Question about 2005 BMW X5

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Bmw X5 2004 has heterodyne over audio

On use of analogue television a whine or heterodyne is heard over the audio
after about ten minutes of operation and does not stop
digital TV ok ,audio and radio ok, just analogue TV
PS BMW have changed reciever amplifier box in rear tyre well but heterodyne is still there

Question is there a separate power supply for the reciever /amplifier somewhere in the vehicle

thanks Alan

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If it is only on analog tv, then it must be an interference on aerial cable

Posted on Jun 06, 2008

  • Ginko
    Ginko Jun 06, 2008

    The power supply for the receiver is always the battery, the power adapter is inside the receiver.
    If you have an interference or noise only on analogue tv, then, as already stated it is an interference on the aerial cable, orr if you have an active (amplified) tv aerial it can be a fault on the aerial signal booster, that is integrated with the receiver.
    Check the aerial cable, eventually disconnect the aerial, and check if you get the noise when receiving the blank signal on tv.
    If you get interference with aerial unplugged, then the analog tv receiver is faulty, if not it is the aerial.



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