I live in Japan and bought of cause the japanease Version of the PRS-650 called "J-PRS-650" because no other version was available.
I tried to install the original europeaen firmware version and also the PRS+ version. But both failed.
The use of the japanease version is for me not convienent because also the PC frontend is only in japannease language. I live in japan at this moment but i didn`t understand the language very well.
The step from german over english to japanease language is in general for me very difficult.
So I need some help how to flash the european (german) firmware to the J-PRS-650. (japan version). And maybe update later to PRS+ version.