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ARCHIVED FORUM -- April 2007 to March 2012
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This is the first Archived Forum which was active between 17th April 2007 and 1st March February 2012

 

Latest post 04-06-2009 12:28 PM by Dillen. 8 replies.
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  • 01-21-2008 4:39 PM

    Problem with Beolab Penta (Beolab 150)

    I've faced a problem: one of Beolab Penta loudspeakers has stoped working!  It seems that the amplifier (which is supposed to be Beolab 150) no longer works: no red/green indication when it is connected to the power point.

    Ideas what it could be and how to repair it?

    Appreciate any help.

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  • 01-22-2008 4:15 AM In reply to

    • Dillen
    • Top 10 Contributor
    • Joined on 02-14-2007
    • Copenhagen / Denmark
    • Posts 5,008
    • Founder

    Re: Problem with Beolab Penta (Beolab 150)

    Welcome to Beoworld !

    Maybe your Beolab Penta has blown an internal fuse. There are two fuses located inside, near the transformer in the bottom.

    Martin

  • 01-22-2008 6:08 AM In reply to

    Re: Problem with Beolab Penta (Beolab 150)

    Thanks for help, it may be the problem actually!

    But I cannot get inside the bottom of speaker (amplifier) -- it seems to be locked from inside.. Is there any instructions how to open it?

  • 01-22-2008 6:44 AM In reply to

    • Dillen
    • Top 10 Contributor
    • Joined on 02-14-2007
    • Copenhagen / Denmark
    • Posts 5,008
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    Re: Problem with Beolab Penta (Beolab 150)

    I normally do older stuff but I have serviced some Beolab Penta's and if I remember correctly there is a cover held by a single screw in the connector bay.

    Usually, there's a reason for a fuse to blow but I've had more than one case where a fuse was actually the only faulty component in a Beolab Penta. There are two fuses in each speaker, one for the amplifier section and one for the electronics (link control etc.). Make sure you replace with the same type and rating of fuse. In your case, with no light at all, the fuse for the eclectronics would be the most interesting one.

    Of course there can be other causes but checking the fuses would be the place to begin.

    Martin

  • 02-02-2008 11:57 AM In reply to

    Re: Problem with Beolab Penta (Beolab 150)

    Yeah, exactly : there are two fuses 2A and 40mA and 40mA fuse blown.

    But! Now I cannot find another 40 mA fuse in entire Oslo. The closest I found was 50 mA. Is it OK to use it or should I  keep trying to find exactly 40 mA one?

  • 02-03-2008 8:41 AM In reply to

    • Dillen
    • Top 10 Contributor
    • Joined on 02-14-2007
    • Copenhagen / Denmark
    • Posts 5,008
    • Founder

    Re: Problem with Beolab Penta (Beolab 150)

    50mA will be within tolerances, so OK.

    Martin

  • 02-07-2008 3:43 PM In reply to

    Re: Problem with Beolab Penta (Beolab 150)

    It perfectly works now!

    Thanks a lot!!Smile

  • 04-06-2009 10:13 AM In reply to

    • PeterK
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    • Joined on 04-06-2009
    • Posts 1
    • Bronze Member

    Re: Problem with Beolab Penta (Beolab 150)

    Hello

    One of my beolab penta´s just stopped working, no light no nothing. I checked the fuses and the 40amp one was blown, i replaced it and it blew again. What could be the problem and were should i start to look?

    Anyone had a similar problem with there pentas?

    /peter

  • 04-06-2009 12:28 PM In reply to

    • Dillen
    • Top 10 Contributor
    • Joined on 02-14-2007
    • Copenhagen / Denmark
    • Posts 5,008
    • Founder

    Re: Problem with Beolab Penta (Beolab 150)

    Hi Peter,

    Welcome to Beoworld !  Yes -  thumbs up

    Just wanted to make sure that you put in a 40 mA (rather then 40 A) fuse ?

    There' will be a problem in the logic control of the amplifier.
    A bit hard to diagnose "per remote" but if you have a multimeter and a bit of
    electronic knowledge, we can guide you along a bit.
    If you are not sure this is a task for you, I recommend you bring it in for service.
    It doesn't sound like an expensive repair to me. Most likely candidates are rectifier and one or more capacitors.

    Martin

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