hi,you can access convergence from the sub menu,select manual and adjust,the voltage adjustment ports on the board are only for picture hue and screen size.over adjustment of the blue port will give you a blue hue to the screen.red a red screen and so on.these initial adjustments are made by eye,until you get the right balance.if you are having trouble with the alignment of the colours,and cannot get a correct picture then the two large ics attached to the heatsinks on the R board need replacing.you could try to locate and download a service manual .same boards used in most rpj screens.magnavox/phillips.hope this info helps.
ozone
December 2011