[TinCanAlley]

Some success, and a setback.....

I tested all CRT voltages and they are pretty much what the SM has. I then ditched the pattern instructions for contrast and brightness and started with brightness til blacks started turning grey and back off til black again. Then adjusted contrast to bring up overall brightness and went back an forth between them to fine tune. From there I use a blue colored filter to do color and tint. Used another test pattern to adjust peak picture till all ringing was gone, but not over softened. From there I brought up the geometry patter and adjusted vertical linearity. After all was settled, see attached pic 1 and 2 for results.

Now look at pic 3. While viewing, I completely lost horizontal sync. No adjustment of the control would bring it back. I then removed the board and reseated which gave me back sync, but the image is still unstable as it is wavering every few seconds like it's about to lose sync again. The SM says it's either horizontal phase detect, oscillator or AFC. Each one of those is a socketed transistor and they were recently installed to put correct PNs on the board. Maybe one is failing? More likely they need to be tested and then soldered in place.

Pic 4 is a bonus.