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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 05-07-2008 1:22 AM by Christian. 4 replies.
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  • 04-27-2008 6:26 PM

    • Christian
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    Hiss from BM4500 - what might be the problem?

    Reply Contact

    Hi Smile

    My parents complains about a hiss from their Beomaster 4500. Their complete setup is the following: Beomaster, Beogram, Beogram CD 4500 connected to BeoLab 8000 (Main speakers) and Beovox CX100, RedLines through MCL.

    The hiss or buzz comes in various intervals and last under a second. It can be head from all the speakers, so I suspect the Beomaster to have some sort of short circuit.

    Do any of you have a possible explanation, or better a possible solution?

    Best regards

    Christian (on behalf of my dad...)

    Living room: BV7-40 mkIV + V8000, BL5, BL3, BM1 and BS9000. Bedroom: MX3000 and BL4500 on MCL2-AV. Around: PentaIII, CX100 and MCX35 on ML/MCL + MCL2-A, BeoPort and BL4 on ML, BS3300 + M75 as stand alone, BC6000 + BC600 and BT1100, LC1, LC2, Beo4, Beo5 and BL1000, BS2 and A8, EarSet2, Apron, Coffee mugs, Enamel Bagdes, Bath towel, Keyring, Books, Lots of miniature and the Bottle opener. Office: BC2300 + BL2500 and BS3. Summer house: BS Century.

    Addicted? Oh no.... ;)

  • 04-28-2008 12:15 PM In reply to

    Re: Hiss from BM4500 - what might be the problem?

    Reply Contact
    Does this occur when eg changing volume? Then it could be the powerlink cables that arent sheilded enough. Data transfer can disturb audio signal.

  • 05-04-2008 3:40 PM In reply to

    • Christian
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    • Joined on 04-16-2007
    • Copenhagen, Denmark
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    Re: Hiss from BM4500 - what might be the problem?

    Reply Contact

    It occurs randomly, and it is not related to changing volume, radio station etc.

    (Sorry for answering so late...)

    Do anyone have a clue to what might be causing the buzz/hiss?

    Living room: BV7-40 mkIV + V8000, BL5, BL3, BM1 and BS9000. Bedroom: MX3000 and BL4500 on MCL2-AV. Around: PentaIII, CX100 and MCX35 on ML/MCL + MCL2-A, BeoPort and BL4 on ML, BS3300 + M75 as stand alone, BC6000 + BC600 and BT1100, LC1, LC2, Beo4, Beo5 and BL1000, BS2 and A8, EarSet2, Apron, Coffee mugs, Enamel Bagdes, Bath towel, Keyring, Books, Lots of miniature and the Bottle opener. Office: BC2300 + BL2500 and BS3. Summer house: BS Century.

    Addicted? Oh no.... ;)

  • 05-05-2008 8:27 AM In reply to

    Re: Hiss from BM4500 - what might be the problem?

    Reply Contact

    It seems to me like a leaky capacitor mostly in the volume changing/switching circuitry.

    If the system is quite old then I would try resoldering all the joints in the above mentioned board first just to get rid of the chances of any dry solder issues.

    Hope this helps.

    Cheers,

    Rahul 

  • 05-07-2008 1:22 AM In reply to

    • Christian
    • Top 100 Contributor
      Male
    • Joined on 04-16-2007
    • Copenhagen, Denmark
    • Posts 626
    • Bronze Member

    Re: Hiss from BM4500 - what might be the problem?

    Reply Contact

    I will try to have a look at the service manual then, and see if I can locate the volume circuitry.

    Thanks!

    Living room: BV7-40 mkIV + V8000, BL5, BL3, BM1 and BS9000. Bedroom: MX3000 and BL4500 on MCL2-AV. Around: PentaIII, CX100 and MCX35 on ML/MCL + MCL2-A, BeoPort and BL4 on ML, BS3300 + M75 as stand alone, BC6000 + BC600 and BT1100, LC1, LC2, Beo4, Beo5 and BL1000, BS2 and A8, EarSet2, Apron, Coffee mugs, Enamel Bagdes, Bath towel, Keyring, Books, Lots of miniature and the Bottle opener. Office: BC2300 + BL2500 and BS3. Summer house: BS Century.

    Addicted? Oh no.... ;)
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