Lenovo D154W User Manual page 21

Lenovo flat panel monitor user's guide
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·
Clock (pixel frequency) adjusts the number of pixels scanned by one horizontal sweep.
If the frequency is not correct, the screen shows vertical stripes and the picture does not have
the correct width.
·
Phase adjusts the phase of the pixel clock signal. With a wrong phase adjustment, the
picture has horizontal disturbances in light picture.
4.
When the image no longer looks distorted, save the Clock and Phase adjustments.
5. Press Auto to leave the OSD menu.
3-4 Flat Panel Monitor User 's Guide

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