Power requirements conversion of a Japan-sourced Yamaha SY77
by Richard H
(Berthoud, Colorado, USA)
I have purchased a Yamaha SY77 from a source in Japan. Power requirements for the Japanese keyboard are 100W 20V 50/60Hz~. I currently own a USA SY77, its power requirements are 120W 28V 60Hz~. How would I go about operating the Japanese keyboard here in the USA without damaging its electronics because of the difference in power requirements? Are the voltage requirements within the 2 boards the same, after passing through the internal transformer, so that the Japanese board would only need an internal transformer change? Or is there an external transformer option? Please advise.
I tried contacting Yamaha support directly, but they replied that they don't support the SY77 anymore. Sure am hoping someone here can help me. Perhaps a tech, or someone who has dealt with this very issue... or someone who can direct me to someone or a website, who can help.....
Thank you for your assistance!