Korg Forums

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

Just realized my old Kronos had the same motherboard as yours with the laptop RAM slots, it is the Intel D525MW

https://www.intel.com/content/www/us/en/products/sku/48952/intel-desktop-board-d525mw/specifications.html

BlackForest · Posted: Wed Sep 07, 2022 4:17 am Post subject:

jantoman · Joined: 13 Jul 2011 Posts: 12

@average_male: thanks a lot for your extra-useful informations! A friend asked my help for a similar issue and tomorrow I'll try to check if his PS needs to be replaced or not (BTW I have a 1st-gen 61 Kronos as well).
Did you look at the ENO-1612-K capacitors when you took it off? I was wondering about recapping it to see what happens... It's not my usual approach on any other gear, but over the years I found out that power supplies are so prone to capacitors' failures that I never think about it, I just replace them at once Wink

BlackForest · Posted: Fri Jul 07, 2023 9:58 am Post subject:

So, I might be going to swap the power supply after all..

My Kronos X keeps cutting off sounds, mainly the SXG piano sounds it seems (while sound from other engines continue),
as well as the SSD light then keep blinking and the CPU is super busy (no reaction to buttons or touching the display, to then suddenly catch up with all inputs I did).
I swapped the SSD recently, but this didn't help anything. A disk check showed no errors. An I still have the issue that one can't restart the synth once it's warm.

I found the following PSU but am not sure if the amps of the -12V supply is suffient (it supplies 0,3A while the original ENO-1612 delivers 0,5A).

Will this differnce become an issue, what do you guys reckon? AFAK -12V are used for serial ports only, but also possibly the A/D converters?

https://www.bicker.de/en/beh-531h_industrial_pc_power_supply_1u_300w_90-264v_flex-atx_ac-dc_62368-1

Maybe someone in Europe knows another replacement eben cheaper (wanting to avoid tax and customs with US imports)?

Am not sure if I will replace the complete wiring harness of the Kronos, or if I re-plug the exisitig harness (take all the pins out and insert them into the new Molex plug). I will not do the adapters as written above as this is too complicated for my brain...a
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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

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

How old and full is your SSD ? This because if you go on the Nautilus forum, you will see many have a similar problem and Korg apparently suggests to change the SSD (because the original SSD they install at factory doesn't have a very good performance and is already quite full). Disregard this though if you already changed the stock small SSD on your Kronos for a larger sized one.

BlackForest · Posted: Fri Jul 07, 2023 2:00 pm Post subject:

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

Hi BlackForest,

Next time you experience the problem go in Global Mode and select the Fan setting option in the upper right menu, then check the temperature shown. Maybe your fan doesn't cool your Kronos enough and the SSD freezes to protect itself if its internal heat protection kicks in. IIRC the earlier versions of Kronos had an off option for the fan, make sure it is not set to off. I could be totally wrong, but just in case.

voip · Platinum Member Joined: 27 Nov 2014 Posts: 3776

The temperature sensor is located on the CPU die itself. It doesn't measure the temperature of the SSD.

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cjfox · Joined: 08 Oct 2012 Posts: 38

My original Kronos 61 had the same symptoms, piano not working, SSD LED on continously, unresponsive after an hour or 2. No overheating though, below 50C at the time. This was after replacing both the motherboard and the power supply. I put a new 64gig SSD and did a full re-install from DVD, which cured the problem. This was after a long and previously documented journey of repair, which involved putting in more fans, changing a BIOS setting in the new MB, and squeezing in a replacement power supply that was a generic ATX of the same dimensions. Unfortunately, I know you can't do a re-install on an SSD as big as yours from DVD, so perhaps an error is being copied in the cloning process.

BlackForest · Posted: Fri Jul 07, 2023 9:00 pm Post subject:

Hm, alright that's a "sad" story of yours, replacing expensive hardware to no avail.
So, if I indeed opted to reinstall, I then would have to reinstall the original SSD first since the larger new SSD would not be recognized by the DVDs, correct?
_________________
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

cjfox · Joined: 08 Oct 2012 Posts: 38

I can't remember what the limit is, a 64 gig will work and are somewhat cheap these days.

BlackForest · Posted: Sun Jul 09, 2023 7:27 pm Post subject:

So, duh, I tried to reinstall the OS. At first I tried with the currently mounted 250 GB SSD - and it started up to formatting but then got stuck. So, Ok, I got it and I put the old original SSD in. But now the DVD drive is not recognized anymore. It shows an system failure error and says to unplug usb devices. Doing that, it continues to boot alright.

But as said, the previously recognized drive is now not being recognized anymore.
I wonder if it has to do with not putting all the screws of the bottom cover back in ? I can't imagine it, but also, am just tired this evening to continue...
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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

BlackForest · Posted: Mon Jul 10, 2023 3:01 pm Post subject:

Tadaa! Step one successful! Quick prayer, I opened this old DVD drive (DVDRW16x2U) , it's from Iomega. What did I find? A good old IDE connection and a jumper set to Slave..So, replug it to Master , and, voila, it"s working!!
Maybe something for some other drives to consider?
_________________
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

projectaspen · Joined: 05 Sep 2019 Posts: 7

Hi,

could you give more details on how you connected a Seasonic PSU to the Kronos? How did you make the adapter?