Apple Macintosh Performa 577 - Manual (Page 150)

Adjustments Convergence - 29
3 Using a hex-head plastic
adjustment tool, adjust
the N/S amp control for
best convergence of
horizontal lines at the
top and bottom of the
screen.
4 Adjust the lower
correction control for
best convergence of
vertical lines at the
bottom of the screen.
5 Adjust the upper
correction control for
best convergence of
vertical lines at the top
of the screen.
N/S Amp
Upper
Lower
Crosshatch I
Correction
Correction