NEC Display Solutions of America, Inc.WTIW77™ Installation Guide v1.1www.necdisplay.com WTIW77 Page 1 of 10ContentsProduct Description, Lens Specs, Notes and Formulas Page 1Diagrams and Distance ChartsWall Mounted Side View Installation Page 2Wall Mounted Front View Installation Page 3Whiteboard DimensionsFront Page 4Back and Left Side Page 5Cabinet DimensionsFront, Top, Mirror Opened and Mirror Closed Page 6Back, Right Side and Bottom Page 7Optional Wall Mount Dimensions Page 8Control Codes Page 9Product DescriptionType: Whiteboard Dimensions: 62.0”(W) x 78.0”(H) x 30.9”(D)1 chip DMDTM Lens-less projector Weight: 92.1 lbsNative Resolution: 1024 x 768 (1024x576 for 16:9 screens) Screen Range: 77” Diagonal (4:3)Brightness: 2000 lumensScreen/Aspect Ratio_Both 4:3 and 16:9 screens are fully supported with proper aspect ratio control for both type sources using NEC developedscaling technology. By selecting the screen type in the menus, Aspect Ratio control is reconfigured for that screen type.Notes• For screen sizes not indicated on the projection charts, use the formulas below.If the figures on the tables do not match the results of formulas, use the figures in the table.• All calculations are based on 4:3 aspect ratio.• Distances are in inches, for millimeters multiply by 25.4.• Distances may vary ±5%.FormulasThe Projection Formulas use the image width for calculation. Image width is the same for all aspect ratios, only vertical image sizevaries. For proper projector placement, determine the image width for a desired screen size. Use the Screen Formulas below tocalculate all screen dimensions. Plug the screen width in for “W” in the Projection Formulas.Refer to the diagrams and charts for popular screen sizes on page 2 and 3.Definitions: 4:3 Screen Formulas:W = Screen width W = H x 4/3H = Screen height H = W x 3/4B = Vertical distance between projector foot and screen center Screen Diagonal = W x 5/4C = Throw distanceD = Vertical distance between projector foot and screen bottom(screen top for ceiling mounted application) 16:9 Screen Formulas:W = H x 16/9H = W x 9/16Projection Formulas: Screen Diagonal = W x 18.358/16B = 0.6882W + 3.935C = 0.4874W - 13.056D(4:3) = 0.3132W + 3.935D(16:9) = 0.407W + 3.935Vertical Position for a 16:9 screen: The Vertical Position adjustment moves the 16:9 image up and down in the unused portion ofthe 4:3 DLP panel. This adjustment is only available when the projector is set for 16:9 in the “Screen” menu. The range of VerticalPosition is dependent on aspect ratio and 3D Reform used. If 3D Reform is not used, the approximate range of vertical position is+/-0.167H (H=Screen Height) when using a 16:9 screen. (See “Screen Type” and “Position” in user manual)