Assistance needed in identifying cap.

[Duttch]

These cap's come from a Russound multi room amp. One has gone to its maker. Unfortunately I can't identify the type and value of the cap.

Any assistance would be greatly appreciated.


Thanks

[stj]

Re: Assistance needed in identifying cap.

those arent caps, they are polyfuses - self resetting fuses.
if one failed you probably have a more serious problem.

it's more likely they are both fine - why do you think one failed?
http://www.rapidonline.com/Electrica...settable-Fuses

[Duttch]

Re: Assistance needed in identifying cap.

There are a total of 4 of them, One has burnt out / exploded. Could have been a power surge or heat build up over time. So want to try and replace the one that exploded.

[stj]

Re: Assistance needed in identifying cap.

dont, not till you check if the circuit it feeds is shorted.

[Duttch]

Re: Assistance needed in identifying cap.

Thanks for putting me on the right track. The polyfuses are connected / part of the interface for external keypads. It could have easily been a keypad that short circuited it (faulty wiring).

I just read up on them and the value would be:

Max V: 30 V
Hold current 1.35 A

Do you concur?

Thanks

[Duttch]

Re: Assistance needed in identifying cap.

Just an update,

I replaced the polyfuse, and still have an issue with the appliance. After replacing I still get the same error message (no controller, its a Russound CAV6.6). Apparently more damage was done than just blowing the polyfuse with the short or power-surge on a aux port.

Thanks again for you assistance.

[stj]

Re: Assistance needed in identifying cap.

watch your fingers, polyfuses work by heating up - you can burn your fingers on them.

[ben7]

Re: Assistance needed in identifying cap.

watch your fingers, polyfuses work by heating up - you can burn your fingers on them.

Indeed.

I've heard of polyfuses burning out before (they aren't supposed to do that, and I'm not sure why they do that sometimes).

Check to make sure that the new fuse is still OK (You didn't say if you checked it after getting the same error message issue)

Start by checking some power supply voltages, check regulator voltages, etc...
Do you now have voltage at the polyfuse that you replaced?

-Ben