Discussion about the Korg PolySix synthesizer

Hello,
After fixing the battry problem there was still no sound so I got 
into complex research.
Thanks to Johannes Hausensteiner who helped me step by step by 
interpreting pictures of my measured signals the problem is located.
With a little bit of shame I admit that the problem was simply..... 
ALL of the keyboard keys are bad, more than 5 kohm when pressing so 
I have to clean them as on old-crows site.
Thanks everyone for the helpfull tips.
Han.

--- In PolySix@yahoogroups.com, "gil_we" <gil_we@y...> wrote:
>
> 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.
> > > > > >
> > > > >
> > > >
> > >
> >
>