MESA LONESTAR SPECIAL REPAIR 5W-15W-30W NOT WORKING
I got in an amp that had been worked on by another tech and it was
stuck in 5w mode only
What I had found was the previous tech had unsoldered the gray wire (I
changed it to black because I wanted it a little longer)
when he lifted the main PCB.
Dont do this. it should just unscrew from
the chassis at the other end.
The gray wire pad and the RY-30 pad are so close together I had to use
a microscope to make sure the were seperate.
solder bridged them ont the underside of the PCB and that killed the
Replaced the relay and wattage switching is back in action