Korg Poly800/EX800 Users

sounds like an excellent start anyway!@

i have put my poly to one side at the moment, as i had no clue as to 
where to proceed, this at least gives me a direction.

once again thank you for the info, hopefully it will bring one more 
poly back to life!

thanks!

Marcus
On Monday, July 19, 2004, at 05:34 AM, x x wrote:

> Ok im looking up chip today you will have to find the chip on the net 
> I dont think ill have one to spare. It wasnt easy locating the last 
> set ...
> It sounds so like the main problem described in the tech notes up date 
> that I fixed a poly with ....
> Will let you know today.
> Patrick
>
> Marcus Wilson <JB@...> wrote:
>
> awesome!~
> i'd be very keen to find out more.
>
> Mine was dead until i replaced a couple of power transistors in the +/-
> 5V stage that were buggered, and had been poorly messed with by a
> previous owner.
> I bought mine for $10 in a carpark junk sale, and took it home,
> managed to get the midi control side going so now i can control my
> other gear with the poly,
>
> all of the patches etc can be edited stored etc, and i managed to
> reload factory settings too, but no sound out.
>
> It looked like the clock and everything was performing properly but no
> tone out of the tone generator.
>
> Soldering is easy for me, so if you can point me to the correct
> component, i should be able to make it happy again, and that would be
> awesome!
>
> thanks again for your info so far.
>
> Marcus
> On Sunday, July 18, 2004, at 06:03 PM, x x wrote:
>
> > It is one toshiba chip that needs to be replaced.
> > It is mentioned in the service manual should all work but no sound be
> > heard from the poly 800. Its on the main board. The number of the 
> chip
> > is on my schematics . I cant gurentee it but it is in the service
> > notes. apperntly enough of the same prob happend that this was a 
> major
> > note. Im not saying this is or isnt .But Ive bought a few poly 800s
> > and its one or the other chips for the output control to the sound
> > source of the poly 800....
> > If interested Ill get the part number and email the service note. If
> > you can solder very finely its not a big chip. I dont know if I have 
> a
> > spare im pretty much building up parts to keep for me when this
> > happens again. SinceI have three and I bought some extras let me see
> > what I find out when I look through my parts bin I collect toshiba
> > chips and major processors for the poly .Im now starting to with the
> > juno. I will sale poly 800 keys now and some other stuff .This will
> > also change I bid on every broken one I can find...
> > Peace
> > Alien
> >
> >
> > Marcus Wilson wrote:
> >
> > mines a poly800 yeah
> >
> > all works for midi control
> > no tone generation tho
> >
> > looking for a working tone generator for it
> >
> > Marcus
> > On Saturday, July 17, 2004, at 09:54 AM, x x wrote:
> >
> > > is that a poly 800?
> > >
> > > Marcus Wilson wrote:
> > >
> > > have you got any tone generator chips you could send me?
> > >
> > > my poly works on the digital side, all the patches store etc, midi
> > out
> > > works, just nothing comes out of the tone generator!
> > >
> > > ive put a cro over the data lines, and signals and clock all appear
> > to
> > > be working, just that chip has no output on the tone lines.
> > >
> > > any help available?
> > >
> > > best regards,
> > >
> > > Marcus in Oz
> > > On Saturday, July 17, 2004, at 06:45 AM, x x wrote:
> > >
> > > > I collect dead poly 800s////
> > > >
> > > > skunkride wrote:
> > > >
> > > >
> > > > Nice one Julio !  Gives me hope about my dead Poly....
> > > >
> > > >
> > > >
> > >
> > > >
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