NEC LT265 Installation Manual

LT265 Installation Guide

Used with 4:3 and 16:9 screens

Contents

Product Description, Lens Specs,

Screen/Aspect Ratio, Notes and Formulas

Diagrams and Distance Charts,

Cabinet Dimensions, Top, Front and Right

Bottom, Back and Left

Ceiling Mount Dimensions

Input Panel and Control Codes

TM

Type:

1chip DMD

Resolution:

1024 x 768 (4:3)

1024 x 576 (16:9)

Brightness:

2500 ANSI lumens

Throw Ratio: 2.0 - 2.4:1(for 100" diagonal)

Offset Angle: 12.4°-14.9° (for 100" diagonal)

Screen Sizes: 30"-500" diagonal (4:3)

Screen/Aspect Ratio

Both 4:3 and 16:9 screens are fully supported with proper aspect ratio control for both type sources using NEC developed

scaling technology. By selecting the screen type in the menus, Aspect Ratio control is reconfigured for that screen type.

•

For a 4:3 screen; select "4:3" in the "Screen" menu for proper aspect ratio control of 4:3 and 16:9 sources.

•

For a 16:9 screen; select "16:9" in the "Screen" menu for proper aspect ratio control of 4:3 and 16:9 sources.

*Factory default "Screen" setting is "4:3".

Notes

For screen sizes not indicated on the projection charts, use the formulas below.

The ceiling must be strong enough to support the projector and the installation must be in accordance with any local

building codes.

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 and 3.

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 application).

α = Projection angle

Projection Formulas:

B = 0.5254W - 0.029

C (wide) = 1.9976W – 2.373

C (tele) = 2.4211W – 2.086

D(4:3) = 0.1504W - 0.029

D(16:9) = 0.24415W - 0.029

α (wide) = tan

-1

(B/C(wide))

α (tele) = tan

-1

(B/C(tele))

www.necvisualsystems.com

4:3 Screens

16:9 Screens

projector,

Vertical Position for a 16:9 screen: The Vertical Position adjustment moves the 16:9

image up and down in the unused portion of the 4:3 panel. This adjustment is only

available when the projector is set for '16:9' in the 'Screen' menu. The range of Vertical

Position 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.

Pg. 1

Pg. 2

Pg. 3

Pg. 4

Pg. 5

Pg. 6

Pg. 7

Color Wheel: 4 segment

Dimensions: 10.24"(W) x 4.84"(H) x 12.32"(D)

Weight:

6.4 lbs

Focal Length: 28.2mm – 33.6mm

F/#:

2.1 – 2.3

Manual Zoom / Focus

4:3 Screen Formulas:

W = H x 4/3

H = W x 3/4

Screen Diagonal = W x 5/4

16:9 Screen Formulas:

W = H x 16/9

H = W x 9/16

Screen Diagonal = W x 18.35756/16

NEC Solutions (America), Inc.

Visual Systems

LT265

Page 1 of 7

v1.1