[sdiy] TR-909 service?

[nN AAt e e]

> I'm trying to fix my friend's TR-909. I can't find the digital
> schematics anywhere. Anyone got those?

individual voice schematics are available at:
http://hardware.freepage.de/raf909/ [under circuit analysis]
a few more from colin http://www.colinfraser.com/tr909/my909.htm

i haven't seen anything on the sequencer, but i noticed a site with a
service manual for ten dollars.

- nate