User`s guide

Troubleshooting Adjusting the Display after Replacing the Main Deflection Board/
5 If necessary, repeat step 4 for the best overall focus.
6 Check the screen to see if any minor geometry adjustments
are necessary. If so, shut down the monitor and unplug the
power cord. Install the jumper on the CRT/video board.
Reattach the power cord. Restart the computer. Open the
Display Service Utility and select AppleVision 1710/
1710AV pattern selections. Use the DSU geometry slider
controls to adjust the display. Turn off the monitor before
removing the jumper.
7 For the two remaining Macintosh modes, check the screen,
and if necessary, repeat this procedure but leave out steps 3,
4, and 5.