6
INSTALLATION SET-UP INSTRUCTION
A:Distance between the lens and the screen center
D:Distance between the desk top and the screen center
Projection Distance and Screen Size for Desk Top
• The following shows the relative position relationship of the projector with the screen. See table below.
74.41
1890
23.94
608
85.51
2172
26.25
667
96.59
2453
28.55
725
107.68
2735
30.86
784
118.75
3016
33.16
842
140.91
3579
37.77
960
174.15
4423
44.68
1135
207.40
5268
51.59
1311
229.55
5830
56.19
1428
A
D
48"
(60")
Screen size H-Width
(4:3 Diagonal)
56"
(70")
64"
(80")
72"
(90")
80"
(100")
96"
(120")
120"
(150")
144"
(180")
160"
(200")
192"
(240")
216"
(270")
240"
(300")
NOTE:
• The projection distance is based on the screen width.
• Sizes not found between 48 (60) and 240 (300) inches are determined by the following formula.
Units=inches W"=Screen H-Width
Units=mm W"=Screen H-Width
A = [(5/18
2
W"
1
12.5)
2
4.99]
`
70.28
A = [(5/18
2
W"
1
12.5)
2
126.64]
`
1785
D = (0.208
2
A)
`
8.47
D = (0.208
2
A)
`
215
• When changing from ceiling mounting to desk top use, turn over the plate with the NEC trademark in the rear of the top cover.
Push the catch from the inside and remove the plate. Install it in the opposite manner.
inch
mm
inch
mm
273.86
6956
65.41
1662
307.10
7800
72.32
1837
340.36
8645
79.23
2013
Screen center
D
12
°
12
°
12
°
Desk top line
A
Line of sight
Desk Top System