[TinCanAlley]

The service manual has it as video amp 4, but it's actually 3 and the set doesn't have a 4. Anyway, I replaced the 24V Zener and the .001 1KV decoupling cap on that's amp's transistor. While many said the ringing I see when I scope the ABL, and along that path, wasn't the source of the bars, it quite possibly was. I tried cleaning up the ringing from the source, but I didn't know enough to do that. The ABL's collector is sourced from the tripler. The 500ohm resistor goes to a 7.5V zener and spark gap. The Zener is on the wiper of the ABL pot which feeds the ABL transistor. I noticed that if I turned the pot, the bars changed intensity. Not much, but noticeable. I then set the ABL per SM and started tracing the circuit better. I found that the brightness, contrast, ABL, Blanker, etc. all came together and funneled into the video amp. Looking closer I noticed the zener on the transistor base and the decoupling capacitor. Didn't bother doing one than the other to see, just did both as I had them.

Anyway, while the bars are gone for standard viewing, I can still make them appear faintly if I crank the brighness and contrast beyond what is normal levels, but at the normal levels for viewing, even dark scenes, they're gone.