What you do is go into the convergence setup (in service mode) switch to green for geometry, and set up the grid so its all nice a straight how you want it by using the following:
- Ensure only the GREEN Grid is displayed, by Toggling the BLUE/RED Grids off..
- Ensure the Cursor is GREEN, use '3' to cycle the colour of the cursor
- Now, you can use 2/4/6/8 to navigate the 'cursor' around, 5 to enter Adjust mode, then the 2/4/6/8 to move that point around, and 5 again to leave adjust mode, and then 2/4/6/8 to move the cursor to the next point of interest.
You want to adjust the GREEN Grid to remove any geometry errors... this is the 'reference' grid that we will use to converge the other colours to, so its important that this is straight and true..
this was taken from demons tips thread located here:
http://www.avforums.com/forums/showthread.php?s=&threadid=97056
once that is done go to the red and blue and do the same but matching it to the green so everything in converged (before you do that you may want to resize the image so it is the correct size as that will cause misconvergence).