Paul Marossy Posted August 20, 2005 Report Share Posted August 20, 2005 (edited) This has got to be the world's easiest tube amp repair ever! A friend of mine has a Mesa Boogie Nomad 45. It is a three channel amp and it was having trouble switching ever since he had it. It couldn't make up it's mind when you wanted to switch between channels 1 & 2 - the relay would just flip back and forth and try to switch between one channel or the other, never really switching as intended. My intuition told me to start with the footswitch itself. I took it apart and took a look at the PCB. The first thing that I noticed is that there was a large amount of flux around all five of the connections at the LEDs. I got some alcohol and cleaned off the excess flux from the entire board. Then I turned the amp on and gave it a try, and now it switches perfectly! It seems really weird that this could cause a problem like that, but this isn't the first time I have encountered this phenomonon where excess flux has caused a problem like this. Go figure. Edited August 20, 2005 by Paul Marossy Quote Link to comment Share on other sites More sharing options...
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