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 <JB@...> 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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