when the reverb is switched on through the footswitch its totally max out like being set on 10 yet the reverb pot doesn't function if turned. I have attached a schematic for the v55 model minus the reverb circuit because its unavailable but added one for the v22 model which should be the same type digital reverb used in this model if anyone has any clue on fixing or troubleshooting this problem. I would imagine the reverb is supposed to work if the footswitch isn't plugged in but it doesn't. I just bought this amp used a week ago and everything worked fine till a couple days ago and i can't return it. THANKS