[YamahaFreak]

Perhaps this is what I'm looking for? Resistor and diode at edge of mainboard, near cable leading to CRT board, though the diode isn't a glass one. None of the other capacitors match the suggested values to look for.

I think I've found the vert IC - a seven-pin device resembling a large transistor, that's mounted to a heatsink near the tuner. (It's visible at lower right.)