Discussion about the Korg PolySix synthesizer

The 4xxx are very cheap to get, I'd personally replace any suspective 
one, be careful with the unsoldering process


--- In PolySix@yahoogroups.com, "Gregor Quade" <u3dreal@y...> wrote:
>
> I found out the 4556D on the panel board (369) is an oamp for the
> volume..Gil said those get down often..so check this one..
> 
> Hope it might help.
> 
> Gregor
> >
> > I think the service manual have this information...
> > 
> > --- In PolySix@yahoogroups.com, "hansomchaam" <hansomchaam@y...> 
> > wrote:
> > >
> > > Thanks for reply, I fixed the battery problem as described.
> > > I checked (again) all connections/signals with an oscilloscoop.
> > > I don't see any output, also no gate signals when key-stroke on 
ic5 
> > > KLM-366. 
> > > What shape must be on TP2 KLM367?
> > > Thanks for your help.
> > > Han
> > > --- In PolySix@yahoogroups.com, "gil_we" <gil_we@y...> wrote:
> > > >
> > > > How are the main voltages ? Has the battery leaked ?
> > > > 
> > > > 
> > > > --- In PolySix@yahoogroups.com, "hansomchaam" 
<hansomchaam@y...> 
> > > > wrote:
> > > > >
> > > > > Hello,
> > > > > Again here is a polysix with the "no sound at all" problem.
> > > > > When I measure with oscilloscoop on KLM366 (new) ic 9 pin 1 
> > > there 
> > > > is a 
> > > > > constant pattern but not a 0.5 V/oct. Keystrokes has no 
effect 
> > > at 
> > > > all, 
> > > > > processor 8049 gives signals on DB0..DB8. Also no output on 
> > gate 
> > > > 0...3 
> > > > > = pin 15,10,7,2 ic 5 on keystroke.
> > > > > Does anyone has suggestions.
> > > > > Please help me, I look forward to hear the nice sound again.
> > > > > Thans,
> > > > > Han.
> > > > >
> > > >
> > >
> >
>