The vertical size is too large, therefore the band showing info on football games can only be partially seen, and not read. how do I adjust vertical size

Instead of trying to make the TV display the picture the right size I suggest you adjust it at the source. If it is a cable box or sat box there should be a display adjust capability to size the display to the native resolution of your TV.

Find the Aspect ratio button on the TV remote. Press it a number of times to cycle through the options. Stop when the picture is the shape you want.

Have a read of your TV manual. Stuff like this is detailed in there.

If model indicated here is correct either a problem in the Vertical circuit of the set or an adjustment.

Almost any shop can take the set into the service menu and adjust vertical size a bit to correct if not circuit problem.

In aspect ratio be sure it is set to "Just Scan". That should do it.

Has the image been "zoomed" into?  This is usually the result of a image that has been adjusted to fill the screen.  This is not the same as adjusting the aspect ratio as that would still show the entire image even if distorted.  When the image is cropped or is missing information, a zoom feature is usually the culprit.
If this isn't the problem, you maybe able to adjust the TV's horizontal/vertical placement through the TV's onscreen menu but only if it provides that option.  Do you see other channels that appear to fit properly?  I have seen certain channels not fit correctly while others do and this is due to the signal, not your TV.

your problem is called blooming as you might be aware of very high voltage in tv. you can check 1 high output voltage fron power supply. 2 if it is ok then the problem is in horizontal section.you can check cap.in hor. section at last flyback transformer. hope this will help.