Hi !
it's not very complex if you have the schema, or at least the general layout of your synth. Touch each IC in the right part of the electronics (here the analog output circuit)with your fingertip, the hotter one might be nearly dead. But some ICs like the voltage regulators are normally hot. Of course avoid it when the mains voltage is present, but on most synths there is an external DC supply, and the voltages are low (9 or 12 V, 5V for the logic ICs, even less for the DSPs or µPs).
And NEVER put your fingers in a power amp, mostly with tubes!!
A more sophisticated way to detect a heat related failure uses a "cold spray" (available in electronic parts shops): cool down each suspect chip when the sound goes wrong; if the problem disappears you've found the failed device. Now the main problem is to find a new one, in modern instruments you have a lot of specific ICs only available by Yamaha (or other brand), if they agree to sell you one....
Cheers
J.F.
> Message du 14/02/08 23:03
> De : "nung242"
> A : AN1x-list@yahoogroups.com
> Copie à :
> Objet : Re: [AN1x] Re: Sound problems with AN1x
>
> > Its starting to sound like what one of the previous comments said, a drifting IC chip or maybe a circuit that flakes out when it gets warm. I have a novation KS-4 that does the same thing, its irritating because I can use it for live shows anymore, cant trust it.
>
> Jason - TILLTHEN - http://www.youtube.com/tillthenmusik
>
> Arthur Alexander Crichton <ac010b4919@...> wrote: Hi,
>
> I don't have midi connected on my AN1x. The only cables connected are
> the power supply, headphones and line outputs.
>
> Cheers
>
> Arthur
>
> --- In AN1x-list@yahoogroups.com, Alex Baumann ..> wrote:
> >
> > I think the suggestion to disconnect everything but power and audio
> may be a good one. Try this for a little while, because one
> possibility is that something in your midi chain is sending it
> controller data like volume and cutoff. Do you think that is
> possible?
> >
> > Alex
> >
> > ----- Original Message ----
> > From: Arthur Alexander Crichton ...>
> > To: AN1x-list@yahoogroups.com
> > Sent: Thursday, February 14, 2008 9:10:01 AM
> > Subject: [AN1x] Re: Sound problems with AN1x
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > I have tested my AN1x with just the headphones
> connected and the
> >
> > problem seems to have disappeared. I then tested with the line
> >
> > outputs connected and still there is no problem. Finally I tested
> >
> > with the headphones and line outputs both connected and again no
> >
> > problems.
> >
> >
> >
> > The problem seems to have disappeared.
> >
> >
> >
> > Could it be that...
> >
> >
> >
> > 1) I pressed the "assign" button while powering on the synth that
> >
> > fixed the problem
> >
> >
> >
> > or
> >
> >
> >
> > 2) My AN1x is temperamental?
> >
> >
> >
> > Cheers
> >
> >
> >
> > Arthur
> >
> >
> >
> > --- In AN1x-list@yahoogrou ps.com, "Arthur Alexander Crichton"
> >
> > wrote:
> >
> > >
> >
> > > Haha its been along time since someone has called me Alex:) Ok, I
> >
> > > have removed the left and right line outputs and left the
> >
> > headphones
> >
> > > in. So far the problem has disappeared. I will disconnect the
> >
> > > headphones and connect the line outputs and see if the problem
> >
> > > returns.
> >
> > >
> >
> > > I'll report back if there is any probems.
> >
> > >
> >
> > > Cheers
> >
> > >
> >
> > > Arthur
> >
> > >
> >
> > >
> >
> > > --- In AN1x-list@yahoogrou ps.com, Jeff wrote:
> >
> > > >
> >
> > > >
> >
> > > > Hello Alex!
> >
> > > > as you describe your problem it looks like something wrong in
> the
> >
> > > analog output circuit: dry solder joint, bad contact or
> some "ill"
> >
> > op
> >
> > > amp or transistor that goes out when hot. The heat related
> failure
> >
> > is
> >
> > > probable because it works well for a short time and after the
> sound
> >
> > > decreases, a contact problem would occur more irregularly. I'm
> not
> >
> > at
> >
> > > home currently, so i cannot open mine to tell you what to look
> and
> >
> > > where. I don't think it is a fatal issue at all, but it could
> take
> >
> > a
> >
> > > long time to find the faulty part.
> >
> > > > You can try 2 things without opening the synth:
> >
> > > > First remove all additional devices (effects, patch bay..)
> >
> > between
> >
> > > the AN1x and the amp or mixer.
> >
> > > > Then turn on your synth with the line out plugged only,play it,
> >
> > > > and after do the same thing without line out but with
> headphones
> >
> > > only.
> >
> > > > If you're using a mixer try another input with the line out
> >
> > > connected.
> >
> > > > Look (or more likely hear !) if there is some difference.. ..
> >
> > > > Cheers
> >
> > > > J.F.
> >
> > > >
> >
> > > >
> >
> > > > > Message du 14/02/08 00:42
> >
> > > > > De : "Arthur Alexander Crichton"
> >
> > > > > A : AN1x-list@yahoogrou ps.com
> >
> > > > > Copie à :
> >
> > > > > Objet : Re: [AN1x] Sound problems with AN1x
> >
> > > > >
> >
> > > > > > Ok, I tried a factory reset and played the affected sounds
> >
> > > again and
> >
> > > > > it seemed to fix the problem. Then I leave my AN1x on and 5
> >
> > > minutes
> >
> > > > > later the problem comes back:(
> >
> > > > >
> >
> > > > > What will I do? Is my AN1x ready for the synth graveyard in
> the
> >
> > > sky?
> >
> > > > >
> >
> > > > > Please advise
> >
> > > > >
> >
> > > > > Arthur
> >
> > > > >
> >
> > > > > --- In AN1x-list@yahoogrou ps.com, "Arthur Alexander
> Crichton"
> >
> > > > > ...> wrote:
> >
> > > > > >
> >
> > > > > > How do I reload the OS?
> >
> > > > > >
> >
> > > > > > Is it the same as a factory reset? If so, I did a factory
> >
> > reset
> >
> > > but
> >
> > > > > > the problem still persists.
> >
> > > > > >
> >
> > > > > > The problem is when I keep the key pressed the sound just
> >
> > > abruptly
> >
> > > > > > goes dull and low in volume which it shouldn't do. Its like
> >
> > the
> >
> > > > > > cutoff has gone to "0" and the main volume has gone low.
> >
> > > > > >
> >
> > > > > > Cheers
> >
> > > > > >
> >
> > > > > > Arthur
> >
> > > > > > --- In AN1x-list@yahoogrou ps.com, nung242 wrote:
> >
> > > > > > >
> >
> > > > > > > I would try backing up your patches, then maybe reload
> the
> >
> > > OS. It
> >
> > > > > > worked for a problem I was having on my K-Station. Good
> Luck!
> >
> > > > > > >
> >
> > > > > > > http://www.youtube com/tillthenmusi k See the AN1x in
> >
> > > > > > action on the song " legend "
> >
> > > > > > >
> >
> > > > > > > Arthur Alexander Crichton >
> >
> > > > > > wrote: Hi,
> >
> > > > > > >
> >
> > > > > > > I have a problem with my Yamaha AN1x.
> >
> > > > > > >
> >
> > > > > > > When I select some pad sounds on my AN1x the sounds are
> >
> > > bright
> >
> > > > > and
> >
> > > > > > > after about 3 seconds the sound just cuts off to a duller
> >
> > > sound
> >
> > > > > > which
> >
> > > > > > > is very low in volume. When I press the keys again all I
> >
> > get
> >
> > > is
> >
> > > > > a
> >
> > > > > > > faint dull sound. I try to play the keys harder but I
> still
> >
> > > get
> >
> > > > > > this
> >
> > > > > > > sound. Before I had this problem, those paticular patches
> >
> > > used
> >
> > > > > to
> >
> > > > > > > sound bright and full. Also, I have noticed some sounds
> >
> > sound
> >
> > > > > > thinner
> >
> > > > > > > than what they used to and that sounds that rely on
> >
> > arpeggio
> >
> > > or
> >
> > > > > > lfo
> >
> > > > > > > sound muddy and strange.
> >
> > > > > > >
> >
> > > > > > > What is wrong with my beloved AN1X?
> >
> > > > > > >
> >
> > > > > > > I have tried cleaning the control knobs with switch
> cleaner
> >
> > > but
> >
> > > > > I
> >
> > > > > > > still get the same problem. BTW the rom version on my
> AN1x
> >
> > is
> >
> > > > > v1.02
> >
> > > > > > >
> >
> > > > > > > Please help.
> >
> > > > > > >
> >
> > > > > > > Arthur
> >
> > > > > > >
> >
> > > > > > >
> >
> > > > > > >
> >
> > > > > > >
> >
> > > > > > >
> >
> > > > > > >
> >
> > > > > > > ------------ --------- --------- ---
> >
> > > > > > > Never miss a thing. Make Yahoo your homepage.
> >
> > > > > > >
> >
> > > > > > > [Non-text portions of this message have been removed]
> >
> > > > > > >
> >
> > > > > >
> >
> > > > >
> >
> > > > >
> >
> > > >
> >
> > > >
> >
> > > > [Non-text portions of this message have been removed]
> >
> > > >
> >
> > >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> __________________________________________________________
> ______________
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