March Power Amplifier Repair

I am trying to repair a solid state Marsh power amplifier but the part numbers are not visible they are smeared.  Anyone know if there was a schematic available?

Check out hifiengine / try to find it online. If all else fails, contact the manufacturer and they may send it to you.

But they would assume that you take full responsibility for the repair. I used to fix amps too...
Marsh is out of business a while ago thanks posting