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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 10-15-2008 1:38 PM by lausvi. 4 replies.
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  • 10-09-2008 2:53 AM

    • lausvi
    • Top 150 Contributor
    • Joined on 04-16-2007
    • Helsinki - Finland
    • Posts 498
    • Gold Member

    One channel missing on Beocord 5500


    Hi.
    I got a Beogram CD 5500 and a Beocord 5500 for repair. The CD was told to be completely dead, but it was just a case of cracked soldering on power supply diodes. Resoldered and now works as new. (But, Martin, can you supply a new belt for the drawer mech, it's having troubles with the stage where the clamper goes down - the belt is slipping).
     
    Now I have the Beocord next to me. It's working otherwise Ok, but it produces sound only in one channel (left). What should I look for, more bad solder points or something else?
     
     
    --
    Ville
     

    Bang & Olufsen - The art of controlling sound, picture and light

  • 10-09-2008 8:48 AM In reply to

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

    Re: One channel missing on Beocord 5500

    I am not sure about the belt, I will have to check.

    The Beocord - check inside the DIN plug first.

    Martin

  • 10-09-2008 1:33 PM In reply to

    • lausvi
    • Top 150 Contributor
    • Joined on 04-16-2007
    • Helsinki - Finland
    • Posts 498
    • Gold Member

    Re: One channel missing on Beocord 5500


    I checked the DIN plug - nothing wrong in there.
    I took the deck apart. If I touch the soldering point with a screwdriver where the wires from the head connect to the thicker wire that goes to the big main board, there is a hum and I can get it to both channels. So I believe the amplifier section is working as should. Could the head itself be bad? 
     

    Bang & Olufsen - The art of controlling sound, picture and light

  • 10-09-2008 3:10 PM In reply to

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

    Re: One channel missing on Beocord 5500

    It could.

    Disconnect the head cable, put an ohmmeter across the heads coils and compare the two.

    Martin

  • 10-15-2008 1:38 PM In reply to

    • lausvi
    • Top 150 Contributor
    • Joined on 04-16-2007
    • Helsinki - Finland
    • Posts 498
    • Gold Member

    Re: One channel missing on Beocord 5500


    Hmm. I tried to measure it today. I found out that the other part of the head shows resistanse of around 240 ohms (I have no idea if this is Ok or not - at least this was the only reading I got) and the other shows infinite. So as far as I know the head would be open-circuit (same story with a Beocord 1500 deluxe open-reel some years ago). How easy/impossible it would be to get a replacement head?
     
     

    Bang & Olufsen - The art of controlling sound, picture and light

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