Yeah, I'm the guy in white.
Repair (had a busted cap that was shorting the +12V line): https://plus.google....297657130285409
So, looks like a fun machine, but finding information about it has been a PITA. I can't even find the cassette pinout. Is it that DIN-8 at the back?
I found a bunch of pages about it but only in Japanese. It'd be nice to find a mailing list or web forum, then even if it was in Japanese I could communicate via Google Translator.
Any pointers will be greatly appreciated.