AC Adaptor for Keyboard

I've got an Amstrad CKX-100 music keyboard which I can't find a manual or any documentation for, and I'm trying to figure out what voltage/current it needs (it doesn't say anything on the power jack). It runs on 6 C batteries, so I'm guessing it's 9V DC. I tried 9V adaptors of 200 ma and 300 ma, figuring that low currents wouldn't hurt it (is this an ok assumption?), and the "on" light would flash on for a moment but nothing more. But then my next highest adaptor was 800 ma, which caused all the leds to light up, so I switched it off quickly, worried that it might hurt the keyboard. Anyway, any thoughts of what I should do? Is this 800 ma behavior a sign of too much current, or not enough?

Hello Seilee1, welcome to the forum. Since it will be guess-work as to the voltage I strongly advise you to ask the only ones who can know and those are Amstrad themselves. Since your profile doesn't state where you live I can only give you a link to the general customer services and contacts. I hope they can help you,

click here please


Let us know how it went

Thanks for the reply, Jeffie. I actually ended up emailing a guy who ran one of the few sites that talks about the keyboard, and he quickly got back to me with the info, so now I'm all set.

Your welcome. I'm happy you got to receive the information you needed. Did you try it out? Is your keyboard now working?