NEC LT260 Installation Manual

LT260/260K 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: 1 chip DLP
Native Resolution: 1024 x 768 (XGA)
Brightness: LT260:
LT260K: 2400 ANSI

Lens Specifications

Throw Ratio: 2.0 - 2.4:1(approx.)
Offset Angle: 12.3
Screen Sizes: 30"-500"
Notes
For screen sizes not indicated on the projection charts, use the formulas below.
If a value in a chart does not match the results of the formulas, use the values in the chart.
The ceiling must be strong enough to support the projector and the installation must be in accordance with any local
building codes.
All formulas are based on a 4:3 aspect ratio and screen.
4:3 sources can be displayed on a 16:9 screen without vertical "squeezing", see "Aspect Ratio" in the user manual.
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)
Projection Formulas:
B = 0.5265H – 0.013
C (wide) = 2.0062H – 1.764
C (tele) = 2.4281H – 1.260
D = 0.1515H - 0.013
-1
α (wide) = tan
(B/C(wide))
-1
α (tele) = tan
(B/C(tele))
www.necvisualsystems.com
TM projector
2100 ANSI
° °
-14.9 (approx.)
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
α = Throw Angle
Screen Formulas (4:3):
H = Screen Diagonal x 4/5
V = Screen Diagonal x 3/5
Screen Diagonal = H x 5/4
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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 bottom for desktop application)
NEC Solutions (America), Inc.
Visual Systems
LT260/260K Page 1 of 7
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