Jon,
I did a google search on "NTE185 replacement" and "NTE254 replacement"
and got plenty of hits where you can get those transistors.
Let us know how you progress.
Mike.
--- In korgpolyex@yahoogroups.com, "Jon" .> wrote:
>
> Hi!
>
> New to the group and proud owner of a broken Poly 800 MKII!
>
> The guy who owned it before me tried to restore it, with poor
results (I think his plan was to
> cover it with solder and pray it works afterwards.. it didn't!).
>
> I've cleaned his mess up. But I'm missing Q1 and Q18 looks kinda abused.
>
> Since Q1 - B744 is no longer in production. It's replaced by NTE185
- hard to get for me and
> expensive. And it's the same with Q18 - B794 replaced by NTE254.
>
> So I was wondering if you guys have any suggestions for other parts
i could exchange Q18
> and Q1 with?
>
> Thanks!
>
> //Jon
>
Message
where to find parts to replace Q1 and Q18? bringing dead polys back to life!
2007-11-10 by Marcus Wilson
BD140
.85c ea
Q18 can be replaced by:
BD139
.85c ea
just be sure to ensure they are in the right way around!
I have had 3 polys with no powerup, and dirty looking transistors.
By replacing these 3 transistors I have been able to resurrect 3 polys so far!
this secret is now out, and good luck to all who wish to try to repair a dead poly using this replacement method.
Once these are replaced you should be able to see 11 P on the display of the poly, and re-load your patches.
Best Regards,
Marcus Wilson
On 10/11/2007, at 10:35 PM, korgpolyex800 wrote: