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Home Forums Product Discussion & Questions BeoLab BeoLab 8000: suddenly switches to Off while playing music

Viewing 6 posts - 1 through 6 (of 6 total)
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  • #51660
    KolfMAKER
    SILVER Member

    I have one BeoLab 8000 (serial nr. 1086 xxxx) with strange behavior.

    My music source is connected via the RCA/Line input in the foot. The selector switch is set to  RCA/Line.

     

    This is what happens:

    • When I start playing music, it does not immediately switch to On. Only when I set the volume on my source quite loud (appr. 85%), the BeoLab switches from Standby to On.
    • After having played music, but at a lower volume level then that made the BeoLab switch On, the BeoLab 8000 switches back to Standby/Off after appr. 35 seconds.
    • When playing music on the same volume level as the level that made the BeoLab switch On, it keeps playing.

     

    Question

    • Anyone, any idea what could be wrong?
    Location: The Netherlands
    Favourite Product: BeoSound 9000
    #51661
    auric
    BRONZE Member

    The damping material has been known to degrade in Beolab 8000. Possible it has become conductive and shorting out some of the circuitry?

    #51662
    KolfMAKER
    SILVER Member

    Thnx for responding and sharing your suggestion Auric.

    Yes, I know about the foamrot issue. In this I did check all PCB’s, connectors, etc. for foamrot. Some copper traces have had a ‘by-pass’ already.

    What bothers me is that at high volume/signal strength the Stand-by/On switching works well. But at low volume/signal strength it doesn’t.

    Do you have any other suggestions?

    Location: The Netherlands
    Favourite Product: BeoSound 9000
    #51663
    auric
    BRONZE Member

    I don’t have any additional suggestions.

    My original thought was that the residue from the foam could be creating a short or adding some resistance hence higher signal goes through. But if the PCBs are all clean the fault is somewhere else.

     

    #51664
    Die_Bogener
    BRONZE Member

    The copper traces of the BL8000 pcb are very thin. Acid of the foam does it’s job.

    And when there are already a lot of “by-pass” repairs… ok, you will need some more.

    There is not only the amplifier. There is also a round board in the foot with the LED. This board gets all the acid and debris of the foam…  and is always forgotten…

    #51665
    KolfMAKER
    SILVER Member

    Thanks @Auric & @Die_Bogener

    I think what I will do next is switch the PCB with the LED. I have one of a working BeoLab 8000 that I can try if that makes a difference.

    Location: The Netherlands
    Favourite Product: BeoSound 9000
Viewing 6 posts - 1 through 6 (of 6 total)
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