[sdiy] Weird JX3P midi behavior

[MTG]

12

On 11/27/2012 1:00 AM, Richie Burnett wrote:
> If it's transmitting MIDI garbage and not receiving properly I'd start by checking the clock frequency to the microprocessor. It sounds like it might be running at the wrong baud rate. I dont have service notes for the 3P at hand, but I'm sure someone can tell you what the MHz are meant to be.
>
> -Richie,
>
>
> Travis Thatcher <recompas at gmail.com> wrote:
>
>> Hi Florian,
>>
>> I finally got back home and opened up my JX3P for further testing.  I
>> tried all functions without the programmer hooked up and all worked,
>> as well a switches/led's. Every panel seemed accessible. I checked to
>> see if the switch was working by trying to write to the seq (it only
>> works in the appropriate programmer mode). I also put an led on the RX
>> test pin on the main board, with a current limiting resistor going to
>> +5v. When I sent midi input into the jx the led lit up so it appears
>> the opto coupler is functioning as it should. Again, when not switched
>> to midi position the LED did not light.  Midi Thru does work.
>>
>> I did another test looking at the midi output of the jx in midi mode
>> using MIDI Monitor. Here is what the output was when one note was
>> pressed (first line of output generated) then released
>>
>> 15:36:25.754	From MIDI Port	Note On	1	D4	1
>> 15:36:25.802	From MIDI Port	Note On	1	D4	1
>> 15:36:25.803	From MIDI Port	Stop		
>> 15:36:25.804	From MIDI Port	Invalid		1 bytes
>> 15:36:25.804	From MIDI Port	Clock		
>>
>> Any ideas on what to check next?
>> T
>>
>> On Thu, Nov 8, 2012 at 10:15 AM, Florian Anwander
>> <fanwander at mnet-online.de> wrote:
>>> Hello Travis
>>>
>>>
>>>> 1. Midi out - note on events are only firing when you let up a key. No
>>>> note off events are happening and nothing happens when you depress a
>>>> key, only when you let off.
>>> Hmm, do the switches and LEDs on the panel work, as they should? Can you
>>> edit every parameter from the panel? (disconnect the programmer for this
>>> test!).
>>>
>>>
>>>
>>>> 2. Midi in - not responding at all to midi input
>>> Memory protect switch in the wrong position or broken.
>>>
>>> Florian
>>>
>>> --
>>> http://fa.utfs.org/
>>
>>
>> -- 
>> http://www.travisthatcher.com
>> http://www.soundcloud.com/travisthatcher
>> http://voiceofsaturn.blogspot.com
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