NEC Lt157 Lcd Projector Users Manual

							E – 17
Ceiling Installation
Screen Top
1.6” (40.3mm)
Lens Center
Screen Center
Screen Bottom
Throw Distance (C)Throw Angle (α)Projector Foot
D
B
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 in-
jured and the projector severely damaged.
•Do not use the projector where temperatures vary
greatly. The projector must be used at tempera-
tures 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-37.)
Reflecting the ImageUsing 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-37.)
Distance Chart
B=Vertical distance between lens center and
screen center
C=Throw distance
D=Vertical distance between lens center and
screen bottom (screen top for ceiling installa-
tion)
Throw Angle (α) Throw Distance (C)
1.6” (40.3mm) Lens Center Screen Top
Screen Center
Screen BottomDB
Projector Foot
Screen Size B C DαDiagonal Width Height wide tele wide teleinch mm inch mm inch mm inch mm inch mm - inch mm inch mm degree - degree25 635 20 508 15 381 6 152 - - - 46 1166 -2 -39 - - 7.430 762 24 610 18 457 7 182 46 1165 - 56 1413 -2 -47 8.9 - 7.340 1016 32 813 24 610 10 243 62 1576 - 75 1906 -2 -62 8.8 - 7.360 1524 48 1219 36 914 14 364 94 2398 - 114 2891 -4 -93 8.6 - 7.267 1702 54 1361 40 1021 16 406 106 2685 - 127 3236 -4 -104 8.6 - 7.272 1829 58 1463 43 1097 17 437 114 2890 - 137 3482 -4 -112 8.6 - 7.180 2032 64 1626 48 1219 19 485 127 3219 - 153 3877 -5 -124 8.6 - 7.184 2134 67 1707 50 1280 20 509 133 3383 - 160 4074 -5 -131 8.6 - 7.190 2286 72 1829 54 1372 21 546 143 3630 - 172 4369 -6 -140 8.6 - 7.1100 2540 80 2032 60 1524 24 607 159 4040 - 191 4862 -6 -155 8.5 - 7.1120 3048 96 2438 72 1829 29 728 191 4862 - 230 5848 -7 -187 8.5 - 7.1150 3810 120 3048 90 2286 36 910 240 6094 - 288 7326 -9 -233 8.5 - 7.1180 4572 144 3658 108 2743 43 1092 288 7326 - 347 8804 -11 -280 8.5 - 7.1200 5080 160 4064 120 3048 48 1213 321 8148 - 385 9790 -12 -311 8.5 - 7.1210 5334 168 4267 126 3200 50 1274 337 8558 - 405 10283 -13 -327 8.5 - 7.1240 6096 192 4877 144 3658 57 1456 385 9790 - 463 11761 -15 -373 8.5 - 7.1261 6629 209 5304 157 3978 62 1577 418 10612 - 502 12746 -16 -404 8.5 - 7.1270 6858 216 5486 162 4115 64 1638 434 11023 - - - -17 -420 8.5 - -300 7620 240 6096 180 4572 72 1820 482 12255 - - - -18 -466 8.4 - -
NOTE: Distances may vary +/–5%. 
						

							E – 18
NOTE: When using with a notebook PC, be sure to connect between the projector and the notebook PC before turning on the power to the notebook PC. In most casessignal cannot be output from RGB output unless the notebook PC is turned on after connecting with the projector.
NOTE:
* If the screen goes blank while using your remote control, it may be the result of the computer’s screen-saver or power management software.
* If you accidentally hit the POWER button on the remote control, wait 60 seconds and then press the POWER button again to resume.
NOTE: If using video, S-video, or audio cables, the cables should be 3 m (9.8 feet) or shorter.
For LT158:
When Viewing a DVI Digital Signal:
To project a DVI digital signal, be sure to connect the PC and the projector using the supplied DVI-D signal cable before turning on your PC or
projector. Turn on the projector first and select DVI (DIGITAL) from the source menu before turning on your PC.
Failure to do so many not activate the digital output of the graphics card resulting in no picture being displayed. Should this happen, restart your PC.
Do not disconnect the supplied DVI-D signal cable while the projector is running. If the signal cable has been disconnected and then re-connected,
an image may not be correctly displayed. Should this happen, restart your PC.
NOTE: Some personal computers or video cards may not display images correctly on the LT158.
To connect a DVI connector on your computer to LT158, attach the supplied DVI-D – DVI-D signal cable to the DVI connector on the projector. If you use a separately
sold DVI cable, images may not be correctly displayed.
NOTE: The DVI connector can accept a maximum resolution of 1024x768(XGA) when a DVI (DIGITAL) input is selected.
PC CONTROLVIDEO S-VIDEO RGB AUDIO
DVI
LT158
Wiring Diagram
RGB Signal cable (supplied)To mini D-Sub 15-pin connector on
the projector. It is recommended that
you use a commercially available
distribution amplifier if connecting a
signal cable longer than the one
supplied.
For LT158:
DVI-D – DVI-D signal cable
(supplied) or DVI-A – VGA
signal cable (supplied)
To DVI connector on the projector.
IBM VGA or Compatibles(Desktop type or notebook type)DVD Player (with component output)
Component Video cable
RCA
3 (not supplied)
Document CameraTo video, S-video, and audio
inputs on the projector. VCR, DVD Player or
LaserDisc Player
Macintosh or Compatibles
(Desktop type or notebook type)
Optional 15-pin-to-RCA
(female)
3 cable (ADP-CV1)
DVI-A – VGA signal
cable (supplied)
Gender changer
mini D-sub 15-pin F –
15-pin F (not supplied) 
						

							E – 19
C
 
C
A
R
D
P
C
 
C
O
N
T
R
O
LV
I
D
E
OD
V
I
-
DU
S
BS
-
V
I
D
E
OA
U
D
I
O
MENUENTERCANCELSELECT
POWERSTATUS ON
/STAND BYSOURCE
AUTO 
ADJUST
PC  CARD 
ACCESSA
C  IN
E
O
D
V
I-DS
-V
ID
E
O
A
U
D
IODVI
AUDIO
MENUENTERCANCELSELECT
POWER STATUS ON
/STAND BYSOURCE
AUTO
 
ADJUST
PC  CARD 
ACCESSA
C
  INC
 
C
A
R
D
P
C
 
C
O
N
T
R
O
LV
I
D
E
OR
G
BU
S
BS
-
V
I
D
E
OA
U
D
I
O
RGB
S-VIDEO
AUDIO DEORGB INPUT
AUDIO
Audio cable (not supplied)
Connecting Your PC
Connecting your PC to your LT157 (XGA) projector will enable you to project your computer’s screen image for an impressive presentation.
To connect to a PC, simply:
1. Turn off the power to your projector and computer.
2. Use the supplied signal cable to connect your PC to the projector.
3. Turn on the projector and the computer.
4. If the projector goes blank after a period of inactivity, it may be caused by a screen saver installed on the computer you’ve connected to the
projector.RGB signal cable (supplied)
To mini D-Sub 15-pin connector on the
projector. It is recommended that you
use a commercially available
distribution amplifier if connecting a
signal cable longer than the one
supplied .
Audio cable (not supplied)DVI-D – DVI-D signal cable
(supplied)
To DVI connector on the projector.
DVI-A – VGA signal cable
(supplied)
IBM VGA or Compatibles
IBM VGA or Compatibles
Connecting Your PC with a DVI Connector
You can connect your PC with a DVI output to your LT158 (XGA) projector.
When connecting a PC with a D-sub 15 pin analog connector, attach the supplied DVI-A – VGA signal cable to the D-sub 15 pin connector of your
PC.
To connect to a PC, simply:
1. Turn off the power to your projector and computer.
2. Use the supplied DVI-D–DVI-D signal cable to connect a DVI connector of your PC to the projector.
➁ To connect a PC with a mini D-sub 15 pin- mini D-sub 15 pin connector, attach the supplied DVI-A – VGA signal cable to the DVI connector on
the projector.
3. Turn on the projector and the computer.
4. If the projector goes blank after a period of inactivity, it may be caused by a screen saver installed on the computer you’ve connected to the
projector.Mini D-Sub 15 pin connector
LT157
LT158 DVI connector 
Mini D-Sub 15
pin connector ➁
Connection Option  when using DVI output.
Connection Option ➁ when using mini D-Sub 15 pin output. 
						

							E – 20
C
 
C
A
R
D
P
C
 
C
O
N
T
R
O
LV
I
D
E
OD
V
I
-
DU
S
BS
-
V
I
D
E
OA
U
D
I
O
MENUENTERCANCELSELECT
POWER STATUS ON
/STAND BYSOURCE
AUTO
 
ADJUST
PC  CARD 
ACCESSA
C
  IN
EO
DVI-DS-VIDEO
AUDIODVI
AUDIO
MENUENTERCANCELSELECT
POWER STATUS ON
/STAND BYSOURCE
AUTO
 
ADJUST
PC  CARD 
ACCESSAC
  INC
 
C
A
R
D
P
C
 
C
O
N
T
R
O
LV
I
D
E
OR
G
BU
S
BS
-
V
I
D
E
OA
U
D
I
O
RGB
S-VIDEO
AUDIO DEORGB INPUT
AUDIORGB signal cable (supplied)
Audio cable (not supplied)
1ON
DIP
23456
Pin adapter for Macintosh
(not supplied)
For older Macintosh, use a commercially
available pin adapter to connect to your
Macs video port.
Connecting Your Macintosh Computer
Macintosh (Desktop type)
Audio cable (not supplied)
DVI-A – VGA signal cable
(supplied)
To connect to a Macintosh, simply:
1. Turn off the power to your projector and your Macintosh computer.
2. Use the supplied signal cable to connect your Macintosh computer to the
projector.
3. Turn on the projector and the Macintosh computer.
For LT158:
When connecting a Macintosh with a mini D-sub 15 pin analog connector,
attach the supplied DVI-A – VGA signal cable to the DVI connector on the
projector.
Macintosh (Notebook type)
LT157
LT158 
						

							E – 21
Connecting Your DVD Player
LT157
MENUENTERCANCELSELECT
POWER STATUS ON
/STAND BY
SOURCE
AUTO
 
ADJUST
PC  CARD 
ACCESS
A
C
  
I
N
C CARD
PC CONTROLVIDEO
RGBUSBS-VIDEO
AUDIO
R
G
B
S
-V
ID
E
OA
U
D
IO D
E
ORGB INPUT
R     L
Y     Cb     Cr
R     L AUDIOComponent
AUDIO
You can connect your projector to a DVD player with component out-
puts or Video output. To do so, simply:
1. Turn off the power to your projector and DVD player.
2. If your DVD player has the component video (Y/Cb/Cr) output, use a
commercially available component video cable (RCA
3) and the
optional 15-pin-to-RCA (female)
3 cable to connect your DVD player
to the RGB INPUT connector on the projector.
For a DVD player without component video (Y/Cb/Cr) outputs, use
common RCA cables (not provided) to connect a composite VIDEO
output of the DVD player to the Video Input of the projector.
3. Turn on the projector and DVD player.
NOTE: Refer to your DVD player’s owner’s manual for more information aboutyour DVD player’s video output requirements,
Optional 15-pin-to-RCA (female)
3
cable (ADP-CV1)
Audio cable
(not supplied)
DVD player
White
Red
Y
Cb
Cr
White
RedAudio Equipment Component video cable
RCA
3 (not supplied)
MENUENTERCANCELS
E
L
E
C
T
P
O
W
E
R S
T
A
T
U
S O
N
/S
T
A
N
D
 
B
Y
S
O
U
R
C
E
A
U
T
O 
A
D
J
U
S
T
P
C
 
 
C
A
R
D
 
A
C
C
E
S
S
AC  IN
C
 
C
A
R
D
P
C
 
C
O
N
T
R
O
LV
I
D
E
OR
G
BU
S
BS
-
V
I
D
E
OA
U
D
I
O
EO
DVI-DS-VIDEO
AUDIODVI-D
AUDIO
DVI-A – VGA
signal cable
(supplied)
LT158
For LT158:
Attach the supplied DVI-A–VGA cable to the DVI connector on your
projector.
To connect a DVD player (component), a commercially available gen-
der changer (Mini D-Sub 15p F-15p F) is required as well as ADP-
CV1. Optional 15-pin-to-
RCA (female)
3
cable
(ADP-CV1)
Gender changer
mini D-Sub 15p F
– 15p F
(not supplied) 
						

							E – 22
MENUENTERCANCELSELECT
POWER STATUS ON
/STAND BY
SOURCE
AUTO
 
ADJUST
PC  CARD 
ACCESS
A
C
 
 
I
N
C CARD
PC CONTROLVIDEO
RGBUSBS-VIDEO
AUDIO
RGB
S-VIDEO
PC CONTROLVIDEO
USBS-VIDEO
VIDEO
R     LS-VIDEO
AUDIO
R        L AUDIO
VIDEO
VCR/ Laser disc player
S-video cable (not supplied)
Audio equipment
Connecting Your VCR or Laser Disc Player
Use common RCA cables (not provided) to connect your VCR, laser disc player or document camera to your projector.
To make these connections, simply:
1. Turn off the power to the projector and VCR, laser disc player or document camera.
2. Connect one end of your RCA cable to the video output connector on the back of your VCR or laser disc player, connect the other end to the Video
input on your projector. Use an audio cable (not supplied) to connect the audio from your VCR or laser disc player to your audio equipment (if your
VCR or laser disc player has this capability). Be careful to keep your right and left channel connections correct for stereo sound.
3. Turn on the projector and the VCR or laser disc player.
NOTE: Refer to your VCR or laser disc player owner’s manual for more information about your equipment’s video output requirements.
Audio cable(not supplied)
Video cable(not supplied)
Document camera 
						

							E – 23
About Startup screen
(Menu Language Select screen)
When you first turn on the projector, you will get the Star tup screen.
This screen gives you the opportunity to select one of the seven menu
languages: English, German, French, Itilan, Spanish,Swedish and Japa-
nese.
To select a menu language, follow these steps:
1. Use the Select 
 or  button to select one of the seven languages
for the menu.
2. Press the Enter button to execute the selection.
3. The Basic/Custom menu will be displayed in the language you
have selected.
To close the menu, press the Cancel button.
After this has been done, you can proceed to the advanced menu op-
eration.
If you want, you can select the menu language later. See “Language”
on page E-36. 
						

							E – 24
3. OPERATION
Connecting the Power Cable and Turning on the
Projector
Before you turn on your projector, ensure that the computer or video
source is turned on and that your lens cap is removed.
1.Connect the supplied power cable to the projector.
MENUENTERCANCEL
SELECT
POWE
RSTATUS ON/STAND BYSOURCE
AUTO
 
ADJUST
PC  CARD 
ACCESS
A
C
  IN
C CARD
USBPC CONTROLVIDEO S-VIDEO RGB AUDIO
Plug the supplied power cable in the wall outlet. The projector will
go into its standby mode and the power indicator will glow orange.
2.Turn on and off the Projector
MENU
OFF
VIDEO
AUTO ADJ.
S-VIDEO RGB1 RGB2
LASERON
POWERPower ON button
MEN
ENTER
CANCELSELECT
POWERSTATUS ON
/STAND BY
SOURCE
AUTO  
ADJUST
PC  CARD 
ACCESS
PC CONTROLVIDEO
S-VIDEOPower ON/STAND BY button
Indicator
To turn on the projector:
Only after you press the “On” button on the remote control (“ON/
STAND BY” button on the projector cabinet) will the power indicator
turn to green and the projector become ready to use.
NOTE: To turn the projector on by plugging in the power cable, use themenu and enable the “Auto Start” feature. (See page E-38.)
NOTE: Immediately after turning on the projector, screen flicker may occur.This is not a fault. Wait 3 to 5 minutes until the lamp lighting is stabilized.
To turn off the projector:
First press the “off” button on the remote control (“ON/STAND BY”
button on the projector cabinet) for a minimum of two seconds. The
power indicator will glow orange. After the projector turns off, the
cooling fans keep operating for one minute.
NOTE: Do not disconnect the power cable during this time. Then, unplugthe power cable. The power indicator will go out.
Status of indicator light: turn on
POWER STATUSPOWER STATUS
ON/
STAND BYPOWER STATUS
Normal mode:
stand by
steady orange light
flashing green light
for one minutesteady green light
Eco mode:
POWER STATUS
POWER STATUS
POWER STATUS
ON/
STAND BY
stand by
steady orange light
flashing green light
for one minute
(Normal mode)steady green light
(Eco mode)
Status of indicator light: turn off
ON/
STAND BY
POWERPOWER
POWER
ON
steady green light
change to flashing
green lightsteady orange light cooling down stand byPress a minimum
of two seconds. 
						

							E – 25
3.Adjust a Projected Image
Select the Computer or Video Source
VIDEO S-VIDEO RGB1RGB2
PC CARD
ENTER
CANCELSELECT
ON
/STAND BY
SOURCE
AUTO 
ADJUST
Press the Source button on the remote control or the projector cabinet
to select “Video” (VCR, document camera, or laser disc player), S-
Video”, “RGB” (computer or DVD with component output) [ “DVI digital”
, “DVI analog” (computer with DVI output: LT158 only)] or “PC Card
Viewer” (slides on a CompactFlash card) to display the image.
Or press the “Menu” button on the remote control or the cabinet and
use the menu to select your video source: “Video”, “S-Video”, “RGB
(DVI on LT158)” or “PC Card Viewer”.
NOTE: If no input signal is available, the projector will display a blue back-ground (factory preset).
Adjust the Image Size and the Focus
Use the Zoom lever to fine adjust the image size on the screen
Use the Focus ring to obtain the best focus.
Place your projector on a flat
level surface and ensure that the
projector is square to the screen.Lift the front edge of the projector to
center the image vertically.
Move the projector left to center
the image horizontally on the
screen.
Rotate the rear foot to make the
image square to the screen.
Use keystone correction for proper
adjustment. 
						

							E – 26
MENU
OFF
VIDEO
AUTO ADJ.
S-VIDEO RGB1 RGB2
LASERON
SC
POWER
[Poor picture]
[Normal picture] Adjust the Tilt Foot
1. Lift the front edge of the projector.
2. Press the Tilt button on the front of the projector to extend the ad-
justable tilt foot (maximum height).
MENUENTERCANCELS
E
L
E
C
T
P
O
W
E
R S
T
A
T
U
S O
N
/S
T
A
N
D
 
B
YS
O
U
R
C
E
A
U
T
O 
A
D
J
U
S
T
P
C
 
 
C
A
R
D
 
A
C
C
E
S
S
AC  IN
C CARD
USBPC CONTROLVIDEO
S-VIDEO
RGB
AUDIO
2
1
3. Press and hold the Tilt button.
4. Lower the front of the projector to the desired height and release the
button to lock the Adjustable tilt foot.
There is approximately 10 degrees of up and down adjustment for
the front of the projector.
Do not use the tilt-foot for purposes other than originally intended.
Misuses such as gripping the tilt-foot or hanging on the wall can cause
damage to the projector.
To fine-adjust the height of the rear foot, remove the spacer (black
rubber) and rotate the rear foot to the desired height.
* If the projected image does not appear square to the screen then
use keystone correction for proper adjustment.Adjust the Image Using Auto Adjust
The Auto Adjust function automatically optimizes the image in RGB
mode.
ENTER
CANCELSELECT
ON
/STAND BY
SOURCE
AUTO 
ADJUST
Press the Auto Adjust button to adjust Position-H/V and Pixel Clock/
Phase for an optimal picture. Some signals may not be displayed cor-
rectly or take time to switch between sources.
NOTE: For LT158
* The horizontal and vertical position adjustments to DVI digital signal are not
stored in memory on LT158.
* The Pixel Clock and Phase items are not available for a DVI digital signal on
LT158 (these adjustments are not necessary for this type of signal).
MENUENTERCANCELS
E
L
E
C
T
P
O
W
E
R S
T
A
T
U
S O
N
/S
TA
N
D
 B
YS
O
U
R
C
E
A
U
TO 
A
D
JU
S
T
P
C
  C
A
R
D
 
A
C
C
E
S
S
AC  IN
C CARD
USBPC C
ON
TRO
LVIDEOS-VIDEO
RGB AUDIO
3 4
ERC
POWER STATUS ON/STAND BYSOURCE
AUTO
 
ADJUST
PC  CARD 
ACCESS
GBAUDIO
max.min.
16mm SpacerUpDown