I posted a ton of links for figuring out the repairs:
http://www.quiltingboard.com/vintage...n-t203810.html
Is it a zig zag or one that does fancy stitches?
We have a couple threads here about the Japanese machines:
http://www.quiltingboard.com/vintage...s-t207877.html
and the ones that do fancy stitches:
http://www.quiltingboard.com/vintage...s-t207880.html
I'm thinking I posted a generic manual for zz machines somewhere on one of those links, too.