amp fing up

[Hydrastas 10+ year member]

i was driving and turned, the amp slid and the power wire grounded with the frame of the car. The whole electrical system stalled for a good second or two before coming back on, luckily the amp slid back after the corner so nothin blew up( no fuse near the battery). None of the fuses in the amp blew and everything else seems to work just fine. The amps power light comes on but the only noise that comes out of the subs is what sounds like a ground loop problem. It's not in the rcas cause i unplugged them and it still makes the noise, so should i start checking all the wires in the system? What could of fed up in the 1-2 seconds the power n ground were sparkin together?

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[blackbonnie 5,000+ posts]

could have melted wire somewhere, maybe something internally on the amp. do you get sound through your speakers or no?

 

[SplChoice- 10+ year member]

sounds like ur internals check em out

 

[RobertFielding 10+ year member]

yea bro i sounds like some of the interal output transisters could have been fried... hopefully not....

 

[Hydrastas 10+ year member]

When i first turn on the radio the subs do what seems like a 40 hz note that lasts around 3 secs and then it starts a heartbeat like repetition. I'll get some pics of the internals up, im not too familiar with them.

 

[Hydrastas 10+ year member]

ok i've got a few pics here

this first one is what seems to be the problem with the amp...

alright now the other side of the board...

Any suggestions for how to get that off? im thinkin either a sauderin gun to melt it loose, or maybe a drill bit with a tiny bit.

Finally heres a pic of my old amp and the plan for the surgery.

alright thats all i got, what tools would be suggested for this? And if i end up doing it successfully would it even fix the problem lol?

 

[Hydrastas 10+ year member]

I've got a soldering gun and some normal solder. Will i need anything else and is there a special type of solder i should use? Oh and anyone know a price check on about how much it would cost a pro to do this instead?

 

[luvinthebass 5,000+ posts]

**** that sucks man, i remember havin rear speakers onetime and i had the speaker wires hangin from the speakers and the amp right below, hit a bump and blew my speedometer fuse, lights, and radio fuse, learned my lesson quick,never have hangin speaker wires above a metal amp so that's when i basically was like **** it, i dont need rear fill

 

[Hydrastas 10+ year member]

how do you tell when a capacitor has blown? Are there any visible changes or do gotta use somethin like a dmm? I replaced the round crispy thing with another good one from the other fed up amp and nothing comes out of the speakers at all now. Does anyone know any other issues that normally happens when one of those round things gets fried... should i just switch out all the components on the entire blackish part of the circuit board to be safe? Oh yeah after the failed trial of the amp after the replacement took place i got a little bass withdraw and decided to hook up the subs to the rear speaker channels. The subs get moving pretty good with just 20-25w rms to em, not enough to knock the rear view mirror off or anything but it tops my 2 10"s i had at 200wrms. Only drawback is i don't have any crossover filters and the subs are gettin all the frequencies, can this possibly "overwork" the subs by them getting the high freqs or should it be fine?

 

[helotaxi 5,000+ posts]

The caps should ALL be replaced. The torroid is toast. The caps will cost a couple of bucks each, the torroid might not be sourcable.

Learn anything from this? Like bolt your shit down?

 

[Hydrastas 10+ year member]

by all do you mean all 30+ caps or just the 4 big ones next to the fed up spot?

 

[lanzardriver 10+ year member]

**** bro looks like we need to buy you a drill and some screws to bolt your shit down, ya that sux but the internals dont look too bad

 

[helotaxi 5,000+ posts]

All the big ones in the power supply are likely shot.

 

[Hydrastas 10+ year member]

alright i switched out the 4 caps near the power supply and nothin, then the other 2 big ones and nothing, then i examined the board closer and noticed that 2 of the white squares that say 1 ohm on them had black spots around the base, so i replaced them and nothing. Then i moved on over another hour period of switching out anything that looked burnt and nothing. So after about 3 hours of huffing solder fumes i'm left with a headache and 2 fed up amps that got the shit stomped out of them. I sent them to pioneer's hq to see what they have to suggest, hopefully they'll have some info. Looks like im stuck using 6x9s again, sigh.

 

[helotaxi 5,000+ posts]

Have you replaced the big round thing wrapped with wire called a torroid? It's toast. The amp will NOT work without it.