Specifications

Troubleshooting Adjusting the Display after Replacing the Main Deflection Board
6 Using the DSU, click the H-Focus button to improve the
dynamic focus. Drag the H-Focus slider control until the
screen shows the best overall focus balance from center to
top, bottom, and sides of screen.
7 If necessary, repeat steps 5 and 6 for the best overall focus.
8 Check the screen to see if any minor geometry adjustments
are necessary. If so, use the DSU geometry slider controls.
(Refer to the linked document Monitors and Sound.pdf in the
Adjustments chapter.)
9 For the two remaining Macintosh modes, check the screen,
and if necessary, repeat this procedure but leave out steps 3,
4, and 5.