Sequential circuits samplers

Hi Prophet group

This is my first post to the group. 

I'm about to receive a Prophet 2000 from the states to me in europe 
and I'm wondering if there's a manual switch on the PSU between 110V 
and 220V or if the PSU detect this automatically.

If it's a manual switch I'll have to remember to switch it before I 
plug the powercord in.

Do you know how it's designed?

Best regards

Brian