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NEC MultiSync LT245 Installation Manual
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NEC MultiSync LT245 Installation Manual

NEC MultiSync LT245 Installation Manual

Nec multisync lt245: installation guide
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Table of Contents

See also: User Manual , Network Manual
LT245 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

Product Description

TM
Type:
1chip DMD
Resolution:
1024 x 768 (4:3)
1024 x 576 (16:9)
Brightness:
2200 ANSI lumens

Lens Specifications

Throw Ratio: 1.5 - 1.9:1(for 100" diagonal)
Offset Angle: 15.7°-18.7° (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 = 0.5248W - 0.053
C (wide) = 1.5692W – 1.978
C (tele) = 1.8836W – 1.9
D(4:3) = 0.1498W - 0.053
D(16:9) = 0.24355W - 0.053
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 12.40"(D)
Weight:
7.1 lbs
Focal Length: 22.1mm – 26.5mm
F/#:
2.2 – 2.5
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
LT245
Page 1 of 7
v1.1

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Summary of Contents for NEC MultiSync LT245

  • Page 1: Product Description

    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.
  • Page 2 Diagrams and Distance Charts for 4:3 Screens The following diagrams show the relationship between projector position and the screen. Refer to the chart below for data. Distances are in inches. For millimeters multiply by 25.4. Ceiling Mounted Lens Ctr Screen Ctr...
  • Page 3 Diagrams and Distance Charts for 16:9 Screens The following diagram shows the relationship between projector position and the screen. Refer to the chart below for data. Distances are in inches. For millimeters multiply by 25.4. Ceiling Mounted Lens Ctr Screen Ctr...

  • Page 4: Cabinet Dimensions

    Cabinet Dimensions The following drawings show the cabinet dimensions. Dimensions are in inches. For millimeters multiply by 25.4. www.necvisualsystems.com LT245 Page 4 of 7...
  • Page 5 Cabinet Dimensions (continued) The following drawings show the cabinet dimensions. Dimensions are in inches. For millimeters multiply by 25.4. www.necvisualsystems.com LT245 Page 5 of 7...
  • Page 6 Optional Ceiling Mount Dimensions (Model #: LT65CM) The following drawings show ceiling mount dimensions. Dimensions are in inches. For millimeters multiply by 25.4. The mount accommodates a 1.5” NPT treaded pipe extension or two 3/8”-16 threaded rod extensions. Mount adjustments include roll, pitch and yaw. Contact Peerless Industries for mount accessories at (800) 865-2112.

  • Page 7: Input Panel

    NOTE 1: For LT265GOV, it is recommended to set Standby Mode to ‘Normal’ in the Setup menu for best Power ON response. NOTE 2: Pins 2, 3, 5, 6 and 8 are used inside the projector.. NOTE 3: For long cable runs it is recommended to set communication speed within projector menus to 9600 bps. www.necvisualsystems.com...

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