Help needed with power supply pinout for PC2X/PC2R (PM0025-001)

[sunspot]

Hi, I`m trying to build a replacement unit since I`ve lost my original PSU for PC2X.
I`m looking for someone with original PM0025-001 so he could measure the output with DVM and tell which pins have +9V/-9V and 14V

 

[happyrat1]

Contact Kurzweil Support.

They’re excellent at providing legacy support for DIY repairs.

Kurzweils are like Subarus.

Their longevity is their best endorsement.

Gary.

 

[sunspot]

Thanks for the idea.
Do you by chance have a email I could reach them with?

 

[happyrat1]

Just visit their website and follow the links.

I’m on my phone and can’t do it for you.

Gary.

 

[sunspot]

my search came up with these two options: (e-mail address removed) or (e-mail address removed).
Are they even close?​

 

[happyrat1]

The Kurzweil link is bang on.

The other might be a local distributor.

They might not handle legacy products.

There are also used parts places on the web who might have one in stock and don’t forget to check EBay.

Gary

 

[happyrat1]

Item is listed here as out of stock but you can add yourself to a waiting list.

Power adapter, 9VDC and 14VAC

Kurzweil power adapter, 9VDC and 14VAC outputs. This external power supply is Kurzweil part number NO12104203, and is for use with 120V North American mains voltages only.

syntaur.com

They might be able to provide a pinout as well.

Gary

 

[happyrat1]

Here's one for sale in stock for ridiculous money.

Kurzweil PC2, PC2x and PC2R Power Supply. Kurzweil PM0025-001 Compatible. | Reverb

We've designed a 100% compatible Power Supply for the Kurzweil PC2, PC2x and PC2R.It's been thoroughly tested on our house PC2This is our deluxe version, manufactured with a tough ABS plastic enclosure and commercial grade wiring and connectors for years of trouble free performance.We also have a...

reverb.com

(if all else fails.)

Gary

 

[sunspot]

Here's one for sale in stock for ridiculous money.

I`ve already have basically the same thing sitting on my table, proper connector, and all. Question is what wires goes where on the 4-pin connector.

 

[happyrat1]

Why not open up the keyboard and do a little detective work?

Voltages should b e silkscreened on the circuit boards.

Gary

 

[sunspot]

Voltages should b e silkscreened on the circuit boards.

well, except they are not
The whole point is to eliminate the guesswork.

 

[ioannes]

You may try to find them by the schematics
Search "service manual pc2x" by google and you will find them

 

[sunspot]

The service manual is exactly the source of my concerns: pin numbering of the Krycon connector there totally contradicts the numbering scheme of the Krycon ltd. itself. Like according to Krycon pins go clockwise as 3-1-2-4 but Kurzweil lists them as 3-4-1-2

 

[happyrat1]

Did you ever get a response from Kurzweil support?

 

[ioannes]

The service manual is exactly the source of my concerns: pin numbering of the Krycon connector there totally contradicts the numbering scheme of the Krycon ltd. itself. Like according to Krycon pins go clockwise as 3-1-2-4 but Kurzweil lists them as 3-4-1-2

Krycon or Kycon ?
I just find Kycon: https://cloud.kycon.com/website/index.html

Do you know if PM0024-001 (9Vdc - 1,75A) is the same of PM0025-001 ?

 

[ioannes]

The service manual is exactly the source of my concerns: pin numbering of the Krycon connector there totally contradicts the numbering scheme of the Krycon ltd. itself. Like according to Krycon pins go clockwise as 3-1-2-4 but Kurzweil lists them as 3-4-1-2

I think the final part of this post could help: https://gearspace.com/board/connect...25-001-power-supply-replacement-pc2x-etc.html

 

[sunspot]

Yep, definitely Kycon KPPX-4P.
Thanks, have seen that topic.
Firstly that guy has a faulty PSU, secondly and more importantly according to his observation the Kurzweil schematics counts the pins in wrong order (but mysteriously all the other stuff like voltage regulators uses manufacture`s pin assignment) and rotates the voltages on the connector to 180 degrees. So I really need a second opinion from another actual PSU owner.
As for PM0024-001 vs PM0025-001 the label and connector look identical (both dual voltage 9DC and 14AC) so they are probably the same thing. Maybe?

 

[ioannes]

Yep, definitely Kycon KPPX-4P.
Thanks, have seen that topic.
Firstly that guy has a faulty PSU, secondly and more importantly according to his observation the Kurzweil schematics counts the pins in wrong order (but mysteriously all the other stuff like voltage regulators uses manufacture`s pin assignment) and rotates the voltages on the connector to 180 degrees. So I really need a second opinion from another actual PSU owner.
As for PM0024-001 vs PM0025-001 the label and connector look identical (both dual voltage 9DC and 14AC) so they are probably the same thing. Maybe?

I found PM0024 is for 230 Vac, PM0025 for 120 Vac
In Italy we have 230 Vac

I am still investigating about pinout

 

[happyrat1]

You DO realize that the plug is the mirror image of the socket I hope ?

 

[sunspot]

I found PM0024 is for 230 Vac, PM0025 for 120 Vac
In Italy we have 230 Vac

Good catch about the difference between them!

You DO realize that the plug is the mirror image of the socket I hope ?

Well I have a Ph.D. in applied physics
so I`m confident in my skills. May be just a little.