width Height of screen WIDE TELE WIDE TELE

25 20 15 – – 1190 46.9 – – 74 2.9
40 32 24 1600 63.0 1930 76.0 117 4.6 117 4.6
60 48 36 2420 95.3 2910 114.6 176 6.9 176 6.9

80 64 48 3240 127.6 3900 153.5 235 9.3 235 9.3
100 80 60 4060 159.8 4890 192.5 294 11.6 294 11.6
120 96 72 4880 192.1 5870 231.1 352 13.9 352 13.9
150 120 90 6110 240.6 7350 289.4 440 17.3 440 17.3
200 160 120 8170 321.7 9820 386.6 587 23.1 587 23.1
240 192 144 9820 386.6 11790 464.2 705 27.8 705 27.8
300 240 180 12280 483.5 – – 881 34.7 881 34.7

V. Distance between Lens Center and Screen Bottom

XGA (LT140)

Screen Size (inch) Projection Distance

a H E C(mm) C(inch) C(mm) C(inch) B(mm) B(inch) B(mm) B(inch)

Screen size (Diagonal) Screen Width Height of screen WIDE TELE WIDE TELE

25 20 15 – – 1170 46.1 – – 74 2.9

40 32 24 1580 62.2 1910 75.2 119 4.7 119 4.7

60 48 36 2400 94.5 2890 113.8 178 7.0 178 7.0

80 64 48 3220 126.8 3870 152.4 237 9.3 237 9.3
100 80 60 4030 158.7 4850 190.9 297 11.7 297 11.7
120 96 72 4850 190.9 5830 229.5 356 14.0 356 14.0
150 120 90 6080 239.4 7300 287.4 445 17.5 445 17.5
200 160 120 8120 319.7 9750 383.9 593 23.3 593 23.3
240 192 144 9750 383.9 11710 461.0 712 28.0 712 28.0
300 240 180 12200 480.3 – – 890 35.0 890 35.0

NOTE: Distances may vary +/–5%.

V. Distance between Lens Center and Screen Bottom

E–13

Ceiling Installation

C

Projector base

α

Screen top

A

Screen center

LT84: 1.87”(47.6mm)
LT140: 1.98”(50.4mm)

B

D

E

WARNING

• Installing your projector on the ceiling must be done by a quali­fied technician. Contact your NEC dealer for more informa­tion.

* Do not attempt to install the projector yourself.

• Only use your projector on a solid, level surface. If the projec­tor falls to the ground, you can be injured and the projector
severely damaged.

• Do not use the projector where temperatures vary greatly . The
projector must be used at temperatures between 41˚F (5˚C)
and 95˚F (35˚C).

• Do not expose the projector to moisture, dust, or smoke. This
will harm the screen image.

• Ensure that you have adequate ventilation around your pro­jector so heat can dissipate. Do not cover the vents on the side
or the front of the projector.

If your projector is mounted on the ceiling and your image is upside
down, use the “Menu” and “Select” buttons on your projector cabi­net or ▲▼ button on your remote control to correct the orientation.
(See page E-23.)

Reflecting the Image

Using a mirror to reflect your projector’s image enables you to enjoy
a much larger image. Contact your NEC dealer if you need a mirror.
If you’re using a mirror and your image is inverted, use the “Menu”
and “Select” buttons on your projector cabinet or ▲▼ buttons on
your remote control to correct the orientation. (See page E-23.)

E–14