NEC LT30 - INSTALLTION GUIDE Manuel utilisateur
NEC Solutions (America), Inc.
Visual Systems Division
LT30/35 Installation Guide
Ceiling Mounted and Desktop Rev 1.0
______________________________________________________________________________________________________________________
www.necvisualsystems.com LT30/35 Page 1 of 6
Contents
Product Description, Lens Specs, Notes and Formulas Pg 1
Diagrams & Distance Charts Pg 2
Cabinet Dimensions_____________ Pg 3
Ceiling Mount Dimensions _________ Pg 4
Input Panel and Control Codes Pg 5
Product Description
Type: .7 DDR DMD™ projector Dimensions: 10.24”(W) x 3.5”(H) x 8.2”(D)
Resolution: 1024x768 Weight: 4.4lbs
Brightness: LT30: 2600 ANSI Lumens
LT35: 3000 ANSI Lumens
Lens Specifications
Throw Ratio: 1.8 – 2.16:1 (for 100” diagonal) Focal Length: 25.7 – 30.8 mm
Offset Angle: 9.8° - 11.7° (for 100” diagonal) F/#: 2.4 – 2.6
Screen Sizes: 30” - 300” diagonal (4:3) Manual Zoom/Power Focus (w/autofocus)
Notes
For screen sizes not indicated on the projection tables, 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%.
Formulas
The Projection Formulas use the image width for calculation. For proper projection placement, determine the image width
for the desired screen size. Use the Screen Formulas below to calculate all screen dimensions. Plug in the width for “W” in
the Projection Formulas.
Refer to the diagrams and charts for popular screen sizes on page 2:
Definitions: 4:3 Screen Formulas:
W = Image Width W = H x 4/3
H = Image Height (size) H = W x 3/4
B = Vertical distance between lens center and screen center Screen Diagonal = W x 5/4
C = Throw distance
D = Vertical distance between lens center and screen top
(screen bottom for desktop application)
Projection Formulas:
B= 0.375W
C(wide) = 1.831W – 2.076
C (tele) = 2.19W – 2.08
α(wide) = tan¯¹ (B/C(wide))
α(tele) = tan¯¹ (B/C(tele))
NEC Solutions (America), Inc.
Visual Systems Division
LT30/35 Installation Guide
Ceiling Mounted and Desktop Rev 1.0
______________________________________________________________________________________________________________________
www.necvisualsystems.com LT30/35 Page 2 of 6
Diagrams and Distance Charts
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
B
C
Lens Ctr
Screen Ctr
Throw Distance
Screen Top
5"
4.75"
Lens Offset From
Mount Pipe
3.35"
Desktop
B
C
Lens Ctr
Screen Ctr
Throw Distance
Screen Bottom
2.38"
Distance Chart for popular 4:3
screens
Screen Size (4:3)
Diag W H
B C
wide - tele
D α
wide - tele
inches inches inches inches inches inches degrees
30 24 18 9 42 - 51 - 12.1 -10.0
60 48 36 18 86 - 104 - 11.8 - 9.9
72 57.6 43.2 22 104 - 125 - 11.7 - 9.8
84 67.2 50.4 25 121 - 146 - 11.7 - 9.8
90 72 54 27 130 - 156 - 11.7 - 9.8
100 80 60 30 145 - 174 - 11.7 - 9.8
120 96 72 36 174 - 209 - 11.7 - 9.8
150 120 90 45 218 - 261 - 11.7 - 9.8
180 144 108 54 262 - 314 - 11.7 - 9.8
200 160 120 60 291 - 349 - 11.6 - 9.7
260 200 150 78 379 - 454 - 11.6 - 9.7
300 240 180 90 438 - 524 - 11.6 - 9.7
Note: For screen sizes not indicated on the
projection tables, use the formulas on page 1.
NEC Solutions (America), Inc.
Visual Systems Division
LT30/35 Installation Guide
Ceiling Mounted and Desktop Rev 1.0
______________________________________________________________________________________________________________________
www.necvisualsystems.com LT30/35 Page 3 of 6
Cabinet Dimensions
The following drawings show the cabinet dimensions.
Dimensions are in inches. For millimeters multiply by 25.4.
8.81
8.21
3.50
3.94
2.36
3.35
10.24
8.34 (LENS MIN)
8.46 (LENS MAX)
6.93
0.24
1.77
ventilation
3.6
ventilation AC inlet
Zoom Control
1.35
1.94
NEC Solutions (America), Inc.
Visual Systems Division
LT30/35 Installation Guide
Ceiling Mounted and Desktop Rev 1.0
______________________________________________________________________________________________________________________
www.necvisualsystems.com LT30/35 Page 4 of 6
Cabinet Dimensions (continued)
The following drawings show the cabinet dimensions.
Dimensions are in inches. For millimeters multiply by 25.4.
4.552.09
0.63
4.13
4.13
0.79
3-M4x8max
for mount
ventilation
security slot
2.09
2.09
NEC Solutions (America), Inc.
Visual Systems Division
LT30/35 Installation Guide
Ceiling Mounted and Desktop Rev 1.0
______________________________________________________________________________________________________________________
www.necvisualsystems.com LT30/35 Page 5 of 6
Optional Ceiling Mount Dimensions (Model #: LT30CM )
The following drawings show the ceiling mount dimensions.
Dimensions are in inches. For millimeters multiply by 25.4.
1.5 NPT
8.813
6.75
2.95
2.58
NEC Solutions (America), Inc.
Visual Systems Division
LT30/35 Installation Guide
Ceiling Mounted and Desktop Rev 1.0
______________________________________________________________________________________________________________________
www.necvisualsystems.com LT30/35 Page 6 of 6
Input Panel
COMPUTER IN VIDEO IN S-VIDEO IN AUDIO IN PC CONTROL
PC Control Codes
Function CodeData
POWER ON 02H 00H 00H 00H 00H 02H
POWER OFF 02H 01H 00H 00H 00H 03H
INPUT SELECT CCOMPUTER 02H 03H 00H 00H 02H 01H 01H 09H
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 DVI (DIGITAL) 02H 03H 00H 00H 02H 01H 1AH 22H
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
Note: Contact your NEC rep for codes not listed.
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
NOTE 1 : Pins 2, 3, 5, and 6 are used inside the projector.
NOTE 2: For long cable runs it is recommended to set communication speed within the projector to 9600 bps.
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