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7
Positioning the projector
To determine where to position the projector, consider the size and shape of your
screen, the location of your power outlets, and the distance between the projector
and the rest of your equipment. Here are some general guidelines:
• Position the projector on a flat surface at a right angle to the screen. IN3924
must be at least 45” (1.0m) from the projection screen, and IN3926 must be at
least 51” (1.3m) from the projection screen.
• If you are installing the projector on the ceiling, we strongly r
ecommend using
InFocus approved ceiling mounts for proper fitting, ventilation and
installation. Refer to the installation guide that comes with the InFocus Ceiling
Mount Kit (p/n PRJ-MNT-UNIV) for more information. The warranty does
not cover any damage caused by use of non-approved ceiling mount kits or by
installing in an improper location. To turn the image upside down, see “Ceiling
mount” on page 28. We recommend using an InFocus authorized ceiling
mount.
• Position the projector the desired distance from the screen. The distance from
the lens of the projector to the screen and the video format determine the size
of the projected image.
• The image offset for IN3924 is 115% +/-
5%. This means that if you have an
image 60 inches (1.5 meters) tall from a table-mounted projector, the bottom of
the image will be 9 inches (22.9 cm) above the centerline of the lens. The
image offset for IN3926 is 113% +/-5%. This means that if you have an image
60 inches (1.5 meters) tall from a table-mounted projector, the bottom of the
image will be 7.8 inches (19.8 cm) above the centerline of the lens.
60” image
(height)
bottom of image 9”
above center of lens
Projection angle
lens center
Table 1: IN3924 (XGA) Screen size
Diagonal Screen Size
(inches/m)
Size of the Projected
Image W
idth
(inches/m)
Distance to screen
(i
nches/m)
50”/1.3m 40”/1.0m 19”/0.5m
60”/1.5m 48”/1.2m 23”/0.6m
70”/1.8m 56”/1.4m 27”/0.7m
80”/2.0m 64”/1.6m 31”/0.8m
100”/2.5m 80”/2.0m 38”/1.0m
Table 2: IN3926 (WXGA) Screen size
Diagonal Screen Size
(inches/m)
Size of the Projected
Image W
idth
(inches/m)
Distance to screen
(i
nches/m)
60”/1.5m 51”/1.3m 19”/0.5m
70”/1.8m 59”/1.5m 22”/0.6m
90”/2.3m 76”/1.9m 29”/0.7m
100”/2.5m 85”/2.2m 32”/0.8m
120”/3.1m 102”/2.6m 38”/1.0m
248
162
109
Ceiling mount screws:
M4x8 (Max. L= 8mm)
Unit: mm