NEC Lt280 Portable Projector Users Manual

							11
D
B
Cα
2. Installation and Connections
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.
Distance Chart
B = Vertical distance between lens center and screen center
C = Throw distance
D = Vertical distance between lens center and screen bottom (top of screen for ceiling application)
α = Throw angle
NOTE: Distances may vary +/-5%.
α
Wide – Tele
degree
––9.2
11.2 – 9.2
11.1 – 9.0
10.8 – 8.9
10.6 – 8.7
10.5 – 8.7
10.5 – 8.7
10.5 – 8.7
10.5 – 8.6
10.4 – 8.6
10.4 – 8.6
10.4 – 8.6
10.4 – 8.6
10.3 – 8.6
10.3 – 8.6
10.3 – 8.6
10.3 – 8.5
10.3 – 8.5 inch
13
15
18
24
36
43
48
50
54
60
72
90
108
120
126
144
162
180 Screen Size B C
Wide – TeleDDiagonal Width Heightinch
–– 28
27 – 33
33 – 41
45 – 55
69 – 84
83 – 102
93 – 113
98 – 119
105 – 128
117 – 142
141 – 171
176 – 214
212 – 257
236 – 286
248 – 301
284 – 344
320 – 387
356 – 431inch
-2
-2
-3
-3
-5
-6
-7
-7
-8
-8
-10
-13
-15
-17
-18
-20
-23
-25 inch
5
5
6
9
13
16
17
18
19
22
26
32
39
43
45
52
58
65 inch
21
25
30
40
60
72
80
84
90
100
120
150
180
200
210
240
270
300inch
17
20
24
32
48
58
64
67
72
80
96
120
144
160
168
192
216
240
LT380
α
Wide – Tele
degree
––9.2
11.2 – 9.2
11.1 – 9.0
10.8 – 8.9
10.6 – 8.7
10.5 – 8.7
10.5 – 8.7
10.5 – 8.7
10.5 – 8.6
10.4 – 8.6
10.4 – 8.6
10.4 – 8.6
10.4 – 8.6
10.3 – 8.6
10.3 – 8.6
10.3 – 8.6
10.3 – 8.5
10.3 – 8.5 mm
320
381
457
610
914
1097
1219
1280
1372
1524
1829
2286
2743
3048
3200
3658
4115
4572 Screen Size B C
Wide – TeleDDiagonal Width Heightmm
––710
690 – 850
840 – 1040
1150 – 1400
1750 – 2140
2120 – 2580
2360 – 2870
2480 – 3020
2660 – 3240
2970 – 3600
3570 – 4340
4480 – 5440
5390 – 6540
6000 – 7270
6300 – 7640
7210 – 8740
8120 – 9840
9030 – 10940mm
-45
-54
-64
-86
-129
-154
-171
-180
-193
-214
-257
-322
-386
-429
-450
-514
-579
-643 mm
115
137
164
219
329
394
438
460
493
548
657
821
986
1095
1150
1314
1479
1643 mm
533
635
762
1016
1524
1829
2032
2134
2286
2540
3048
3810
4572
5080
5334
6096
6858
7620mm
427
508
610
813
1219
1463
1626
1707
1829
2032
2438
3048
3658
4064
4267
4877
5486
6096 inch
21
25
30
40
60
72
80
84
90
100
120
150
180
200
210
240
270
300
α
Wide – Tele
degree
––10.0
12.1 – 10.0
11.9 – 9.8
11.8 – 9.8
11.7 – 9.6
11.6 – 9.6
11.6 – 9.6
11.6 – 9.6
11.6 – 9.6
11.6 – 9.6
11.5 – 9.6
11.5 – 9.5
11.5 – 9.5
11.5 – 9.5
11.5 – 9.5
11.5 – 9.5
11.5 – 9.5
11.5 – 9.5 inch
13
15
18
24
36
43
48
50
54
60
72
90
108
120
126
144
162
180 Screen Size B C
Wide – TeleDDiagonal Width Heightinch
–– 28
28 – 34
34 – 41
46 – 56
69 – 84
83 – 102
93 – 113
98 – 119
105 – 127
117 – 141
141 – 170
176 – 213
211 – 256
235 – 285
247 – 299
283 – 342
318 – 385
354 – 428inch
-1
-2
-2
-2
-4
-4
-5
-5
-6
-6
-7
-9
-11
-12
-13
-15
-17
-18 inch
5
6
7
10
14
17
19
20
21
24
29
36
43
48
50
57
64
72 inch
21
25
30
40
60
72
80
84
90
100
120
150
180
200
210
240
270
300inch
17
20
24
32
48
58
64
67
72
80
96
120
144
160
168
192
216
240
LT280
α
Wide – Tele
degree
––10.0
12.1 – 10.0
11.9 – 9.8
11.8 – 9.8
11.7 – 9.6
11.6 – 9.6
11.6 – 9.6
11.6 – 9.6
11.6 – 9.6
11.6 – 9.6
11.5 – 9.6
11.5 – 9.5
11.5 – 9.5
11.5 – 9.5
11.5 – 9.5
11.5 – 9.5
11.5 – 9.5
11.5 – 9.5 mm
320
381
457
610
914
1097
1219
1280
1372
1524
1829
2286
2743
3048
3200
3658
4115
4572 Screen Size B C
Wide – TeleDDiagonal Width Heightmm
––720
710 – 860
860 – 1050
1160 – 1410
1760 – 2140
2120 – 2580
2360 – 2870
2480 – 3010
2660 – 3230
2960 – 3590
3570 – 4320
4470 – 5410
5370 – 6510
5970 – 7230
6270 – 7600
7180 – 8690
8080 – 9780
8980 – 10870mm
-33
-39
-47
-62
-93
-112
-125
-131
-140
-156
-187
-234
-280
-311
-327
-374
-420
-467 mm
127
152
182
243
364
437
485
509
546
606
728
909
1091
1213
1273
1455
1637
1819 mm
533
635
762
1016
1524
1829
2032
2134
2286
2540
3048
3810
4572
5080
5334
6096
6858
7620mm
427
508
610
813
1219
1463
1626
1707
1829
2032
2438
3048
3658
4064
4267
4877
5486
6096 inch
21
25
30
40
60
72
80
84
90
100
120
150
180
200
210
240
270
300
Screen center
Lens center
Screen bottom 2.54”/64.5mm
Projector bottom 
						

							12
2. Installation and Connections
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 104˚F (40˚C). (Eco mode se-
lected automatically at 95° to 104°F/35° to 40°C. Op-
erational temperatures during use of wireless LAN
card: 41° to 95°F / 5° to 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 yourprojector so heat can dissipate. Do not cover the vents
on the side or the front of the projector.
Reflecting the Image
Using a mirror to reflect your projectors image enables
you to enjoy a much larger image when a smaller space
is required. Contact your NEC dealer if you need a mir-
ror system. If youre using a mirror system and your im-
age is inverted, use the MENU and SELECT buttons on
your projector cabinet or your remote control to correct
the orientation. (→ page 84) 
						

							13
PC CARDCOMPONENT INUSB LANAUDIO INCOMPUTER 3 IN
COMPUTER 1 IN COMPUTER 2 IN
PC CONTROLMONITOR OUT
AUDIO OUT S-VIDEO IN VIDEO INAUDIO INCb/Pb
L/MONO R YCr/Pr
AC IN
PHONE
COMPUTER 1 IN
COMPUTER 2 IN
AUDIO IN
2. Installation and Connections
 Making Connections
Connecting Your PC or Macintosh Computer
NOTE: When using with a notebook PC, be sure to connect the projector and notebook PC while the projector is in standby mode and
before turning on the power to the notebook PC.
In most cases the output signal from the notebook PC is not turned on unless connected to the projector before being powered up.
*If the screen goes blank while using your remote control, it may be the result of the computers screen-saver or power manage-
ment software.
Enabling the computer’s external display
Displaying an image on the notebook PC’s screen does not necessarily mean it outputs a signal to the projector.
When using a PC compatible laptop, a combination of function keys will enable/disable the external display.
Usually, the combination of the ‘Fn” key along with one of the 12 function keys gets the external display to come on or
off. For example, NEC laptops use Fn + F3, while Dell laptops use Fn + F8 key combinations to toggle through external
display selections.
VGA signal cable (supplied)
To mini D-Sub 15-pin connector on the projector. It is recom-
mended that you use a commercially available distribution
amplifier if connecting a signal cable longer than the supplied
one.Audio cable (not supplied)
IBM VGA or Compatibles (Notebook
type) or Macintosh (Notebook type)
NOTE: The COMPUTER 1 IN connector supports Plug
& Play (DDC2).
NOTE: The LT380/LT280 is not compatible with video decoded outputs of either the NEC ISS-6020 and ISS-6010 switchers.
NOTE: An image may not be displayed correctly when a Video or S-Video source is played back via a commercially available scan
converter.
This is because the projector will process a video signal as a computer signal at the default setting. In that case, do the following.
*When an image is displayed with the lower and upper black portion of the screen or a dark image is not displayed correctly:
Project an image to fill the screen and then press the AUTO ADJ button on the remote control or the AUTO ADJUST button on the
projector cabinet.
*When noise appears on the sides of the screen:
Use the Overscan feature to display the image correctly.
Be sure to change the Overscan to 0% before pressing the AUTO ADJ or AUTO ADJUST button, otherwise an image may be
displayed with its sides cut off.
NOTE: For older Macintosh, use a commercially
available pin adapter (not supplied) to connect to
your Macs video port. 
						

							14
PC CARDCOMPONENT INUSB LANAUDIO INCOMPUTER 3 IN
COMPUTER 1 IN COMPUTER 2 IN
PC CONTROLMONITOR OUT
AUDIO OUT S-VIDEO IN VIDEO INAUDIO INCb/Pb
L/MONO R YCr/Pr
AC IN
COMPUTER 3 IN
PHONE
AUDIO IN
2. Installation and Connections
When Viewing a DVI Digital Signal (LT380 only)
To project a DVI digital signal, be sure to connect the PC and the projector using a DVI-D signal cable (not supplied)
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 may 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 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:
•Use a DVI-D cable compliant with DDWG (Digital Display Working Group) DVI (Digital Visual Interface) revision 1.0 standard. The
DVI-D cable should be within 10 m (394) long.
•The DVI (DIGITAL) connector (COMPUTER 3) accepts VGA (640x480), SVGA (800x600), 1152x864, XGA (1024x768) and SXGA
(1280x1024 @ up to 60Hz).
DVI-D cableAudio cable (not supplied)
IBM VGA or Compatibles or Macintosh(DVI-D connector with HDCP)
What is HDCP/HDCP technology?
HDCP is an acronym for High-bandwidth Digital Content Protection. High bandwidth Digital Content Protection (HDCP)
is a system for preventing illegal copying of video data sent over a Digital Visual Interface (DVI).
If you are unable to view material via the DVI input, this does not necessarily mean the projector is not functioning
properly. With the implementation of HDCP, there may be cases in which certain content is protected with HDCP and
might not be displayed due to the decision/intention of the HDCP community (Digital Content Protection, LLC). 
						

							15
2. Installation and Connections
PC CARDCOMPONENT INUSB LANAUDIO INCOMPUTER 3 IN
COMPUTER 1 IN COMPUTER 2 IN
PC CONTROLMONITOR OUT
AUDIO OUT S-VIDEO IN VIDEO INAUDIO INCb/Pb
L/MONO R YCr/Pr
AC IN
COMPUTER 1 IN
Before connections: An exclusive SCART adapter (ADP-SC1) and a commercially available SCART cable are re-
quired for this connection.
From the menu, select [Setup] → [Options] → [Signal Select] → [Computer 1] → [Scart].
SCART is a standard European audio-visual connector for TVs, VCRs and DVD players. It is also referred to as Euro-
connector.
NOTE: Audio signal is not available for this connection.
TIP: The ADP-SC1 SCART adapter is obtainable from your NEC dealer in Europe. Contact your NEC dealer in Europe for more
information.
To connect SCART output (RGB)
Video equipment such as DVD player
Commercially available SCART cable
Female
ADP-SC1
Projector 
						

							16
AUDIO
IN
PC CARDCOMPONENT INUSB LANAUDIO INCOMPUTER 3 IN
COMPUTER 1 IN COMPUTER 2 IN
PC CONTROLMONITOR OUT
AUDIO OUT S-VIDEO IN VIDEO INAUDIO INCb/Pb
L/MONO R YCr/Pr
AC IN
AUDIO OUT
PHONE
MONITOR OUT
2. Installation and Connections
Connecting an External Monitor
You can connect a separate, external monitor to your projector to simultaneously view on a monitor the RGB analog
image youre projecting.
NOTE:
•The MONITOR OUT connector will output no sound when the projector is in standby mode.
•The MONITOR OUT connector will output no signal when [Power-saving] is selected in [Standby Mode] from the menu.
•When the projector is in the standby mode, the image may not be correctly displayed while the cooling fans are running immedi-
ately after turning on or off the power.
•The AUDIO OUT jack cannot be used as a headphone jack.
•Output sound level can be adjusted in accordance with the sound level.
•When audio equipment is connected, the projector speaker is disabled.
•Daisy chain connection is not possible.
VGA signal cable (supplied)
VGA signal cable (not supplied)
Audio cable (not supplied)
Audio cable (not supplied) 
						

							17
AUDIO INLRAUDIO OUT
LR
Component
YCbCr
PC CARDCOMPONENT INUSB LANAUDIO INCOMPUTER 3 IN
COMPUTER 1 IN COMPUTER 2 IN
PC CONTROLMONITOR OUT
AUDIO OUT S-VIDEO IN VIDEO INAUDIO INCb/Pb
L/MONO R YCr/Pr
AC IN
COMPONENT IN
AUDIO IN 
2. Installation and Connections
You can connect a video cable to the Y connector of the COMPONENT connectors to display a VCR source. To do
so, from the menu, select [Setup] → [Options] → [Signal Select] → [Component] → [Video].
NOTE: Refer to your DVD players owners manual for more information about your DVD players video output requirements.
Connecting Your DVD Player with Component Output
DVD player Audio Equipment
Audio cable (not supplied)
Component video RCA
3
cable (not supplied) 
						

							18
AUDIO INLRAUDIO OUTLRVIDEO OUTS-VIDEO VIDEO
PC CARDCOMPONENT INUSB LANAUDIO INCOMPUTER 3 IN
COMPUTER 1 IN COMPUTER 2 IN
PC CONTROLMONITOR OUT
AUDIO OUT S-VIDEO IN VIDEO INAUDIO INCb/Pb
L/MONO R YCr/Pr
AC IN
S-VIDEO IN
VIDEO IN
AUDIO IN
2. Installation and Connections
Connecting Your VCR or Laser Disc Player
S-Video cable (not supplied)
Video cable (not supplied)
VCR/ Laser disc player
Audio equipment
Audio cable (not supplied)
NOTE: Refer to your VCR or laser disc player owners manual for more information about your equipments video output require-
ments.
NOTE: An image may not be displayed correctly when a Video or S-Video source is played back in fast-forward or fast-rewind via a
scan converter. 
						

							19
PC CARDCOMPONENT INUSB LANAUDIO INCOMPUTER 3 IN
COMPUTER 1 IN COMPUTER 2 INPC CONTROLMONITOR OUT
AUDIO OUT S-VIDEO IN VIDEO INAUDIO INCb/Pb
L/MONO R YCr/Pr
AC IN
LAN
Connecting to a Network
The LT380/LT280 comes standard with a LAN port (RJ-45) which provides a LAN connection using a LAN cable.
Placing the optional wireless LAN card (NWL-100*) in the PC card slot of the projector also provides a wireless LAN
connection. To use a LAN connection, you are required to assign an IP address to the projector. For setting the LAN
mode, see page 86 (From the menu, select [Setup] → [Installation] → [LAN Mode])
With the LAN connection, two features are available: Projector control and Picture transmission.
Projector control feature
With the wired or wireless LAN connection, you can control (power on/off, input select, etc.) and receive information
from the projector over the network using a computer. The following two methods are available:
*Using the HTTP Server feature on the projector. (→ page 48)
*Using PC Control Utility 3.0 from the supplied User Supportware 3 CD-ROM.
Picture transmission feature
With the wired or wireless LAN connection, you can send images and slides from a personal computer to the projector
which then can be projected on the screen. The following two methods are available:
*Using Image Express Utility 2.0 from the supplied User Supportware 3 CD-ROM.
*Using Ulead Photo Explore 8.0 from the supplied User Supportware 3 CD-ROM.
With the USB mouse connected to the projector, you can also operate the desktop screen on your Windows PC
connected to the LAN or the wireless LAN.
* Using Desktop Control Utility 1.0 from the supplied User Supportware 3 CD-ROM.
NOTE: Use a wireless LAN card conforming to the Wi-Fi standard for your personal computer.
TIP: Five Windows software programs (Image Express Utility 2.0, Desktop Control Utility 1.0, Ulead Photo Explorer 8.0, Viewer PPT
Converter and PC Control Utility 3.0) and a Macintosh software program (Image Express Utility 2 for Mac OS X) are contained on the
supplied Projector User Supportware 3 CD-ROM. For their functions and operations, see the users guides (PDF) contained on the
same CD-ROM.
Example of LAN connection
(A) Example of wired LAN connection
Server
Hub
LAN cable (not supplied)
2. Installation and Connections 
						

							20
(B) Example of wireless LAN connection
(Network Type → Mode: Infrastructure)
2. Installation and Connections
Access
Point
Wired LAN
To make connection with a wired LAN via an access point, you need to select the Infrastructure mode.
From the menu, select [Setup] → [Installation] → [LAN Mode] → [PC Card] → [Advanced] → [Network Type] →
[Mode] → [Infrastructure].
(C) Example of wireless LAN connection (Network Type → Mode: 802.11 Ad Hoc)
To enable direct communication (i.e., peer-to-peer) between personal computers and projectors, you need to
select the 802.11 Ad Hoc mode.
From the menu, select [Setup] → [Installation] → [LAN Mode] → [PC Card] → [Advanced] → [Network Type] →
[Mode] → [802.11 Ad Hoc].
The 802.11 Ad Hoc mode complies with IEEE802.11 standard.
When in Ad Hoc mode, only 802.11b is available for communication method.
Data transmission speed in Ad Hoc mode is limited up to 11Mbps.
Wireless LAN card
(Optional)PC with wireless
LAN card insertedPC with built-in wireless
LAN function
Wireless LAN card
(Optional)
PC with wireless
LAN card insertedPC with built-in wireless
LAN function