I recomend you to buy a PA 300,(sold only throught music dealers), that is the name of the PSR 3000/and compatibles Power supply since the PSR 1000,1100,2000,2100, etc.....
I believe is a 16 volts and most power adaptor, most universal power adaptors, besides not having the proper plug, polarity, etc.... are between 6 to 12 volts.....I would NOT expose my PSR to other but the original power supply, I purchased one extra just in case.
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mdorantes
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mdorantes