Korg Forums

Hi

my keyboard just started to fail. Not touch, not lights, not respond. I can see that is a ancient problem, is there any solution?

Thanks

Power supply?

M50 is a wall wart PS, no? Same as used as far back as KARMA. Those can fail fairly regularly - there is a short warning time as they begin to fail, then nothing.

Check on-line availability - it doesn't have to be Korg, but it must have the same connector and power rating in milliamps. The correct power rating should be printed on your current power supply; use that as your guide.



BB

sorry, i mean, yes turn on, but last 3 minutes and then freezing, the display, touch, nothing respond until turn off and again turn on. seems to be a generalized problem. i heard some capacitor problem but nothing definitive.

Had forgotten that issue, but yes, there should be a large archived discussion here on m-50's capacitor problem including an identification (part number/location) and fix for the problem.

You may want to call your local Korg repair shop and ask about this.

Since it is a known issue, their analysis and fix should be a well defined and straight forward repair. It may (I'm guessing here) even be covered, if only for the part, because it is a known defect.

Good luck.


BB

thanks for your information. Also i have searched for a solution in the forum without luck, but i 'll try again. Thanks again.

Check this discussion, towards the end. Sounds like the same issue:

http://www.karma-lab.com/forum/showthread.php?t=18473

I'm from Venezula, and We don't have any korg services here, by the way, my Korg M50 doesn't work very well, you know a very famous capacitor trouble, I have a very good friend of mine, and he is an electronical engeneer, I would like to know which specific capacitor we need to replace because we try to fix my keyboard, please somebody help us.

chechk this

the problem begin when
can't comunicate with host CPU correctly. this the direct cause of these problem. this would happen when the power regulators output has large ripple voltaje, at 1.8v power regulator on KLM 2887. this ripple voltaje could be large because ot the parts tolerance of this power regulator circuit.
this system version controls drive power down at CPU ports, it makes total power consumption of CPU down. as the result these problems should be fixed in most cases according to our test.

however, rarely, when ripple voltage is very large because of range of parts tolerance in this regulator circuit, v 1.0.5 or later, cant solve the problem, in this case, it requires to remplace the capacitor C153, C37 (tantal capacitor)


Spanish
el problema comienza cuando
no se puede comunicar con la CPU del host correctamente. esta la causa directa de estos problemas. esto iba a pasar cuando la salida de los reguladores de energía tiene gran Voltaje ondulación, en el regulador de energía 1.8v con KLM 2887. esta Voltaje de rizado puede ser grande porque ot la tolerancia partes de este circuito regulador de potencia.
este sistema de control de versión en coche apagado en los puertos de la CPU, que hace que el consumo total de energía de la CPU hacia abajo. como resultado de estos problemas deben fijarse en la mayoría de los casos de acuerdo a nuestra prueba.

Sin embargo, rara vez, cuando el voltaje de ondulación es muy grande debido a la gama de tolerancia partes en este circuito regulador, v 1.0.5 o posterior, no puedo resolver el problema, en este caso, que se requiere para REMPLACE el condensador C153, C37 (condensador de tantalio)



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