Nec LT260, LT260K user Manual

NEC Solutions (America), Inc.

Visual Systems

LT260/260K Installation Guide

Desktop and Ceiling Mount v3.5

Contents

Product Description, Lens Specs, Notes and Formulas Page 1
Projection Distances and Screen Sizes

Ceiling Mount Installation

Desktop Setup

Cabinet Dimensions
Top, Front and Right Side
Bottom, Back and Left Side

Ceiling Mount Dimensions
Control Codes

Product Description

Type: 1 chip DLPTM projector Dimensions: 10.24”(W) x 4.74”(H) x 11.81”(D)
Native Resolution: 1024 x 768 (XGA) Weight: 6.5 lbs
Brightness: LT260: 2100 ANSI

LT260K: 2400 ANSI

Lens Specifications

Throw Ratio: 2.0 - 2.4:1(approx.) Focal Length: 28.4mm – 34.0mm
Offset Angle: 12.3 °-14.9
Screen Sizes: 30”-500” Manual Focus/Manual Zoom

°

(approx.) F/#: 2.2 – 2.5

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.
 4:3 sources can be displayed on a 16:9 screen without vertical “squeezing”, see “Aspect Ratio” in the user manual.
 Distances are in inches, for millimeters multiply by 25.4.

• Distances may vary ±5%.

Formulas

Units: Inches (for millimeters multiply final number by 25.4)

Projection Formulas:
B = 0.5265H – 0.013 H = Horizontal Screen Width (4:3)
C (wide) = 2.0062H – 1.764 V = Vertical Screen Height (4:3)
C (tele) = 2.4281H – 1.260 B = Vertical distance between lens center and screen center
D = 0.1515H - 0.013 C = Throw distance

α (wide) = tan
α (tele) = tan

α = Throw Angle

Screen Formulas (4:3):
H = Screen Diagonal x 4/5
V = Screen Diagonal x 3/5
Screen Diagonal = H x 5/4

-1

-1

Definitions:

(B/C(wide)) D = Vertical distance between lens center and screen top

(B/C(tele)) (screen bottom for desktop application)

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Page 7

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Ceiling Mounted Installation

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.

Lens Ctr

D

Screen Top

B

Screen Ctr

*See page 6 for mount base info

Distance Chart (for popular screen sizes)

Diagonal Width(H) Height(V) wide - tele wide - tele

Note: For screen sizes not indicated on the projection tables, use the formulas on page 1.

Screen Size (4:3) C

inches inches inches inches inches

30 24 18 12.6 46.4 - 57.0 3.6 15.2 - 12.5

40 32 24 16.8 62.4 - 76.4 4.8 15.1 - 12.4

60 48 36 25.3 94.5 - 115.3 7.3 15.0 - 12.4

67 53.6 40.2 28.2 105.8 - 128.9 8.1 14.9 - 12.3

72 57.6 43.2 30.3 113.8 - 138.6 8.7 14.9 - 12.3

84 67.2 50.4 35.4 133.1 - 161.9 10.2 14.9 - 12.3

90 72 54 37.9 142.7 - 173.6 10.9 14.9 - 12.3

100 80 60 42.1 158.7 - 193.0 12.1 14.9 - 12.3

120 96 72 50.5 190.8 - 231.8 14.5 14.8 - 12.3

150 120 90 63.2 239.0 - 290.1 18.2 14.8 - 12.3

180 144 108 75.8 287.1 - 348.4 21.8 14.8 - 12.3

210 168 126 88.4 335.3 406.7 25.4 14.8 12.3

240 192 144 101.1 383.4 464.9 29.1 14.8 12.3

270 216 162 113.7 431.6 523.2 32.7 14.8 12.3

300 240 180 126.3 479.7 581.5 36.3 14.8 12.3

350 280 210 147.4 560.0 678.6 42.4 14.7 12.3

400 320 240 168.5 640.2 775.7 48.5 14.7 12.3

450 360 270 189.5 720.5 872.9 54.5 14.7 12.3

500 400 300 210.6 800.7 - 970.0 60.6 14.7 - 12.2

C

*7.2" pipe base
*5.6" flush base

Throw Distance

BD

inches

α

2.9"

α

degrees

6.8"

Lens Offset from
Mount Center

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Desktop Setup

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.

C

Screen Ctr

B

Screen Bottom

D

Lens Ctr

Distance Chart (for popular screen sizes)

Diagonal Width(H) Height(V) wide - tele wide - tele

Note: For screen sizes not indicated on the projection tables, use the formulas on page 1.

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Screen Size (4:3) C

inches inches inches inches inches

30 24 18 12.6 46.4 - 57.0 3.6 15.2 - 12.5

40 32 24 16.8 62.4 - 76.4 4.8 15.1 - 12.4

60 48 36 25.3 94.5 - 115.3 7.3 15.0 - 12.4

67 53.6 40.2 28.2 105.8 - 128.9 8.1 14.9 - 12.3

72 57.6 43.2 30.3 113.8 - 138.6 8.7 14.9 - 12.3

84 67.2 50.4 35.4 133.1 - 161.9 10.2 14.9 - 12.3

90 72 54 37.9 142.7 - 173.6 10.9 14.9 - 12.3

100 80 60 42.1 158.7 - 193.0 12.1 14.9 - 12.3

120 96 72 50.5 190.8 - 231.8 14.5 14.8 - 12.3

150 120 90 63.2 239.0 - 290.1 18.2 14.8 - 12.3

180 144 108 75.8 287.1 - 348.4 21.8 14.8 - 12.3

210 168 126 88.4 335.3 406.7 25.4 14.8 12.3

240 192 144 101.1 383.4 464.9 29.1 14.8 12.3

270 216 162 113.7 431.6 523.2 32.7 14.8 12.3

300 240 180 126.3 479.7 581.5 36.3 14.8 12.3

350 280 210 147.4 560.0 678.6 42.4 14.7 12.3

400 320 240 168.5 640.2 775.7 48.5 14.7 12.3

450 360 270 189.5 720.5 872.9 54.5 14.7 12.3

500 400 300 210.6 800.7 - 970.0 60.6 14.7 - 12.2

Throw Distance

α

3.27"

BD

inches

α

degrees

Cabinet Dimensions

The following diagrams show the cabinet dimensions for the LT260.
Dimensions are in inches. For millimeters multiply by 25.4.

4.094

3.622

10.827

11.811

2.756

3.169

3.268

4.213

VENTILATION

10.236

4.724

VENTILATION

2.303

7.362

1.398

2.244

0

2

.5

2

O

4

9

8

.

2

O

3.268

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Cabinet Dimensions (continued)

The following diagrams show the cabinet dimensions for the LT260.
Dimensions are in inches. For millimeters multiply by 25.4.

VENTILATION

FOR CEILING MOUNT

3 - M4x10

0.984

8.799

2.559

4.213

1.594

7.283

SECURITY SLOT

2.303

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Optional Ceiling Mount Dimensions (Model #: LT60CM)

The following diagrams show ceiling mount dimensions for the LT260.
Dimensions are in inches. For millimeters multiply by 25.4.

The LT60CM comes with a threaded pipe base and a flush base for minimal mount height.

3.54

3

7.52
Threaded Pipe Base

3.75

1.5" NPT

Cable Management

4.00

8.12

.

7

2

5

0

5

.

5
7

.
1

9
9

.
1

9
9

.

3
9
9

.
1

0

.

5

0

.

3

9

9

8
3

.
2

Flush Base

2

1

.

8

9
5

.
0

4.47

0.59

4
8

.
2

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Control Codes

Function Code Data

POWER ON 02H 00H 00H 00H 00H 02H

POWER OFF 02H 01H 00H 00H 00H 03H

INPUT SELECT RGB 1 02H 03H 00H 00H 02H 01H 01H 09H

INPUT SELECT RGB 2 02H 03H 00H 00H 02H 01H 02H 0AH

INPUT SELECT VIDEO 02H 03H 00H 00H 02H 01H 06H 0EH

INPUT SELECT S-VIDEO 02H 03H 00H 00H 02H 01H 0BH 13H

INPUT SELECT VIEWER 02H 03H 00H 00H 02H 01H 1FH 27H

PICTURE MUTE ON 02H 10H 00H 00H 00H 12H

PICTURE MUTE OFF 02H 11H 00H 00H 00H 13H

SOUND MUTE ON 02H 12H 00H 00H 00H 14H

SOUND MUTE OFF 02H 13H 00H 00H 00H 15H

ON SCREEN MUTE ON 02H 14H 00H 00H 00H 16H

ON SCREEN MUTE OFF 02H 15H 00H 00H 00H 17H

Cable Connection

Communication Protocol:

Baud Rate: 38400 bps
Data Length: 8 bits
Parity: No Parity
Stop Bit: One bit
X on/off: None
Communications: Full duplex

PC Control Connector (DIN-8P)

To RxD of PC

678

345

12

To GND of PC

To TxD of PC

NOTE 1: It is recommended to set the projector to “Idle Mode” 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.

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