Vintage Synth Repair

Hi to all...

This is my first post on this forum.

My name is Sergio and I´m electronic
technician and composer of electronic
music (TD, Vangelis, Schulze, Hoenig...)

I have a Roland SH-2000 and I thinking
to make a few modifications on it, but
I don´t have its schems in my database.

If anyone of you can send to me, or to give
me any link or info about it on the web,
I will be very grateful.

I searched its schems on the web but I can´t
found it... but, the web is very big.

Thanks for all...

Regards

Sergio