Acer AL2051 Owner's Manual

Also see for AL2051: Service guide

Contents

Acer AL2051 Owner's Manual Manual pdf 15 page image

14Screen image is not centered or sizedproperly.*Adjust pixel frequency (CLOCK) andFOCUS or press hot-key (AUTO)Picture has color defects(white does not look white)*Adjust RGB color or select colortemperatureHorizontal or vertical disturbances onthe screen*Use win 95/98 shut-down modeAdjust CLOCK and FOCUS orperform hot- key (AUTO-key).CLOCK (pixel frequency) controls the number of pixels scanned by onehorizontal sweep. If the frequency is not correct, the screen shows verticalstripes and the picture has not correct width.FOCUS adjusts the phase of the pixel clock signal. With a wrong phaseadjustment the picture has horizontal disturbances in light picture.For FOCUS and CLOCK adjustment use “dot-pattern” or win 95/98 shut-downmode pattern.