C.E.C AMP3800 2x64W amplifier schematic

[xavlaur]

Hello !
Maybe somebody has a schematic for CEC AMP3800 ?
Initially had a humming noise on right channel, discovered floating ground on RCA input, rectified but after several hours come into protection mode, display: "ERROR".
Somebody, few years before, repaired one of driver cards (the left one).
I have no diagram and I need one.
Thanks