Bad news is I dont have the Sams for it. Maybe someone else
has it.
While you have the boards out look over the electrolytic caps.
Look for swelling, discoloring & puss leaking out the top or bottom.
Cold joints & 'lytic caps probably account for 70% of failures on
sets from the late 70's on so keep that in mind. Funny thing is they
almost always are in the same places & across all brands. The engineers
could have easily & cheaply cured most of them. But I dont complain.
They paid for my house, kids collage & kept beer in the fridge !
Mostly T-bone steaks & not much pasta.......
73 Zeno
LFOD !