Mark V channel switching chattering

verticalhorizontal said:

I had this problem with my Mark V. In addition to the factory tutorial on adjusting the tab in the footswitch cable jack on the amp, I slid the amp out of the cabinet slightly and sprayed some contact cleaner in the channel switching switch. Problem solved. I had never used the footswitch (changed channels via midi externally) nor the rotary switch on the back of the amp. Hope this helps someone.

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