Acer AL2251W Podręcznik użytkownika - Strona 15

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Screen image is not centered or sized

properly.

Picture has color defects

(white does not look white)

Horizontal or vertical disturbances on

the screen

CLOCK (pixel frequency) controls the number of pixels scanned by one

horizontal sweep. If the frequency is not correct, the screen shows vertical

stripes and the picture has not correct width.

FOCUS adjusts the phase of the pixel clock signal. With a wrong phase

adjustment the picture has horizontal disturbances in light picture.

For FOCUS and CLOCK adjustment use "dot-pattern" or win 95/98 shut-down

mode pattern.

*Adjust pixel frequency (CLOCK) and

FOCUS or press hot-key (AUTO)

*Adjust RGB color or select color

temperature

*Use win 95/98 shut-down mode

Adjust CLOCK and FOCUS or

perform hot- key (AUTO-key).