Static from amp channel

[bilug 10+ year member]

My PPI 4200AM started giving me static out of the right rear channel the other day. It is completely independent of any music or settings coming form the head unit.

It remains at a constant volume, and sounds like static that comes from radio stations. At least if I turn the volume up the static isn't completely audible.

Amp input? Output? Power supply issue?

Is it repairable?

Click to read more...

 

[nateberrier 10+ year member]

LOL ground your RCAs?

 

[Shinju 10+ year member]

Turn the gain pot up and down, Sounds like dust might have gotten into it, Those pots were notorious for doing that. Make sure your HU is on low volume before turning the gain up and down if the scrachy static noise goes away or gets less prominate keep doing it.

I had a Phoenix Gold amplifier do the same thing and all it took was turning the gain up and down a few times and it went away.

otherwise do the usual spot checks, change the RCA's from the front to the rear input and see if the static is isolated to your deck ect ect.

 

[bilug 10+ year member]

I've done all the troubleshooting....moving the RCA's around does not change anything.

I will try the gain pot and see what happens.

Please clarify about RCA grounds...but like I said, I've already troubleshot the problem and isolated it to the right rear channel of the amp.

 

[bilug 10+ year member]

So I pulled the amp today and took it apart. An inspection of the board showed both a bad solder at the input jack and the positive speaker lead for the right rear channel. I hit the spots with some fresh solder and put it back together....so far so good. Everything works, but since the static comes and goes, I won't know for another few days if it has fixed the problem....

 

[Ronny 10+ year member]

Usually constant static is attained from the gains being too 'high.'

I know on my active PPI Sedona series build, I have to keep the gains pretty far down to rid that constant static.

*Edit*

^ Ah, you ran into amplifier problems as well eh?

 

[bilug 10+ year member]

Not the gains....I've ruled them out. Also I think the static you are speaking of is different than the static I am getting.

 

[bilug 10+ year member]

Looks like my solder repair worked. No static yet!