well i just found out it IS the analog board.
i have an LC/performa 550 model with the SAME board in it, but its wider.

there is a pot on the back of the video board if i adjust it, it causes the horizontal convergence to adjust left to right ;-)

but on the classic analog board, that pot does NOTHING. the only thign i can figure, is because im missing a grid voltage somewhere..

but anyway, i took the 13" 550 CRT out, and stuck my 9" CC CRT in place of it, and boom, perfect convergence after adjusting the pot.

i put the 13" CRT back in, and stuck my color classic analog board in and bam my 13" cRT is out of convergence and pot does nothing.

so something is wrong right there... either im missing an anode voltage, or something.

Click to expand...

Well, yes, of course it's the analog board.

It sounds as if you did not actually look at the manual. The manual clearly shows all of the relevant controls, along with a description of what they do.

You are not missing "an anode voltage." There is no anode voltage that affects convergence of only one region of the display.

Please carefully reread what I have written. It'll save both of us time. The relevant advice: Now that you have identified a non-functioning control, you have a starting point for further troubleshooting. Test the control itself. Look at the associated connections. DO A VISUAL INSPECTION of the circuits connected to the control. Then follow up with as many electrical tests on those same components as you can. The most common faults are single-point/component failures, so your chances of finding the problem are pretty good, even without a schematic. Convergence circuits, particularly for Trinitrons, are actually not all that complex. There aren't zillions of transistors along the way, for example, so it is a well-bounded problem.