Acoustic amp schmatis

[RobertR]

I am looking for a guitar amp schematic for a acoustic model MVA500. This is a solid state amp. I have a loss of volume after one minute. Can any one help me with finding the schematic.

[Enzo]

I have no schematic, but when it does this, if the amp has an FX return jack or a power amp in jack, try poking a plug in and out of them a time or two. ANy change?

Id Acoustic the brand? I find a Westfield MVA500, but not one from Acoustic.