NEC PA500U -  Correcting Keystone Distortion

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2. Projecting an Image (Basic Operation)
 Correcting Keystone Distortion
Whentheprojectorisnotexactlyperpendiculartothescreen,keystonedistortionoccurs.Toovercomeit,youcanuse
the“Keystone”function,adigitaltechnologythatcanadjustforkeystone-typedistortion,resultinginacrisp,square
image.
Thefollowingprocedureexplainshowtousethe[KEYSTONE]screenfromthemenutocorrecttrapezoidaldistor-
tions.
Whentheprojectorisplaceddiagonallytothescreen,
Whentheprojectorissetupatanangleinrelationtothescreen,adjusttheHorizontaloptionoftheKeystonemenu
sothatthetopandbottomofsidesoftheprojectedimageareparallel.
1. Pressthe3DREFORMbuttonontheremotecontrolortheprojec-
tor cabinet.
The Keystone screen will be displayed on the screen.
2. Press the

buttontoselect[VERTICAL]andthenusethe

or

so that the left and right sides of the projected image are parallel.
* Adjust the vertical keystone distortion.
3. Aligntheleft(orright)sideofthescreenwiththeleft(orright)side
of the projected image.
• Usetheshortersideoftheprojectedimageasthebase.
• Intherightexample,usetheleftsideasthebase.
4. Press the

buttontoselect[HORIZONTAL]andthenusethe

or

so that the top and bottom sides of the projected image are par-
allel.
• Adjustthehorizontalkeystonedistortion.
Screen frame
Projected area
Align left side