NEC LT170 Projector User Manual

							E-31
USING ON-SCREEN MENU
Menu Descriptions & Functions
Basic Menu
[Auto Adjust Executed]
Optimizing RGB image automatically. (See page E-21)
Selecting Aspect Ratio [Aspect Ratio]
Aspect Ratio allows you to select the best Aspect mode to display your
source image. You can also display the Aspect Ratio window by pressing
the “ASPECT” button on the remote control. (See page E-8).
Normal Wide Zoom Cinema Native
Standard
4:3 AspectLeft and right
stretchedLeft and right
stretched
When 16:9 is selected from the source (i.e. DVD player), the follow-
ing selections will display:
Normal Wide Zoom Cinema Native
16:9 image
displayed in
4:3 modeLeft and right
stretchedLeft and right
stretched to
display the true
aspect When 4:3 is selected from the source (i.e. DVD player), the following
selections will display:Native (COMPUTER only): Turns off the Advanced AccuBlend fea-
ture. The projector displays the current image in its true resolution.
NOTE:
*While you are displaying an image with higher resolution than the projector’s
native resolution, “Native” is not available.
*Selecting “Cinema” will display the Cinema Position slide bar which allows
you to adjust the vertical position of the image on the screen.
Copyright
Please note that using this projector for the purpose of commercial gain or the
attraction of public attention in a venue such as a coffee shop or hotel and
employing compression or expansion of the screen image with a Aspect Ra-
tio setting may raise concern about the infringement of copyrights which are
protected by copyright law.
[Picture Management]
This option allows you to adjust neutral tint for yellow, cyan or magenta.
There are 5 factory presets optimized for various types of images, or you
can set user adjustable settings.
Presentation ..Recommended for making a presentation using a
PowerPoint file
Video .............Recommended for regular picture such as TV program
Movie ............. Recommended for movie
Graphic .......... Recommended for graphics
sRGB ............. Standard color values
User ............... User adjustable
NOTE: When “sRGB”, “Graphic”, “Video” or “Movie” is selected, the bright-
ness decreases slightly when compared to “Presentation”. This is not a mal-
function.
User Setting (when using User)
When selecting a user adjustable preset (User Setting), the submenu
will be displayed.
You can customize each gamma or color. To do so, first select “User
Setting” and press the ENTER button, and then proceed with the fol-
lowing steps.
Selecting Base Setting [Base setting]
This feature allows you to use white balance or gamma values as
reference data to optimize for various types of images. You can select
one of the following five settings.
• Presentation
• Video
• Movie
• Graphic
• sRGB
Selecting Gamma Correction Mode [Gamma Correction]
Each mode is recommended for :
Dynamic ......... For true color reproduction of natural tones
Natural ........... Normal settings
Black Detail .... For dark portions of a picture 
						

							E-32
USING ON-SCREEN MENU
Advanced Menu
[Image]
Enabling Auto Adjust [Auto Adjust]
When “Auto Adjust” is set to “On”, the projector automatically determines
the best resolution for the current RGB input signal to project an image
using NEC’s Advanced AccuBlend Intelligent Pixel Blending Technology.
The image can be automatically adjusted for position and stability;
“Horizontal Position”, “Vertical Position”, “Clock” and “Phase”.
On.................. Automatically adjusts image “Horizontal Position”, “Ver-
tical Position”, “Clock” and “Phase”.
Off .................. User can adjust the image display functions (“Horizon-
tal Position”, “Vertical Position”, “Clock” and “Phase”)
manually.
Adjusting Position/Clock (when Auto Adjust is off)
This allows you to manually adjust the image horizontally and vertically,
and adjust Clock and Phase.
[Horizontal/Vertical]
Adjusts the image location horizontally and vertically.
This adjustment is made automatically when the Auto Adjust is turned
on.
[Clock]
Use this item with the “Auto Adjust off ” to fine tune the computer im-
age or to remove any ver tical banding that might appear. This function
adjusts the clock frequencies that eliminate the horizontal banding in
the image. This adjustment may be necessary when you connect your
computer for the first time. This adjustment is made automatically when
the Auto Adjust is turned on.
[Phase]
Use this item to adjust the clock phase or to reduce video noise, dot
interference or cross talk. (This is evident when part of your image
appears to be shimmering.)
Use “Phase” only after the “Clock” is complete.
This adjustment is made automatically when the Auto Adjust is turned
on.
Turning On Noise Reduction [Noise Reduction]
Reduces video noise.
NOTE: The lower the Noise Reduction level, the better the image quality by wayof higher video bandwidth.
Turning On Flicker Reduction [Flicker Reduction]
Reduces flicker which can occur in an interlaced signal.
NOTE: When the Flicker Reduction is ON, jagged lines can be visible dependingon the signal. In that case, select OFF.
Adjusting White Balance [Brightness R/G/B, Contrast R/G/B]
This allows you to adjust the white balance. Brightness for each color
(RGB) is used to adjust the black level of the screen; Contrast for each
color (RGB) to adjust the white level of the screen.
Selecting White Peaking [White Peaking]
Adjust the brightness of the white areas. As the picture becomes dim,
it looks more natural.
NOTE: The White Peaking option is not available when “Presentation” is selectedin “Base Setting”.
[Brightness]
Adjusts the brightness level or the back raster intensity.
[Contrast]
Adjusts the intensity of the image according to the incoming signal.
[Sharpness]
Controls the detail of the image for Video.
[Color]
Increases or decreases the color saturation level (not valid for RGB).
[Hue]
Varies the color level from +/- green to +/-blue. The red level is used as
reference. This adjustment is only valid for Video and Component inputs
(not valid for RGB).
NOTE: Some Picture items cannot be available depending on the input signal.
Input signal Brightness Contrast Sharpness Color Hue
RGB
Yes Yes Yes No No
(Computer)
Component
Yes Yes Yes Yes*
1No(Computer)
Video and S-Video Yes Yes Yes Yes Yes*2
Yes: Available  No: Not available
*
1Available on DVD (15 kHz), but not available on HDTV, 525p (480p)
and 750p (720p).
*
2Available on NTSC only.
Correcting Vertical Keystone Distortion [Keystone]
Corrects vertical keystone distortion.
Auto ...............Corrects vertical keystone distortion automatically. See
page E-20.
Manual ........... Allows you to manually correct vertical keystone dis-
tor tion.
Manual  (Save) This option enables you to save your current keystone
correction settings. The settings are saved when you
turn off the projector.
When you select “Manual” or “Manual (Save)“, you can correct keystone
distortion using the Keystone slide bar. 
						

							E-33
USING ON-SCREEN MENU
[Setup1]
Selecting Lamp Mode [Lamp Mode]
This feature enables you to select two brightness modes of the lamp:
Normal and Eco modes. The lamp life can be extended by using the
Eco mode.
Normal Mode ...This is the default setting (100% Brightness).
Eco  Mode ...... Select this mode to increase the lamp life (80% Bright-
ness).
NOTE: Thermometer symbol  indicates the lamp mode is forcibly set to Ecomode because the internal temperature is too high.
Selecting Menu Language [Language]
You can choose one of 20 languages for on-screen instructions.
Selecting Menu Color [Menu Color Select]
You can choose between two color modes for menu color: color and
monochrome.
Selecting Menu Display Time [Menu Display Time]
This option allows you to select how long the projector waits after the
last touch of a button to turn off the menu.
The preset choices are “Manual”, “Auto 5 sec”, “Auto 15 sec”, and
“Auto 45 sec”. The “Auto 45 sec” is the factory preset.
Selecting a Color or Logo for Background [Background]
Use this feature to display a black/ blue screen or logo when no signal
is available.
Selecting Projector Orientation [Orientation]
This sets the orientation of the image for your type of application. The
options are:
desktop front projection, ceiling rear projection, desktop rear projec-
tion, and ceiling front projection.
Disabling the Cabinet Buttons [Cabinet Button]
This option turns on or off the Cabinet Button Lock function.
NOTE:
*This Cabinet Button Lock does not affect the remote control functions.
*When the cabinet buttons are locked, pressing and holding the MENU button
for about 10 seconds will change the setting to unlock.
*Key symbol  indicates the Cabinet Button is locked.
Enabling Security function [Security]
This option allows you to prevent the projector from being used by
unauthorized individuals.
See page E-24 for details.
Selecting Display Orientation [Portrait]
This allows you to select the projectors display orientation when you
display an image in portrait mode with the projector on its side. See
page E-13. You can rotate the projected image 0° or 180° clockwise
depending on your PC.
The default setting is 180°.
[Setup2]
Enabling Power Management [Power Management]
When this option is on and there is no input for five minutes or more,
the projector will automatically turn itself off.
Enabling Auto Start [Auto Start]
Turns the projector on automatically when the power cable is inserted
into an active power outlet.
This eliminates the need to always use the POWER (ON/STAND BY)
button on the projector cabinet or the POWER OFF button on the re-
mote control.
Enabling High Speed Fan Mode [Fan Mode]
This option allows you to select two modes for fan speed: High mode
and Auto mode.
High ............... The built-in fans run at a fixed high speed.
Auto ............... The built-in fans automatically run at a variable speed
according to the internal temperature.
When you wish to cool down the temperature inside the projector
quickly, select “High”.
NOTE: Select High Speed Fan mode if you continue to use the projector forconsecutive days.
Selecting Signal Format [Signal Select]

Allows you to choose “RGB” for an RGB source such as a computer,
or “Component” for a component video source such as a DVD player.
Normally select “RGB/Component” and the projector automatically
detects a component signal. However there may be some component
signals that the projector is unable to detect. If this is the case, select
“Component”. Select “Scart” for the European Scart.

This feature enables you to select composite video standards manu-
ally. Normally select “Auto”.
When you select the video standard for Video and S-Video, select the
video standard from the pull-down menu.
This must be done for Video and S-Video respectively.     
						

							E-34
USING ON-SCREEN MENU
Displays the status of the current signal and lamp usage. This item has
four pages. The information included is as follows:
InformationDefault
Returning to Factory Default [Factory Default]
The Factory Default feature allows you to change adjustments and set-
ting to the factory preset for source except the following:

Resets the adjustments for the current signal to the factory preset levels.
The items that can be reset are: Brightness, Contrast, Color, Hue, Sharp-
ness, Aspect Ratio, Horizontal Position, Vertical Position, Clock, Phase
and Picture Management.

Reset all the adjustments and settings for all the signals to the factory
preset.
The items can be reset except Language, Security, Remaining Lamp
Time, Lamp Hour Meter and Projector Usage. To reset the lamp usage
time, see “Clear Lamp Hour Meter” .
Clearing Lamp Hour Meter [Clear Lamp Hour Meter]
Resets the lamp clock back to zero. Selecting this option displays submenu
for a confirmation.
NOTE: The projector will turn off and go into standby mode after 1600 hours (up
to 2100 hours in Eco mode) of service. If this happens, press the “HELP” button
on the remote control for ten seconds to reset the lamp clock back to zero. Do this
only after replacing the lamp.
*The progress indicator shows the percentage of remaining lamp life.
The value informs you of the amount of lamp usage. When the remain-
ing lamp time reaches 0, the Remaining Lamp Time bar indicator
changes from 0% to 100 Hours and starts counting down.
If the remaining lamp time reaches 0 hours, the projector will not turn
on regardless of whether the lamp mode is set to Normal or Eco. [Page 1]
Source Index
Horizontal Frequency
Vertical Frequency
Sync Polarity
[Page 2]
Signal Type
Video Type
Sync Type
Interlace[Page 3]
Remaining Lamp Time (%)*
Lamp Hour Meter (H)
Projector Usage
[Page 4]
Version (BIOS/Firmware/Data/GUI) 
						

							E-35
LAMPMENU
STATUS
POWER
ON/STAND BYL
A
M
PM
E
N
U
S
T
A
T
U
S
P
O
W
E
R
O
N
/S
T
A
N
D
 B
Y
MAINTENANCE
This section describes the simple maintenance procedures you should
follow to replace the lamp and clean the filter.
Replacing the LampAfter your lamp has been operating for 1500 hours (up to 2000 hours in
Eco mode) or longer, the LAMP indicator in the cabinet will blink red and
the message will appear. Even though the lamp may still be working,
replace it at 1500 (up to 2000 hours in Eco mode) hours to maintain
optimal projector performance.
CAUTION
•DO NOT TOUCH THE LAMP immediately after it has been used. It
will be extremely hot. Turn the projector off, wait 60 seconds, and
then unplug the power cable. Allow at least one hour for the lamp
to cool before handling.
•DO NOT REMOVE ANY SCREWS except the lamp cover screw
and the lamp case screw. You could receive an electric shock.
•The projector will turn off and go into stand by mode after 1600
(up to 2100 hours in Eco mode) hours of service. If this happens,
be sure to replace the lamp. If you continue to use the lamp after
1500 hours (up to 2000 hours in Eco mode) of use, the lamp bulb
may shatter, and pieces of glass may be scattered in the lamp
case. Do not touch them as the pieces of glass may cause injury.
If this happens, contact your NEC dealer for lamp replacement.
To replace the lamp:
NOTE: The replacement lamp comes with a flat-blade screwdriver. Use the screw-driver to remove the lamp cover and lamp housing.
1. Loosen the lamp cover screw until the screwdriver goes into a free-
wheeling condition. Press firmly and slide the lamp cover off. The lamp
cover screw is not removable.3. Insert a new lamp housing until the lamp housing is plugged into the
socket.
CAUTION
Do not use a lamp other than the NEC replacement lamp (LT70LP).
Order this from your NEC dealer.
Secure it in place with the screw.Be sure to tighten the screw.
4. Reattach the lamp cover.
Slide the lamp cover back until it snaps into place.
Tighten the lamp cover screw.
Be sure to tighten the screw.
2.Loosen the screw securing the lamp housing until the screwdriver goes
into a freewheeling condition. The screw is not removable.
Remove the lamp housing by pulling out the handle.
NOTE: There is an interlock on this case to prevent the risk of electrical shock.Do not attempt to circumvent this interlock.Catch
Interlock5. After you install a new lamp, select the menu 
→ [Default] → [Clear
Lamp Hour Meter] to reset the lamp usage hours.
NOTE: When the lamp exceeds 1600 hours (up to 2100 hours in Eco mode) of
service, the projector cannot turn on and the menu is not displayed. If this
happens, press the Help button on the remote control for a minimum of 10
seconds while in standby mode. When the lamp time clock is reset to zero, the
LAMP indicator goes out.
LAMSTATUSPOWER
ON/STAND
LAMPMENUSOURCEENTER
STATUS
POWER
ON/STAND BYSELECT
1
2
L
A
M
PM
E
N
U
E
NS
T
A
TU
S
P
O
W
E
R
O
N
/S
T
A
N
D
 B
YLAMPMENUSOENTESTATUS
POWER
ON/STAND BY
LAMPMENUSOURCEENTER
STATUS
POWER
ON/STAND BYSELECT 
						

							E-36
MAINTENANCE
1. Turn off 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.
Cleaning the Cabinet and the Lens
Z
O
O
MFO
C
U
SPUSH
LAMPMENU
S
O
U
R
C
EENTER
STATUS
POWER
ON/STAND BYSELECT
COMPUTER S-VIDEO IN
AUDIO INVIDEO IN
Z
O
O
MF
O
C
U
S
L
A
M
PM
E
N
USOURCEE
N
T
E
R
S
T
A
T
U
S
P
O
W
E
R
O
N
/S
T
A
N
D
 
B
YSELECT
C
O
M
P
U
T
E
R S
-
V
I
D
E
O
 
I
N A
U
D
I
O
 I
N
V
I
D
E
O
 I
NP
U
S
H
CLOSE 
						

							E-37
TROUBLESHOOTING
This section helps you resolve problems you may encounter while setting up or using the projector.
Power Indicator (POWER)
Indicator Condition
Projector Condition Note
Off
Blinking light
Steady lightGreen
Orange0.5 sec ON,
0.5 sec OFF
0.5 sec ON,
0.5 sec OFFThe main power is not supplied
The projector is getting ready
to turn on.
The projector is cooling down.
The projector is turned on.
The projector is in Standby. Green
Orange–
Wait for a moment.
Wait for a moment.
–
–
Indicator Condition
Projector Condition Note
Off
Blinking light
Steady lightRed
Green
Orange1 cycle (0.5 sec ON,
2.5 sec OFF)
2 cycle (0.5 sec ON,
0.5 sec OFF)
3 cycle (0.5 sec ON,
0.5 sec OFF)
4 cycle (0.5 sec ON,
0.5 sec OFF)
6 cycle (0.5 sec ON,
0.5 sec OFF)Normal
Lamp cover error or lamp
housing error
Temperature error
Power Failure
Fan error
Lamp error
Re-firing the lamp
Cabinet button is locked–
Replace the lamp cover or
lamp housing correctly.
The projector is overheated.
Move the projector to a cooler
location.
Power supply unit will not work cor-
rectly. Contact your dealer.
Fans will not work correctly.
Lamp fails to light. Wait a full
minute and then turn on again.
The projector is re-firing.
You have pressed cabinet but-
ton when Cabinet Button is
locked.
Status Indicator (STATUS)
Indicator Condition
Projector Condition Note
Off
Blinking light
Steady lightNormal
Lamp has reached its end of
life. Lamp replacement mes-
sage will be displayed.
Lamp has been used beyond
its limit. The projector will not
turn on until the lamp is re-
placed.
Lamp mode is set to Eco mode Red
Red
Green–
Replace the lamp.
Replace the lamp.
–
Lamp Indicator (LAMP) 
						

							E-38
TROUBLESHOOTING
Does not turn on
No picture
Image isn’t square to the
screen
Picture is blurred
Image is scrolling verti-
cally, horizontally or
both
Remote control does
not work
Indicator is lit or blink-
ing
Cross color in RGB
mode•Check that the power cable is plugged in and that the power button on the projector cabinet or the remote
control is on. See page E- 17.
•Check to see if the Cabinet Button Lock function is enabled.If this function is enabled, cancel it by pressing and
holding the MENU button on the cabinet for a minimum of 10 seconds or using the menu with the remote
control. See page E-33.
•Ensure that the lamp cover or lamp housing is installed correctly. See page E-35.
•Check to see if the projector has overheated or the lamp has reached the end of its usable life. If there is
insufficient ventilation around the projector or if the room where you’re presenting is particularly warm, move
the projector to a cooler location.
•Use the COMPUTER, VIDEO or S-VIDEO button on the remote control or the SOURCE button on the cabinet to
select your source (Computer, Video or S-Video). See page E-19.
•Ensure your cables are connected properly.
•Use menus to adjust the brightness and contrast. See page E-32.
•Open the lens shutter. See page E-18.
•Reset the settings or adjustments to factory preset levels using “Factory Default” in the menu. See page E-34.
•Enter your registered keyword if the Security function is enabled. See page E-24.
•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.
•Reposition the projector to improve its angle to the screen. See page E-19.
•Use the Keystone correction function to correct the trapezoid distortion. See page E-20.
•Adjust the focus. See page E-20.
•Reposition the projector to improve its angle to the screen. See page E-19.
•Ensure that the distance between the projector and screen is within the adjustment range of the lens. See page
E-11.
•Condensation may form on the lens if the projector is cold, brought into a warm place and is then turned on.
Should this happen, let the projector stand until there is no condensation on the lens.
•Use the COMPUTER, VIDEO or S-VIDEO button on the remote control or the SOURCE button on the cabinet to
select the source you want to input. See page E-19.
•Install new batteries. See page E-9.
•Make sure there are no obstacles between you and the projector.
•Stand within 22 feet (7 m) of the projector. See page E-9.
•See the Power/Status/Lamp Indicator on page E-37.
•If Auto Adjust is off, turn it on or adjust the image manually with Horizontal / Vertical / Clock / Phase in the
menu. See page E-32.
Problem Check These  Items
Common Problems & Solutions 
						

							E-39
SPECIFICATIONS
This section provides technical information about the LT170 Projectors performance
Model Number LT170
Optical
DMD Single Chip Digital Micromirror Device (DMD)
Resolution 1024
768 pixels native*, up to UXGA with Advanced AccuBlend
Lens Manual zoom and focus: F=2.0 (Wide)-2.13 (Tele), f=25.7 - 28.3mm
Lamp 145W
Image Size 30 - 200 inches (0.8 - 5.1 m) diagonal
Projection Distance 3.51 - 26.67 ft / 1.07 (Wide) - 8.13 m (Tele)
Projection Angle Tele : 8.6°/ Wide : 9.5°
Keystone Correction +/- 30 degrees electronic (auto)
Electrical
Inputs 1 RGB/Component (D-Sub 15 Pin), 1 S-Video (DIN 4 Pin), 1 Video (RCA), 1 Stereo Mini Audio
Video Compatibility NTSC, NTSC4.43, PAL, PAL-60, PAL-N, PAL-M, SECAM, HDTV: 1080i, 1080i/50Hz, 720p, 576p, 480p, 480i/60Hz
Scan Rate Horizontal: 15 kHz to 100 kHz (RGB: 24 kHz or over) / Vertical: 50 Hz to 120 Hz
Video Bandwidth RGB: 100 MHz (-3dB)
Color Reproduction 16.7 million colors simultaneously, Full color
Horizontal Resolution NTSC / NTSC4.43/PAL/PAL-M/PAL-N/PAL60: 540 TV lines
SECAM: 300 TV lines
YCbCr: 540 TV lines
RGB: 1024 dots (H)
768 dots (V)
External Control RS232, IR
Sync Compatibility Separate Sync / Composite Sync / Sync on G
Built-in Speaker 0.5W (monaural)
Power Requirement 100 - 240V AC, 50 / 60 Hz
Input Current 2A (Max.)
Power Consumption 196W(4W in Standby mode)
Mechanical
Installation Orientation Desktop/Front, Desktop/Rear, Ceiling/Front, Ceiling/Rear
Dimensions 4.8 (W)
3.3 (H)
11.0 (D)
123mm (W)
85mm (H)
280mm (D)
(not including protrusions)
Net Weight 3.9 lbs / 1.8 kg
Environmental Considerations
Operational Temperatures : 41° to 95°F (5° to 35°C), 20% to 80% humidity (non-condensing)
Storage Temperatures : 14° to 122°F (-10° to 50°C), 20% to 80% humidity (non-condensing)
Regulations UL Approved (UL 60950, CSA 60950)
Meets DOC Canada Class B requirements
Meets FCC Class B requirements
Meets AS/NZS CISPR 22 Class B
Meets EMC Directive (EN55022:1998, EN55024-1998, EN61000-3-2, EN61000-3-3)
Meets Low Voltage Directive (EN60950, TUV GS Approved)
For additional information visit:
US : http://www.necvisualsystems.com
Europe : http://www.nec-europe.com/
Global : http://www.nec-pj.com/
* Effective pixels are more than 99.99%.
The specifications are subject to change without notice. 
						

							E-40
APPENDIX
Cabinet Dimensions
Unit = mm (inch)
Mini D-Sub 15 Pin Connector
Pin Assignments of D-Sub COMPUTER Input Connector
Pin No. RGB Signal (Analog) YCbCr Signal
1Red Cr2Green or Sync on Green Y
3Blue Cb4Ground5Ground
6Red Ground Cr Ground7Green Ground Y Ground8Blue Ground Cb Ground
9No Connection10 Sync Signal Ground11 Scart Sync
12 Bi-directional DATA (SDA)13 Horizontal Sync or Composite Sync14 Vertical Sync
15 Data Clock
Signal Level
Video signal : 0.7Vp-p (Analog)
Sync signal : TTL level
51423
10
11 12 13 14 156 978
ZOOMFOCUS
PUSH
LAMPMENU
SOURCEENTER
STATUS
POWER
ON/STAND BY
SELECTCOMPUTER S-VIDEO IN
AUDIO IN
AC IN
VIDEO IN
CLOSE
280 (11.0)
88 (3.46)60 (2.36)
110 (4.33)
123 (4.84)2.8 (0.11)
286.5 (11.28)
Lens center
Lens center