NEC LT220 Series User manual

NEC Solutions (America), Inc.
VisualSystems
LT220 Installation Guide
Desktop and Ceiling Mount
D= 0.1671H - 0.011
v3.0
www.necvisualsystems.com Page 1 of 7
Contents
Product Description, Lens Specs, Notes and Formulas Page 1
Projection Distances and Screen Sizes
Ceiling Mount Installation Page 2
DesktopSetup Page 3
Cabinet Dimensions
Top, Front and Right Side Page 4
Bottom, Back and Left Side Page 5
Ceiling Mount Dimensions Page 6
Control Codes Page 7
ProductDescription
Type: Single chip DMDTM projector Dimensions: 10.24”(W) x 4.74”(H) x 11.81”(D)
Native Resolution: 800 x 600 (SVGA) Weight: 6.5 lbs
Brightness: 2000 ANSI Lumens
Lens Specifications
Throw Ratio: 2.0 - 2.5:1(approx.) Focal Length: 28.4mm – 34.0mm
Offset Angle: 12.3 °-14.8 ° (approx.) F/#: 2.2 – 2.5
Screen Sizes: 30”-500” Manual Focus/Manual Zoom
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.
 The ceiling must be strong enough to support the projector and the installation must be in accordance with any local
building codes.
• All calculations are based on 4:3 aspect ratio.
• 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)
Definitions:
H= Horizontal Screen Width (4:3)
V= Vertical Screen Height (4:3)
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= Throw Angle
Projection Formulas: Screen Formulas (4:3):
B= 0.5421H – 0.011 H= Screen Diagonal x 4/5
C(wide) = 2.0656H – 1.586 V= Screen Diagonal x 3/5
C(tele) = 2.5001H – 1.016 Screen Diagonal = H x 5/4
α(wide) = tan-1 (B/C(wide))
α(tele) = tan-1 (B/C(tele))

NEC Solutions (America), Inc.
VisualSystems
LT220 Installation Guide
Desktop and Ceiling Mount v3.0
www.necvisualsystems.com Page 2 of 7
Projection Distance and Screen Size for Ceiling Mount
The following shows the proper relative position of the projector and screen. Refer to the table for installation data.
Distances are in inches. For millimeters multiply by 25.4.
Ceiling Mount Installation
C
Throw Distance
D
Screen Top
B
α
Screen Ctr
Lens Ctr
2.9"
Lens Offset from
6.8"
*7.2" pipe base
*5.6" flush base
Mount Center
*See page 6 for mount base info
Distance Chart BD
Diagonal Width(H) Height(V) wide - tele wide - tele
inches inches inches inches inches
30 24 18 13.0 48.0 - 59.0 4.0 15.2 - 12.4
40 32 24 17.3 64.5 - 79.0 5.3 15.0 - 12.4
60 48 36 26.0 97.6 - 119.0 8.0 14.9 - 12.3
67 53.6 40.2 29.0 109.1 - 133.0 8.9 14.9 - 12.3
72 57.6 43.2 31.2 117.4 - 143.0 9.6 14.9 - 12.3
84 67.2 50.4 36.4 137.2 - 167.0 11.2 14.9 - 12.3
90 72 54 39.0 147.1 - 179.0 12.0 14.9 - 12.3
100 80 60 43.4 163.7 - 199.0 13.4 14.8 - 12.3
120 96 72 52.0 196.7 - 239.0 16.0 14.8 - 12.3
150 120 90 65.0 246.3 - 299.0 20.0 14.8 - 12.3
180 144 108 78.1 295.9 - 359.0 24.1 14.8 - 12.3
210 168 126 91.1 345.4 419.0 28.1 14.8 12.3
240 192 144 104.1 395.0 479.0 32.1 14.8 12.3
270 216 162 117.1 444.6 539.0 36.1 14.8 12.3
300 240 180 130.1 494.2 599.0 40.1 14.7 12.3
350 280 210 151.8 576.8 699.0 46.8 14.7 12.3
400 320 240 173.5 659.4 799.0 53.5 14.7 12.2
450 360 270 195.1 742.0 899.0 60.1 14.7 12.2
500 400 300 216.8 824.7 - 999.0 66.8 14.7 - 12.2
Screen Size (4:3) C
inches
α
degrees
Note: For screen sizes not indicated on the projection tables, use the formulas on page 1.

NEC Solutions (America), Inc.
VisualSystems
LT220 Installation Guide
Desktop and Ceiling Mount v3.0
www.necvisualsystems.com Page 3 of 7
Projection Distance and Screen Size for Desktop
The following diagram shows the relationship between projector position and the screen.
Distances are in inches. For millimeters multiply by 25.4.
Desktop Setup
C
Throw Distance
D
Screen Bottom
B
α
Screen Ctr
Lens Ctr
3.27"
Distance Chart BD
Diagonal Width(H) Height(V) wide - tele wide - tele
inches inches inches inches inches
30 24 18 13.0 48.0 - 59.0 4.0 15.2 - 12.4
40 32 24 17.3 64.5 - 79.0 5.3 15.0 - 12.4
60 48 36 26.0 97.6 - 119.0 8.0 14.9 - 12.3
67 53.6 40.2 29.0 109.1 - 133.0 8.9 14.9 - 12.3
72 57.6 43.2 31.2 117.4 - 143.0 9.6 14.9 - 12.3
84 67.2 50.4 36.4 137.2 - 167.0 11.2 14.9 - 12.3
90 72 54 39.0 147.1 - 179.0 12.0 14.9 - 12.3
100 80 60 43.4 163.7 - 199.0 13.4 14.8 - 12.3
120 96 72 52.0 196.7 - 239.0 16.0 14.8 - 12.3
150 120 90 65.0 246.3 - 299.0 20.0 14.8 - 12.3
180 144 108 78.1 295.9 - 359.0 24.1 14.8 - 12.3
210 168 126 91.1 345.4 419.0 28.1 14.8 12.3
240 192 144 104.1 395.0 479.0 32.1 14.8 12.3
270 216 162 117.1 444.6 539.0 36.1 14.8 12.3
300 240 180 130.1 494.2 599.0 40.1 14.7 12.3
350 280 210 151.8 576.8 699.0 46.8 14.7 12.3
400 320 240 173.5 659.4 799.0 53.5 14.7 12.2
450 360 270 195.1 742.0 899.0 60.1 14.7 12.2
500 400 300 216.8 824.7 - 999.0 66.8 14.7 - 12.2
Screen Size (4:3) C
inches
α
degrees
Note: For screen sizes not indicated on the projection tables, use the formulas on page 1.

NEC Solutions (America), Inc.
VisualSystems
LT220 Installation Guide
Desktop and Ceiling Mount
O
O
2.756
3.169
3.268
4.213
4.724
4.094
3.622
11.811
10.827
10.236
2.244
2.520
2.894
3.268
1.398
2.303
7.362
VENTILATION
VENTILATION
v3.0
www.necvisualsystems.com Page 4 of 7
Cabinet Dimensions
The following diagrams show the cabinet dimensions for the LT220.
Dimensions are in inches. For millimeters multiply by 25.4.

NEC Solutions (America), Inc.
VisualSystems
LT220 Installation Guide
Desktop and Ceiling Mount
FOR CEILING MOUNT
3 - M4x10 2.559 4.213
1.594
7.283
2.303
8.799 0.984
VENTILATION
SECURITY SLOT
v3.0
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Cabinet Dimensions (continued)
The following diagrams show the cabinet dimensions for the LT220.
Dimensions are in inches. For millimeters multiply by 25.4.

NEC Solutions (America), Inc.
VisualSystems
LT220 Installation Guide
Desktop and Ceiling Mount
3.54
8.12
0.59
4.00
4.47
3.75
Cable Management
1.5" NPT
7.52
Threaded Pipe Base
3.50
7.52
3.99
8.12
2.38
0.59
2.84
Flush Base
0.50
1.75
1.99
1.99
3.99
v3.0
www.ne Page 6 of 7cvisualsystems.com
Optional Ceiling Mount Dimensions (Model #: LT60CM)
The following diagrams show ceiling mount dimensions for the LT220.
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.

NEC Solutions (America), Inc.
VisualSystems
LT220 Installation Guide
Desktop and Ceiling Mount v3.0
www.necvisualsystems.com Page 7 of 7
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
12
345
678
To TxD of PC
To GND 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.