Sansui AU-X11 repair and restoration

Discussion in 'Exclusively Sansui' started by smurfer77, Sep 23, 2016.

  1. Ronito6

    Ronito6 Super Member

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    1,210
    I can send you a 2sk97.

    PM me your address and I can have you can have it in hand by next Friday.

    If you can figure a contemporary replacement....the world will be a better place.
     
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  2. BLAH BLAH

    BLAH BLAH AK Subscriber Subscriber

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  3. Overundr1

    Overundr1 AK Subscriber Subscriber

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    That would be interesting. Also, have one inbound myself from Canada, once I get it changed out would be glad to send you the old one to verify its suspected failure. When I pulled it the circuit board underneath it was pretty toasty. Testing dual fet's correctly is above my pay grade, my training (by choice) ends with critters that have three legs or less, discounting those special critters with glass containers :)
    -Lee
     
  4. Ronito6

    Ronito6 Super Member

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    A Tale of Two Transistors
     
  5. Serggsa

    Serggsa New Member

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    Than it is possible to replace 2SK146?
     
  6. smurfer77

    smurfer77 AK Subscriber Subscriber

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    For completeness, here is the link to the 2sk97 thread I promised after receiving a sample for Ronito. About the 2SK146, I'm not familiar with that one yet.

    No update on the AU-X11s, or anything else, as I'm still stuck overseas. But will be home next week!
     

     

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  7. Serggsa

    Serggsa New Member

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    [​IMG]

    It is no absolutely clear according to the instruction for what the resistor is necessary IVR-2?
     
  8. Hyperion

    Hyperion Roobarb & Custard Subscriber

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    Looks like you need to set it for 0V - the adjustment is titled 'Centre DC [0] adj-servo Adj- L & R ch'.
     
  9. Serggsa

    Serggsa New Member

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    Tuning resistor IVR-2 is exposed in average position and moved it to the right or to the left if there is no range of moving of resistor IVR-1?
     
    Last edited: Jul 12, 2017
  10. Hyperion

    Hyperion Roobarb & Custard Subscriber

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    I can't read the above - but I'll guess the answer to your question is "There are different test points (TP) for the VR1 and VR2 measurements" - the document contains an error referring to TP-1 for both adjustments.

    For VR1 - (TP-1) near the output transistors on the schematic shown.
    For VR2 - (TP-2) near the OP amp at the bottom of the schematic.
     
    Last edited: Jul 12, 2017
  11. Serggsa

    Serggsa New Member

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    Thanks for an explanation.
    Who made control 0?
    Really in the scheme an error?
     
    Last edited: Jul 12, 2017

     

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  12. Hyperion

    Hyperion Roobarb & Custard Subscriber

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    "Who made control 0" - sorry, I don't understand what you are querying.
    There are often errors in hi-fi service documentation, Sansui is often guilty of this, you just have to work it out for yourself. Unless someone has documented it here on AK - which is increasingly common now. :thumbsup:
     
  13. Serggsa

    Serggsa New Member

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    Prompt pressure on an exit F-3463 Regurated Power Supply for Head Amp MC and MM .
    10.5V and 47.5V, same as Sansui AU-X1?
     
  14. SanthoshA

    SanthoshA Active Member

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    I myself have recently sourced the Sansui AU-X11, it arrived at my home a day back, it works perfectly with no issues, i am using it with a 100volt step down converter.
    Is there anything i need to check say for example the basis in order to ensure it works fine in a long run.
    I am yet to open it up and inspect the boards inside.

    Can some please help with the service manual for the AU-X11, i can only find the service manual of the AU-X1 online.
    Also what is the nominal DC bias value for the left and right channel to adjust bias, i would like to check and see if the bias is consistent and steady across both channels.

    Thanks in advance for your time and support.
    I am also going through threads and posts that would be useful for my restoration.

    Attached are the pics.
     

    Attached Files:

    Last edited: Sep 19, 2017
  15. Hyperion

    Hyperion Roobarb & Custard Subscriber

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    @SanthoshA - please start your own thread, otherwise it causes confusion.
     
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  16. Serggsa

    Serggsa New Member

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    [​IMG][/ QUOTE]
    Проверьте. У тебя ошибка На плате не корректен транзистор Q1. Должен быть Q1-C1845.
     

     

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  17. smurfer77

    smurfer77 AK Subscriber Subscriber

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    Thanks. Yes it looks like you are correct, Q1 should be C1845. Here are the latest corrected versions of the driver board images - I don't doubt thee are other errors so please use with caution and always check what you have in your own boards.

    [​IMG] [​IMG]
    [​IMG]
     
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  18. Serggsa

    Serggsa New Member

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    Правильный.
     

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  19. smurfer77

    smurfer77 AK Subscriber Subscriber

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    Last edited: Jan 8, 2019
  20. smurfer77

    smurfer77 AK Subscriber Subscriber

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    Thanks. Will edit/correct.
     

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