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01-12-2009, 03:57 PM
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#1
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Registered User
Join Date: Nov 2009
Posts: 14
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pioneer DEH-P7000UB interferance
hi i have a pioneer DEH-P7000UB head unit i fitted it yesterday it works fine until i plug my sub RCA lead into the sub pre out on the back of the head unit it then starts to make thuding noises as i go through my settings and makes a massive thud when i turn the ignition off or when i turn the headunit off i was just wondering if anyone could help?????????
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01-12-2009, 05:06 PM
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#2
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Bite my shiny metal amp!
Join Date: Sep 2004
Location: Nr. Cambridge
Posts: 2,074
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Do you also get a whine when the engine is running?
This will be an earthing issue and given that it happens with the controls, likely to be in the head unit.
Some Pioneer units are know to blow earth tracks if misstreated by accident and this could well be the cause.
Otherwise check your wiring to the amp and how you have it earthed. A ground offset between the headunit and amp might be an issue.
James
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01-12-2009, 05:16 PM
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#3
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Registered User
Join Date: Nov 2009
Posts: 14
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?
it dosent get any interfearence from the engine i have checked because i moved the power and rca leads to oppersite sides. and if i unplug the rca leads from the head unit and have no amp attached it works fine and there is no interferance at all so i am confused
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01-12-2009, 07:46 PM
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#4
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Registered User
Join Date: Nov 2009
Posts: 14
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?
does anyone have any ideas ???? coz its confusing me and i havent realy got the technical know how..
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02-12-2009, 04:26 PM
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#5
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Bite my shiny metal amp!
Join Date: Sep 2004
Location: Nr. Cambridge
Posts: 2,074
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Quote:
Originally Posted by jaz28-12-88
does anyone have any ideas ???? coz its confusing me and i havent realy got the technical know how..
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As I said, earthing issue, most likely in the head unit.
James
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02-12-2009, 04:35 PM
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#6
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Regular Forum User
Join Date: Sep 2008
Posts: 346
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Undo and reconnect all wires at your amps as a start. Check all wires are terminated cleanly and fully inserted into the connectors (no bare wire showing). I had the same issue and can only put it down to a stray strand of copper around the terminals because this all I did to solve it.
Once done, you can check that off and tackle any headunit issues if needs be
Keep us updated
Smithy
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02-12-2009, 04:43 PM
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#7
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Regular Member
Join Date: Jan 2007
Location: worcestershire
Posts: 5,035
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Quote:
Originally Posted by PiMan
As I said, earthing issue, most likely in the head unit.
James
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This ^^
There is any easy way to check in the FAQs.
The permanent fix is slightly trickier to carry out but mine has been ''temporarily'' fixed for over a year, you just need to be careful in the future when disconnecting and reconnecting things.
http://www.talkaudio.co.uk/vbb/showt...70#post2897270
earth track fix link^^
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03-12-2009, 12:22 PM
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#8
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Registered User
Join Date: Nov 2009
Posts: 14
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grounding
cheers lads am going to have ago at the grounding points on saterday. the amp is built into the speaker because it is a vibe blackdeath sub so all i had to to is put the earth, bat+ and remote into the back
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