Restoring uncle's Sansui 9090DB

Discussion in 'Exclusively Sansui' started by Juan9568, May 5, 2018.

  1. Juan9568

    Juan9568 Member

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    77
    Location:
    Buenos Aires, Argentina
    I haven't done that yet...I'll try to figure out how to opening then without breaking anything.
     

     

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  2. imation_nation

    imation_nation Member

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    Sorry, I mistook the selector switch you cleaned up with the Dolby switch. How did you clean up the tarnish on the switch wafers on your selector switch.
     
  3. Juan9568

    Juan9568 Member

    Messages:
    77
    Location:
    Buenos Aires, Argentina
    Ah haha those...I remove them from the casing and then I let them sit in a contact cleaner solution for potentiometers and used a toothbrush to remove the black thing
     
  4. imation_nation

    imation_nation Member

    Messages:
    67
    One other question. I am looking for a list of caps to recap my 9090db. I had found a list on here before but have been unable to locate it. Do you have a list you would be willing to share?
     
  5. Juan9568

    Juan9568 Member

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    77
    Location:
    Buenos Aires, Argentina
    Yes I used Tom's full recap list. Here you go
     

    Attached Files:

  6. imation_nation

    imation_nation Member

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    67

    Oh, thanks. Yea, that was the one I had seen before, but had not been able to find recently. Did you pretty much follow what was on list?

    How is your project coming along?

    Steve
     

     

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  7. Juan9568

    Juan9568 Member

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    77
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    Yes I followed the list as it is but a few parts where obsolete or outdated so I had to look for replacements following the specs from the list...I used mouser, digi-key, think allied and NewarkElement to get almost everything.

    Overall is going well. Everything works but I still have to go over the dolby board and the push switch board that still has the original components
     
  8. Juan9568

    Juan9568 Member

    Messages:
    77
    Location:
    Buenos Aires, Argentina
    Finally the restoration is coming to an end.

    The problem I had with scratchy pots was a dolby board thing, it had a few traces gone so I had to fix that and also all the pass throughs + the recap.
    I still don't get the dolby test tone but I don't care cause it's useless nowadays (I think maybe the dolby chips are dead) but I do get clean sound on all inputs.

    Here some pics

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  9. imation_nation

    imation_nation Member

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    67
    Very impressive!!!
     
  10. AlTinkster92

    AlTinkster92 AK Subscriber Subscriber

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    Great Job on this! Inspiring to us all.
     
  11. avionic

    avionic " Black Knights " Subscriber

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    Did you leave tantalums on the F-2655? Looks great so far..:thumbsup:
     

     

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  12. Juan9568

    Juan9568 Member

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    77
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    I replaced the elctrolytics, ceramics and the green ones except 2 and I left the tantalums originals..should I replace them??
     
  13. Hipocrates

    Hipocrates Anti-Muppet Subscriber

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    I replace them... I just forgot the reason... I think it was something like they can get short or something like that.
     
  14. Juan9568

    Juan9568 Member

    Messages:
    77
    Location:
    Buenos Aires, Argentina
    My amp is working great, but suddenly now I get no lights from the front panel. It started flickering from time to time but today I tuned it on and no lights at all.

    Where should I check??
     

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