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pioneer DEH-P880PRS RCA noise problem. HELP ASAP

Old 08-12-2007, 11:34 PM
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pioneer DEH-P880PRS RCA noise problem. HELP ASAP

I have been searching a good while today and I haven't come up with a solid answer about my problem. or maybe I did but I need conformation. so don't flame me I HAVE been searching. ;p

anyway I just hooked up a new 2channel amp up to my pioneer deck

and I am getting major noise coming out of the speakers. kind of a humming popping buzzing noise haha. yeaahh.

and lets say when I change a song it will change sound, or when I load up a CD you can hear that noise through the speakers. so I have reason to believe it is the DECK because the sound from the deck is coming through the RCA's

to make sure I hooked my ipod up instead of the deck and the problem went away.

so my question is how do I fix this.


EDIT: the car is NOT running at the time of this. so not Alt noise.

Last edited by iLLlegal; 08-12-2007 at 11:40 PM.
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Old 08-13-2007, 02:56 PM
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Common problem with Pioneer decks - they have really shitty ground traces inside. Try grounding the outer conductor on the RCAs coming out of the radio.
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Old 08-13-2007, 03:37 PM
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Originally Posted by Dukk
Common problem with Pioneer decks - they have really shitty ground traces inside. Try grounding the outer conductor on the RCAs coming out of the radio.
True, i had the same problem with my 680mp, grounding the rca's onto the deck worked for me.
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Old 08-13-2007, 08:26 PM
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It's not the deck's fault. It's an installer mistake issue.
The ground into the RCA's is designed to burn(a fuse) if the amp's ground fails. This is to protect the rest of the deck from potentially high amperage from an ungrounded amplifier tryng to get ground thru the deck's ground.

Think about it...A 100+ amp fused 4 or 0ga full of electrons, with no place to go but thru your RCA's to get home.
If it's under warranty, get it fixed, but you can just ground the RCA's to the can of the deck if you wish.
Any system with an amp should always maintain an excellant amp ground until all other wires have been disconnected from the amp.
In other words NEVER disconnect your amp's ground before removing the RCA's, and ALWAYS connect the amp ground first.
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Old 08-14-2007, 02:30 AM
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ok ill try and ground the RCA's to the deck tomorrow and ill post back my results. ill even ground the back of the deck as well as double check the harness ground. I am very certain the very FIRST thing I did when I put the amp in the car was ground it. I will also double check that.
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Old 08-14-2007, 02:52 PM
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Charlie - your advice about grounding is good but this is not always an installer error. This is a weak point in Pioneer's headunits. They have this issue, in my estimation, 10x more than all other brands.
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Old 08-14-2007, 03:16 PM
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It is definitely a known issue with the design of the circuit, no doubting that, but for the damage to be caused, Charlie is pretty much bang on with his diagnosis of how the damage happens most of the time.
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Old 08-14-2007, 04:59 PM
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I have seen customer installed amps do the same thing to clarion radios.

Hell had one customer replace his clarion with a pioneer then did the same thing.
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