Vintage Synth Repair

Hi all,

It's my second post, ( got lucky on my first) so, does anyone know where I
can get a shematics for
the ROLAND sequencer CSQ-600 ??, or some help ??

A bit of explaning; got it as a gift attached from a SH-2. Don't know if it
works cos it as a huge blue battery,
that I know it's not from the machine, and it's lowering the main PCB and
all the bottons above. Strange I think ?!?!
So, I'm affraid to swith it on.

Thanks in advanced

Keyman
Palmela, Portugal