Re: Tandberg series 15 - hummin', bumpin' and thumpin'!
There's your problem. There should be very close to 40v there.
I would look at checking/replacing whatever is on the rectifier's secondary side, in place of the thermistor, looks like a pair of transistors and a zener. Then suspect the AD131, then the output transistors (in order of cheapness!)
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Regards,
Ben.
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