NEC Lt245 Portable Projector Users Manual

							14
This section describes how to set up your projector and how to connect PCs, video and audio sources.
2. Installation and Connections

 Setting Up the Screen and the Projector
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 30 inches (0.8 m) measured diagonally when the projector is roughly 51.2 inches (1.3 m) from the wall
or screen. The largest the image can be is 500 inches (12.7 m) when the projector is about 970 inches (24.6 m) from
the wall or screen. Use the drawing below as a guide.Your projector is simple to set up and use.
But before you get started, you must first:
zSet up a screen and the projector.
xConnect your computer or video equip-
ment to the projector. See pages 17 -
25.
cConnect the supplied power cable. See
page 26.
NOTE: Ensure that the power cable and any
other cables are disconnected before moving
the projector. When moving the projector or
when it is not in use, cover the lens with the
lens cap.To the wall outlet.
32
1
Distance
Screen size (Unit: cm/inch)
Screen size
Lens center609.6 (W) 
 457.2 (H) / 240 (W) 
 180 (H)
487.7 (W) 
 365.8 (H) / 192 (W) 
 144 (H)
406.4 (W) 
 304.8 (H) / 160 (W) 
 120 (H)
365.8 (W) 
 274.3 (H) / 144 (W) 
 108 (H)
304.8 (W) 
 228.6 (H) / 120 (W) 
 90 (H)
243.8 (W) 
 182.9 (H) / 96 (W) 
 72 (H)
203.2 (W) 
 152.4 (H) / 80 (W) 
 60 (H)
162.6 (W) 
 121.9 (H) / 64 (W) 
 48 (H)
121.9 (W) 
 91.4 (H) / 48 (W) 
 36 (H)
81.3 (W) 
 61.0 (H) / 32 (W) 
 24 (H)
61.0 (W) 
 45.7 (H) / 24 (W) 
 18 (H)300
240
200
180
150
120
100
60
40
30
80
1.3/50.8
(1.0/39.5)
1.7/68.5
(1.4/53.3)
2.6/103.8
(2.1/80.9)
3.5/139.2 (2.8/108.6)4.4/174.5 (3.5/136.2)
5.3/209.9 (4.2/163.8)
6.7/262.9 (5.2/205.2)
8.0/315.9 (6.3/246.7)
8.9/351.3 (7.0/274.3)
10.7/422.0 (8.4/329.5)
13.4/528.0 (10.5/412.4)
NOTE:
•Values in parentheses for LT245.
•The screen sizes above are intermediate values between tele (minimum display area) and wide (maximum display area). Image
size can be adjusted with the zoom adjustment up to a maximum of 10%.
•To avoid premature lamp failure, do not tilt the front of the projector up or down by more than 7° from level.
Unit: m/inch 
						

							15
2. Installation and Connections
Throw Distance and Screen Size
The following shows the proper relative positions of the pro-
jector and screen. Refer to the table to determine the posi-
tion of installation.
Distance Chart
B  = Vertical distance between lens center and screen cen-
ter
C = Throw distance
D = Vertical distance between lens center and bottom of
screen (top of screen for ceiling application)
α = Throw angle
NOTE: Distances may vary +/-5%.
α
Wide – Tele
degree
15.4 – 12.7
15.3 – 12.6
15.1 – 12.5
15.0 – 12.4
15.0 – 12.4
15.0 – 12.4
15.0 – 12.4
15.0 – 12.4
14.9 – 12.4
14.9 – 12.3
14.9 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3 inch
18
24
36
40
43
48
50
54
60
72
90
108
120
126
144
157
162
180
210
240
270
300 Screen Size B C
Wide – TeleDDiagonal Width Heightinch
45.6 – 56.0
61.5 – 75.4
93.5 – 114.1
104.7 – 127.7
112.7 – 137.4
125.5 – 152.9
131.9 – 160.6
141.5 – 172.2
157.4 – 191.6
189.4 – 230.3
237.3 – 288.4
285.3 – 346.6
317.2 – 385.3
333.2 – 404.7
381.2 – 462.8
414.7 – 503.4
429.1 – 520.9
477.0 – 579.0
557.0 – 675.8
636.9 – 772.7
716.8 – 869.5
796.7 – 966.4inch
3.6
4.8
7.2
8.0
8.6
9.6
10.1
10.8
12.0
14.4
18.0
21.6
24.0
25.2
28.8
31.4
32.5
36.1
42.1
48.1
54.1
60.1 inch
12.6
16.8
25.2
28.1
30.2
33.6
35.3
37.8
42.0
50.4
63.0
75.6
84.0
88.2
100.8
109.7
113.5
126.1
147.1
168.1
189.1
210.1 inch
30
40
60
67
72
80
84
90
100
120
150
180
200
210
240
261
270
300
350
400
450
500inch
24
32
48
54
58
64
67
72
80
96
120
144
160
168
192
209
216
240
280
320
360
400
LT265
Lens Center
Throw Angle (
)
Throw Distance (C) Screen center Screen Diagonal Screen Width
Screen Height
Screen Bottom
(B)
(D)
α
Wide – Tele
degree
15.4 – 12.7
15.3 – 12.6
15.1 – 12.5
15.0 – 12.4
15.0 – 12.4
15.0 – 12.4
15.0 – 12.4
15.0 – 12.4
14.9 – 12.4
14.9 – 12.3
14.9 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3
14.8 – 12.3 mm
457
610
914
1021
1097
1219
1280
1372
1524
1829
2286
2743
3048
3200
3658
3978
4115
4572
5334
6096
6858
7620 Screen Size B C
Wide – TeleDDiagonal Width Heightmm
1,157 – 1,423
1,563 – 1,915
2,375 – 2,899
2,659 – 3,243
2,862 – 3,489
3,187 – 3,883
3,349 – 4,080
3,593 – 4,375
3,999 – 4,867
4,811 – 5,851
6,028 – 7,327
7,246 – 8,802
8,058 – 9,786
8,464 – 10,278
9,682 – 11,754
10,534 – 12,787
10,899 – 13,230
12,117 – 14,706
14,147 – 17,166
16,176 – 19,626
18,206 – 22,086
20,235 – 24,545mm
91
122
183
204
219
244
256
274
305
366
458
549
610
641
733
797
824
916
1069
1222
1375
1527 mm
320
427
640
714
768
853
896
960
1067
1280
1601
1921
2134
2241
2562
2786
2882
3202
3736
4270
4804
5337 mm
762
1016
1524
1702
1829
2032
2134
2286
2540
3048
3810
4572
5080
5334
6096
6629
6858
7620
8890
10160
11430
12700mm
610
813
1219
1361
1463
1626
1707
1829
2032
2438
3048
3658
4064
4267
4877
5304
5486
6096
7112
8128
9144
10160 inch
30
40
60
67
72
80
84
90
100
120
150
180
200
210
240
261
270
300
350
400
450
500
α
Wide – Tele
degree
19.4 – 16.2
19.1 – 16.0
18.9 – 15.9
18.9 – 15.8
18.8 – 15.8
18.8 – 15.8
18.8 – 15.8
18.8 – 15.8
18.7 – 15.7
18.7 – 15.7
18.7 – 15.7
18.6 – 15.7
18.6 – 15.7
18.6 – 15.7
18.6 – 15.6
18.6 – 15.6
18.6 – 15.6
18.6 – 15.6
18.6 – 15.6
18.6 – 15.6
18.5 – 15.6
18.5 – 15.6 inch
18
24
36
40
43
48
50
54
60
72
90
108
120
126
144
157
162
180
210
240
270
300 Screen Size B C
Wide – TeleDDiagonal Width Heightinch
35.7 – 43.3
48.2 – 58.4
73.3 – 88.5
82.1 – 99.1
88.4 – 106.6
98.5 – 118.7
103.5 – 124.7
111.0 – 133.7
123.6 – 148.8
148.7 – 178.9
186.3 – 224.1
224.0 – 269.3
249.1 – 299.5
261.7 – 314.5
299.3 – 359.7
325.7 – 391.4
337.0 – 405.0
374.6 – 450.2
437.4 – 525.5
500.2 – 600.8
563.0 – 676.2
625.7 – 751.5inch
3.5
4.7
7.1
8.0
8.6
9.5
10.0
10.7
11.9
14.3
17.9
21.5
23.9
25.1
28.7
31.2
32.3
35.9
41.9
47.9
53.9
59.9 inch
12.5
16.7
25.1
28.1
30.2
33.5
35.2
37.7
41.9
50.3
62.9
75.5
83.9
88.1
100.7
109.5
113.3
125.9
146.9
167.9
188.9
209.9 inch
30
40
60
67
72
80
84
90
100
120
150
180
200
210
240
261
270
300
350
400
450
500inch
24
32
48
54
58
64
67
72
80
96
120
144
160
168
192
209
216
240
280
320
360
400
LT245
α
Wide – Tele
degree
19.4 – 16.2
19.1 – 16.0
18.9 – 15.9
18.9 – 15.8
18.8 – 15.8
18.8 – 15.8
18.8 – 15.8
18.8 – 15.8
18.7 – 15.7
18.7 – 15.7
18.7 – 15.7
18.6 – 15.7
18.6 – 15.7
18.6 – 15.7
18.6 – 15.6
18.6 – 15.6
18.6 – 15.6
18.6 – 15.6
18.6 – 15.6
18.6 – 15.6
18.5 – 15.6
18.5 – 15.6 mm
457
610
914
1021
1097
1219
1280
1372
1524
1829
2286
2743
3048
3200
3658
3978
4115
4572
5334
6096
6858
7620 Screen Size B C
Wide – TeleDDiagonal Width Heightmm
906 – 1,100
1,225 – 1,483
1,863 – 2,248
2,086 – 2,516
2,246 – 2,707
2,501 – 3,014
2,628 – 3,167
2,820 – 3,396
3,139 – 3,779
3,776 – 4,545
4,733 – 5,693
5,689 – 6,841
6,327 – 7,607
6,646 – 7,989
7,603 – 9,137
8,272 – 9,941
8,559 – 10,286
9,516 – 11,434
11,110 – 13,348
12,705 – 15,261
14,299 – 17,175
15,893 – 19,089mm
90
120
181
203
218
242
254
273
303
364
455
547
608
638
729
793
821
912
1064
1216
1369
1521 mm
319
425
639
713
766
852
894
958
1065
1278
1598
1918
2132
2238
2558
2782
2878
3198
3731
4264
4798
5331 mm
762
1016
1524
1702
1829
2032
2134
2286
2540
3048
3810
4572
5080
5334
6096
6629
6858
7620
8890
10160
11430
12700mm
610
813
1219
1361
1463
1626
1707
1829
2032
2438
3048
3658
4064
4267
4877
5304
5486
6096
7112
8128
9144
10160 inch
30
40
60
67
72
80
84
90
100
120
150
180
200
210
240
261
270
300
350
400
450
500 
						

							16
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 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.
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 system. If youre using a mir-
ror system and your image is inverted, use the MENU
and SELECT buttons on your projector cabinet or your
remote control to correct the orientation. See page 98. 
						

							17
PC CARD
R  AUDIO IN  L
AC INVIDEO INAUDIO OUT
S-VIDEO INPC CONTROLCOMPUTER 1 IN  COMPUTER 2 IN MONITOR OUT AUDIO INUSB LAN
PHONE
COMPUTER 1 IN
COMPUTER 2 INAUDIO IN
PHONE
2. Installation and Connections
 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.
Connecting Your PC or Macintosh Computer
RGB/VGA 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 supplied one.
Audio cable (not supplied)
IBM PC or Compatibles (Desktop type)
or Macintosh (Desktop type)
NOTE: For older Macintosh, use
a commercially available pin
adapter (not supplied) to
connect to your Macs video
port.
IBM VGA or Compatibles (Notebook
type) or Macintosh (Notebook type)
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 RGB/VGA signal cable to connect your PC or Macintosh to the projector.
3. Connect the supplied power cable. See page 26.
4. Turn on the projector and the computer.
5. 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.
NOTE: The COMPUTER 1 IN connector
supports Plug & Play (DDC2).
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. 
						

							18
NOTE: The LT265/LT245 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.
2. Installation and Connections
PC CARD
R  AUDIO IN  L
AC INVIDEO INAUDIO OUT
S-VIDEO INPC CONTROLCOMPUTER 1 IN  COMPUTER 2 IN MONITOR OUT AUDIO INUSB LAN
COMPUTER 1 IN
Before connections: An exclusive SCART adapter (ADP-SC1) and a commercially available SCART cable are re-
quired 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 1
IN connector of your projector and a SCART output (RGB) of your video equipment.
3. Connect the supplied power cable. See page 26.
4. Turn on the power to the projector and your video equipment.
5. Use the COMPUTER 1 button on the remote control to select the COMPUTER 1 IN connector.
6. Press the MENU button on the remote control to display the menu.
7. 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: 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 
						

							19
AUDIO
IN
PC CARD
R  AUDIO IN  L
AC INVIDEO INAUDIO OUT
S-VIDEO INPC CONTROLMONITOR OUTCOMPUTER 1 IN  COMPUTER 2 IN AUDIO INUSB LAN
MONITOR OUT
AUDIO 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.
To  do so:
1. Turn off the power to your projector, monitor and computer.
2. Use an RGB/VGA signal cable to connect your monitor to the MONITOR OUT (Mini D-Sub 15 pin) connector on
your projector.
3. Connect the supplied power cable. See page 26.
4. Turn on the projector, monitor and the computer.
NOTE:
•The MONITOR OUT connector outputs an RGB signal during Standby mode.
•When the projector is in the standby mode, the image may not be correctly displayed while the cooling fans are running
immediately after turning on or off the power.
•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.
RGB/VGA signal cable (supplied)
RGB/VGA signal cable (not supplied)
Audio cable (not supplied)
Audio cable (not supplied) 
						

							20
PC CARD
R  AUDIO IN  L
AC INVIDEO INAUDIO OUT
S-VIDEO INPC CONTROLCOMPUTER 1 IN  COMPUTER 2 IN MONITOR OUT AUDIO INUSB LAN
AUDIO INLR
AUDIO OUT
LR
Component
YCbCr
COMPUTER 1 IN
2. Installation and Connections
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 a 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 IN
connector on the projector.
For a DVD player without component video (Y,Cb,Cr) output, use an S-Video cable (not provided) to connect an S-
Video output of the DVD player to the Video Input of the projector.
3. Connect the supplied power cable. See page 26.
4. Turn on the projector and DVD player.
A component signal will be automatically displayed. If not, from the menu, select [Setup] → [Options] → [Signal
Select] → [Computer 1 (or 2)] → [Component].
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 playerAudio Equipment
Audio cable (not supplied)
Optional 15-pin - to - RCA (female)
3 cable
(ADP-CV1)
Component video RCA
3
cable (not supplied) 
						

							21
AUDIO INLRAUDIO OUTLRVIDEO OUTS-VIDEO VIDEO
PC CARD
AC INAUDIO OUTPC CONTROLR  AUDIO IN  L VIDEO INMONITOR OUTCOMPUTER 1 IN  COMPUTER 2 IN AUDIO INUSB LAN
S-VIDEO INS-VIDEO INVIDEO 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)
Use an RCA or S-Video cable (not provided) to connect the video and use RCA cables (not provided) to connect
the audio from 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 an RCA cable to the video output (or one end of an S-Video cable to the S-Video output
connector) on the back of your VCR or laser disc player, connect the other end to the appropriate video input on
your projector. Connect one end of a pair RCA cables (not supplied) to the audio output on the back of your VCR or
laser disc player, connect the other end to your audio equipment or to the appropriate audio input on the projector.
3. Connect the supplied power cable. See page 26.
4. 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.
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. 
						

							22
PC CARD
R  AUDIO IN  L
AC INVIDEO INAUDIO OUT
S-VIDEO INPC CONTROLMONITOR OUTCOMPUTER 1 IN  COMPUTER 2 IN AUDIO INUSB LAN
LAN
Connecting to a Network
The LT265/LT245 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 99 (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. See page 54.
*Using PC Control Utility 3.0 from the supplied User Supportware 2 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 2 CD-ROM.
*Using Ulead Photo Explore 8.0 from the supplied User Supportware 2 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 2 CD-ROM.
NOTE: For information about the five software utilities (Image Express Utility 2.0, Desktop Control Utility 1.0, Ulead Photo
Explorer 8.0, Viewer PPT Converter and PC Control Utility 3.0) contained  on the supplied Projector User Supportware 2.0 CD-
ROM, see the supplied “NEC Software Utility Installation Guide”. See also each online help of the software utilities for information
about their functions and operations.
Example of LAN connection
(A) Example of wired LAN connectionServer
Hub
LAN cable (not supplied)
2. Installation and Connections 
						

							23
(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] →
[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] →
[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.