substitute caps

theMot · Apr 24, 2015

picked up a Chopper I board, no sound

. I noticed it was missing a cap around the sound circuit. It required 16v / 1000uf but I only had 16v 10uf spare. I put that on and the sound now works (happy days) but is the lower value going to cause a problem later? It is physically smaller than the other 16v 1000uf caps around it.

TeamShake · Apr 24, 2015

probably not a good idea to replace it with a lower capacitance. If it was a higher capacitance, it might be ok. Here is a substitution guide:
http://www.niccomp.com/help/capsubguide.asp

skate323k137 · Apr 24, 2015

You want to match the capacitance (uf). Voltage doesn't matter as long as it's the same or higher. I.e. a 25v 1000uf would work.

theMot · Apr 24, 2015

Thanks for the tips. So worst case at this stage, the cap won't last long?

skate323k137 · Apr 24, 2015

I probably wouldn't run the board any more until I had a proper cap in there. I'm just speculating but you could probably blow that cap at best, or damage the board at worst. If it was +/- 20% (which is tolerance on a lot of caps) then I wouldn't sweat it, but that much smaller is probably going to be an issue sooner than later.

theMot · Apr 24, 2015

Ok, i will get the right caps next week and then get stuck into it!

Thanks once again for your help.

mainman · Apr 28, 2015

Oh boy usually those big 1000 range caps are always used for decoupling. If the audio section is functioning it must be on the edge. I really can't comment on how it can be functioning with your 10 microfarad replacement without seeing the circuit.

The cap will not blow up seeing as how you at least used the right voltage rating but your fix is not reliable.

substitute caps

theMot

Reformed collector of junk

TeamShake

Kuroko's Training Dummy

skate323k137

Professional College Dropout

theMot

Reformed collector of junk

skate323k137

Professional College Dropout

theMot

Reformed collector of junk

mainman

CPS2 Person.,