NEC LT154 Installation Data

LT154/155/156 Installation Data
Desktop and Ceiling Mount
Contents
Product Description, Lens Specs, Notes and Formulas
Projection Distances and Screen Sizes
Ceiling Mount Installation
Desktop Setup
Cabinet Dimensions
Top, Front and Left Side
Bottom, Back and Right Side
Ceiling Mount Dimensions
Top, Front and Left Side
Bottom, Back and Right Side
PC Control Codes

Product Description

Type: LT154: 3 panel, 0.9" p-Si non-MLA LCD projector
LT155: 3 panel, 0.9" p-Si w/MLA LCD projector
LT156: 3 panel, 0.9" p-Si w/MLA LCD projector, w/DVI Input
Brightness: LT154: 900 ANSI Lumens
LT155/156: 1200 ANSI Lumens

Lens Specifications

Throw Ratio: 1.9-2.0:1(Wide) / 2.2-2.3:1(Tele)
Offset Angle: 9.0° (Wide) / 7.5° (Tele)
Screen Sizes: 25" - 300" Diagonal
Notes
For Screen Sizes of 25 to 300 inches not indicated on the projection tables, use the formulas below.
If the figures on the tables do not match the results of formulas, use the figures in the table.
The ceiling must be strong enough to support the LCD projector and the installation must be in accordance with any local
building codes.
All calculations are based on 4:3 aspect ratio.
Distances are in inches, for millimeters multiply by 25.4.
Distances may vary 5%.
Formulas
Units: Inches (for millimeters multiply final number by 25.4)
D = Screen Diagonal (4:3)
H = D x 0.8
V = D x 0.6
M 1.38889H
B = 0.2165M
C (Wide) = 1.4483M - 2.165
C (Tele) = C (Wide) x 1.15
D = 0.0535M
-1
(wide) = tan (B/C(wide))
-1
(tele) = tan (B/C(tele))
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Focal Length:
F/#:
Focus Adjustment:
H = Screen Width (4:3)
V = Screen Height (4:3)
M = Projection magnification
B = Vertical distance between lens center and screen center
C = Throw distance
D = Vertical distance between lens center and top of screen (bottom of screen
= Throw angle
Native Resolution: 1024 x 768
Dimensions: 8.2"(W) x 11.1"(D) x 2.8"(H)
Weight: 4.9 lbs
36.5 - 42mm
2.0 - 2.3
Manual Focus / Manual Zoom
for desktop application)
Visual Systems
Rev. 1.8
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