Hi , i answered your message but it seems it never came to the group,
i dont know why. This week has been and it will be a very busy one
for me, so i have no time to mess arount the Trident. Next week i
will be back to it and will probably need more help from you
guys...is there any tests i can make to try the several modules (i
already have the tips from Johannes regarding the VCO 2 #6 voice
problem), but, since i suspect the VCF problem (some times the unit
plays without distortion but when this happens the VCF controls just
don't work) well, probably has to do with the programmer i don't
know, so, if i have some test procedures i can do it myself or pass
them to my friend who is a technician.
regards,
Art
--- In PolySix@yahoogroups.com, "gil_we" <gil_we@...> wrote:
>
> DO NOT TOUCH IC12 !
>
> If you're not looking for any further trouble... Johannes and me
were
> just trying to solve a problem on my Trident on which that
particular
> component was responsible... a 40-70$ priced unit and very hard to
> get. It is responsible for the overall scaling and tuning of the
> instrument. It is supposed to get hot indeed and has a built
> in "oven" which keeps it in a particular, stable temperature. My
> problem started when I tried to use a freezing spray to trying to
> find the cause for another problem, and unfortunately sprayed some
> onver it as well.... so stay away from it ;)
>
>
> --- In PolySix@yahoogroups.com, "stagerhodes" <stagerhodes@> wrote:
> >
> > Good tips which i will try for sure. I noticed the IC12 (10 leg
> > transistor type) in the signal board , will heat very quickly, is
> > this normal ? Since the Trident MK II has the outside dissipator
> > does the MK I need some extra thing to keep temperature
> controlled ?
> > The power supply triacs are heating as hell too...
> > oh, by the way...when for seconds the distortion is gone i have a
> > clue on how good this thing sounds...humm...great ! I can't wait
to
> > have this beast in good shape..thanks!!!
> >
> > Johannes, the preset piano 1 started ok without deep changes in
the
> > trim pots, it seems it was when i pressed the phillips screw
driver
> > in order to turn the pot it started ok, but, after the distortion
> > came back i could't reproduce it again same way...
> >
> >
> > --- In PolySix@yahoogroups.com, Johannes Hausensteiner <johau@>
> > wrote:
> > >
> > > Hi,
> > >
> > > So the preset thing is clear; probably a "genius" cranked the
> > trimpots
> > > and made the sounds unusable.
> > >
> > > For the distortion: try to find out on what this depends. I
would
> > start
> > > with a simple setting (e.g.only VCO-1, filter all open, "gate"
> EG,
> > etc.)
> > > Then play around with single parameters and notice under when
the
> > > distortion/modulation starts. Maybe you can find out this way
> > where
> > > is comes from.
> > > Further check whether it is on all 8 voices. If yes, then
> probably
> > the
> > > reason is in a common part (e.g. overall synth gain
circuit, ...)
> > >
> > > Voice #6: check IC9 of unit #6. On pin1 there should be the VCO-
2
> > > waveform regardless of On/Off setting on the control panel.
> > IC9/pin13
> > > is the control signal, it should be high when VCO-2 is on, low
> > when
> > > off. IC9/pin2 is the switched VCO-2 wave.
> > >
> > > Good luck!
> > >
> > > Johannes
> > >
> > >
> > >
> > > stagerhodes wrote:
> > > > ok...i think i made some progress here...when trying to
adjust
> > VR27
> > > > in the presets board (with piano 1 , as Johannes told)
suddenly
> > i
> > > > heard the sound loud and clean...after a bit the distortion
> came
> > > > again...well, in this process when it sounded ok i changed
> from
> > > > piano 1 to manual and the synth was there without
> > > > distortion...but...no VCF working (just the FINE Cutoff was
> > > > working)...so i believe my problem is related with the
> > filter...i
> > > > will do more testing here, in the mean time if someone can
give
> > some
> > > > clues based on this it would be great..thanks to all !
> > > > Oh..almost forgot...i found the VCO 2 not working in the
voice
> > #6.
> > > >
> > > >
> > > > --- In PolySix@yahoogroups.com, "gil_we" <gil_we@> wrote:
> > > >
> > > >>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
> > would 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 using
> > 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
> > > >>>>>>
> > > >>>>>>
> > > >>>>>
> > > >>>>
> > > >>>
> > > >>
> > > >
> > > >
> > > > PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> >
>