[freakaftr8]

Ok so it looks like the voltages that drive the filaments are derived from the flyback. This would require me to put my Simpson to the task, if I can find it.

Here are the pics of the pinouts. I see the resistor on H1 tied to G2. It's a 220kohm. What's that about? Going to H2 looks like a sony proprietary inductor of some type. Dont see that changing voltage.