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HAWK800 acting up all the time

HAWK800 acting up all the time

2015-04-28 by Grit

Hi all,

well about a year ago I was the happy owner of a HAWK800 + atomahawk but after I built it in the poly only acted weird.
Have't used it that much since, also because the machine detuned like crazy, I thought it was the pitch circuit but no.

Now after this long period I had the energy to desolder the mods and make them semi-permanent.

So, all boards out. Machine is happy again, on every front.
I reinstall the HAWK800 - > detuned and lower octave not responding.
Hawk out -> nice and dandy again.

When I first got the HAWK800 I got a strange error with a rom mismatch of some sort. I had to reflash the rom to 1.98, (swap the roms to a different socket and such that all worked out - well... the machine still played)
I reinitialized patches, changed EX/Poly rom mode, checked my welding, ... you name it. all was looking fine except that my Poly MK1 just does not like the HAWK kit; same issues as above.

So. I'm at a loss here and it's killing the fun in my Poly800... I hope anyone has a golden tip, maybe how to reinitialize the roms to their proper initialized values. otherwise I'll most likely have to pull it all out, install two pots and be happier with a slayer mod.

Re: [korgpolyex] HAWK800 acting up all the time

2015-04-28 by Michael Hawkins

Send your HAWK to me, along with the ribbon cables, and I can check it to make sure it's all OK.
/Mike
Show quoted textHide quoted text
      From: "Grit ultragalore@... [korgpolyex]" <korgpolyex@yahoogroups.com>
 To: "korgpolyex@yahoogroups.com" <korgpolyex@yahoogroups.com> 
 Sent: Tuesday, April 28, 2015 9:08 AM
 Subject: [korgpolyex] HAWK800 acting up all the time
   
    Hi all,
well about a year ago I was the happy owner of a HAWK800 + atomahawk but after I built it in the poly only acted weird.Have't used it that much since, also because the machine detuned like crazy, I thought it was the pitch circuit but no.
Now after this long period I had the energy to desolder the mods and make them semi-permanent.
So, all boards out. Machine is happy again, on every front.I reinstall the HAWK800 - > detuned and lower octave not responding.Hawk out -> nice and dandy again.
When I first got the HAWK800 I got a strange error with a rom mismatch of some sort. I had to reflash the rom to 1.98, (swap the roms to a different socket and such that all worked out - well... the machine still played)I reinitialized patches, changed EX/Poly rom mode, checked my welding, ... you name it. all was looking fine except that my Poly MK1 just does not like the HAWK kit; same issues as above.
So. I'm at a loss here and it's killing the fun in my Poly800... I hope anyone has a golden tip, maybe how to reinitialize the roms to their proper initialized values. otherwise I'll most likely have to pull it all out, install two pots and be happier with a slayer mod.

Re: [korgpolyex] HAWK800 acting up all the time

2015-04-28 by Michael Hawkins

Thinking some more...
"I reinstall the HAWK800 - > detuned and lower octave not responding."
This tells me that there is a problem with the HAWK hardware, probably a broken track, unsoldered pin, rolled over pin or perhaps even a problem with the 16 pin ribbon cable. Have you checked for broken pins? Have you used a multimeter to check the continuity of the ribbon cables?
/Mike
Show quoted textHide quoted text
      From: "Grit ultragalore@... [korgpolyex]" <korgpolyex@yahoogroups.com>
 To: "korgpolyex@yahoogroups.com" <korgpolyex@...m> 
 Sent: Tuesday, April 28, 2015 9:08 AM
 Subject: [korgpolyex] HAWK800 acting up all the time
   
    Hi all,
well about a year ago I was the happy owner of a HAWK800 + atomahawk but after I built it in the poly only acted weird.Have't used it that much since, also because the machine detuned like crazy, I thought it was the pitch circuit but no.
Now after this long period I had the energy to desolder the mods and make them semi-permanent.
So, all boards out. Machine is happy again, on every front.I reinstall the HAWK800 - > detuned and lower octave not responding.Hawk out -> nice and dandy again.
When I first got the HAWK800 I got a strange error with a rom mismatch of some sort. I had to reflash the rom to 1.98, (swap the roms to a different socket and such that all worked out - well... the machine still played)I reinitialized patches, changed EX/Poly rom mode, checked my welding, ... you name it. all was looking fine except that my Poly MK1 just does not like the HAWK kit; same issues as above.
So. I'm at a loss here and it's killing the fun in my Poly800... I hope anyone has a golden tip, maybe how to reinitialize the roms to their proper initialized values. otherwise I'll most likely have to pull it all out, install two pots and be happier with a slayer mod.

Re: HAWK800 acting up all the time

2015-04-30 by ultragalore@...

Well the lower octave thing turned out to be the note-follow function for the sequencer... I reset the global variables and after I checked the parameters this came to light... whoops *shame*...

The flash checksum (boot with 'bank hold' pressed) brought an error so I reflashed the whole rom thing.

I post the rom-update link here because I could not find it here in the yahoo support files:
The sole error is now just the pitch bend again, which is probably also the reason why it is detuned.
But there's nothing wrong with the pitch-bend when I have the Poly in original state. Could the extra IC's on the HAWK-kit draw that extra power which deregulates the pitch circuit? My PSU is 1A

Re: [korgpolyex] Re: HAWK800 acting up all the time

2015-04-30 by Michael Hawkins

Q: "But there's nothing wrong with the pitch-bend when I have the Poly in original state. Could the extra IC's on the HAWK-kit draw that extra power which deregulates the pitch circuit? My PSU is 1A"

A: I doubt that very much but you should check with a multimeter that both the +5V and -5V power rails are as close to +5 and -5 volts as you can get them. What you should do is check the continuity of the 16 pin header cable and also double check to make sure that all signals on the 16 pin cable are soldering and connected on the HAWK board. Also, are you able to modulate the DCO using extended parameters 31-38?

/Mike
Show quoted textHide quoted text
      From: "ultragalore@... [korgpolyex]" <korgpolyex@yahoogroups.com>
 To: korgpolyex@yahoogroups.com 
 Sent: Thursday, April 30, 2015 3:30 AM
 Subject: [korgpolyex] Re: HAWK800 acting up all the time
   
    Well the lower octave thing turned out to be the note-follow function for the sequencer... I reset the global variables and after I checked the parameters this came to light... whoops *shame*...
The flash checksum (boot with  'bank hold' pressed) brought an error so I reflashed the whole rom thing.
I post the rom-update link here because I could not find it here in the yahoo support files:http://sourceforge.net/p/hawk800/discussion/software/thread/383396e6/  The sole error is now just the pitch bend again, which is probably also the reason why it is detuned.But there's nothing wrong with the pitch-bend when I have the Poly in original state. Could the extra IC's on the HAWK-kit draw that extra power which deregulates the pitch circuit? 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