Maintaining a Sansui AU-517

Discussion in 'Exclusively Sansui' started by Tdogzthmn, Mar 10, 2017.

  1. Tdogzthmn

    Tdogzthmn Member

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    Hello,
    I recently purchased a Sansui 517 in great condition from a seller off Craigslist. Prior to picking up the amp, I had been reading that it can be a good idea to replace/upgrade some of the capacitors and resistors to bring the amp back up to spec.

    Before deciding to make any alterations or repairs, I though about bring the unit to a local repair shop that advertises its work on vintage audio gear to check if the amp is functioning optimally. If the amp is functioning properly is there still a need to recap it?
     
  2. inductor

    inductor Super Member

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    been answered in another section
     
  3. Hyperion

    Hyperion Roobarb & Custard Subscriber

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    They can test it and tell you it's functioning optimally, but if it sounds lifeless (which is likely at this age) then it needs to be reconditioned - and I don't mean 'recapped' I mean reconditioned, in my book there is a difference. However, if they test it and say it's OK - and you like the sound of it, then that's OK too.

    NB: Tdogzthmn - It's considered bad form to post the same question twice.
     
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  4. Tdogzthmn

    Tdogzthmn Member

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    Once I'm able to discuss the amp with the repair technician I will follow up in this thread.

    I've been trying to learn more about the usual issues with these amps so I can properly vet the repair shop's knowledge of Sansui gear.
     
  5. roger2

    roger2 . Subscriber

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  6. Tdogzthmn

    Tdogzthmn Member

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    Does anyone have tips for removing that reddish brown glue that was used under the capacitors? Is a solvent required or can it be chipped away without damaging the board or surrounding components?
     
  7. Hipocrates

    Hipocrates Well-Known Member

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    A drop of acetone and a wooden little stick, is what I use. After that, alcohol and a q-tip.
     
  8. Hyperion

    Hyperion Roobarb & Custard Subscriber

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    I am pleased to see you ask about this, :) essential in my opinion, but so often forgotten.
     
    Last edited: Mar 11, 2017
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  9. Overundr1

    Overundr1 AK Subscriber Subscriber

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    Quote --- A drop of acetone and a wooden little stick, is what I use. After that, alcohol and a q-tip.
    Forgot to add the gallon of patience :)
     
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  10. Hyperion

    Hyperion Roobarb & Custard Subscriber

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    And some of the alcohol should be taken orally for stress free results. :D

    (a somewhat different kind of alcohol - to be clear ;) )

    Edit update
    And in other news, I have just refitted the power modules to the AU-517 I am reconditioning, DC offset and bias set perfectly. I have to do 'the business' to the Phono amp and remount the new speaker terminals, then it is done.
     
    Last edited: Mar 11, 2017
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  11. Tdogzthmn

    Tdogzthmn Member

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    I do have some nice japanese whiskey that ought to do the trick!
     
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  12. Tdogzthmn

    Tdogzthmn Member

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    I'm now in possession of the amp and overall its in great condition. There are some minor scratches on the top and sides which I can sand and repair easily. The faceplate is very nice but there are one or two tiny scuffs that I'd like to address. The aluminum black seems to be a good method to address these but i'd like to hear for others who have restored amps.
     
  13. LBPete

    LBPete Rolling Along Subscriber

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    Please post the serial number for the database.

    - Pete
     

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