Kurzweil SP2X 20Khz sine output, Shutting down

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argonrepublic

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Joined 2005
I was asked to take a look at this synth. Apparently it is shutting down when hot. I have not experience it so far. While plugged in and idle, I noticed a high pitch whine and occasional crackle. My RTA is showing the whine at 10-20k.
I am guessing that the whine is power supply related.
It used a 9VAC 2.0 amp wall adaptor.
Thanks
 
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