I'm holding a connector that looks just like a 4-pin mini din male plug, except that the plastic prong is in the wrong place and there is an extra metal strip, wide, thin and too short to be a pin, where the standard mini din plastic prong should be.

It is used to connect the pedals to the main body in my Korg EC310 digital piano.

unknown connector

different angle

enter image description here

  • 1
    \$\begingroup\$ Are you in a concrete building? My psychic powers seem to be too weak today to have a look at the plug, maybe put it outside so I can try again? \$\endgroup\$ – PlasmaHH Feb 17 '15 at 10:56
  • \$\begingroup\$ @PlasmaHH Sorry about that. Pics added. \$\endgroup\$ – João Mendes Feb 17 '15 at 11:00
  • \$\begingroup\$ Can you give us a photo of the outside of the plug too? \$\endgroup\$ – Will Feb 17 '15 at 11:05
  • \$\begingroup\$ @Will It was shredded and in the garbage, but I recovered it for you. Here you go. \$\endgroup\$ – João Mendes Feb 17 '15 at 11:19
  • \$\begingroup\$ Might be compaitble with an s-video connector as its a mini din with a flat blade where yours is. No lump in the middle though \$\endgroup\$ – Will Feb 17 '15 at 12:13

Turns out this was a lot simpler than I thought.

That horizontal metal tab is not a tab, but a bent pin, only it was so bent that only after removing the plug shell were we able to see it.

The plug is a plain old 5-pin mini-DIN.

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