Apple Macintosh Performa 577 - Manual (Page 154)

Adjustments Geometric Distortion - 33
5 Using a hex-head plastic
adjustment tool, adjust
the control that is
appropriate for the
distortion.
6 If the display is so
distorted that you can’t
tell which adjustments
to make, perform the
adjustments in the
following sequence:
• Pin Phase (KS)
• Vertical Angle (PR)
• Horizontal Bow (PB)