Re: Sonos playbar power supply help

Just registered to say thanks for the info shared here.

I repaired my faulty Playbar. It had a shorted bridge rectifier and a leaky filter cap.
Then the awful pulse transformer whine...

Dipped it in some yacht varnish and the whine is almost gone, can't hear it when sealed in the case.
Something i tried before dipping which quietened it a bit was to wrap cable ties around it, damped the ringing some.
thanks