Yamaha R-2000

Discussion in 'Yamaha' started by Rex Runner, Apr 13, 2018.

  1. Rex Runner

    Rex Runner Obsessed Addict Subscriber

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    Recent owner of a very nice Yamaha R-2000. Unlimited clean power. Nice. One issue. Ugly hum from phono section. Even without a table hooked up. Before I go digging. Any ideas?
     

     

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  2. OMGCat!

    OMGCat! AK Subscriber Subscriber

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    Likely bad solder joint I'd bet. If you wiggle the connectors does it go away or change?
     
  3. Rex Runner

    Rex Runner Obsessed Addict Subscriber

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    Hums without ANY connection
     
  4. avionic

    avionic " Black Knights " Subscriber

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    Both channels ?
     
  5. avionic

    avionic " Black Knights " Subscriber

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    If yes ---power source for the phono section ie dried out cap or broken solder connection in the power supply or to the phono circuit board.
    If no --- broken ground solder connection or a bad cap as well, for that channel.
     
    Last edited: Apr 13, 2018
  6. avionic

    avionic " Black Knights " Subscriber

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    How loud is the noise ? Is it a hum or static type noise ?
     
  7. Rex Runner

    Rex Runner Obsessed Addict Subscriber

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    Very audible hum
     
  8. avionic

    avionic " Black Knights " Subscriber

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  9. Rex Runner

    Rex Runner Obsessed Addict Subscriber

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    Yes. But I just noticed that the hum doesn't appear until receiver warms up. A bad cap does sound appropriate
     

     

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  10. homebrew

    homebrew Active Member

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    If all else fails, try this.

    upload_2018-4-14_10-40-49.jpeg
     
  11. Rex Runner

    Rex Runner Obsessed Addict Subscriber

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    Im sure a easy fix is in store. If all else fails a phono pre amp into aux. works. I was skeptical that a receiver boasting 150 WPC and not weighing 80 pounds. I stand corrected. Yamaha done good on this one. lots and lots and even more clean power. I like it
     
  12. avionic

    avionic " Black Knights " Subscriber

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    Do you know your way around a schematic ? A couple things need to be checked.
     
  13. Rex Runner

    Rex Runner Obsessed Addict Subscriber

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    I do. I havnt had time to open her up yet. Too many on going projects. The reason I asked originally was to see if this may have been a chronic issue with the R-2000
     
  14. avionic

    avionic " Black Knights " Subscriber

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    I was just going to say. Check your +12 volt supply feeding the auto phono processor IC402 pin 14 when the machine is acting up.
     
  15. avionic

    avionic " Black Knights " Subscriber

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    The 4558 opamp Vcc voltages as well IC401 pin 8.
     
  16. Rex Runner

    Rex Runner Obsessed Addict Subscriber

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    That I will. The job is always easier accepting advice from someone who has already been there. Thank you
     
  17. avionic

    avionic " Black Knights " Subscriber

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    That one 12v power source would mess up both channels.
     

     

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  18. avionic

    avionic " Black Knights " Subscriber

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    Any electrolytics connected to it are suspects as well.
     
  19. avionic

    avionic " Black Knights " Subscriber

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    MC headamp and Phono Equalizer opamps

    + and - 16vcc going to opamps IC110. And the + and - 27vcc going to IC111 & 112.
     
  20. SoCal Sam

    SoCal Sam Lunatic Member

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    The R-1000 and R-2000 were so close to greatness. If only Yamaha had implemented a fully synthesized digital tuner that was as reliable and effective as say the Concept 12.0D, it would have been a winner. Hope you get your phono amp sorted.
     

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