I'm pretty embarassed right now, I just figured out why this was
happening, and it's solved. After reading through the midijack manual
I came across a note that read "Since you are using the V-trigger
output from the MIDIJACK, set the TRIG POLARITY slide switch to
+15V" --- and sure enough, this must have happened between the time I
took this apart and resoldered that wire and put it back together,
the switch had been knocked to GND. It HAD been set correctly, and it
didn't occcur to me at all that it could have been moved.
I'm really happy now, yet still embarassed about missing that, just
moving one switch. Well, granted, it was another thing too with the
wire, but this latter error was all due my blindness. Fixed in time
for tonight's show.
Thanks again Florian and Alan for your input. If you hadn't have
mentioned the gate voltage, I wouldn't have investigated further and
come across
the switch in the first place!
Rich
--- In
korg_mono-poly@ yahoogroups. com, Florian Anwander
<fanwander@. ..> wrote:
>
> Hi,
>
> I assume your MIDI-Extension is a MIDI to CV/Gate Interface.
> What voltage does a voltmeter read at the gate-output of this
interface?
> If this voltage behaves also inverted, then it is perhaps an
failure or
> misconfiguration of this interface.
>
> Florian
>
> hoggybogger schrieb:
> > Yes, there was only one wire that was suspect, and I just double
> > checked the wiring via the midijack installation page.
> >
> > The only other things I had done, were reseat the connectors on
the
> > board with the VCA and VCF on it, and the connectors on the board
> > with the volume pot. I just
checked them again, everything is
seated
> > fine.
> >
> > It is only making sound on the release of the key, not the
initial
> > press. And the VCA controls seem wrong, they're working but in a
> > strange way it seems. I'm very confused by this.
> >
> >
> > --- In
korg_mono-poly@ yahoogroups. com, Alan Dicker <alanmdicker@ >
> > wrote:
> >> Did you re-wire the midi jack correctly? have you the original
> >> installation instructions to hand?
> >>
> >> --- On Wed, 11/2/09, hoggybogger <hoggybogger@ > wrote:
> >>
> >> From: hoggybogger <hoggybogger@ >
> >> Subject: [korg_mono-poly] Re: No sound output from main out or
from
> > headphone out! FIXED!
>
>> To:
korg_mono-poly@ yahoogroups. com> >> Date: Wednesday, 11 February, 2009, 4:23 AM
> >>
> >>
> >>
> >>
> >>
> >>
> >> It's from the internal keyboard, nothing external plugged in. So
> >> frustrating.
> >>
> >> --- In korg_mono-poly@ yahoogroups. com, Chase Smith
<plus_321@ .>
> >> wrote:
> >>> From the internal keyboard or an external keyboard (CV/MIDI).
> >>>
> >>> If it is from an external keyboard, then check the s-trig
switch
> > to
> >> make sure it is set on v-trig. It sounds like it is getting a
> >> constant gate so it has something to do with the s-trig/v-trig
> >> conversion.
> >>>
Chase
> >>>
> >>> --- On Tue, 2/10/09, hoggybogger <hoggybogger@ ...> wrote:
> >>> From: hoggybogger <hoggybogger@ ...>
> >>> Subject: [korg_mono-poly] Re: No sound output from main out or
> > from
> >> headphone out! FIXED!
> >>> To: korg_mono-poly@ yahoogroups. com
> >>> Date: Tuesday, February 10, 2009, 9:20 PM
> >>>
> >>> Ok, I spoke too soon. It works, but not correctly now -
something
> >> is
> >>> wrong with the VCA EG or something else, when I press a key I
> > only
> >>> get a sound when I let go of the key, not when I press it down.
> >>>
> >>> Turning the ADSR to 0 on the VCA EG then playing a key only
gives
> > a
> >>> sound when I let go of the key. When I turn the
attack to 2 and
> >> press
> >>> a key, it still only plays when I let go but fades in and cuts
> > out.
> >>> If I turn the sustain knob up, the note rings on endlessly, the
> >>> release knob doesn't appear to change anything.
> >>>
> >>> Basically, I'm only getting sound when I let go of a key, what
is
> >>> that a sign of? Just when I thought I was in the clear!
> >>>
> >>>
> >>>
> >>> --- In korg_mono-poly@ yahoogroups. com, "hoggybogger"
> >>> <hoggybogger@ > wrote:
> >>>> It works now! Here's what happened tonight, I changed the
> > volume
> >>> pot
> >>>> to a new one (I had ordered a replacement a few years ago,
> > never
> >>> got
> >>>>
around to installing it) and it didn't fix the problem.
> >>>>
> >>>> Then it occurred to me after messing with this for a bit, that
> > it
> >>>> might be the MIDIJACK I installed on this last year - sure
> >> enough,
> >>>> one of the wires had come disconnected. Reconnecting it solved
> >>>> everything!
> >>>>
> >>>> So there was nothing wrong with my Mono/Poly, only the wiring
> > for
> >>>> MIDIJACK kit I had put in. This whole ordeal at the very least
> >> got
> >>> me
> >>>> to change the potentiometer, and learn a bit of
> > troubleshooting.
> >>>> Thanks for your help Florian, I appreciate it.
> >>>>
> >>>> I also decided to purchase the Korg Legacy 2007
collection,
> > since
> >> I
> >>>> don't own any official emulation synths. It will be nice to
> > have
> >> a
> >>>> backup if one of these go down again. It just kind of makes
> > sense
> >>> to
> >>>> perform with a controller and laptop, this synth belongs in
the
> >>>> studio, less gigging with it means less repairs. I just hope
> > the
> >>>> software version sounds pretty good, I imagine it does!
> >>>>
> >>>> Working with the Mono/Poly and Polsix has been taxing because
> > of
> >>>> frequent repairs (and I cannot afford to ship them out for
> >>>> professional work) but still very gratifying. The only thing
> > that
> >>>> bothers me about the Polysix is
the key contacts, I've tried
> >>> multiple
> >>>> repair techniques without a solid fix. I tried a few methods,
> > one
> >>>> recently which worked great for a month or two, and now a
> > number
> >> of
> >>>> the keys are back to not playing, or intermittent. I also used
> >> the
> >>> MG
> >>>> Electronics keypad repair kit, which worked great on my
> >> Mono/Poly,
> >>>> still working 10 years later with no key dropouts, but the
> >> Polysix
> >>>> for some reason has always had a problem.
> >>>>
> >>>> Anyways, I'm so glad it's working again. Back to normal.
> >>>>
> >>>> Rich
> >>>>
> >>>>
> >>>>
>
>>>> --- In korg_mono-poly@ yahoogroups. com, "hoggybogger"
> >>>> <hoggybogger@ > wrote:
> >>>>> Thanks for the reply Florian - I am wondering where to
> > measure
> >> on
> >>>> the
> >>>>> low/mid/high switch, there are eight points - do I just
> > choose
> >>> any
> >>>>> one of the four pairs and do them across?
> >>>>>
> >>>>> I'm confused on how to measure the VCA out and VCF out
> >>> testpoints,
> >>>>> would I be looking for some kind of voltage reading, or is
> > that
> >>> for
> >>>>> placing the output to an amp like an audio cable to test for
> >>> sound?
> >>>>> Thanks again for your help, I will have a
chance to test some
> >>>> things
> >>>>> out when I get out of work in around five hours.
> >>>>>
> >>>>> Rich
> >>>>>
> >>>>> --- In korg_mono-poly@ yahoogroups. com, Florian Anwander
> >>>>> <fanwander@> wrote:
> >>>>>> Hi
> >>>>>>
> >>>>>> hoggybogger schrieb:
> >>>>>>> The only sound I seem to be able to get out of this, with
> >>> it
> >>>>>>> completely cranked up, is when the noise potentiometer is
> >>>> turned
> >>>>> up,
> >>>>>>> and the resonance and cutoff turned up. I can get a very
> >>> faint
> >>>>> hissy
>
>>>>>>> noise when I'm playing, and if I turn the resonance and
> >>> cutoff
> >>>>> while
> >>>>>>> playing it changes the noise like you'd expect it to.
> >>> Just
> >>>> almost
> >>>>>>> completely inaudible, this was all the way up and then
> > fed
> >>> into
> >>>> a
> >>>>>>> mixer with the gain all the way up.
> >>>>>> This is good. It says the SSM2044 is not broken.
> >>>>>>
> >>>>>>> I took the knobs off and backed the nuts off the pots,
> > and
> >>> took
> >>>>> the
> >>>>>>> CN16 connector off and measured pin 3, but I didn't
> >>> seem to
> >>>
be
> >>>>>>> getting anything. Should I be measuring it from the wire
> >>>> harness
> >>>>> that
> >>>>>>> goes into it? That's where I measured it. I could be
> >>> doing
> >>>>> something
> >>>>>>> wrong. I did not check the CN2 pin 3, I was having
> >>> difficulty
> >>>>> finding
> >>>>>>> it and had to quickly come up with an alternate solution
> >>> for
> >>>>>>> performing this wednesday night.
> >>>>>> Basically I still think it is something not very
> > troublesome;
> >>>> maybe
> >>>>> the
> >>>>>> low/mid/high- Levelswitch or the volume potentiometer is
> > dirty
> >>> or
> >>>>> (in
> >>>>>> worst case) broken. But both you could temporarily heal by
> >>>> bridging
> >>>>> them.
> >>>>>> You may try to measure (or listen with an cable) to the
> >>> following
> >>>>>> testpoints:
> >>>>>>
> >>
http://fa.utfs. org/diy/korg_ monopoly/ mp_13_klm_ 353_layout_
> > testpoints. j
> >>>>> pg
> >>
http://fa.utfs. org/diy/korg_ monopoly/ mp_14_klm_ 355_layout_
> > testpoints. j
> >>>>> pg
> >>>>>> These show the pcbs from the solderside, so you don't have
> >>> to
> >>>>>
remove the
> >>>>>> pcbs from the front. The testpoints are marked yellow.
> >>>>>>
> >>>>>>
> >>>>>> Florian
> >>>>>>
> >>>
> >>>
> >>>
> >>> ------------ --------- --------- ------
> >>>
> >>> Yahoo! Groups Links
> >>>
> >
> >
> >
> >
> > ------------ --------- --------- ------
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
