Archive of the former Yahoo!Groups mailing list: Korg Poly800/EX800 Users

Panel buttons still play notes, no keys operate.

--- In korgpolyex@yahoogro ups.com, Michael Hawkins <korgpolyex800@ ...> wrote:
>
> OK, now plug the CN3 back in and then unplug the keyboard connector and tell me if the front panel keys still play notes or if everything works as it should.
>
> If not, then we can move on to the next step.
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>
> ____________ _________ _________ __
> From: indyisking <indyisking@ ...>
> To: korgpolyex@yahoogro ups.com
> Sent: Sat, November 7, 2009 12:30:12 PM
> Subject: [korgpolyex] Re: Hawk 800 Mod issues
>
>
> Still only the notes above the second from top G# work. It is playing the correct note and the 8th chromatic note below 2 octaves down it.
>
> An example is G# 4 and C 2 are playing when the G# 4 is pressed.
>
> The buttons no longer play any notes (Or have any effect as I assume was intended by removing CN3)
>
> --- In korgpolyex@yahoogro ups.com, "korgpolyex800" <korgpolyex800@ ...> wrote:
> >
> > OK, as a test, disconnect CN3 from the main board and then let us know if the keyboard works all the way from the bottom key to the top. If the keyboard works, then it would seem that there is either a short on the CN3 cable itself or there is a short on the display/keypad board (that's excluding the possibility of a steering diode short but we will assume that's not the case for now). If the keyboard still doesn't work properly then let me know exactly which keys work and which ones don't. And if you are getting double notes when playing some keys then use a MIDI monitor to determine the exact MIDI notes that are being played together. This will allow us to pin down the exact data lines that are either shorted out, or the exact diodes to check.
> >
> > Mike
> >
> >
> >
> > --- In korgpolyex@yahoogro ups.com, "indyisking" <indyisking@ > wrote:
> > >
> > > I have scoured the main board extensively looking for a bridge and have not found one but in my testing realized the joystick is not operating either. Tomorrow I will pull the display board and examine the keyboard though it seems unlikely to have anything going on there as I have not removed them or worked on them before.
> > >
> > >
> > > --- In korgpolyex@yahoogro ups.com, Michael Hawkins <korgpolyex800@ > wrote:
> > > >
> > > > this "the program number buttons play notes and also do their normal function." tells me that you have a solder bridge somewhere on the keyboard multiplexing chip input lines on IC33 or on the keyboard itself or the display/keypad board.
> > > >
> > > > My guess is that since you did the HAWK-800 install, you have ended up with a bit of solder on or around the IC33 pins. I would check there.
> > > >
> > > > Mike
> > > >
> > > >
> > > >
> > > >
> > > > ____________ _________ _________ __
> > > > From: indyisking <indyisking@ >
> > > > To: korgpolyex@yahoogro ups.com
> > > > Sent: Thu, November 5, 2009 7:46:55 PM
> > > > Subject: [korgpolyex] Re: Hawk 800 Mod issues
> > > >
> > > >
> > > > I got it to 11 P and the patches are loaded and working. It even operates completely with an external midi controller.
> > > >
> > > > It is just that the the keys below the G# don't work, the keys G# and above play dissonant notes, and the program number buttons play notes and also do their normal function.
> > > >
> > > > --- In korgpolyex@yahoogro ups.com, Michael Hawkins <korgpolyex800@ ...> wrote:
> > > > >
> > > > > Tom,
> > > > >
> > > > > Can you remind me as to where you got with your installation? Did you get 11 H or 11 P on start up or not?
> > > > >
> > > > > Mike.
> > > > >
> > > > >
> > > > > ____________ _________ _________ __
> > > > > From: indyisking <indyisking@ ...>
> > > > > To: korgpolyex@yahoogro ups.com
> > > > > Sent: Thu, November 5, 2009 2:39:09 AM
> > > > > Subject: [korgpolyex] Re: Hawk 800 Mod issues
> > > > >
> > > > >
> > > > > Hello,
> > > > >
> > > > > Have an extended period of putting this off and trying not to think about it I'm back at working on my poly. I took it apart again and examined everything and nothing is visibly astray.
> > > > >
> > > > > Unfortunately It is a bit beyond my knowledge to electronically test the paths like you mentioned. I just don't have any idea what to do really.
> > > > >
> > > > > I have a multimeter and use it regularly to test voltages and diodes but don't know what to do in this context.
> > > > >
> > > > > -Tom
> > > > >
> > > > > --- In korgpolyex@yahoogro ups.com, Michael Hawkins <korgpolyex800@ ...> wrote:
> > > > > >
> > > > > > Also, you might want to check for shorts on the CN3 and CN5 connectors/pins on the main board.
> > > > > >
> > > > > > You will need to take a copy of the schematics from the files section here. And using that, work your way down the correct IC33 and IC34 data lines.
> > > > > >
> > > > > > I assume you have a multimeter.
> > > > > >
> > > > > > Mike
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > ____________ _________ _________ __
> > > > > > From: indyisking <indyisking@ ...>
> > > > > > To: korgpolyex@yahoogro ups.com
> > > > > > Sent: Tuesday, September 29, 2009 3:44:38 PM
> > > > > > Subject: [korgpolyex] Re: Hawk 800 Mod issues
> > > > > >
> > > > > >
> > > > > > I pulled, checked, and reset CN3, CN4, and CN5. All were in the correct places and seemed to be set completely and correctly. With CN3 pulled the programming buttons do not function and do not play notes and the said keys work. With CN5 pulled (and CN3 set) the keys do not function and the programming buttons work but also produce notes. Watching the midi signals received when the functioning keys are pressed send two different notes and once. The programming buttons send only one note. Keys below the working keys transmit no midi on/off data.
> > > > > >
> > > > > > -Tom
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