It's now a usable set again!
Last night I got the color osc. to properly synch fixing the last major lingering issue.
I still need to preform some gray-scale adjustments and other control tweaks but it is now producing a watchable color picture.
Repairs since last time consisted of replacing a single transistor in the color circuit to restore color video, tweaking the color osc. improperly thus making the feeble color synch and off color worse, replacing several parts in the vertical circuit to allow it to synch in the range of the hold control, and finally through dumb luck finding positions of the color osc. adjustments that allow solid color synch and proper tint range. I say dumb luck because the sam's adjustments I tried were not seeming to have the affect that they suggested, and I ended up just twiddling the two controls they had me adjust until it just popped back in to the proper setting...Perhaps my least favorite part of that procedure was that the osc. coil is located RIGHT next to the HV lead and the open terminals of the flyback and tripler thus leading to several unpleasant static(arc?) zaps before the idea of obtaining a rubber glove came to mind.
Here is a picture of what all was replaced.
The parts to the far right as well as the tube were replaced to restore the raster, the transistors and resistors on the square were needed to restore video, the parts by the tube were replaced to fix the vertical synch, and the lone transistor on the rubber grommet was replaced to regain color.
This was a pretty cheap restoration. All the resistors and some of the caps came from my NOS/used parts bins and the transistors were equivalent to 2N2222's which da shack sells a large assortment of for around 3$.
A good portion of the resistors in problematic circuits were off or near tolerance, and I suspect more of them remain, however unless performance issues necessitate further work I think I should leave well enough alone...I've damaged enough PCB traces already.
Now that I've proved to myself that I can fix virtually anything I think I'll go and revisit some old dog project sets I shelved years back.
Once it is all back together I think I might drag the Sylvania in it's as found cosmetic state as well as a power and a signal source out to the spot where I found it. Then take some pictures of it working in the place it was found....Maybe I should take it to a flat panel dump and take some pictures of it working surrounded by trashed flat panels as a statement about our throwaway society and the comparative quality of vintage American products to the imports of today.