NEC VT470 Installation Manual

VT470/570/575/670/676 Installation Guide
Ceiling Mounted and Desktop
Contents
Product Description, Lens Specs, Notes and Formulas
Diagrams and Distance Charts
Cabinet Dimensions
Ceiling Mount Dimensions
Input Panel and Control Codes

Product Description

Type: 3 panel LCD projector,
0.7" p-Si TFT (VT670 w/MLA)
Resolution: VT470:
VT570/575/670/676: 1024x768
Dimensions: 11.57"(W) x 4.43"(H) x 11.10"(D)
Weight: 6.4 lbs

Lens Specifications

Throw Ratio: 1.5 - 1.8:1(for 100" diagonal)
Offset Angle: 9.6°-11.5° (for 100" diagonal)
Screen Sizes: 21"-300" diagonal (4:3)
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.
Distances are in inches, for millimeters multiply by 25.4.
Distances may vary ±5%.
Formulas
The Projection Formulas use the image width for calculation. Image width is the same for all aspect ratios, only vertical image size
varies. For proper projector placement, determine the image width for a desired screen size. Use the Screen Formulas below to
calculate all screen dimensions. Plug in the image width for "W" in the Projection Formulas.
Refer to the diagrams and charts for popular screen sizes on page 2.
Definitions:
W = Image Width
H = Image Height (Size)
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)
α = Projection angle
Projection Formulas:
B = 0.2986W
C (wide) = 1.4813W – 1.425
C (tele) = 1.7913W – 1.406
D = 0.0764W
α (wide) = tan -1
(B/C(wide))
α (tele) = tan -1
(B/C(tele))
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Pg. 2
Pg. 3 - 4
Pg. 5
Pg. 6
Brightness:
800x600
Focal Length: 21.6mm – 25.9mm
F/#:
Manual Zoom / Manual Focus
NEC Solutions (America), Inc.
VT470: 2000 ANSI lumens
VT570: 1300 ANSI lumens
VT575: 1500 ANSI lumens
VT670: 2100 ANSI lumens
VT676: 2500 ANSI lumens
1.7 – 2.0
4:3 Screen Formulas:
W = H x 4/3
H = W x 3/4
Screen Diagonal = W x 5/4
VT470/570/575/670/676
Visual Systems
v1.5
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