Ceiling Installation

 

 

Formulas(mm)

 

 

H” = Horizontal Screen Width (inch)

F

 

A = C/cosα

 

 

B = 94 + 5.5 M

B

α

C (wide) = 36.8712 (diagonal screen size/ 0.92205) – 43.5689

C (tele) = C(wide) 1.2

 

 

 

F = 1.4516 M – 94

 

 

M = 1.25H” / 22.86

 

Formulas(inch)

 

 

H” = Horizontal Screen Width

A

A = C/cosα

 

B = (94+5.5 M) / 25.4

 

C (wide) = (36.8712

(diagonal screen size/0.92205) – 43.5689) / 25.4

C

C (tele) = C (wide)

1.2

F = 1.4516 M – 94/25.4

M = 1.25H / 0.9

A: Distance between the lens and the screen center

B: Vertical distance between the top of the supplied ceiling mount and the screen center

C: Horizontal throw distance between screen surface and the lens

F: Vertical distance between projector base and top of image

Zoom Lens (Wide)

α

 

 

degree

9.01

8.93

8.85

8.82

8.81

8.79

8.78

8.77

8.75

8.74

8.74

8.73

8.72

8.72

β

(=sinα

)

 

0.16

0.16

0.15

0.15

0.15

0.15

0.15

0.15

0.15

0.15

0.15

0.15

0.15

0.15

γ

(=cosα

)

 

0.99

0.99

0.99

0.99

0.99

0.99

0.99

0.99

0.99

0.99

0.99

0.99

0.99

0.99

Screen Size H-Width

inch

24

32

48

56

64

72

80

96

120

144

160

192

216

240

4:3 Diagonal

inch

30

40

60

70

80

90

100

120

150

180

200

240

270

300

A

 

 

mm

1171

1471

2242

2628

3013

3399

3785

4556

5713

6870

7641

9184

10341

11498

 

 

 

inch

46

58

88

103

119

134

149

179

225

270

301

362

407

453

C

 

 

mm

1156

1556

2356

2756

3155

3555

3955

4755

5955

7154

7954

9554

10753

11953

 

 

 

inch

46

61

93

108

124

140

156

187

234

282

313

376

423

471

B

 

 

mm

277

338

461

522

583

644

705

827

1011

1194

1316

1561

1744

1927

 

 

 

inch

11

13

18

21

23

25

28

33

40

47

52

61

69

76

F

 

 

mm

-46

-29

3

19

35

51

67

100

148

196

229

293

341

390

 

 

 

inch

-2

-1

0

1

1

2

3

4

6

8

9

12

13

15

Zoom Lens (Tele)

α

 

 

degree

6.28

7.1

7.0

7.0

7.0

7.0

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

β

(=sinα

)

 

0.11

0.12

0.12

0.12

0.12

0.12

0.12

0.12

0.12

0.12

0.12

0.12

0.12

0.12

γ

(=cosα

)

 

0.99

0.99

0.99

0.99

0.99

0.99

0.99

0.99

0.99

0.99

0.99

0.99

0.99

0.99

Screen Size H-Width

inch

20

32

48

56

64

72

80

96

120

144

160

192

216

240

4:3 Diagonal

inch

25

40

60

70

80

90

100

120

150

180

200

240

270

300

A

 

 

mm

1396

1902

2900

3399

3898

4397

4896

5893

7390

8887

9885

11881

13378

14875

 

 

 

inch

55

75

114

134

153

173

193

232

291

350

389

468

527

586

C

 

 

mm

1387

1867

2827

3307

3787

4266

4746

5706

7146

8585

9545

11464

12904

14344

 

 

 

inch

55

74

111

130

149

168

187

225

281

338

376

451

508

565

B

 

 

mm

247

338

461

522

583

644

705

827

1011

1194

1316

1561

1744

1927

 

 

 

inch

10

13

18

21

23

25

28

33

40

47

52

61

69

76

F

 

 

mm

-54

-29

3

19

35

51

67

100

148

196

229

293

341

390

 

 

 

inch

-2

-1

0

1

1

2

3

4

6

8

9

12

13

15

WARNING

Installing your projector on the ceiling must be done by a quali- fied technician. Contact your NEC dealer for more informa- tion.

* Do not attempt to install the projector yourself.

Only use your projector on a solid, level surface. If the projec- tor 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 pro- jector so heat can dissipate. Do not cover the vents on the side or the front of the projector.

If your projector is mounted on the ceiling and your image is upside down, use the “Menu” and “Select” buttons on your projector cabinet or ▲▼ button on your remote control to correct the orientation. (See page E-31.)

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 ▲▼ buttons on your remote control to correct the orientation. (See page E-31.)

E–16