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On Monday, July 29, 2013 3:40:36 PM UTC-5, Bob Quintal wrote:
" wrote in

:







There is no separate FX circuit board inside. And no plug in chips

on the board. Everything is soldered on one single board. There is

nothing and bench technician can do to fix the problem





Baloney!



Competent bench technicians can repair solder joints, and replace bad

components soldered to printed circuit boards.



If the problem is diagnosed as a RoHS compliant (e.g. brittle) solder

joint, it may be easy for a competent technician to fix.



If the problem is diagnosed as a bad resistor, it may be easy for a

competent technician to fix.



Q



Dah..........
And how exactly bad solder joint can cause EXACTLY THE SAME PROBLEM in 4 different units?