Samsung UN46ES7500F E-Manual page 176

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This function removes after-images on the
screen by illuminating all the pixels on the
PDP according to a pattern. Use this function
when there are after images or symbols on
the screen, especially when you displayed a
still image on the screen for a long time.
The after-image removal function
N
has to be executed for a long time
(approximately 1 hour) to effectively
remove after-images on the screen. If
the after-image is not removed after you
apply the function, repeat the function
again.
Press any button to cancel this feature.
N