NEC LT170 Projector User Manual

							E-11
INSTALLATION AND CONNECTIONS
Lens Center
Throw Angle (α)
Throw Distance (
C) Screen center Screen Diagonal Screen Width
Screen Height
Screen Bottom
(
D)
(
B)
Distance Chart
B = Vertical distance between lens center and screen center
C = Throw distance
D = Vertical distance between lens center and top of screen (bottom of
screen for desktop)
α = Throw angle
NOTE: Distances may vary +/-5%.
Throw Distance and Screen Size
The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of installation.
Reflecting the Image
Using a mirror to reflect your projectors image enables you to enjoy a
much larger image. Contact your NEC dealer if you need a mirror. If youre
using a mirror and your image is inverted, use the MENU button and
SELECT dial on your projector cabinet or the MENU and the 

buttons on your remote control to correct the orientation. (See page E-
33.) WARNING
*Installing your projector on the ceiling must be done by a quali-
fied 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 projec-
tor 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.
α
Wide – Tele Screen Size B C
Wide – TeleDiagonal Width Heightdegree
9.7 - 8.7
9.5 - 8.7
9.5 - 8.6
9.5 - 8.6
9.4 - 8.6
9.4 - 8.6
9.4 - 8.6
9.4 - 8.6
9.4 - 8.6
9.4 - 8.6
9.4 - 8.5
9.4 - 8.5
9.4 - 8.5 Dmm
457
610
914
1021
1097
1219
1280
1372
1524
1829
2286
2743
3048mm
1070 - 1190
1450 - 1590
2190 - 2410
2450 - 2700
2640 - 2900
2930 - 3230
3080 - 3390
3300 - 3640
3680 - 4050
4420 - 4860
5530 - 6090
6650 - 7310
7390 - 8130 mm
183
244
366
408
439
487
512
548
609
731
914
1097
1219 mm
762
1016
1524
1702
1829
2032
2134
2286
2540
3048
3810
4572
5080mm
610
813
1219
1361
1463
1626
1707
1829
2032
2438
3048
3658
4064mm
46
61
92
102
110
122
128
137
153
183
229
275
305
α
Wide – Tele Screen Size B C
Wide – TeleDiagonal Width Heightdegree
9.7 - 8.7
9.5 - 8.7
9.5 - 8.6
9.5 - 8.6
9.4 - 8.6
9.4 - 8.6
9.4 - 8.6
9.4 - 8.6
9.4 - 8.6
9.4 - 8.6
9.4 - 8.5
9.4 - 8.5
9.4 - 8.5 Dinch
18
24
36
40
43
48
50
54
60
72
90
108
120inch
42 - 47
57 - 63
86 - 95
96 - 106
104 - 114
115 - 127
121 - 133
130 - 143
145 - 159
174 - 191
218 - 240
262 - 288
291 - 320 inch
7
10
14
16
17
19
20
22
24
29
36
43
48 inch
30
40
60
67
72
80
84
90
100
120
150
180
200inch
24
32
48
54
58
64
67
72
80
96
120
144
160inch
2
2
4
4
4
5
5
5
6
7
9
11
12 
						

							E-12
COMPUTER S-VIDEO IN
AUDIO IN
AC IN
VIDEO IN
COMPUTERAUDIO IN
PHONE
PHONE
Making Connections
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 cases
signal cannot be output from RGB output unless the notebook PC is turned on after connecting with the projector.
* If the screen goes blank while using your remote control, it may be the result of the computers 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.
Connecting Your PC or Macintosh Computer
Audio cable (not supplied)
IBM VGA or Compatibles (Notebook type)
or Macintosh (Notebook type) IBM PC or Compatibles (Desktop type)
or Macintosh (Desktop type)RGB signal cable (supplied)
To mini D-Sub 15-pin connector on the pro-
jector. It is recommended that you use a
commercially available distribution amplifier
if connecting a signal cable longer than the
supplied one.
NOTE: For older Macintosh,
use a commercially available
pin adapter (not supplied) to
connect to your Macs video
port.
Connecting your PC or Macintosh computer to your projector will enable you to project your computers screen image for an impressive presentation.
To connect to a PC or Macintosh, simply:
1. Turn off the power to your projector and computer.
2. Use the supplied signal cable to connect your PC or Macintosh 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 youve connected to the projector.
INSTALLATION AND CONNECTIONS 
						

							E-13
INSTALLATION AND CONNECTIONS
To connect SCART output (RGB)
Before connections: An exclusive SCART adapter (ADP-SC1) and a commercially available SCART cable are required for this connection.
NOTE: Audio signal is not available for this connection.
1. Turn off the power to the projector and your video equipment.
2. Use the NEC ADP-SC1 SCART adapter and a commercially available
SCART cable to connect the COMPUTER input of your projector and
a SCART output (RGB) of your video equipment.
3. Turn on the power to the projector and your video equipment.
4. Use the COMPUTER button on the remote control to select the COM-
PUTER input. Video equipment such as DVD playerProjector
ADP-SC1
Commercially available
SCART cableFemale
To COMPUTER connector
COMPUTER S-VIDEO IN
AUDIO IN
AC IN
VIDEO IN
COMPUTER
Using the projector in portrait mode
When connecting with a Tablet PC, you can display an image in portrait
mode with the projector on its side.
•Place the projector on a location such as a table with the terminal
panel side up.
•Be sure to place the projector on a flat level surface.
•Auto Keystone correction feature is not available.
•The on-screen menu will not be rotated.
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AUDIO INVIDEO IN
5. Press the MENU button on the remote control to display the menu.
6. From the menu, select [To Advanced Menu] 
→ [Setup 2]  → [Signal
Select Computer] → [Scart].
SCART is a standard European audio-visual connector for TVs, VCRs
and DVD players. It is also referred to as Euro-connector.
NOTE: The ADP-SC1 SCART adapter is obtainable from your NEC dealer in Eu-rope. Contact your NEC dealer in Europe for more information.
The projected image is displayed at a lower level than
the normal position. Adjust the projection angle and
position for the correct position of the projected image
on screen. •If the image is displayed upside down, select [Advanced menu] →
[Setup 1] → [Portrait] → [0°] or [180°] for display orientation of your
PC. See also page E-33 for Portrait. 
						

							E-14
AUDIO INLRAUDIO OUT
LR
Component
YCbCr
COMPUTER S-VIDEO IN
AUDIO IN
AC IN
VIDEO IN
COMPUTERAUDIO IN
INSTALLATION AND CONNECTIONS
Connecting Your DVD Player
DVD player
You can connect your projector to a DVD player with component output 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 COMPUTER input connector on the projector.
For a DVD player without component video (Y,Cb,Cr) output, 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 players owners manual for more information about your DVD players video output requirements.Component video RCA

3 cable
(not supplied)
Optional 15-pin-to-RCA
(female)
3 cable (ADP-CV1)
Audio cable
(not supplied) Audio Equipment 
						

							E-15
AUDIO INLRAUDIO OUTLRVIDEO OUTS-VIDEO VIDEO
COMPUTER S-VIDEO IN
AUDIO IN
AC IN
VIDEO IN
S-VIDEO INVIDEO IN
INSTALLATION AND CONNECTIONS
VCR/ Laser disc player
Connecting Your VCR or Laser Disc Player
Audio equipment S-Video cable (not supplied)
Video cable (not supplied)
Audio cable (not supplied)
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 owners manual for more information about your equipments video output requirements. 
						

							E-16
INSTALLATION AND CONNECTIONS
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STATUS
POWER
ON
/STA
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COMPUTER S-VIDEO IN AUDIO IN
VIDEO INP
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CLOSE
Attaching the Projector to a Tripod
The projector can be used with a camera tripod.
To attach the projector to a tripod, use the supplied tripod adapter.
CAUTION
Care should be taken in handling a tripod.
Using the tripod on an unstable surface may result in the
tripod falling over or the projector falling which may result
in damage to the projector and possible personal injury.
Read the instructions supplied with your tripod for handling
and cautions.
•Use a tripod that can fully support the weight of the pro-
jector (approximately 5.5 lb/2.5 kg including attachment).
•Place the tripod with its feet fully open and weight evenly
distributed for stability.
•When using a tripod with a geared elevator, do not ex-
tend the geared elevator.
•When displaying an image in portrait mode (with the
projector on its side) (page E-13), be sure the tripod is
balanced for stability. Failure to do so may result in the
tripod falling over.
Preparation:
1. Disconnect all the cables.
2. A flat-blade screwdriver is required for attaching the sup-
plied three (3) screws. Use the supplied flat-blade screw-
driver.
1. Turn the projector upside down.Place the projector on a soft cloth so as not to scratch the cabinet
surface.
2. Attach the supplied tripod adapter to the bottom of the
projector.
Secure the tripod adapter to the projector with the supplied (3) screws.
3. Attach the projector to the tripod.Open the tripod to a fully extended position for greatest stability.
4. Connect all the cables. 
						

							E-17
Connecting the Supplied Power Cable
Connect the supplied power cable to the projector.
First connect the supplied power cables two-pin plug to the AC IN of the
projector, and then connect the other plug of the supplied power cable in
the wall outlet.
INSTALLATION AND CONNECTIONS
ZOOMFOCUS
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LAMPMENU
STATUS
ON/STAND BY
POWERPOWERPOWER
The projector will go into its standby mode and the power indicator will
glow orange.
LAMPMENUSOURCEENTER
STATUS
ON/STAND BY
SELECT
POWERPOWERPOWER
CAUTION:
Do not unplug the power cable from the wall outlet under any one of the
following circumstances.
Doing so can cause damage to the projector:
*While the Hour Glass icon appears.
*While the cooling fans are running. (The cooling fans continue to work
for 60 seconds after the projector is turned off). 
						

							E-18
PROJECTING AN IMAGE (BASIC OPERATION)
This section describes how to turn on the projector and to project a pic-
ture onto the screen.
Turning on the ProjectorBefore you turn on your projector, ensure that the computer or video
source is turned on and that your lens shutter is open.
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NPUSH
CLOSE
Only after you press the POWER (ON/STAND BY) button on the projec-
tor cabinet or POWER ON button on the remote control for a minimum of
2 seconds will the power indicator turn to green and the projector be-
come ready to use.
LAMP
STATUS
POWER
ON/STAND BY
SELECT
MENUSOURCEENTER
OFFCOMPUTER
AUTO ADJ.P0WER ON
VIDEO
AUTO
ASPECT
COMP.S-VIDEO
ENTER
NOTE: To turn the projector on by plugging in the power cable, use the menu andenable the “Auto Start” feature. (See page E-33)
Note on Startup screen (Menu Language Select screen)
When you first turn on the projector, you will get the Startup screen. This
screen gives you the opportunity to select one of the 7 menu languages.
NOTE: If you want, you can select one of the 20 menu language later. See Lan-guage on page E-33.
To select a menu language, follow these steps:
1. Use the dial to select one of the 7 languages for the menu.
When using the remote control, keep pressing the  button several
times until your language is highlighted.
LAMP
STATUS
POWER
ON/STAND BY
SELECT
MENUSOURCEENTER
OFFCOMPUTER
AUTO ADJ.P0WER ON
VIDEO
AUTO
MENUCANCEL
ASPECT
COMP.S-VIDEO
ENTER
2. Press the ENTER button to execute the selection.
LAMP
STATUS
POWER
ON/STAND BY
SELECT
MENUSOURCEENTER
OFFCOMPUTER
AUTO ADJ.P0WER ON
VIDEO
AUTO
MENUCANCEL
ASPECT
COMP.S-VIDEO
ENTER
After this has been done, you can proceed to the menu operation.
NOTE: Immediately after turning on the projector, screen flicker may occur. Thisis not a malfunction. Wait 3 to 5 minutes until the lamp lighting is stabilized.
When the Lamp mode is set to Eco, the Lamp indicator will light green.
If one of the following things happens, the projector will not turn on.
*If the internal temperature of the projector is too high, the projector
detects abnormal high temperature. In this condition the projector will
not turn on to protect the internal system. If this happens, wait for the
projectors internal components to cool down.
*When the lamp reaches its end of usable life, the projector will not turn
on. If this happens, replace the lamp.
*If the lamp fails to light, and if the STATUS indicator flashes on and off
in a cycle of six times, wait a full minute and then turn on the power.
If one of the following things happen, the projector will mute a picture. If it
continues muting for 15 minutes, the projector will go into standby mode.
*Turning on the power with the lens shutter closed.
*Closing the lens shutter during operation.
*Directing the lens downward by more than 60° from level during
operation.
*Turning on the power with the lens directed down by more than 60°
from level. 
						

							E-19
Selecting a Source
Selecting the computer or video source
Press any one of the COMPUTER, VIDEO or
S-VIDEO buttons. Press and quickly release the SOURCE button on the projector cabinet
to display the Source list. Each time the SOURCE button is pressed,
each source name will be highlighted in sequence. Highlighting a source
name will display an hour glass icon in one second. After that the input
signal will be selected.
PROJECTING AN IMAGE (BASIC OPERATION)
OFFCOMPUTER
AUTO ADJ.
PC-MUTE MAGNIFY
P0WER ON
VIDEO
AUTO
MENU
HELP
MUTE
PICTURE
FREEZE
CANCEL
ASPECT
COMP.S-VIDEO
ENTER
Adjustable Tilt Foot Button Adjustable Tilt  Foot
NOTE: You can rotate the Fine Adjustment rings of both tilt feet on the left andright sides of the cabinet front for fine adjustment of the tilt feet.
Adjusting the Picture Size and PositionPlace 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.
*If the projected image does not appear square to the screen then use
the Keystone feature for proper adjustment. See page E-20.Move the projector left to center the image horizontally on the screen.
Adjust the Tilt Foot1. Lift the front part of the projector.
Push and hold the PUSH symbol of the Adjustable Tilt Foot button on
the front top of the projector to extend the adjustable tilt feet up to a
maximum height.
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COMPUTER S-VIDEO IN AUDIO IN
VIDEO INPUSH
CLOSE
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4
Using the cabinet buttons
NOTE: If no input signal is available, the projector will display a blue background(factory preset).
LAMP
STATUS
POWER
ON/STAND BY
SELECT
MENUSOURCEENTER
Using the Remote Control
2. Lower the front of the projector to the desired height (max. 40mm/1.6”)
and release the Adjustable Tilt Foot Button to lock the Adjustable tilt
foot. There is approximately 10 degrees of up and down adjustment
for the front of the projector.
CAUTION:
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. 
						

							E-20
You can use the ZOOM ring to enlarge or reduce an image size.
Focus
Use the FOCUS ring to obtain the best focus.
Correcting the Vertical Keystone Distortion
Auto Keystone Correction
The Auto Keystone correction feature will correct the vertical distortion of
a projected image on the screen. No special operation required. Just put
the projector on a flat surface.
Note that the vertical keystone angle can be corrected between 30 de-
grees upward and 30 degrees downward of projector tilt from level.
NOTE: Keystone correction angle could be less than 30 degrees for some signalsthat have a high resolution or frequency such as UXGA.
Manual Keystone Correction
You can also correct the vertical keystone distortion manually.
To  do so:
1. Press the MENU button.
The menu will be displayed.
PROJECTING AN IMAGE (BASIC OPERATION)
ZOOMFOCUS
PUSH
ZOOMFOCUS
PUSH
2. Select the Keystone function. Rotate the SELECT +/- dial to select
“Keystone” and then press the ENTER button.
The three options will be displayed.
3. Rotate the SELECT +/- dial to select “Manual” and then press the
ENTER button.
The Keystone adjustment bar will be displayed.
4. Correct the ver tical distortion.
Rotate the SELECT +/– dial to correct the vertical keystone distor-
tion.
5. Press the ENTER button to take effect.
6. Press the MENU button to close the menu.
NOTE:
•You can save the changes by selecting “Manual (Save)” when you turn off the
projector.
•When you use the projector in portrait mode, vertical keystone distortion
looks horizontal keystone distortion.
Zoom
Use the ZOOM ring to finely adjust the image size on the screen.