Specifications

Troubleshooting Adjusting Screen Convergence - 10
Adjusting Screen Convergence
Important: Screen convergence is never perfect. CRT tolerances
allow for some distortion and variances. Slight misconvergence in
areas of the display is normal.
Before you begin this procedure, adjust focus as described in the
“Focus” symptom. Evaluate the convergence for acceptability
(understanding that screen convergence is never perfect).
If the screen convergence is poor,
1 To improve the horizontal and vertical static convergence
and the vertical dynamic convergence, use the Monitors &
Sound control panel. Click Convergence, and adjust
convergence (horizontal and vertical) for best center-of-
screen performance. Then, from the convergence screen,
adjust the vertical dynamic convergence (controls on the top
and bottom of the screen).
2 To improve horizontal static convergence in the center of the
screen, use a standard plastic hex tool to manually adjust the
horizontal static convergence potentiometer (lower left side
of the CRT/video board) for best center-of-screen
performance. This adjustment should improve convergence
on vertical lines in the center and over most of the screen.
3 To further improve the left and right sides of the raster
convergence, you can adjust a control on top of the deflection
yoke. This adjustment will improve convergence on vertical
lines only. Locate the horizontal dynamic convergence
controls on top of the deflection yoke. They are marked TLH
and APH.
Caution: To avoid irreversible convergence problems, do not
touch any of the other deflection yoke controls.