Need Psr31 schematic

1

I am looking for a Yamaha PSR-31 schematic. I cannot find any on the web.

Also, what is the alternative main board for that model if any exist.

Thanks

2

The main board is long unavailable, and there is no substitute part for it.

We have an overall circuit diagram for it, but not a detailed schematic of the main board. Contact me directly If you’d like me to send that.

3

I take whatever you give me. I am having hard time figuring out how to send you a private message.

4

Email me at sam@syntaur.com, and I’ll get it to you that way. Thanks!