We recently moved to South Korea. I ordered a Roland FP E50 keyboard via an on-line shopping site. The instrument I'm receiving is being imported from Japan. I'm worried about the electrical power difference between Korea (220v) and Japan (110v). Will I need to get a step down transformer to avoid frying my new keyboard. I can find no information at all on the Roland site. All references say to make sure to use the AC adapter module supplied with the keyboard. It does not mention the source AC requirement or warn about any possible voltage mismatch. I know the actual keyboard like most electronic instruments basically runs on 5 volts. But most (like TVs) have no problem with either 220 or 110v source AC current. You usually only need a plug adapter to match the wall outlet.