Korg Forums Forum Index Korg Forums
A forum for Korg product users and musicians around the world.
Moderated Independently.
Owned by Irish Acts Recording Studio & hosted by KORG USA
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

M50 Capacitor Trouble

 
Post new topic   Reply to topic    Korg Forums Forum Index -> Korg M50
View previous topic :: View next topic  
Author Message
cano19781



Joined: 11 Sep 2014
Posts: 3
Location: Caracas

PostPosted: Thu Sep 11, 2014 9:30 pm    Post subject: M50 Capacitor Trouble Reply with quote

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.
Back to top
View user's profile Send private message
remixcero



Joined: 01 Mar 2010
Posts: 8
Location: Maxico Guadalajara

PostPosted: Mon Oct 20, 2014 3:34 am    Post subject: problem nothing response, the display when its frozen M50 Reply with quote

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)
_________________
Korg Trinity Plus, Korg ESx1,Korg MicroX
Korg M50, Korg M1, Kaosspad 3+
Roland FantomXA, Roland Jv1080,Roland SP808
Roland MKS70 Pg 800,Roland MC909
Yamaha SY77,Yamaha DX7,Kurzweil k2000
Ensoniq Esq1,Acces Snow, E-mu xtreme lead
Back to top
View user's profile Send private message Yahoo Messenger
pablolec



Joined: 19 May 2015
Posts: 1
Location: Argentina

PostPosted: Tue May 19, 2015 6:51 pm    Post subject: Reply with quote

hola, soy de Argentina y tengo el mismo problema, que se cuelga toda funcion en el KORG M50 y tengo que reiniciarlo. Me queda claro que son 2 los capacitores a cambiar, pero en que lugar? me han dicho que en la fuente de alimentacion y otros dentro del teclado. Por favor ayudenme, esto me esta volviendo loco!
Back to top
View user's profile Send private message
yarasa



Joined: 27 Aug 2015
Posts: 1

PostPosted: Thu Aug 27, 2015 10:01 pm    Post subject: Reply with quote

If the capacitors are electrolytic, check if they bulged out. You can desolder it and replace it with the same one; the same value and voltage rating. If the capacitors are surface mounted check the connections of the terminals to the board. The connections may have detached due to some vibrations or mishandling of the unit. To fix this you could reheat the solders and have the solder reflow.
_________________
electronic contract manufacturer
Back to top
View user's profile Send private message
michelkeijzers
Approved Merchant
Approved Merchant


Joined: 08 Feb 2007
Posts: 9002
Location: Netherlands

PostPosted: Fri Sep 09, 2016 10:03 pm    Post subject: Reply with quote

I seem to have the same problem. My 3 scenarios when I switch it on:
- Screen showing 'updating left panel, updating right panel, please switch off synth'
- No buttons and joystick work, but all keys does (so I cannot change from program I-A000)
- Everything works but for some seconds, than the previous scenario shows up

I tried to reconnect most cables but without any improvement.
_________________

Developer of the free PCG file managing application for most Korg workstations: PCG Tools, see http://pcgtools.mkspace.nl
Back to top
View user's profile Send private message Send e-mail Visit poster's website MSN Messenger
viya0414



Joined: 24 Aug 2017
Posts: 1

PostPosted: Thu Aug 24, 2017 3:26 am    Post subject: Reply with quote

If the capacitors are surface mounted check the connections of the terminals to the board.

PCBA Assembly
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    Korg Forums Forum Index -> Korg M50 All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group