Sanui AU-Alpha907 Limited - IN DA HOUSE!!!

Discussion in 'Exclusively Sansui' started by skippy124, Jun 22, 2015.

  1. JOMARK911

    JOMARK911 Super Member

    Messages:
    2,530
    Location:
    Athens Greece

    No, unfortunately no.
     
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  2. Djcoolray

    Djcoolray Addicted Member

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    6,292
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    A rocks throw from JBLM !!!!
    Yah....simply gorgeous !

    What an audiophile can do with that.....hook that puppy up !
     
  3. jayjayjayjay

    jayjayjayjay New Member

    Messages:
    27
    The elusive continues to hide from us.
     
  4. Bumpalump

    Bumpalump New Member

    Messages:
    17
    Location:
    Poland
    Quite low capacitance
     
  5. alan jackson

    alan jackson New Member

    Messages:
    1
    Any chance of obtaining a copy of 907 ltd manual as mine has one channel running far hotter than the other? Will be in Sydney next week and would like to meet up with your father as I missed him last year.
    Regards, Alan
     
  6. pete_mac

    pete_mac Super Member

    Messages:
    2,808
    Location:
    Sydney, Australia
    Sorry, I don't have that manual.
     

     

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  7. jayjayjayjay

    jayjayjayjay New Member

    Messages:
    27
    czubsi is the member you should look for asking help on the AU-x907Ltd. Don't ask for manual, just guidance. The manual is rare.
     
  8. craggd

    craggd AK Subscriber Subscriber

    Messages:
    418
    Location:
    NorCal
    I have the AU-α907 Limited owners manual (in Japanese of course). I could scan and post if that would be helpful to anyone.
     
  9. Leonid1001

    Leonid1001 New Member

    Messages:
    24
    All welcome! Please help the service manual for this amplifier Sansui AU-a907i Limited ( czubsi, craggd)
     
  10. Leonid1001

    Leonid1001 New Member

    Messages:
    24
    craggd - AU-α907 Limited owners manual throw him then
     
  11. craggd

    craggd AK Subscriber Subscriber

    Messages:
    418
    Location:
    NorCal
    I have posted the AU-α907 Limited owners manual (in Japanese) on Digital Docs.
     
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  12. Shavalievdd1

    Shavalievdd1 New Member

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    hello friends, just a small update about my 907 MOS limited, as i mentioned in my initial post I have cracking noise from one of the channels and fortunately I figured out the problem. I soldered small piece of wire between speaker output relay contacts and noise is gone. Actually this is quite dangerous as I bypassed the protection board. During 2 months testing period with bypass across the relay i realized that noise problem fully gone, and yesterday I removed the bypass and noise returned back. So looks like i need to clean the relay contacts. Any thought about this? may be i missed something and need to check something else in parallel as i'm going to open the protection board.

    hope my experience will help

    regarding the bias current - its still around 25-27mV and output transistors temperature is about 45-47C which is high but tolerable

    upload_2018-5-15_13-27-53.png
     
  13. Hyperion

    Hyperion Roobarb & Custard Subscriber

    Messages:
    46,753
    Location:
    Hertfordshire, UK
    You may get a very temporary improvement by cleaning the relay contacts, but my experience with speaker relays is that once they behave as you describe, the proper action is to replace it/them.
     
    Last edited: May 15, 2018
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  14. kevzep

    kevzep Its all about the Music Subscriber

    Replace the relays, cleaning the contacts is a complete waste of time.
    Just slip a new relay in and you'll be good for another 30 years...
     
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  15. Ronito6

    Ronito6 Super Member

    Messages:
    1,153
    Yes. Replacing the relay is the way to go.

    I would consider putting some fresh thermal paste on those outputs too. BUT ... that's just my habit of overkill.
     
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