Need help identifying Green Ceramic Capacitor in Yamaha DX7IIFD

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  • steamed_hams
    New Member
    • Dec 2014
    • 2
    • United States

    #1

    Need help identifying Green Ceramic Capacitor in Yamaha DX7IIFD

    I need help repairing my Yamaha DX7IIFD keyboard. I was installing the E! Grey Matter Response card, and I had to pry out the IC23 chip. While doing so, I heard a crack. When I looked down, I had saw that I broke an internal piece by accident!
    http://imagizer.*************/a/img540/6044/bZxvvx.jpg

    It's a ceramic disc capacitor that says "16x 104m" on it. It's listed in the service manual as part C33 on the DM board, but it doesn't list the name as far as I can tell. I need to know the specific name of this component so I can find a replacement ASAP if it's even possible any more.

    I know 104m is 0.1uf with +/- 20% tolerance, but I don't know what "16x" means. I can't find the exact match for this capacitor, just orange capacitors that just say "104". Another site I asked this on said the capacitor will still work fine with the chip, but I don't believe that at all. It's significantly damaged. Other sites have said that any voltage 0.1uf capacitor should work, but none of those people were certified professionals.
  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 31015
    • Albion

    #2
    Re: Need help identifying Green Ceramic Capacitor in Yamaha DX7IIFD

    it's just for the logic power,
    any 0.1uf ceramic will do as long as it fits.
    i'd use a milti-layer ceramic, they are smaller.
    or an axial multilayer ceramic even.

    you should be able to find what you need on anything with digital chips on it.

    you can even use surface-mount ones.

    Comment

    • SteveNielsen
      Retired Tech
      • Jun 2012
      • 2327
      • USA

      #3
      Re: Need help identifying Green Ceramic Capacitor in Yamaha DX7IIFD

      Actually the advice you've gotten is ok.

      Any .1uf cap of sufficient voltage rating will work. That's probably a 100v or higher cap judging by the size.
      The 16x might indicate the voltage rating but I'm not familiar with that way of marking. That's a digital synth so the voltages used by the chips is going to be pretty low, probably 5v.

      The cap may actually still work as it is believe it or not. It looks like only the edges of the plates got dinged and unless they are shorted together it probably is still about .1uf. I'd replace it anyway though, the exposed plates will corrode in time.

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: Need help identifying Green Ceramic Capacitor in Yamaha DX7IIFD

        http://pdf1.alldatasheet.com/datashe...BA/TC5564.html
        5V RAM IC, so anything above 10V will be fine as long as it fits the foot print.
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

        Comment

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