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Subject: Re: [korgpolyex] Re: Newly installed HAWK 800 problem

From: Michael Hawkins <korgpolyex800@...>
Date: 2012-03-11

If it flashes the displays 88 88 88 but doesn't show HA-800, then I would say you have one or more address lines not soldered or perhaps even bridged.

Check that none of the ribbon cable pins have bent over.
Then double check all of the soldering and check for bridges.

You can always email me directly for installation problems too. Especially if you get to the point where you've run out of options. I have had probably half a dozen customers send their HAWK boards back to me when they couldn't get them working.

Mike
From: narfman96 <narfman96@...>
To: korgpolyex@yahoogroups.com
Sent: Sunday, March 11, 2012 8:33 AM
Subject: [korgpolyex] Re: Newly installed HAWK 800 problem

 
Have you tried holding down the Write button when you turn it on to enter diagnostics mode?

--- In korgpolyex@yahoogroups.com, "eshalsall" <eshalsall@...> wrote:
>
> I noticed another thing when I turn it on. Through the headphone output I can hear the filter cutoff slowly sweep from closed to open and the noise generator is on.
>
> --- In korgpolyex@yahoogroups.com, "eshalsall" <eshalsall@> wrote:
> >
> > I just recently installed the HAWK 800 mod in my Poly 800 MK1. When I turn it on the display flashes "88 88 88" and doesn't change to the "HA-800" as said that it should in the manual. I tried to test all of my work after this happened. I replaced the two original chips, desoldered the cpu write jumper and the synth worked fine with the original configuration. I checked continuity on the ribbon connectors. I also checked every solder joint on the hawk board and that the chips were in the right place.
> >
> > I have the boot ROM v. 1.95
> >
> > Please help
> >
> > Thanks,
> >
> > Ethan
> >
>