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

Screen Width

Screen Diagonal

Screen center

Screen Height

(B)

Screen Bottom

(D)

Lens Center

Throw Angle (￿)

Throw Distance (C)

B = Vertical distance between lens center and screen center

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%.

 

Screen Size

 

B

 

C

 

D

 

α

 

Diagonal

Width

Height

 

Wide – Tele

 

Wide – Tele

inch

inch

inch

inch

 

inch

inch

degree

25

20.0

15.0

6.0

28.0

-

34.0

-2.0

12.1

-

9.9

30

24.0

18.0

7.0

34.0

-

41.0

-2.0

12.0

-

9.9

40

32.0

24.0

10.0

46.0

-

56.0

-2.0

11.8

-

9.7

60

48.0

36.0

14.0

70.0

-

85.0

-4.0

11.7

-

9.6

67

54.0

40.0

16.0

78.0

-

95.0

-4.0

11.6

-

9.6

72

58.0

43.0

17.0

84.0

-

102.0

-4.0

11.6

-

9.6

80

64.0

48.0

19.0

94.0

-

114.0

-5.0

11.6

-

9.6

84

67.0

50.0

20.0

98.0

-

120.0

-5.0

11.6

-

9.6

90

72.0

54.0

22.0

106.0

-

128.0

-5.0

11.6

-

9.6

100

80.0

60.0

24.0

118.0

-

143.0

-6.0

11.5

-

9.6

120

96.0

72.0

29.0

141.0

-

172.0

-7.0

11.5

-

9.5

150

120.0

90.0

36.0

177.0

-

215.0

-9.0

11.5

-

9.5

180

144.0

108.0

43.0

213.0

-

258.0

-11.0

11.5

-

9.5

200

160.0

120.0

48.0

237.0

-

287.0

-12.0

11.4

-

9.5

220

176.0

132.0

53.0

261.0

-

316.0

-13.0

11.4

-

9.5

240

192.0

144.0

58.0

285.0

-

345.0

-14.0

11.4

-

9.5

260

208.0

156.0

62.0

309.0

-

374.0

-16.0

11.4

-

9.5

280

224.0

168.0

67.0

333.0

-

403.0

-17.0

11.4

-

9.5

300

240.0

180.0

72.0

356.0

-

431.0

-18.0

11.4

-

9.5

 

Screen Size

 

B

 

C

 

D

 

α

 

Diagonal

Width

Height

 

Wide – Tele

 

Wide – Tele

mm

mm

mm

mm

mm

 

 

mm

degree

635

508

381

152

710

-

870

-38

12.1

-

9.9

762

610

457

183

860

-

1050

-46

12.0

-

9.9

1016

813

610

244

1170

-

1420

-61

11.8

-

9.7

1524

1219

914

366

1770

-

2160

-91

11.7

-

9.6

1702

1361

1021

408

1990

-

2410

-102

11.6

-

9.6

1829

1463

1097

439

2140

-

2600

-110

11.6

-

9.6

2032

1626

1219

488

2380

-

2890

-122

11.6

-

9.6

2134

1707

1280

512

2500

-

3040

-128

11.6

-

9.6

2286

1829

1372

549

2680

-

3260

-137

11.6

-

9.6

2540

2032

1524

610

2990

-

3620

-152

11.5

-

9.6

3048

2438

1829

732

3590

-

4360

-183

11.5

-

9.5

3810

3048

2286

914

4500

-

5460

-229

11.5

-

9.5

4572

3658

2743

1097

5410

-

6560

-274

11.5

-

9.5

5080

4064

3048

1219

6020

-

7290

-305

11.4

-

9.5

5588

4470

3353

1341

6630

-

8030

-335

11.4

-

9.5

6096

4877

3658

1463

7230

-

8760

-366

11.4

-

9.5

6604

5283

3962

1585

7840

-

9490

-396

11.4

-

9.5

7112

5690

4267

1707

8450

- 10230

-427

11.4

-

9.5

7620

6096

4572

1829

9050

- 10960

-457

11.4

-

9.5

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 32°F (0°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 of the projector.

Reflecting the Image

Using a mirror to reflect your projector's image enables you to enjoy a much larger image. Contact your NEC dealer if you need a mirror. If you're using a mirror 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 86.

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Image 22
NEC VT770 manual Installation and Connections Throw Distance and Screen Size, Distance Chart, Reflecting the Image

VT770 specifications

The NEC VT770 is a versatile and powerful projector designed for various applications, primarily in educational and corporate environments. It stands out for its remarkable image quality, ease of use, and innovative features that cater to both presenters and audiences.

One of the key features of the VT770 is its native XGA resolution (1024 x 768 pixels), which ensures clear and detailed images. It utilizes a 3LCD technology, which contributes to bright, vibrant colors and high light output. With a brightness rating of 2800 ANSI lumens, it performs exceptionally well in diverse lighting conditions, making it suitable for medium to large-sized rooms without compromising image quality.

The VT770 offers a contrast ratio of up to 600:1, which enhances the distinction between the brightest whites and the deepest blacks. This feature is particularly beneficial for presentations that involve detailed graphs or images, as it allows for precise visual communication. The projector’s lamp life extends to approximately 6000 hours in eco mode, thus reducing operational costs and the frequency of replacements.

Connectivity is another area where the VT770 excels. It comes equipped with multiple input options, including VGA, composite video, S-video, and HDMI. This flexibility allows users to connect various devices such as laptops, DVD players, and video game consoles seamlessly. Additionally, the projector supports optional wireless connectivity, enabling presentations without the hassle of cables.

User-friendly features are integrated into the VT770, including an intuitive control panel and remote control, allowing easy adjustments and navigation through settings. The projector also incorporates keystone correction, which aids in aligning the image and ensuring a squared display despite the projection angles.

Another distinguishing characteristic of the VT770 is its lightweight and portable design, making it an excellent choice for professionals on the go. It can be easily transported between locations, enabling spontaneous presentations without the need for extensive setup time.

In conclusion, the NEC VT770 is a feature-packed projector that combines high-quality imaging with flexible connectivity and user-friendly operation. Its suitability for educational and business presentations makes it an invaluable tool for professionals seeking reliable performance and portability.