Sony KV 1212

[DaveWM]

Got it

it was a 4.7uf on the boost supply that powers the video output transistors.

I found it while scoping the CRT back, it was on the collector but not on the base (the decrease in signal on either side of the blanking pulse.

what was throwing me off was the sams did not have a boost supply HV, rather just the reg mains B+ which I had changed out. This set had a diode where a choke was supposed to be, the diode rectified pin 1 (again not on the sams) and the filter was across the boost voltage and the B+ (which seems odd since if the horz does not kick off the boost will be zero and the B+ mains will be 160, the cap is rated at 50v....hmmm maybe when that startup cap went out it took this one with it.