Sunn 1220S Soundboard

[KDogg]

hope this posts....
I have a Sunn 1220S Soundboard with a loose connection, I can't seem to find any info on it anywhere, anyone know where I can get the schematics or anything?, or where I can get parts? ThanX!
K.Y. Renton, WA, actually across the street from Hendrix's resting place; Greenwood Memorial!!!

[Don T.]

Hello:
 1220 powered mixers use 20-0166 powerboards (2) so you can use the SA20-21 schematics for those with the exception of the resistors that supply the + - 15v regulators. That mixer uses flexible interconnects which can be problematic after a few years. You should be able to use basic troubleshooting techniques to locate loose connections & broken solder joints. I would check the switching jacks on the back panel first. those can cause lots-O-gremlins.