NEC WT615 User Manual page 45

NOTE:
• In terms of the optical characteristics of this projector, in addition to keystone distortion (page 102), there may be occurrences
of slight pincushion type or barrel type distortion.
To adjust the projected image with the screen, first perform Steps 9 to 11 on pages
distance → Height adjustment of the projected image → Focus adjustment), then align the 4 corners of the projected image
with the 4 corners of the screen. Following this, if the pincushion type or the barrel type distortion is conspicuous, please
perform " Adjusting Pincushion or Barrel Distortion (Pincushion)" after you select a source you want to project.
• If the keystone distortion is not improved after pressing the FOCUS +/– buttons and adjusting the focus, or the aspect ratio
does not agree, make sure the screen or projector are not tilted.
[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.
T
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3. Projecting an Image (Basic Operation)
35
38
to 36 (Adjustment of the projection
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