| Electronics > Beginners |
| Replace Ceramic disc capac |
| << < (3/6) > >> |
| james_s:
Resettable fuses reset themselves, if it is not resetting then either the fault condition remains or the fuse has failed. |
| onedumbquestion:
I got info that it's a resettable fuse https://www.mouser.com/Circuit-Protection/Resettable-Fuses-PPTC/_/N-bm931?P=1z0z7l5Z1z0z63x I don't know I can't find it by looking at that data sheet Can C156 be a resettable fuse in the power protection circuit |
| Ian.M:
Nope. See https://www.manualslib.com/manual/1002353/Yamaha-Rx-460.html?page=34#manual where its quite clearly listed as a ceramic cap. Also if it *was* a fuse googling the code on it "103H35" fuse could be expected to find a reference to a datasheet or a seller, but it only finds this thread + a lot of irrelevant garbage. |
| onedumbquestion:
So I'm assuming I removed the wrong component and I'll put it back in I may as well test it first How do I discharge it? |
| Ian.M:
:-DD Why don't *YOU* work out the max. possible stored energy in that cap if charged to its full rated working voltage, assess the likelihood of that ever happening in the circuit it was in, then decide on a safe discharge procedure for yourself? Anecdotally: after the third time I had to repair the workshop ESR meter after some dammed fool connected it to a large HV electrolytic without discharging it first, I added a rectangle of heavy copper sheet, stuck on with foam tape right next to the test terminals and instituted the procedure that the cap leads must be tapped on the copper to short it before testing. If they'd forgotten to discharge the cap properly, the large bang when they tapped it scared them into remembering to follow procedure in future quite effectively, and I no longer had to repeatedly repair the ESR meter. When we got a digital capmeter, it got a similar copper rectangle before release into the wilds of the workshop. N.B. Shorting is *NOT* a recommended discharge procedure for high energy caps, but up to a few hundred joules, is reasonably acceptable as final confirmation the cap has been discharged. P.S. you've just used up your entire dumb question quota for the month! |
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