Thanks for posting, I was hoping you'd see this since I know you're the early CCII man.
1) there was never a recall on the 22-5001.Recall was on the next
chassis style with the 4 lead cap instead of 22-5001's
2) Orange Sprague caps are good. Never seen one open but a few shorted.
White American Radionic brand ones are garbage & usually open.
These are the three white caps found in my set:
In the video I posted, you can see orange caps on the HV board. This is a "D" series set, presumably a year before mine. At the 20:20 mark in the video he actually talks about the Zenith recall.
So there is a lot of confusing info out there. If one of mine failed open, would I see an affect on focus? Remeber I CAN get it to focus decently, at the center of travel... just not at normal brightness.
Per the handwritten SAMS spec, focus voltage is 1-1.5 KV too high now.
3) 3.5 KV not enough focus. Should be 4-5 ish KV The 130 V must be stable
or the pix will pulsate.
Naturally the part of the schematic which I need (and paid to download) is in error. Although the crossed-out part says "5100 ohms" so hopefully no one took that seriously. Should it have said 5100 v? The good news is that if you say I need between 4 & 5 KV, that's exactly where I'm at... Except with acceptable brightness and good focus in different places on the brightness control. No pulse/hum issues. Stable in that respect.
5) early problem usually a cap opens causing too high focus voltage.
Then over time the focus spark gap in the CRT socket gets toasted .
If left alone it will damage other HV parts.
BTW if you like lightning remove the caps & run the set. You get huge arcs,
you wont even get near it 
My CRT socket is starting to crumble NEAR the focus pin, but not the focus pin itself. So I'm wondering it that isn't from the instant-on feature? There doesn't seem to be any corrosion on the focus pin. I'm wondering if I should use a non-conductive epoxy or perhaps some dielectric grease to re-insulate the socket.
