KRONOS Fan Information

theo73 · Post by **theo73** » Fri May 11, 2012 10:34 am

Look. My whole point here is just this: There are a myriad of problems with the Kronos. From its initial release. We are yet to hear anything substantial from Korg on anything. New users keep coming to the forum wondering what is going on with their brand new wonderful Kronos.

Korg remains silent and keeps selling these defective units.

Now, we are supposed to tell them to relax, just take it to your nearest service center and all will be fine? Your brand new keyboard? Take it to your nearest Korg certified tech if you get one of the problem units and happen to notice it?

And the fan issue? A problem that has not even been recognized by Korg?

In all fairness it doesn't bother me beyond the point that it should not exist. Nobody hears my fan when I play in a club. But what about the studio guys?

Why are there still units being sold with this problem? That's what disturbs me. Why are end users left to remedying the problem on their own at risk of voiding their warranty? Why no official response from Korg?, with an official remedy, fix, and promise that no more units will be sold as new with this problem.

aribo61 · Post by **aribo61** » Fri May 11, 2012 12:12 pm

please, please please, would you stop this kind of discussion here!

This thread is *only* for technical solutions.
It was explicitly created to get this technical topic separate from all that discussion about "is my fan too loud", "I don't hear my fan", "why doesn't Korg..." etc.
There are other threads to talk about that.

michelkeijzers · Post by **michelkeijzers** » Fri May 11, 2012 1:02 pm

Aribo, you are right ... I will stop the discussion here.

Btw, on the first page is the solution (although with precautions and to be done yourself).

Davidb · Post by **Davidb** » Fri May 11, 2012 2:00 pm

theo73 wrote:Look. My whole point here is just this: There are a myriad of problems with the Kronos. From its initial release. We are yet to hear anything substantial from Korg on anything. New users keep coming to the forum wondering what is going on with their brand new wonderful Kronos.

Korg remains silent and keeps selling these defective units.

Now, we are supposed to tell them to relax, just take it to your nearest service center and all will be fine? Your brand new keyboard? Take it to your nearest Korg certified tech if you get one of the problem units and happen to notice it?

And the fan issue? A problem that has not even been recognized by Korg?

In all fairness it doesn't bother me beyond the point that it should not exist. Nobody hears my fan when I play in a club. But what about the studio guys?

Why are there still units being sold with this problem? That's what disturbs me. Why are end users left to remedying the problem on their own at risk of voiding their warranty? Why no official response from Korg?, with an official remedy, fix, and promise that no more units will be sold as new with this problem.

SynthKeyWizard · Post by **SynthKeyWizard** » Fri May 11, 2012 7:40 pm

In Ukraine, where I live is very hard to find a 60mm fan, I'm not even talking about a quiet fan. But despite this, I found a fan that can satisfy our requirements. This is SUNON HA60251V4 http://www.tme.eu/ru/details/ha60251v4/ ... -000u-999/. It is made in Poland. I'll try to order one. I will describe the results of the installation when I get the fan.

But now I worry about the other question: is there sufficient air flow with this fan?

Fan specifications:

Fan type: DC
Fan dimensions: 60x60x25mm
Bearing type: Vapo
Supply voltage: 12V DC
Fans maximum flow rate: 23.46m3/h
Noise level: 13.8dBA
Rotational rate/speed 2500 (±15%)rpm
Power consumption 700mW
Static pressure 1.02mm H2O
Operating voltage range 4.5 ÷ 13.8V
Weight 41.5g
Rated current 60mA
Current and power consumption tolerance ±15%
Min. insulation resistance 500MΩ
Fan material thermoplastic PBT
Enclosure material thermoplastic PBT
Insulation class E
Operating temperature -10...70°C
Leads 2 300mm leads AWG28
Flammability rating UL94V-0
Fan motor brushless DC motor

olegnakorg · Post by **olegnakorg** » Sun May 13, 2012 2:31 pm

I'm a loyal Korg user. I have been using Korg keyboards from the late 1970's.The Kronos is a great machine. The noise is unacceptable!!!!. Has anyone approached Korg to find out what their response is? I believe it is a design flaw and it should not be up to the end users to carry out surgery on the machine. Korg!!!!!!! where are you and what are you going to do about it?

tiggie_00 · Post by **tiggie_00** » Fri May 25, 2012 12:09 am

I think you could use an 80mm fan easy.. you might need to redrill the mounting holes or attach the fan with some good double sided tape.. The real tacky industrial grade.. I bet even a 90mm fan is possible.. then hook a FANMATE speed controller and lower the fan noise to silent.. I bet it would do the trick..

FANMATE FAN SPEED CONTROLLER

http://www.newegg.com/Product/Product.a ... 6835118217

tiggie_00 · Post by **tiggie_00** » Fri May 25, 2012 12:33 am

Ok here is what I will do to mine.. Hydro Dynamic Bearing with speed controller..

Thermaltake ISGC Fan 8 AF0043 80mm Case Fan

http://www.newegg.com/Product/Product.a ... 6835106160

Uploaded with ImageShack.us

davidnaggar · Post by **davidnaggar** » Wed Jun 06, 2012 10:07 pm

tiggie_00,

Were you able to install an 80mm fan? Did you achieve silence? Near silence?

Thanks,

David

tiggie_00 · Post by **tiggie_00** » Thu Jun 07, 2012 3:30 am

I have not tried this yet but its only 10 extra MM.. Mounting would be a another goal. 70 to 80mm adapter might be the cleanest way to adapt.. It would be Silent .. look at the wire of the fan.. It has a speed controller. You can set the air flow as high or low as you want.. once you start to hear anything? You just back off the knob a tad and your cool.

You know the best way to mod the Kronos would be to put two fans in the bottom.. One exhaust fan and one intake.. one on each side to make constant air flow. Cut a hole like a pc case and put a grill plate on.. It could be done.. To me I look at the Kronos as a old pc that needs a good upgrading.. LOL Like that horrid Compaq pc from 1998

tiggie_00 · Post by **tiggie_00** » Thu Jun 07, 2012 2:52 pm

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Shakil · Post by **Shakil** » Fri Jun 08, 2012 2:45 pm

just don't turn the speed too fast on these.. otherwise your KRONOS will start floating like UFO..

Francois · Post by **Francois** » Sun Jun 10, 2012 7:50 pm

Replaced the fan of two Kronos, mine and that of a friend. Would recommend the Noise Blocker XR2 heartily. Added anti-vibration pins and silicon gasket. Easy fix and very low noise level (you really have to get close to the Kronos. And even so, it remains very faint). Perfect !

XR2 with rubber mounts and silicon gasket

View from thetop together with the 256 Gb Samsung

davidnaggar · Post by **davidnaggar** » Tue Jun 12, 2012 4:27 pm

Francois,

Good work! Adding the gasket and the anti-vibration pins seems to have gotten you the best results so far.

Is the fan inaudible to you from a regular playing position?

What brand of pins/gasket did you use? Do you have an image of the gasket before being placed?

Thanks.

David

roblof · Post by **roblof** » Wed Jun 20, 2012 6:34 pm

Just for the curious ones.

The fan speed is controlled by the bios and when it's booted Linux will monitor the fan.

In bios the fan speed is set to 50%.

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