NEC VT676 VT470/570/670/575/676 IG - Page 1

NEC Solutions (America), Inc. Visual Systems VT470/570/575/670/676 Installation Guide Ceiling Mounted and Desktop v1.5 Contents Product Description, Lens Specs, Notes and Formulas Diagrams and Distance Charts Cabinet Dimensions Ceiling Mount Dimensions Input Panel and Control Codes Pg. 1 Pg. 2 Pg. 3 - 4 Pg. 5 Pg. 6 Product Description Type: 3 panel LCD projector, 0.7" p-Si TFT (VT670 w/MLA) Resolution: VT470: 800x600 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) Brightness: VT470: VT570: VT575: VT670: VT676: 2000 ANSI lumens 1300 ANSI lumens 1500 ANSI lumens 2100 ANSI lumens 2500 ANSI lumens Focal Length: 21.6mm - 25.9mm F/#: 1.7 - 2.0 Manual Zoom / Manual Focus Notes ƒ For screen sizes not indicated on the projection charts, use the formulas below. ƒ If a value in a chart does not match the results of the formulas, use the values in the chart. ƒ The ceiling must be strong enough to support the projector and the installation must be in accordance with any local building codes. ƒ All formulas are based on a 4:3 aspect ratio and screen. ƒ Distances are in inches, for millimeters multiply by 25.4. ƒ 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 4:3 Screen Formulas: W = H x 4/3 H = W x 3/4 Screen Diagonal = W x 5/4 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)) www.necvisualsystems.com VT470/570/575/670/676 Page 1 of 6