The Flanger board (KLM-291) is also the mixer board, in case it got
defective it makes sense to me that the synth problem may be related
to a defect on that board as well.
Do you get that problem only, but only for the synth sound ?
Does it sound distorted on both VCOs ? You can eliminte VCO1 and only
listen to VCO2 and vice versa ?
--- In PolySix@yahoogroups.com, "stagerhodes" <stagerhodes@...> wrote:
>
> 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
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
>Message
Re: Trident question
2006-02-03 by gil_we