That chassis looks really familiar, back in my TV servicing days, we had a line of sets branded AWA/NEC and Samsung with pretty much the same bottom PCB as in this one. They were actually pretty reliable and did give a good picture so no surprises with this one giving a nice result.
One problem though with these and it looks like your set has then as well, is the rubber wedges that sit in between the tube and the yoke go bad. The rubber goes hard and takes on moisture which then corrodes the copper windings and causes the yoke to short out. I'd pull them out and check to see what its like underneath, you may be lucky with yours as the set is still going. If they are going hard or look crusty don't put them back.
I think the other issue was a high voltage electrolytic cap in beam limiting circuit from memory it was a 4.7uf or a 10uf at 350V - this would leak and you'd get a bright white out raster with fly back lines.
Nice find, the set looks as though its got some life left in it
Cheers Glen