Discussion about the Korg PolySix synthesizer

Hi all,

Tested the CPU on TP4 get pulse of 10ms width..??
I also tested the signals on TP2 / TP3(GND) and i get corresponding
changes for all the knobs except MG delay / level
and all the EG knobs....

does this mean my processor is damaged??

I really would appreciate some help

thanks 

Gregor  
>
> Hm I cleaned up all the trimpots....
> 
> I rather would like to know which IC could be wrong
> 
> thanks a lot for reply....
> 
> Gregor
> 
> > Are you refering to the trimpot on the computer board ?
> > 
> > I don't know very much about it but on my Trident it did the 
same 
> > when I set it to a cetrain position. This is how it was when I 
first 
> > got it - powered it up and all banks/presets lite up. By 
ritating the 
> > trimmer a bit it booted up correctly finally (bank 1 / preset 1)
> > 
> > 
> > --- In PolySix@yahoogroups.com, "u3dreal" <u3dreal@y...> wrote:
> > >
> > > Hello all;
> > > 
> > > I bought a polysix in rather bad condition...
> > > 
> > > I did the batteryreplacements and checked to circuits...they 
seem to
> > > be OK for both sides of teh PCB 
> > > ...many things were still wrong then I replaced the IC31...and 
the 
> > octave 
> > > knob and the sub osc were working again.
> > > 
> > > The Controls are better now but still don't work correctly..
> > > 
> > > the MG....Delay doesn't work at all and Level gets controlled 
by the
> > > VCO PW/PWM knob...? the EG doesn't seem to work either..
> > > only the sustain can be controlled via the LFO resonance knob..
> > > 
> > > all the other things like the preset section / loading saving 
> > progamms
> > > or even sending and receiving banks form external casset 
recorder
> > > works....!!!!!
> > > 
> > > when i try to do the testing procedure with the 56k 
resistor...the 
> > > following happens.....when i turn the trim clockwise there is 
a 
> > point 
> > > where is jumps from bankA prog1 to all eight 
proglights.....this 
> > doesn't 
> > > happen 
> > > for me the two first ( prog 1+2) don' light...sometimes 
> > > its only the first one which doesn't light...
> > > when i remove the resistor it switches back to prog1 bankA
> > > 
> > > I have no idea what could be wrong...could it be IC30 or even 
the 
> > > processor ?? Did you have something simlar ? 
> > > 
> > > How much would a new proc cost?
> > > 
> > > I really would aprichiate it a lot if you could give me some 
> > advice...
> > > 
> > > 
> > > thanks in advance
> > > 
> > > Gregor
> > >
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6 
> > Yahoo! Groups Links
> > 
> > 
> > 
> >  
> > 
> > 
> 
> 
> 
> 	
> 
> 	
> 		
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