Korg Forums

average_male · Senior Member Joined: 07 Feb 2011 Posts: 278

Ok, and I think you already confirmed this, but looking the ATX connectors, all of the pins are properly seated such that they are visible and flush and they don't get pushed in when slight pressure is applied to them, right? All pins should be visible and flush as in this picture (none should be like the 3rd one on the bottom as noted in this picture):

https://i.ytimg.com/vi/Sm2Nsz-xJ7o/maxresdefault.jpg

BlackForest · Posted: Sat Nov 18, 2023 7:17 pm Post subject:

OK, I'll try to explain once more : I am not using the pins as such. I took these ones out, soldered the cables from the new PSU (I cut off their pins) on them, and pushed them back into this sleeve. So there is no issue of properly seating anything. I did check these soldering for proper conductance.
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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 · Senior Member Joined: 07 Feb 2011 Posts: 278

BlackForest · Posted: Sat Nov 18, 2023 8:07 pm Post subject:

No probs averagemale... I appreciate all the help. And yes, it is difficult to explain what has been done and what not.
I don't have any other MB to test.
So for now, hm, I might be putting it back together and let it run for quite some time to see if the sounds - for some reason - stopped cutting out, and if the Kronos can be restarted immediately, repeatedly. These were the issues why I wanted to swap it initially.
_________________
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 · Senior Member Joined: 07 Feb 2011 Posts: 278

Cool, I admire your determination and braveness to attempt this PSU upgrade. And the work you are doing will help others planning/needing to upgrade their PSU as I would imagine Korg (and its supplier) may not be producing the stock PSU in the near future and any failing PSUs would need replacing. Will keep an eye out for any updates/progress. Thanks.

KK · Platinum Member Joined: 13 Oct 2016 Posts: 1422

You could also test your new PS by itself to see its behaviour. There might have been some mistake connecting it or as previously mentioned there could have been some overload created as the original PS has stronger specs for the -12 V, etc. If the new PS behaves normally with minimal load, that could explain the issue. Following the same example, I would then personally measure the current drawn for the -12 V with your original PS to confirm, etc. Of course, no need to do anything of this if your Kronos now works fine.

BlackForest · Posted: Sun Nov 19, 2023 7:11 pm Post subject:

The Kronos has been running now for 2h with the old PSU OK.

Now while the sound cutting off happened very unregularly and so I can't confirm this yet, what on the other hand is new: I can restart it again straight after switching it off, no matter how long it ran! So an improvement even though I didn't really change anything..
Only what's popping up now is a low Bios battery...
_________________
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 · Senior Member Joined: 07 Feb 2011 Posts: 278

Given this new behavior, original issue may have been a loose connection of some sort, right? But glad to hear things appear to be working better now.