Quote:
Originally Posted by MadMan
If it's humming.... wouldn't it be filter capacitors?
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Possible. By the mid 80s most sets used 17KHz switch mode supplies for everything....granted if the big filter cap across the bridge Rectifier that rectifies the power cord input is bad it could be introducing enough hum to the 17KHz switching transistor it powers to swamp the switch mode B+ output regulation with hum.
Disclaimer: any set made after 1980 has zero value to me so I never fix them and always part them out to fix older stuff. My repair knowledge of these is theory and reading rather than first hand.