Korg Mono/Poly

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?\ufffd  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.\ufffd  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
>>>>>>
>>>
>>>
>>>
>>> ------------ --------- --------- ------
>>>
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