Korg Forums

[juanab]

I need to replace the Internal Power Supply PCB, (part #500002190400) on my old "Korg Kronos X"

The replacing part for this item was part #500002190402. It is no longer available.

In Spain they have told me that the new part number for this item is #500002190403

The complete name and number they gave me for this item was (in Spanish):
FUENTE ENO-1612-K (IMB-140D-K) KORG 500002190403

Does anybody know if this part (#500002190403) would work properly on my old "Korg Kronos X"?

[average_male]

Spain runs on 220V not 110/120V, so you need to account for this. Are you able to locate a specs for the part numbers you listed?

Update 2:
Looked up the part and found this: https://www.audiotestserviciotecnico.com/tienda/500002190403-fuente-eno-1612-k-imb140dk-c-korg/

You just need to confirm input voltage and if you don’t mind spending $200++, then it should be fine.

If you are electronically savvy and want a better power supply, I’d recommend installing a Seasonic PSU. There is a post I made that touches a little on this approach.

Update 3:
Seems it is 120v and be fine for North America. See discussion here that notes the model you referenced:
www.korgforums.com/forum/phpBB2/viewtopic.php?t=124687&view=next&sid=ed5088b6c0bcf053a0b723fd92941aa0

[juanab]

Thank you very much, average male!
I am from Buenos Aires, Argentina and my Kronos runs on 220V.
I'll try to get the ENO-1612-K.
Just in case, what Seasonic PSU model would you recommend?
Thanks again!
Juan

[average_male]

[juanab]

I really appreciate your help. But I'm really not very tech savvy.
So I think I'm gonna proceed with the ENO-1612-K (IMB-140D-K), the installation of which seems easier.
And once again, THANK YOU VERY MUCH!

[BlackForest]

Would you mind posting some wiring diagram for the adaptes, and parts needed?

I also got me a second hand "X" and it has the problem of not being able to reboot when it is warm, it only briefly reacts, blinks and then it's off again.
Also the Kronos "froze" yesterday briefly, the screen, and then switched off. so I hope it is not the PSU, but would like to have the information about the adapter ready.

I will first only add a CPU cooler over the heatsink and the other NK10 chip, which gets so hot, and hope it is not the PSU
_________________
Kronos 2-88 & X73, Kurzweil MicroPiano, Spitfire Albion V Tundra, BBCO Core, Nylon Guitar Ilya Efimov, Xtant Audio Uilleann Pipes - in use

Korg DS-8, Roland D-10, M1Rex, Wavestation, Korg SP-280, JV2080, Wavestate, Kronos LS - all RIP

[average_male]

Hello,

I don't have the part numbers but here is some details to get you started:

IMPORTANT: Always confirm voltages regardless of spec sheets and always double check correct wiring when making such an adapter

1) Pinout for the Kronos Power supply https://www.kronoscopie.fr/fichiers/specs/228_specification.pdf

2) Attached Pinout of the Seasonic power supply I used:

https://live.staticflickr.com/65535/52322639924_037ee6204f_h.jpg
https://live.staticflickr.com/65535/52322656200_2422176ba6_h.jpg

3) I had crafted the custom interface between the two using PSU connectors found on DigiKey or similar, example:

https://www.digikey.com/en/products/detail/molex/0009503141/4119901

https://www.digikey.com/en/products/detail/molex/0026604140/265718

https://www.digikey.com/en/products/detail/jst-sales-america-inc/VHR-4N/608626

And something like this for making new female/male connections:
https://www.digikey.com/en/products/detail/molex/0039000039/61448
https://www.digikey.com/en/products/detail/molex/0039000041/61445

You’ll need to remove the pins from the SeaSonic power supply cable housing and make an interface (requires extra long PCB header pins) for the existing PSU connector on the Kronos and a another 4 pin connector for another board, and I think another connector for the boot support board.

[BlackForest]

[average_male]

[BlackForest]

Well, i have now 2 additional fans: one 60mm on the CPU, and one smaller one on the power supply. The original fan is back at its place. I also stuffed some foam next to this fan to avoid a "short-cut" of the airflow.

With the fan on Auto it stays around 50'C when in normal use (ambient temperature is around 23'). At this device's temperature an immediate reboot is not possible. A few minutes later then yes.
If I leave the Kronos "idling" it goes down to above 40'C.

Is this a normal behavior (Kronos X73) or a possible sign of a dying power supply?
_________________
Kronos 2-88 & X73, Kurzweil MicroPiano, Spitfire Albion V Tundra, BBCO Core, Nylon Guitar Ilya Efimov, Xtant Audio Uilleann Pipes - in use

Korg DS-8, Roland D-10, M1Rex, Wavestation, Korg SP-280, JV2080, Wavestate, Kronos LS - all RIP

[average_male]

Well, given what you stated, it's difficult to make any conclusions as to the root cause and some diagnostics will need to be performed to isolate the issue. What I noted above is something I would do if I was in your situation.

Additional technical details that may assist. If you look at this link on page 28, you get a sense as to where the Intel motherboard has its heat sensor and the usage of "thermal diode" on the CPU.

https://www.intel.com/content/dam/support/us/en/documents/boardsandkits/desktop-boards/NM10/D510MO/D510MO_TechProdSpec02.pdf

My assumption is that this sensor is used to gauge the Kronos' heat readings and if this is the case, then we need to understand what is driving the heat up so high and preventing a reboot? Have you tried factory resetting your Kronos to factor settings? Other than that, opening up the case and performed the test I noted seems needed at this point.

[BlackForest]

I don't have a separate ATX power supply lying around to do this test. I had the Kronos open a couple of days ago and seem to remember that it did run cooler while being open and upside down.
_________________
Kronos 2-88 & X73, Kurzweil MicroPiano, Spitfire Albion V Tundra, BBCO Core, Nylon Guitar Ilya Efimov, Xtant Audio Uilleann Pipes - in use

Korg DS-8, Roland D-10, M1Rex, Wavestation, Korg SP-280, JV2080, Wavestate, Kronos LS - all RIP

[BlackForest]

Don't know if that makes a big difference -but my MB is a different one. I wasn't able to find out the exact type though. It is Intel, in a Kronos X.

It has the RAM lying flat down just like a laptop, not standing upright like in your supplied data sheet.

Can't remember how to upload pictures though...
_________________
Kronos 2-88 & X73, Kurzweil MicroPiano, Spitfire Albion V Tundra, BBCO Core, Nylon Guitar Ilya Efimov, Xtant Audio Uilleann Pipes - in use

Korg DS-8, Roland D-10, M1Rex, Wavestation, Korg SP-280, JV2080, Wavestate, Kronos LS - all RIP

[average_male]

[BlackForest]