I recently got a used JP2C and have had it for a few days, so I'm not very familiar with it. I removed the chassis to swap the V1 tube and when I got it all back together (a bit of a pain), the reverb is behaving strangely. It was working before as expected, but now when I turn up the reverb it is behaving like a gain control. I'm not hearing any reverb, but the volume increases as I turn the reverb up. If I turn the channel gain completely off and the master at reasonable position, the reverb knob will kind of behave like a gain knob increasing the volume. Any ideas on what would cause this or how to fix it?