Samsung 550DX Manuale Utente

You can change the 

Safety Screen Type.

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Use this function to set the execution period for each mode set in the timer.

Within the set period of time specify a time for execution.

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Mode - Bar, Eraser, Pixel : 10~50 sec

This function prevents after-images on the screen by moving long black and white vertical

lines.

Adjusting the LCD Display