Thanks for the advice. I see what you mean about that ground strap. It's actually easy to get the sweep chassis out.
Undo the ground strap, disconnect CRT and yoke plugs and remove one screw.
What I really find curious is the tube lineup. The Sams service info shows a 6CG7 horizontal oscillator tube down there which makes sense
However, this version has a 10DE7 vertical tube down there while the 6CG7 is up top with the sync and video out tubes.
I had been wondering where the electrolytics caps were hiding. Found them! That's one big ass cap.
Loads of gooey wax caps to replace.
Clearly some work had been done. Seleniums have been replaced with solid state diodes and there are a couple Sprague Atoms.
I'm thinking early 80s?
Finally, here's the tiny flyback.
