Also, can you see any broken or "cold" solder joint on this board ?
--- In PolySix@yahoogroups.com, "gil_we" <gil_we@...> wrote:
>
> 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