I did the bad thing and turned the set on without replacing the electrolytic caps.
I slowly brought up the mains voltage while monitoring both the AC input and the HOT cathode current. I also have a 3 amp fuse in my variac. All seemed well, and I had a raster, but I couldn't get any video through the tuner. The pictures below are with the B&K 1077B's signal being directly injected into the IF though that phono plug that normally goes into the tuner. And there's no audio either. At least I know the HV and sweep circuits are working pretty decent. And the big filter caps stayed cool after an hour or so of this goofing around.
So now I need to figure out how the HV wire comes off that 21CYP22A. You certainly don’t take the CRT out to disconnect it? The HV wire disappears behind the CRT front clamp/cover.
Kevin