SR 6100

[Jim in Cleveland]

I am the owner of a Sunn SR 6100 and am looking for schematic diagram.  The sound occasionally cuts out as if there was a short or bad connection although power remains on.  When I open the cabinet, it works fine.  When I close it up again, I have the same problem.  Any ideas about diagram or what may be wrong?

[Don T.]

Hello:
 Most common failures:
1. Normally closed switching jacks on the back panel (any that say "in").
2. Inter-connect cables between circuit boards.
3. Broken solder joints.
4. Bad potentiometers.

Intermitant problems are rarely caused by component failure. A good cleaning / service, inspection for bad connections and broken solder joints fix 99% of bad units.
 The power board is either a 20-0135 or 20-0166. You will find schematics for these in the manuals for other products (20-0135 = BETA & 20-0166 = SA20-21). I do not have a schematic for the mix board.