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I assume you meant to say to adjust the vertical size control, not vertical lin? Do those sets even have a vertical ine control? Assuming is vertical overscan and the linearity is good, that may be all that is needed. There should also be a width coil near the flyback that will take care of any horizontal overscanning. It will be the only large adjustable coil in the set.
I have seen some other bad caps in those sets that caused excessive overscanning with poor vertical linearity. It's been a long time, but I think they were at the edge of the board near the vertical IC.
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