Looking for someone to fix my amp.

[nsd]

Hey guys
I've got a crappy JVC RX-6042 5x100 amp that's malfunctioning, and I was wondering if there's someone skilled enough around here, that's willing to fix it. You will obviously be compensated for your work, just let me know what/how much you'd like.
So what's the problem you ask ? Well no matter what input I'm using, every few seconds (5-10) the sound gets completely cut off. No crackling, no nothing. Just like it's put on mute, then regains volume, and so on.
I doubt it's still covered by warranty, but even if it were I don't believe I have the receipt any more.
Thanks.

[nsd]

Pweez ?

[dastt]

i doubt anyone can fix this here for you, amps are really hard to fix yourself even if you know what the cause is. your best bet is to just by another becuase what it will cost to fix far outways most amps value. i had a rockford 350m and i got quoted at 150 to fix it and all it had was a unknown short somewhere that i couldnt track down myself

[Oversized Rooster]

It might be cheaper to fix the amp, but if you put a price on the hassle and/or shipping, you'll quickly realize that it would actually "cost" you less to buy a new amp.

[deejayspinz]

I have worked on amps before with this issue... More of an electronics hacker than a repair guy.. Instead of offering my services as its more work than worth the effort (sorry, but its the truth), I will offer some tips for you or someone else:

Some amps have build in cut off circutry to help them when they are overloaded. This sound to me like that component is worn out or not doing its job correctly by triggering too early. It could also be due to one of the MOSFET's being toasted which is causing a short in the system (which in turn is causing the overload protection to trigger). You can do a quick test by taking off the cover and running the amp under load and checking for areas that get hot quick (or hotter faster than other areas).

focus on the MOSFETS which are typically 3-legged black components that are screwed directly to the heatsink. These are where all the power is made. they take a low input signal and amplify it for each channel. One or more of these are likely done in (they may even show burn marks on them). If you find one is gone, you would have to get a replacement from your local car audio shop ($$$) or try ordering from Sayal and soldering it in yourself.

When you find what's wrong, its not hard to fix... Finding the problem is the challenge...

Dave

[nsd]

Hey. Thanks a bunch for the very detailed description. I'm next to the amp right now, with the case off and honestly ... I don't really see anything suspicious. Of course ... I'm very untrained :D.
So, if anybody is up for this, drop me a line please.