So I got impatient and switched to plan B...A few years ago someone here parted out another DA-4 chassis set and I had a spare sweep board I bought off of them. It was supposed to be a good board and it turned out to be. I had to figure out how to swap some stablock connected wires that go from the flyback to the neck board and I had to steal the 2 large 1200uF 250V rectified line capacitors (I stole them off the spare board for a project years ago) off the riginal board for the replacement board.
The new rev D board is a year newer than the rev B original but the set now works. Horizontal is about 2-3" small on both sides and vertical is down an inch top and bottom. There's minor focus and issues and 1/4" of horizontal fold over on the right, but I'm confident I can at least fix the underscan (I've been in the service menus to minimize overscan before). With luck I'll have completely bailed my self out of this mess in a little bit....Sucks I now don't have a good spare board but at least I didn't have to kill my spare set to get the main one going.
IMG_20240921_221555566 by
Tom Carlson, on Flickr