Korg Poly800/EX800 Users

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.

Send your HAWK to me, along with the ribbon cables, and I can check it to make sure it's all OK.

/Mike

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

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