Korg Poly800/EX800 Users

Are you using the same power supply on each synth? Do you swap them
over?
/MikeOn Mon, 2019-06-10 at 02:33 +0000, studio_1a@... [korgpolyex]
wrote:
> Ok this could turn out to be an interesting fact, I have captured all
> 11 waveforms from A>L from the KLM596 schematic on my Tektronix scope
> including the said CPU RES6.5 without any midi hookup at all and it
> looks identical, this from my POLY800 KLM596-4 w/830236 eprom(1). The
> EX800 KLM596-7 also works with the same eprom(1) and same waveforms
> confirmed.
> 
> Now, and I'm just trying to figure out the EX800 issue, is it then
> that because the EX800 does not have a keyboard the 63B50 waits on a
> keyboard pulse thru RX_data first to send /IRQ pulse to CPU RES6.5?
> I'm pretty sure the RES6.5 is necessary as I can witness this on my
> POLY800 without any midi,
> 
> Is that the correct process for the EX800 ?
> 
> Because I did hook up a controller keyboard to the EX800 and got no
> sounds from it even after manually programming a few, that's when
> replaced some IC's and finally swapped eproms and confirmed the
> KLM596 -7(EX800 & eprom(1)) was working fine in my Poly800. Then
> programmed 2 new EX800 #840206 eproms and still no sound and no
> RES6.5,
> 
> Tonight, I will put the Poly800 aside and concentrate on the EX800
> pulses,
> 
> I'm pretty sure its not the eprom but something has to give..
> 
> 
> 
> 
> 
>