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B&O Beomaster 8000 wont power up.

I have a Beomaster 8000 that won't turn on anymore? The stand-by light illuminates. Occaisionally it with spring to life of its own accord, stay on for about 10 seconds then go to stand-by again. I have checked all fuses, I am getting 5V to IC3 + 4. Earths check out OK.

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  • dean4sam Jan 02, 2009

    It appears to have an earth fault on the main IC. I will let you know the outcome

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  • Master
  • 6,966 Answers

Hi and welcome to FixYa,

Initially, pls be informed that I am not familiar with the model. But with your indulgence, a couple of ideas on similar concerns you may want to consider/explore:

  • the illuminated standby light and the +5 VDC correlates;
  • "Occaisionally it with spring to life of its own accord" - do you mean simply power ON, or work as in sound is produced normally;
  • "stay on for about 10 seconds then go to stand-by" - indicates auto protect mode;
  • it would appear intermittent, then possibilities are leaky power supply capacitor, loose connection, cold solder (most likely), fault relay, relay driver, relay driver capacitor;
  • of course primary suspect would be the finals and presence/absence of +/- supply voltage.
Good luck and Thank you for using FixYa. Happy New Year.

Posted on Jan 01, 2009

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  • Master
  • 5,158 Answers

A component is overheating... likely in the power supply area. you need some compressed air to blow air on different parts till you narrow down what is overheating.

Robert

Posted on Jan 01, 2009

  • Roberta Smith
    Roberta Smith Jan 01, 2009

    you can get the service manual for that receiver here.
    http://www.hifiengine.com/manuals/bang-a...
    you'll need to register (free) please not when you look for the manual it's under bang olufsen

    Robert



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