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Okay, well I replaced Q512 and it didn't help.
I realized my error here that the collector voltage on the schematic was actually an integrated AC waveform, and not a true DC voltage. At least that's what I believe is the case now.
It was confusing to me because sometimes my DMM told me it was 2VDC and sometimes it told me it was ~114VDC, even when in explicit DC mode.
Additionally, I assumed that it would match the RMS voltage calculated by my scope at about 265VRMS, so I guess the DMM is doing some kind of voltage averaging or something like that idk.
At this point, I am not sure what to try anymore.
The basic symptoms are still there
- Low horizontal and vertical size
-Horizontal center is shifted too far to the right, can barely compensate with horizontal centering control
-Hourglass distortion control is biased to pucker in on the sides. Adjusting it never evens out the side completely, but it does pull in the corners.
That's about it. Everything else seems pretty good about the set. The picture gets bright and has decent sharpness for a 1978 tube.
I have measured the B+, the yoke, flyback and HOT windings and they all seem to be good. I measured the size and geometry pots and checked voltages around the deflection area.
My last thought is that maybe the Damper Diode is weak? Not sure if that could cause all this, but maybe.
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