NEC WT615 Guia De Instalacion página 16

[Symptom1]
In the case of keystone distortion (as illustrated), either the screen is directed
slightly upward or the projector is directed slightly upward.
[Action]
Tilt the top end of the screen to the front or rotate the front feet of the projector
to correct keystone distortion.
[Symptom2]
In the case of keystone distortion (as illustrated), either the screen is directed
slightly downward or the projector is directed slightly downward.
[Action]
Tilt the bottom end of the screen to the front or rotate the rear feet (screen side) of
the projector to correct keystone distortion.
As illustrated in the diagram to the right below, when the top and bottom edges of
the image are not parallel to each other, it can be suspected that the screen and
the projector are not parallel to each other.
[Symptom 3]
As illustrated in the diagram to the right, when the left edge of the image is wid-
ened vertically, either the projector is not placed straight in front of the screen or
the projector is directed slightly to the left.
Conversely, when the right edge of the image is widened vertically, either the
projector is not placed straight in front of the screen or the projector is directed
slightly to the right.
[Action]
Place the projector straight in front of the screen.
Make sure that the screen and the projector are parallel to each other.
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