Does anyone know what this is called? I need to make or buy a replacement power supply... original is lost. I'm not even sure what this is. 3-pin DIN? But what's the notch at the bottom?

Thanks in anticipation

 

The notch is for alignment, so the pins always are connected correctly. Google 3 pin DIN plug and check the mechanical connection specifications. Make sure the diameters match up. One issue you will run into is how the three pins are assigned. The powered device schematics or tracing its circuit board may answer that question.

 

Thank you!

 

Unfortunately, that is a non-standard connector. I would replace it with a readily available style. You should be able to find a panel mount version that has those centers, and the mating connector will be easy to get, too.

 

I should say, it is a non-standard configuration of standard mini DIN housing, so you can get something that will fit in the space.

 

I thought it looked odd. Thanks for this. All the more incentive to find the original PSU but if I can't, opening the machine up (a very old midi keyboard) might be on the cards!

 

I thought it looked odd. Thanks for this. All the more incentive to find the original PSU but if I can't, opening the machine up (a very old midi keyboard) might be on the cards!

I am guessing it won't be too hard to work on. But were it me, I'd probably switch to something like a coaxial (barrel) connector assuming it's not a double-ended +9V/-9V supply, which unfortunately it might be.

 

I am guessing it won't be too hard to work on. But were it me, I'd probably switch to something like a coaxial (barrel) connector assuming it's not a double-ended +9V/-9V supply, which unfortunately it might be.

Can you tell us the dimensions,
ay be a sketch with dimensions on

It does look much like a Din socket
but if thats power in,
it would mean the plug has live pins,
which although 9v, would be unwise to be exposed,

 

Can you tell us the dimensions,
ay be a sketch with dimensions on

It does look much like a Din socket
but if thats power in,
it would mean the plug has live pins,
which although 9v, would be unwise to be exposed,

Just clarify, are you suggesting a coaxial power connector would expose live contacts?

It's a very common choice for 5-24VDC. The center female contact, which is V+ is not exposed. In fact, it's lead exposed that the male mini-DIN that female connector accepts. There are a lot of options. These pigtailed panel mount jacks are nice because they are IP67 rated and of course there are a lot of options for the male connectors.

​

I am not sure you were talking about the coaxial connecter, so just making sure I understand.

 

Does anyone know what this is called?

That's a standard 3 pin female DIN connector. Is that part defective or is it the cable and matching male connector?

https://www.jameco.com/z/SD-30SN-Jameco-Valuepro-3-Pin-Metal-Female-DIN-Socket_2235971.html?

https://www.jameco.com/z/MD-30-Jame...m3YKPVszDOGvLy9uEHkGcI741GZjioygaAvUYEALw_wcB

 

That's a standard 3 pin female DIN connector. Is that part defective or is it the cable and matching male connector?
View attachment 259216
https://www.jameco.com/z/SD-30SN-Ja...w7mF6wN315RkDGCJm-7bjWL9IwTuP3Q0aAhwVEALw_wcB

It appeared to be a mini-DIN but they have keys, I may just have been fooled by the scale. But one of the problems with DIN connectors is there are non-standard geometries and comparing the photo you provided to this one I am not entirely convinced it is the same pin layout. We had this problem a lot in the 80's, slightly different layouts making them frustratingly incompatible.

​

But if it is full sized, and it looks like it could be, there is a good chance of finding one. So @Mooshun, you should carefully measure the diameter of the connector face and that will immediately tell if it is full sized or mini. I hope it is full sized because it makes things a lot easier.

 

Looks like a standard size 3-pin DIN.
Needs a plug like this
https://cpc.farnell.com/pro-signal/psg01552/plug-din-3p/dp/AV15010?st=3-pin din

 

It looks to have a diameter of about 14mm.

 

That's a standard 3 pin female DIN connector. Is that part defective or is it the cable and matching male connector?
View attachment 259216
https://www.jameco.com/z/SD-30SN-Jameco-Valuepro-3-Pin-Metal-Female-DIN-Socket_2235971.html?
View attachment 259220
https://www.jameco.com/z/MD-30-Jame...m3YKPVszDOGvLy9uEHkGcI741GZjioygaAvUYEALw_wcB

Hi, it's not defective. I've just lost the original PSU and was hoping to use one I have which has a variable voltage selector but needs the right tip to plug into this device. I don't have any other details of the power requirement so I know there's some risk but they stopped making this MIDI keyboard about 20 years ago so I don't mind taking the risk of frying the insides (although I'd prefer not to!)

 

It looks to have a diameter of about 14mm.

Hey, Mooshun. That would be a full sized DIN connector! Which is good news. Sorry for misleading you, I was somewhat confused about the scale. There was plenty of evidence that it was not mini, somehow I just ignored it. I apologize.

Now you'll need to know the pinout. What is the make and model of the keyboard?

With some luck it will be a single=ended supply and simple to replace.

 

@Yaakov heavens, no apology necessary! I've been amazed by how helpful people have been in response to my rather vague enquiry

The keyboard is a Cheetah Master Series 5V. As I said, it's a MIDI controller keyboard used to control synthesizers and the like.

I was wondering if it might be possible to convert/adapt something like a 2.1mm barrel connector to 3-pin din because I have a power supply with a switch that lets me select the output voltage. It comes with a selection of tips but not one for 3-pin din. Do you think that approach might be possible?

 

There’s probably a good reason why they used a 3-pin connector. Does it supply +9V, -9V and 0V?

 

There’s probably a good reason why they used a 3-pin connector. Does it supply +9V, -9V and 0V?

That unfortunately I do not know. If I could find the old PSU (still not given up hope!) it might say. But then my original problem would be solved anyway

 

So, a bit of research has me less concerned that it is a double-ended supply. It's a purely digital affair, based on a M50734SP processor and all stock RAM and ROM.

Nary an opamp in sight.

So, I can't conclude with certainty but I am 90% convinced it will be a simple +9VDC at a couple of amps.

 

@Yaakov thank you. If I might ask, where did you find your information? I could find little about the product when I searched.