How is it possible to blow a set of RCAs on a hu?

[TurdFergueson2 5,000+ posts]

I have a Premier 690UB that from testing it seems that 2 of my RCA outs are not working. Is this something that can be fixed or do I need to get a new HU? And if that happened to anyone, how was it that you did it?

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[CRXBMPN 5,000+ posts]

do they not work at all or do they just sound like anus?

 

[EGGmane 10+ year member]

It happened to a pioneer i used to own. I don't really know why it happened, i just know it caused a lot of interference in my subs.

 

[brtnboarder3241 5,000+ posts]

happened to me, my guess is since my amp ground is shitty the amp and i knew it was and was a dumbass and never bothered to fix it it lost connection at times and one of those times i imagined it tried to draw the ground from the rca's thus blowing them.

it was a pioneer and at least 2-3 people have told me this was also the same problem with theirs

 

[TurdFergueson2 5,000+ posts]

I get nothing from the rear. the front sound ok. I started throwing money at the problem. i thought it was the amp, but it wasn't. I know for sure it is the rcas, but i have no idea how i blew them.

 

[TurdFergueson2 5,000+ posts]

happened to me, my guess is since my amp ground is shitty the amp and i knew it was and was a dumbass and never bothered to fix it it lost connection at times and one of those times i imagined it tried to draw the ground from the rca's thus blowing them.
it was a pioneer and at least 2-3 people have told me this was also the same problem with theirs

Maybe the ground was a problem. It finally got warm here in Chicago, so i was looking over my connections and noticed one of my grounds was barely hanging on. i tightened everything up and turned it on and got nothing from the back speakers. Some people are cool with no rear fill, but i got used to it. I got no problem buying a new HU, but can the old one be fixed. I really liked the 690.

 

[suland 10+ year member]

First, check the RCA-cable, guys! It sucks very often!

 

[TurdFergueson2 5,000+ posts]

First, check the RCA-cable, guys! It sucks very often!

I did that. I moved the ones from my Sub outs to the bad rca outs and got no sound at all. Everything else works except for those 2 channels.

 

[Jekku 10+ year member]

Have you checked your HUs settings? Is the balance fader at center pos?

 

[TurdFergueson2 5,000+ posts]

Have you checked your HUs settings? Is the balance fader at center pos?

Yep. The only thing I haven't checked is that fuse on the back. I just figured if it was blown, nothing would work.

 

[Jekku 10+ year member]

Yep. The only thing I haven't checked is that fuse on the back. I just figured if it was blown, nothing would work.

Fuse behind the HU?

If the HUs own fuse is blown the HU wouldn't work at all.

 

[nismos14 5,000+ posts]

Swap the FRONT rca's with the rear not the sub.

 

[canadapettit 10+ year member]

Well the internal 4 amp fuse that is on the RCA lines is not blown, sounds like maybe you burnt the traces on one of them. Is it worth repair? depends on how much you like the radio. A typical repair on something like that costs about $65-$70 or so. But if you decide to repair it make sure you fix the root problem first or it will happen again.

 

[l7runner 10+ year member]

You can always try and ground the RCA's to the headunit.

Mine went out on my pioneer and the grounding fixed it right up