Analogue-sequencer

Hi Collin;

This is what my tech told me while testing the unit,

The sequencer seems to work fine until  you put the litium battery ( +VB in 
the schemes) to memory storage. Then the displays shows strange,cloudy.The 
leds turns on randomly and it sends midi messages without any order or 
logic.

He says that some kind of parasite signal interfers with the machine.He says 
again that it seems to work properly again only  while the RUN key is  
pressed
 
He tested it without the battery, and having short circuited the C12 
capacitor, the machine works fine again, his suspects are than the DS1210  
doesn´t work properly, he reports that that piece is connected
to the feed of the memory chips and a decoder/ multiplextor.

I haven´t seen myself the P3 , so I can´t tell you and I don´t know a thing 
about electronics so please help us.

Thanks;

Hans

p.p.d.d.  sorry about the innacurate translaltion,sorry
 
Ua vez retirada la pila y habiendo cortocircuitado el condensador C12  el 
aparato se estabiliza. Mi sospecha es que el DS1210 no funciona bien, pero 
ese condensador según veo en el esquema está conectado a la alimentación de 
los chips de memoria y a un decoder/multiplexor
que supongo que tiene que ver algo con la gestion y seleccion de los chips 
de memoria.
 

 

_________________________________________________________________
Descarga gratis la Barra de Herramientas de MSN 
http://www.msn.es/usuario/busqueda/barra?XAPID=2031&DI=1055&SU=http%3A//www.hotmail.com&HL=LINKTAG1OPENINGTEXT_MSNBH