Apple Macintosh Performa 577 - Manual (Page 138)

Adjustments Video - 17
Note:
The darkest bar must
remain completely black
throughout the rest of the
procedure. If you notice a
predominant color in the
darkest bar, readjust the
appropriate background
control.
6 If necessary, adjust the
blue (BG) and green
(GG) drive controls
until there is no
predominant color in
the four brightest bars.
Gray Bars