Acer 41L1500-786-1A, AL1521 installation instructions Screen image is not centered

Screen image is not centered	or	*Adjust pixel frequency (CLOCK) and
sized properly.		FOCUS or press hot-key (AUTO).
Picture has color defects		*Adjust RGB color or select color
(white does not look white)		temperature
Horizontal or vertical disturbances on		*Use win 95/98 shut-down mode Adjust
the screen		CLOCK and FOCUS or perform hot-
		key (AUTO-key).

CLOCK (pixel frequency) controls the number of pixels scanned by one horizontal sweep. If the frequency is not right, the screen will show vertical stripes and the picture will not have the right width.

FOCUS adjusts the phase of the pixel clock signal. With a wrong phase adjustment the picture has horizontal disturbances on light pictures.

For FOCUS and CLOCK adjustment use “dot-pattern” or win 95/98 shut-down mode pattern.

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