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990DB Project Thread

Discussion in 'Exclusively Sansui' started by dpcornell, May 10, 2018.

  1. avionic

    avionic " Black Knights " Subscriber

    Messages:
    43,711
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    Fort Dodge, Iowa
    I have seen that as well. Had me scratching my head for a bit.
     

     

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  2. kevzep

    kevzep Its all about the Music Subscriber

    Yep I have seen that too, happened to me on my G22000, and my G9000, I had a QRX8001 come in for a input selection fault which was the same thing.

    I think the deoxit dissolves or weakens the small dob of glue they put on those shafts.

    I put a small amount of Silicon glue/sealant on the shaft, in the inside of the last wafer if I can get to, that solves the issue...
     
  3. Sonytubes

    Sonytubes Active Member

    Messages:
    203
    Location:
    San Francisco Calif.
    Interesting! Can you post a picture of the shaft issue?
    Thanks for the write up.
     
  4. dpcornell

    dpcornell AK Subscriber Subscriber

    Messages:
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    Thanks. That is in my shopping list for my next trip to the hardware store. I don't suppose there is a method to glue the shaft further into the switch?
    I will look at some disassembly guides.

    I sure can when I get the dolby board out (for like the 4th time now).
     
  5. kevzep

    kevzep Its all about the Music Subscriber

    I do it that way, so its easy to take it apart when you have to remove it and dismantle in the future....only take a little dab, as they say, a little dab will do ya....
     
  6. dpcornell

    dpcornell AK Subscriber Subscriber

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    IMG_20180516_1742536.jpg Before, you can see how far out the shaft of the switch is (I pulled it out slightly so you could see it better).
    IMG_20180516_1743057.jpg Here it is after I pushed it back.

    I am having some trouble accessing the shaft to put the silicone on it. I tried using one of my electronics screw drivers to place it in between the last wafer and the black board. I don't know if it will hold. I may have to seek a more permanent solution by putting silicone inside the actual switch knob. Unfortunately I may have to actually take it further apart than I had planned in order to do that....
     

     

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  7. kevzep

    kevzep Its all about the Music Subscriber

    Yeah the ones I have done were a bit easier to access than that one. She's fully crammed that one!!
     
  8. avionic

    avionic " Black Knights " Subscriber

    Messages:
    43,711
    Location:
    Fort Dodge, Iowa
    The one I had. The shaft " clicked" into place securely.
     
  9. dpcornell

    dpcornell AK Subscriber Subscriber

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    Unfortunately, each time I turn the Dolby knob the shaft backs out just enough to cause audio issues. I will take another crack at it when I do a full recap and relamp.
    In the mean time it is getting some play time. Man, does it get loud!
     

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