Did your world plug adaptor include a step down transformer? if so then it will probably work fine - but be warned that a number of north americans clamshell owners have reportedly blown the charging circuits on the Cxx0 models using the wrong adapters!
Stu
Well, back in Austria I have been told that a "real" transformator is a huge device with lot's of copper and is quite expensive. Usually you wouldn't want to buy such a monster.
My plug adaptor is really small, looking just like a typical socket in Europe but with 5 connectors for other country's sockets (so it is just made for European male plugs). I just need to turn a wheel on top of it to the right position. Hence, I think that it doesn't do any transformation. I think that task is left to the electrical device, and as I said earlier, some do just that.
The Z is shipped with the EA-72 with only does 110 V (Japanese standard). With a simple adaptor I would grill it with 230 V at home. So I guess my best bet is to buy the original Sharp model to ensure that I won't damage the circuitry.
Thanks to everyone for the really usefull hints,
Hannes.