NEC LT180 - LT 180 XGA DLP Projector User manual

www.necvisualsystems.com LT180 Page 1 of 7
zz NEC Solutions (America), Inc.
VisualSystemsDivision
LT180 Installation Guide
Floor and Ceiling Configuration v1.0
Contents
Product Description, Lens Specs, Screen/Aspect Ratio,
NotesandFormulas Pg 1
Diagrams & Distance Charts; Ceiling Mounted Pg 2
Floor 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: 1 chip DMDTM projector Color Wheel: 4 Segments (2x)
Resolution: 1024 x 768 Dimensions: 7.37”(W) x 5.24”(H) x 13.60”(D)
Brightness: 2000 ANSI Lumens Weight: 6.4lbs
ContrastRatio:1000:1
LensSpecifications
Throw Ratio: 1.37 - 1.63:1 (for 100” Diag) Manual Focus/Manual Zoom
Offset Angle: 10.5°- 12.4°(for 100” Diag) Focal Length: 19.7mm – 23.0mm l
Screen Sizes: 30”-200” diagonal (4:3) F/#: 2.0 – 2.48
Notes
•For screen sizes not indicated in 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. 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 & 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
Projection Formulas:
B= 0.2980W
C(wide) = 1.3908W – 1.967
C(tele) = 1.6511W – 1.945
α(wide) = tan-1 (B/C(wide))
α(tele) = tan-1 (B/C(tele))

www.necvisualsystems.com LT180 Page 2 of 7
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 Configuration
Note: Mount shown is NEC HT40CM.
Distance charts for popular 4:3 screens
Lens Ctr 5.5"
Throw Distance
Lens Offset from
Mount Center
1.5"
6.6"
C
B
D
α
Screen Top
Screen Ctr
BD
Diag W H wide
-
tele wide
-
tele
inches inches inches inches inches
30 24 18 7.2 31.4
-
37.7 1.8 12.8
-
10.7
60 48 36 14.3 64.8
-
77.3 3.7 12.4
-
10.5
72 57.6 43.2 17.2 78.1
-
93.2 4.4 12.4
-
10.4
84 67.2 50.4 20.0 91.5
-
109.0 5.2 12.3
-
10.4
90 72 54 21.5 98.2
-
116.9 5.5 12.3
-
10.4
100 80 60 23.8 109.3
-
130.1 6.2 12.3
-
10.4
120 96 72 28.6 131.5
-
156.6 7.4 12.3
-
10.4
150 120 90 35.8 164.9
-
196.2 9.2 12.2
-
10.3
180 144 108 42.9 198.3
-
235.8 11.1 12.2
-
10.3
200 160 120 47.7 220.6
-
262.2 12.3 12.2
-
10.3
Screen Size (4:3) C
inches
α
degrees

www.necvisualsystems.com LT180 Page 3 of 7
Diagrams and Distance Charts (cont.)
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.
Floor Configuration
Distance charts for popular 4:3 screens
Lens Ctr
Throw Distance
D
B
C
α
Screen Bottom
Screen Ctr
3.1"
BD
Diag W H wide
-
tele wide
-
tele
inches inches inches inches inches
30 24 18 7.2 31.4
-
37.7 1.8 12.8
-
10.7
60 48 36 14.3 64.8
-
77.3 3.7 12.4
-
10.5
72 57.6 43.2 17.2 78.1
-
93.2 4.4 12.4
-
10.4
84 67.2 50.4 20.0 91.5
-
109.0 5.2 12.3
-
10.4
90 72 54 21.5 98.2
-
116.9 5.5 12.3
-
10.4
100 80 60 23.8 109.3
-
130.1 6.2 12.3
-
10.4
120 96 72 28.6 131.5
-
156.6 7.4 12.3
-
10.4
150 120 90 35.8 164.9
-
196.2 9.2 12.2
-
10.3
180 144 108 42.9 198.3
-
235.8 11.1 12.2
-
10.3
200 160 120 47.7 220.6
-
262.2 12.3 12.2
-
10.3
Screen Size (4:3) C
inches
α
degrees

www.necvisualsystems.com LT180 Page 4 of 7
Cabinet Dimensions
The following drawings show the cabinet dimensions.
Dimensions are in inches. For millimeters multiply by 25.4.
13.60
5.24(from foot to button)
4.76
2.07 5.30
3.11
4.69
4.45
3.17Ø (focus)
13.27
0.02 (button)
4.94
4.49 (boss)
AUTO
ADJ.
SOURCE
MENU
SELECT
ENTER
EXIT

www.necvisualsystems.com LT180 Page 5 of 7
Cabinet Dimensions (continued)
The following drawings show the cabinet dimensions.
Dimensions are in inches. For millimeters multiply by 25.4.
M4x8 Max for Mount
M4x8 Max for Mount
M4x8 Max for Mount

ACIN `
PCCONTROL
COMPUTER IN
AUDIO IN
YCb/Pb
Cr/Pr
COMPONENT INVIDEO IN
L R AUDIO IN
S-VIDEO
MONITOR OUT
AUDIO OUT
8.05 (boss)
9.94 (foot)
1.24
(foot)
1.77(lens)
0.79
41
2.602.60
1.12
(boss)
1.61
(foot)
1.18
(boss)
3.86 (boss)
5.81 (boss)
0.33

www.necvisualsystems.com LT180 Page 6 of 7
Optional Ceiling Mount Dimensions (Model #: HT40CM)
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 [phone].
9.33
2.67
0.406
1.5" NPT
6.16
Standoffs
0.50
3.17

www.necvisualsystems.com LT180 Page 7 of 7
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 02H 03H 00H 00H 02H 01H 01H 09H
INPUT SELECT COMPONENT 02H 03H 00H 00H 02H 01H 11H 19H
INPUT SELECT VIDEO 02H 03H 00H 00H 02H 01H 06H 0EH
INPUT SELECT S-VIDEO 02H 03H 00H 00H 02H 01H 0BH 13H
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: Checksum (CKS) is already included in the commands above.
Note: Contact your NEC rep for codes not listed.
Cable Connection
Communication Protocol: PC Control Connector (DIN-8P)
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, 6 and 8 are used inside the projector.
NOTE 2 : For long cable runs it is recommended to set communication speed within projector menus to 9600 bps.
Digital Light Processing, DLP, Digital Micromirror Device and DMD are trademarks of Texas Instruments.
PC CONTROL COMPUTER IN
AUDIO IN
Y
Cb/Pb
Cr/Pr
COMPONENT IN VIDEO IN
L
R AUDIO IN
S-VIDEO
MONITOR OUT
AUDIO OUT
To RxD of PC
12
345
678
To TxD of PCTo GND of PC