Has anyone here ever tried cleaning hashcards or so with Supersonic cleaning unit? I've just recently stumbled upon this and would really like to try, but if anyone has some experience or pictures from before that would be nice.
Back in the 1980's we used to ultra-sound completed pcb's in TCE, but I think its been banned, got to find something equivalent; We also made thick-film pcb on ceramic's, before dipped we would ultra-sound, problem now is the solvents that worked back in the day, now what?
Another thing to remember is the ultra-sound was one time solvent, basically to clean the weld-joints, and get ready for final encapsulation, I don't think it would be wise to repeat a n solvent ultra-sound over&over on a pcb, you would cause lots of problems with the components over time
Some people just use water, u could always just use dish-soap warm water , then its not likely to kill the components, just make sure you dry well
IMHO most of the problem is just dust-bunny's forming on the volt-reg chips, which get super hot, static electricity, build giant dust bunny's, which just need to be blown away, if u don't clean say every 3 months, then cards get hot and magic smoke; That's how I know its cleaning time when I see a 2-3C rise in temp on the boards, so I know its cleaning time.
normal pcb cleaning is mostly just removing the flux, which can be conductive, but your card is/was clean when you bought it, not sure why your cards are getting 'soiled' as usualy its just dust that needs to blown away, an air-filtration system in the mining-rooms help catch the airborne dust
I personally don't solvent-clean my pcb's unless I have done work to them, e.g. remove flux
I have a large ultra-sound tank, mostly just gets used to clean my wifes jewelry; when I solvent clean my boards, I only clean the area that got covered in flux, if they needed repair