NEC LT220 Installation Manual

LT220 Installation Guide
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 Right Side
Bottom, Back and Left Side
Ceiling Mount Dimensions
Control Codes
Product Description
Type: Single chip DMD
Native Resolution: 800 x 600 (SVGA)
Brightness: 2000 ANSI Lumens
Lens Specifications
Throw Ratio: 2.0 - 2.5:1(approx.)
°
Offset Angle: 12.3 -14.8
Screen Sizes: 30"-500"
Notes
For screen sizes 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 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)
Definitions:
H = Horizontal Screen Width (4:3)
V = Vertical Screen Height (4:3)
B = Vertical distance between lens center and screen center
C = Throw distance
D = Vertical distance between lens center and screen top (screen bottom for desktop application)
α = Throw Angle
Projection Formulas:
B = 0.5421H - 0.011
C (wide) = 2.0656H - 1.586
C (tele) = 2.5001H - 1.016
D = 0.1671H - 0.011
-1
α (wide) = tan
(B/C(wide))
-1
α (tele) = tan
(B/C(tele))
www.necvisualsystems.com
TM
projector
°
(approx.)
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Dimensions: 10.24"(W) x 4.74"(H) x 11.81"(D)
Weight: 6.5 lbs
Focal Length: 28.4mm - 34.0mm
F/#: 2.2 - 2.5
Manual Focus/Manual Zoom
Screen Formulas (4:3):
H = Screen Diagonal x 4/5
V = Screen Diagonal x 3/5
Screen Diagonal = H x 5/4
NEC Solutions (America), Inc.
Visual Systems
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