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1. Select a 60 by 60 inch, smooth area on
one wall. Place a sturdy bench or test
stand about 8 feet from this wall area.
Position the Overhead Projector on the
test stand so that it points toward the
wall.
2. Measure the vertical distance from the
floor to the center of the front projection
lens. Following a floor or ceiling line from
the projector to the wall, make a mark on
the wall the same distance from the floor.
Locating Center of Projection Area
NOTE
If floor or ceiling lines are not
available, stretch a cord or string
from the projection lens to the wall,
and use a carpenter’s square or
other square object to find the point
at which the cord is perfectly
perpendicular to the wall.
3. Mark the position of the stand on the floor
and the projector on the stand so that the
perpendicular relationship of the line from
the projection lens to the wall is not lost
while making subsequent adjustments .
4. Using the mark on the wall as a base
point, measure 30 inches up, down, to
the left and to the right. Mark the edges
of the resultant 60-inch square, and paint
the enclosed area a flat white, or cover
the area with a window shade, wallboard
or other substitute viewing screen.
5. Turn the projector on and focus an image
on the screen. Move the projector
forward or backward, maintaining the
image in focus at all times, until the
projected light just fills the 60 by 60 inch
screen. Be sure the image is in focus.
MODEL 2100 OVERHEAD PROJECTOR
4-2
Correct Tilt of Projector