NEC Projector LT35 LT30 LT25 User Manual

							3
About this users manual
The fastest way to get started is to take your time and do everything right the first time. Take a few minutes now to
review the users manual. This may save you time later on. At the beginning of each section of the manual youll find an
overview. If the section doesnt apply, you can skip it.
1. Introduction 
						

							4
1. Introduction
 Part Names of the Projector
LAMP
STATUS
POWERSOURCE
AUTO ADJ.
FOCUS ON/STAND BY
S
E
L
E
C
T
COMPUTER IN
AUDIO IN
S-VIDEO IN
VIDEO IN
LAMP
STATUS
POWER
S
O
U
R
C
EA
U
T
O
 A
D
J
.
F
O
C
U
S
O
N
/S
T
A
N
D
 B
YSELECT
PC CONTROL
Zoom Lever
(→ page 22)Controls
(→ page 6)
Lens
Lens Cap
Built-in Security Slot (  )*
Adjustable Tilt Foot Button
(→ page 21)
Adjustable Tilt  Foot
(
→ page 21)
Remote sensor
(→ page 8)
Ventilation (inlet)
Front/Top
AC Input
Connect the supplied power cables three-pin plug here, and
plug the other end into an active wall outlet. (
→ page 16) Terminal Panel
(
→ page 6)Monaural Speaker  (1W)
Rear
*This security slot supports the MicroSaver ® Security System. MicroSaver ® is a registered trademark of
Kensington Microware Inc. The logo is trademarked and owned by Kensington Microware Inc.
Ventilation (outlet)
Heated air is exhausted from here. Focus sensor
(→ page 22, 46) 
						

							5
1. Introduction
Bottom
Lamp Cover
(→ page 47)
Rear foot
(
→ page 21)
Rear foot
(→ page 21) 
						

							6
1. Introduction
Top Features
LAMP
STATUS
POWER
SOURCE AUTO ADJ. FOCUS
ON/STAND BY
SELECT
10
2 41
589
367
11
1. POWER Button (ON / STAND BY) () (→ page 17,
27)
2. POWER Indicator (→ page 16, 17, 27, 50)
3. STATUS Indicator (→ page 50)
4. LAMP Indicator (→ page 47, 50)
5. SOURCE Button (→ page 19)
6. AUTO ADJ. Button (→ page 26)7. FOCUS Button (→ page 24)
8. MENU Button
9. SELECT 
/ Volume / Keystone 
 But-
tons
10. ENTER Button
11. EXIT Button
Terminal Panel Features
COMPUTER IN PC CONTROLAUDIO IN S-VIDEO IN VIDEO IN
13452
1.COMPUTER IN/ Component Input Connector  (Mini
D-Sub 15 Pin) (→ page 12, 13, 14)
2. VIDEO IN Connector (RCA) (→ page 15)
3. S-VIDEO IN Connector (Mini DIN 4 Pin)
(→ page 15)
4. AUDIO IN Mini Jack (Stereo Mini) (→ page 12, 14)5. PC CONTROL Port (Mini DIN 8 Pin) (→ page 58)
Use this port to connect a PC or control system. This
enables you to control the projector using serial com-
munication protocol. If you are writing your own pro-
gram, typical PC control codes are on page 58. 
						

							7
1. Introduction

 Part Names of the Remote Control
1. Infrared Transmitter (→ page 8)
2. POWER ON Button (→ page 17)
3. POWER OFF Button (→ page 27)
4. FOCUS (+) (–) Button (→ page 24)
5. PIC-MUTE Button (→ page 28)
6. PAGE (UP) / (DOWN) Button* (→ page 31)
7. MENU Button
8. SELECT Buttons
9. ENTER Button
10. EXIT Button
11. L-CLICK MOUSE Button* (→ page 31)
LAMP MODE
VOLUMES-VIDEOVIDEO L-CLICK
MOUSE
R-CLICK
AUTO ADJ. COMPUTER
ASPECT HELP
FREEZE PICTURE
ENTEREXIT MENUUP FOCUS PAGEOFF
POWERON
PIC-MUTE
DOWN
1
3
4
76
9
2
8
10
5
11
13
14
12
21
22
20
17
16 15
19
18
12. R-CLICK MOUSE Button* (→ page 31)
13. VIDEO Button (→ page 19)
14. S-VIDEO Button (→ page 19)
15. COMPUTER Button (→ page 19)
16. LAMP MODE Button (→ page 28)
17. AUTO ADJ. Button (→ page 26)
18. VOLUME (+) (–) Button (→ page 26)
19. ASPECT Button (→ page 38)
20. PICTURE Button (→ page 37, 38)
21. HELP Button (→ page 44)
22. FREEZE Button (→ page 28)
* Available only when the optional remote mouse receiver is connected with your computer. 
						

							8
1. Introduction
30˚
30˚
Remote Control Precautions
•Handle the remote control carefully.
•If the remote control gets wet, wipe it dry immediately.
•Avoid excessive heat and humidity.
•Do not heat, take apart, or throw batteries into fire.
•If you will not be using the remote control for a long time, remove the batteries.
•Ensure that you have the batteries polarity (+/–) aligned correctly.
•Do not use new and old batteries together, or use different types of batteries together.
•Dispose of used batteries according to your local regulations.
Operating Range for Wireless Remote Control Battery Installation
1Press firmly and slide the
battery cover off.2Install new batteries (AAA). En-
sure that you have the batteries
polarity (+/–) aligned correctly.3Slip the cover back over the bat-
teries until it snaps into place. Do
not mix different types of batter-
ies or new and old batteries.
Remote sensor on projector cabinet Remote control7m/22 feet
•The infrared signal operates by line-of-sight up to a distance of about 22 feet/7 m and within a 60-degree angle of
the remote sensor on the projector cabinet.
•The projector will not respond if there are objects between the remote control and the sensor, or if strong light falls
on the sensor. Weak batteries will also prevent the remote control from properly operating the projector. 
						

							9
This section describes how to set up your projector and how to connect 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 (0.76 m) measured diagonally when the projector is roughly 47 inches (1.2 m) from the wall or
screen. The largest the image can be is 300 (7.6 m) when the projector is about 480 inches (12.2 m) from the wall or
screen. Use the chart below as a rough guide.Your projector is simple to set up and use.
But before you get started, you must first:

Set up a screen and the projector.
Connect your computer or video equip-
ment to the projector. See pages 12 to
15.
Connect the supplied power cable. See
page 16.
NOTE: Ensure that the power cable and any other
cables are disconnected before moving the pro-
jector. When moving the projector or when it is
not in use, cover the lens with the lens cap.
To the wall outlet.
Distance (Unit: m/inch)
Lens center
Screen Size (diagonal: inch)
Screen Size (Unit: cm/inch)609.6(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
8012.2/480.3
9.8/385.88.1/318.97.3/287.46.1/240.24.9/192.94.0/157.53.2/126.02.4/94.51.6/63.01.2/47.2
NOTE:
•The distances are indicated by intermediate values between tele and wide. Use as a rule of thumb.
•The Zoom lever adjusts the image size up to +/-10%
•For more details on throw distance, see next page.
•Changing the image size starts the Auto Focus to adjust the focus; changing the throw angle starts the Auto Keystone to correct
the vertical keystone distortion. 
						

							10
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
α = Throw angle
NOTE: Distances may vary +/-5%.
α
Wide – Tele
degree
12.1 - 10.0
11.9 - 9.9
11.8 - 9.9
11.8 - 9.9
11.7 - 9.8
11.8 - 9.8
11.7 - 9.8
11.7 - 9.8
11.7 - 9.8
11.7 - 9.8
11.7 - 9.8
11.7 - 9.8
11.6 - 9.7
11.6 - 9.7
11.6 - 9.7
11.6 - 9.7
11.6 - 9.7
11.6 - 9.7 inch
18
24
36
40
43
48
50
54
60
72
90
108
120
132
144
156
168
180 Screen Size B C
Wide – TeleDiagonal Width Heightinch
42 – 51
57 – 69
86 – 104
96 – 116
104 – 125
115 – 139
121 – 146
130 – 156
145 – 174
174 – 209
218 – 261
262 – 314
291 – 349
320 – 384
350 – 419
379 – 454
408 – 489
438 – 524 inch
9
12
18
20
22
24
25
27
30
36
45
54
60
66
72
78
84
90 inch
30
40
60
67
72
80
84
90
100
120
150
180
200
220
240
260
280
300inch
24
32
48
54
58
64
67
72
80
96
120
144
160
176
192
208
224
240α
Wide – Teledegree
12.1 - 10.0
11.9 - 9.9
11.8 - 9.9
11.8 - 9.9
11.7 - 9.8
11.8 - 9.8
11.7 - 9.8
11.7 - 9.8
11.7 - 9.8
11.7 - 9.8
11.7 - 9.8
11.7 - 9.8
11.6 - 9.7
11.6 - 9.7
11.6 - 9.7
11.6 - 9.7
11.6 - 9.7
11.6 - 9.7 mm
457
610
914
1021
1097
1219
1280
1372
1524
1829
2286
2743
3048
3353
3658
3962
4267
4572 Screen Size B C
Wide – TeleDiagonal Width Heightmm
1070 - 1290
1450 - 1740
2190 - 2630
2450 - 2940
2640 - 3170
2930 - 3520
3080 - 3700
3310 - 3970
3680 - 4410
4420 - 5300
5540 - 6640
6650 - 7980
7400 - 8870
8140 - 9760
8890 - 10650
9630 - 11540
10370 - 12430
11120 - 13320 mm
229
305
457
511
549
610
640
686
762
914
1143
1372
1524
1676
1829
1981
2134
2286 mm
762
1016
1524
1702
1829
2032
2134
2286
2540
3048
3810
4572
5080
5588
6096
6604
7112
7620mm
610
813
1219
1361
1463
1626
1707
1829
2032
2438
3048
3658
4064
4470
4877
5283
5690
6096
C
αB
Screen center
Lens center
Screen bottom 2.4/60 mm
Projector bottom 
						

							11
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
selected automatically at 95°F to 104°F/35°C to 40°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 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 41) 
						

							12
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.
PC CONTROL AUDIO IN S-VIDEO IN VIDEO INCOMPUTER IN
PHONE
COMPUTER IN
AUDIO IN 
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)
NOTE: The L-shaped plug of an audio
cable does not fit into the AUDIO IN jack.
IBM VGA or Compatibles (Notebook
type) or Macintosh (Notebook type)
NOTE: The projector 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 projector cabinet.
NOTE: For older Macintosh, use a commercially avail-
able pin adapter (not supplied) to connect to your
Macs video port.