Issue with s/h Mark IV (A)

[gfitzp]

Hey guys, first post on here. Great to find this place. Ive owned my mark iv now for over a year (A type i think) and it has gave me nothing but sonic pleasure. Recently my FU-3 footswitch will not change between Rhythm 1 and 2 even though the led says it has. The amp remains on R2. This problem is solved by changing channels manually at the back and it sounds fine. Does anyone have any idea what might cause this problem? Really hope its not major. Thanks for your help

 

[JohnDNJ]

Maybe a loose pin in the foot switch jack? See if anything feels wiggly.

Otherwise you might have just messed up the switch which is easy to replace. Open up the
foot switch case and see if the switch wiring solder broke and such..Probably the case.