NEC VT770 Series User manual

NEC Solutions (America), Inc.
VisualSystems
VT770 Installation Guide
Desktop and Ceiling Mounted v1.2
Contents
Product Description, Lens Specs
www.necvisualsystems.com VT770 Page 1 of 7
Screen/Aspect Ratio, Notes and Formulas Pg. 1
Diagrams and Distance Charts; 4:3 Screens Pg. 2
16:9Screens Pg. 3
Cabinet Dimensions; Top, Front and Right Pg. 4
Bottom, Back and Left Pg. 5
Ceiling Mount Dimensions Pg. 6
Input Panel and Control Codes Pg. 7
ProductDescription
Type: 3 panel LCD projector; Brightness: 3000 ANSI Lumens
0.8”p-SiTFTw/MLA Dimensions: 13.4”(W) x 4.2”(H) x 10.2”(D)
Resolution: 1024x768 (4:3) Weight: 7.9 lbs
1024x576(16:9)
Lens Specifications
Throw Ratio: 1.5 - 1.8:1 (for 100” diagonal) Focal Length: 24.0mm – 28.8mm
Offset Angle: 9.6°-11.5° (for 100” diagonal) F/#: 1.7 – 2.0
Screen Sizes: 25”-300” Manual Zoom / Manual Focus
ScreenType/AspectRatioControl
Both 16:9 and 4:3 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.
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.
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: 4:3 Screen Formulas:
W= Image Width W=Hx4/3
H= Image Height (Size) H=Wx3/4
B= Vertical distance between lens center and screen center Screen Diagonal = W x 5/4
C=Throwdistance
D= Vertical distance between lens center and screen bottom
(screen top for ceiling mounted application) 16:9 Screen Formulas:
W=Hx16/9
H=Wx9/16
Projection Formulas: Screen Diagonal = W x 18.358/16
B=0.3W
C(wide) = 1.4926W – 1.823 Vertical Position for a 16:9 screen: The Vertical Position adjustment moves
C(tele) = 1.8056W – 1.819 the 16:9 image up and down in the unused portion of the 4:3 panel. This
D(4:3) = 0.075W adjustment is only available when the projector is set for ‘16:9’ in the
D(16:9) = 0.01875W ‘Screen’ menu. The range of Vertical Position is dependent on aspect ratio
α(wide) = tan-1 (B/C(wide)) and 3D Reform used. If 3D Reform is not used, the approximate range of Vertical
α(tele) = tan-1 (B/C(tele)) Position is +/-0.167H (H=Screen Height) when using a 16:9 screen.

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 Installation
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Desktop Setup
α
C
Throw Distance
Screen Bottom
Lens Ctr
Screen Ctr
B
D2.7"
α
C
Throw Distance
Screen Top
Lens Ctr
Screen Ctr
B
D*5.7" w/ceiling plate
*6.6" w/pipe connector
4.9"
3.2"
mount pipe
Lens offset from
Distance chart for popular 4:3 screens BD
Diag W H wide
-
tele (4:3) wide
-
tele
inches inches inches inches inches
25 20 15 6.0 28.0
-
34.3 1.5 12.1
-
9.9
60 48 36 14.4 69.8
-
84.8 3.6 11.7
-
9.6
72 57.6 43.2 17.3 84.2
-
102.2 4.3 11.6
-
9.6
84 67.2 50.4 20.2 98.5
-
119.5 5.0 11.6
-
9.6
90 72 54 21.6 105.6
-
128.2 5.4 11.6
-
9.6
100 80 60 24.0 117.6
-
142.6 6.0 11.5
-
9.6
120 96 72 28.8 141.5
-
171.5 7.2 11.5
-
9.5
150 120 90 36.0 177.3
-
214.9 9.0 11.5
-
9.5
180 144 108 43.2 213.1
-
258.2 10.8 11.5
-
9.5
200 160 120 48.0 237.0
-
287.1 12.0 11.4
-
9.5
250 200 150 60.0 296.7
-
359.3 15.0 11.4
-
9.5
300 240 180 72.0 356.4
-
431.5 18.0 11.4
-
9.5
Screen Size (4:3) C
inches
α
degrees
Note: For screen sizes not indicated on the chart,
use the formulas on page 1.

16:9 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 Installation
C
Throw Distance
Screen Top
Lens Ctr
Screen Ctr
B
D*5.7" w/ceiling plate
*6.6" w/pipe connector
4.9"
3.2"
mount pipe
Lens offset from
α
Desktop Setup
α
C
Throw Distance
Screen Bottom
Lens Ctr
Screen Ctr
B
D2.7"
Distance chart for popular 16:9 screens BD
Diag W H wide
-
tele (16:9) wide
-
tele
inches inches inches inches inches
82 72 40.5 21.6 105.6
-
128.2 1.4 11.6
-
9.6
92 80 45 24.0 117.6
-
142.6 1.5 11.5
-
9.6
100 87 49 26.1 128.0
-
155.3 1.6 11.5
-
9.5
106 92 52 27.6 135.5
-
164.3 1.7 11.5
-
9.5
110 96 54 28.8 141.5
-
171.5 1.8 11.5
-
9.5
119 104 58.5 31.2 153.4
-
186.0 2.0 11.5
-
9.5
123 107 60 32.1 157.9
-
191.4 2.0 11.5
-
9.5
133 116 65 34.8 171.3
-
207.6 2.2 11.5
-
9.5
135 118 66 35.4 174.3
-
211.2 2.2 11.5
-
9.5
159 139 78 41.7 205.6
-
249.2 2.6 11.5
-
9.5
161 140 79 42.0 207.1
-
251.0 2.6 11.5
-
9.5
Screen Size (16:9) C
inches
α
degrees
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.
Note: For screen sizes not indicated on the chart,
use the formulas on page 1.
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Cabinet Dimensions
The following drawings show the cabinet dimensions.
Dimensions are in inches. For millimeters multiply by 25.4.
2.69 (foot)
2.24 (mount)
1.62
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Cabinet Dimensions (continued)
The following drawings show the cabinet dimensions.
Dimensions are in inches. For millimeters multiply by 25.4.
4M*8 MAX
for mount
4M*8 MAX
for mount 4M*8 MAX
for mount
13.39
4.40 (mount)
1.28
3.02 (mount) 6.99 (mount)
1.57
3.27
10.79 (foot)
1.97(foot)
8.11 (foot)
7.05(foot)
0.87(foot)
0.67
5.59 (mount)
0.44 4.31 (foot)
3.86 (mount)
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Optional Ceiling Mount Dimensions (Model #: VT65CM)
The following drawings show ceiling mount dimensions.
Dimensions are in inches. For millimeters multiply by 25.4.
The VT65CM comes with a threaded pipe connector and a ceiling plate for flush mounting and minimal height.
pipe connector
4.33
6.19
10.74
1.5" NPT
0.40 DIA
3.45
10.74
5.003.00
ceiling plate
6.19
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Input Panel
Control Codes
Function CodeData
POWER ON 02H 00H 00H 00H 00H 02H
POWER OFF 02H 01H 00H 00H 00H 03H
INPUT SELECT COMPUTER 1 02H 03H 00H 00H 02H 01H 01H 09H
INPUT SELECT COMPUTER 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 COMPONENT 02H 03H 00H 00H 02H 01H 12H 1AH
INPUT SELECT VIEWER 02H 03H 00H 00H 02H 01H 1FH 27H
PICTUREMUTEON 02H10H00H 00H 00H 12H
PICTURE MUTE OFF 02H 11H 00H 00H 00H 13H
SOUND MUTE ON 02H 12H 00H 00H 00H 14H
SOUNDMUTEOFF 02H13H00H 00H 00H 15H
ON SCREEN MUTE ON 02H 14H 00H 00H 00H 16H
ON SCREEN MUTE OFF 02H 15H 00H 00H 00H 17H
ASPECT RATIO (4:3 Screen) 4:3 03H 10H 00H 00H 05H 18H 00H 00H 00H 00H 30H
Letterbox 03H 10H 00H 00H 05H 18H 00H 00H 01H 00H 31H
Widescreen 03H 10H 00H 00H 05H 18H 00H 00H 02H 00H 32H
Crop 03H10H00H 00H 05H 18H 00H 00H 03H 00H 33H
ASPECT RATIO (16:9 Screen) 4:3 Window 03H 10H 00H 00H 05H 18H 00H 00H 00H 00H 30H
Letterbox 03H 10H 00H 00H 05H 18H 00H 00H 01H 00H 31H
Widescreen 03H 10H 00H 00H 05H 18H 00H 00H 02H 00H 32H
4:3Fill 03H10H00H 00H 05H 18H 00H 00H 04H 00H 34H
AUTOADJUST 02H0FH 00H 00H 02H 05H 00H 18H
Note: Contact your NEC rep for codes not listed.
Cable Connection
Communication Protocol: PC Control Connector (D-Sub 9p)
Baud Rate: 38400 bps
12345
6789
To GND of PC
To RxD of PC
To TxD of PC
To CTS of PC
To RTS of PC
Data Length: 8 bits
Parity: No Parity
Stop Bit: One bit
X on/off: None
Communications: Full duplex
NOTE1: It is recommended to set the projector to “Idle Mode” in the Setup/Standby Mode menu for best Power ON response.
NOTE2: Pins 1, 4, 6, and 9 are used inside the projector.
NOTE3: Jumper “Request to send” and “Clear to Send” together on both ends of the cable to simplify cable connection.
NOTE4: For long cable runs it is recommended to set communication speed to 9600 bps in the Setup menu.
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