Discussion about the Korg PolySix synthesizer

thank you !...well, the controls are working, only it makes a kind of 
distortion which is more audible in the 16' and 8' octaves, it 
reduces it in the 4' ( a distortion with some kind of modulation ), 
the bad effect will be more noticed too if one set the EG Intensity 
to center or full counterclockwise (negative envelope). I tried to 
memorize 2 patches and the programmer seems ok, the patches are 
there, so i just don't know what to do next...
I must say that it seems the top panel was (may be the unit crashed 
in the floor or something) bend in the master tune pot area, after a 
close look i saw one of the screws fixing the Flanger board , in its 
place with a small PCB fragment attached, and the board broke in one 
of its edges (screw area). I took out the flanger board and it seems 
no damage in any of the pcb traces...anyway does any malfunction in 
this board reflects in the synth section sound (with flanger turned 
off) ??
Oh, the preset sounds are not ok, just a short beep (low frequency), 
the strings and brass are OK
regards
Art 


--- In PolySix@yahoogroups.com, Johannes Hausensteiner <johau@...> 
wrote:
>
> The PCB looks OK; no damage due to leaked battery as in the Polysix
> is visible.  According to the pics (silkscreen) the battery which is
> mounted seems to be original or genuine replacement.  So I wuuld not
> suspect a threat like in the P6.  It largely depends on the battery
> make, which seems to be good quality in this unit. So as long as the
> battery retains sufficient voltage (more than 2.5V) I would not
> worry about it.
> This does not surprise me, since the Trident MK I programmer and the
> MK II programmer are completely different. MK I was designed before
> Polysix, MK II afterwards or the same time obviously useing the same
> technique in both (edit mode, etc). Amazingly they did not use a
> microprocessor for the patch manager in the MK I but an all-hardware
> type of design.
> 
> Regarding your original problem: it may be (even likely) that the
> battery is dead or at least discharged and all memory patches are 
gone
> producing no or meaningless sound. Are the knobs and switches 
working
> in "Manual" mode? How do the presets ("Piano 1", "Piano 2", "Clav")
> sound?
> 
> According to the schematics there are on KLM-317 three sets of pots
> for the presets; you may set your favourite sound patches there.
> (The Yamaha CS-60 and CS-80 had a similar kind of "Patch Memory"..)
> 
> Johannes
> 
> 
> stagerhodes wrote:
> > Hi,
> > just uploaded 8 photos of the board, hope they're ok now for you 
to 
> > try to help me.
> > regards,
> > Art
> >
> > 
> > --- In PolySix@yahoogroups.com, "gil_we" <gil_we@> wrote:
> > 
> >>you're welcome,
> >>
> >>I'm interested to see how corroded is the board - if any at all.
> >>
> >>
> >>--- In PolySix@yahoogroups.com, "stagerhodes" <stagerhodes@y...> 
wrote:
> >>
> >>>Hi Gil,
> >>>well, i'm not at home right now, but the battery is from Sanyo, 
and 
> >>>the big lettering is CADNICA (nickel cadmium).
> >>>I will take better pictures tonight and post them (deleting the 
ones 
> >>>there now)...well, what can i say besides thank you for your 
> >>>support ...
> >>>
> >>>
> >>>--- In PolySix@yahoogroups.com, "gil_we" <gil_we@y...> wrote:
> >>>
> >>>>It's very hard to see anything on those pictures... I do see 
though 
> >>>>that the battery was already replaced ?? looks like a lithium 
battery 
> >>>>what does it say on it ?
> >>>>
> >>>>Try to provide close up high resolution pictures of the 
programmer
> >>>>
> >>>>
> >>>>--- In PolySix@yahoogroups.com, "stagerhodes" 
<stagerhodes@y...> wrote:
> >>>>
> >>>>>I think i have another problem here, not related with battery 
leak, 
> >>>>>i just uploaded some photos , not very good quality, but the 
battery 
> >>>>>seems to be sealed, and the programmer is working despite some 
press 
> >>>>>memory recall buttons need cleaning or replacing. Well , the 
synth 
> >>>>>sound has some distortion and sounds like ring modulation, 
this is 
> >>>>>minimized if the negative/positive VCF EG Intensity is full 
> >>>>>clockwise. The preset sounds are like no envelope sustain, 
just a 
> >>>>>short low (frequency) click...well, i'm not a keyboard 
technician,
> >>>>>just trying to make something here, otherwise i will have to 
take
> >>>>>the synth and schematics to a friend who is a technician 
(works in 
> >>>>>musical instruments, not vintage ones but...) and try to put 
this 
> >>>>>synth to play...have to say the brass and strings sections are 
ok,  
> >>>>>the split keyboard function switches and behavior are ok, bend 
and 
> >>>>>mod ok...well...lets see
> >>>>>
> >>>>> 
> >>>>>--- In PolySix@yahoogroups.com, "gil_we" <gil_we@y...> wrote: 
> >>>>>
> >>>>>>Thanks, 
> >>>>>> 
> >>>>>>I believe that this type of info should be shared all over 
the net.  
> >>>>>>The Trident's schematics are very rare - took me weeks to get 
them; 
> >>>>>>however, here they are. 
> >>>>>> 
> >>>>>>I got my Trident in disasterous condition, nothing worked, 
battery  
> >>>>>>corrosion, bad chips, everything you may think of... Got it 
work  
> >>>>>>finally after doing the refurbishment step by step. This is 
an  
> >>>>>>incredible machine, one of the best ever made and definately 
Korg's  
> >>>>>>best Polysynth. 
> >>>>>> 
> >>>>>>Let us know how you proceed, also if you can take some 
pictues of the  
> >>>>>>board it would help.
> >>>>>> 
> >>>>>> 
> >>>>>>--- In PolySix@yahoogroups.com, "stagerhodes" 
<stagerhodes@y...> wrote:
> >>>>>>
> >>>>>>> Oh, i'm very pleased regarding this group , many thanks for 
your 
> >>>>>>> reply and the schematics beeing available for download... i 
will 
> >>>>>>> unmount the Trident may be tonight or tomorrow night and 
will post my 
> >>>>>>> sights inside. This is one of my favorite (regarding it's 
wood design 
> >>>>>>> and the sound, particularly the synth section) keyboards 
from korg , 
> >>>>>>> and i can say i tried almost them all at the time they were 
beeing 
> >>>>>>> produced since i was working demoing them in a shop. So now 
is the 
> >>>>>>> time for me to have some of them in full working 
condiction...
> >>>>>>> Art
> >>>>>>> 
> >>>>>>> 
> >>>>>>> --- In PolySix@yahoogroups.com, "gil_we" <gil_we@y...> 
wrote:
> >>>>>>>
> >>>>>>>> I didn't fully understand how the synth section acts on 
this machine...
> >>>>>>>> Also, is there corrosion (green colored) on the battery 
and near it ?
> >>>>>>>> Are there bad (black colored)traces ? are the signal and 
synth boards 
> >>>>>>>> correded as well on some areas ?
> >>>>>>>> 
> >>>>>>>> Take extra care not to hurt anyting that works. 
Particually, stay 
> >>>>>>>> away from the 10 leg transistor type component at the 
bottom left 
> >>>>>>>> side of right bottom (signal) board. This one is extremely 
sensitive 
> >>>>>>>> to extreme temperature changes and is very rare and 
expensive to get.
> >>>>>>>> 
> >>>>>>>> You can use the schematics I uploaded to the Files section.
> >>>>>>>> 
> >>>>>>>> 
> >>>>>>>> --- In PolySix@yahoogroups.com, "stagerhodes" 
<stagerhodes@y...> wrote:
> >>>>>>>>
> >>>>>>>>> Hi,
> >>>>>>>>> i just bought a Trident MK I in which the poly synth 
section is 
> >>>>>>>>> malfunctioning, i am almost certain that the problem is 
the battery 
> >>>>>>>>> question , and the leakage from it. It seems the tune is 
ok, all notes 
> >>>>>>>>> are sounding (brass and strings sections), in the synth 
section one can 
> >>>>>>>>> ear some sound (it is possible to ear the notes pitch, 
but with some 
> >>>>>>>>> strange effects in them) and the memory section is not 
working which 
> >>>>>>>>> leads me to the battery question. Is there any special 
care i must have 
> >>>>>>>>> in this model ?
> >>>>>>>>> regards
> >>>>>>>>> Art
> >>>>>>>>> Portugal
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> >>>>>>>
> >>>>>>
> >>>>> 
> >>>> 
> >>> 
> >> 
> > 
> > 
> > PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6 
> > Yahoo! Groups Links
> > 
> > 
> > 
> >  
> > 
> > 
> > 
> >
>