Mesa Express 5:50+

[dmeek]

Does anyone have the schematic for the plus version? I have a problem with the muting circuit between the master volumes and graphic EQ. There seem to be significant changes from the non-plus version. There are 3 FETs instead of one.
Seems to be a problem in the switching circuit, not shorted FETs.

[dmeek]

It was a FET after all. I went ahead and replaced the 3 J174s. Problem solved.