Guya-tone GA-830. Low output.

[ilyich100pesos]

I bought a GA-830 chassis a loooooooong time ago and just started working on it a few months ago. I fired it up today and I'm getting really low broken output. It can also be heard while on standby but even lower. Bad OT?

Schematic:

[ilyich100pesos]

A few voltages that might be helpful to diagnose?

357Vdc Plate
327Vdc Screen
-9Vdc(-7Vdc) Grid