Looks like a solder joint suffering from thermal cycling... IMHO in the
audio section of the PCB. First things to look at : the output jacks and
the volume pot.
Other possible cause of failure : the connectors and ribbon cables. You
can clean the contacts with a cleaner fluid sold in electronics stores,
mostly in sprays. But if the failure is not at random, neither
permanent, but "time related" it means very often "heat related".
I suppose that "Yamaha approved" repair shops can still do the job,
because i don't think there is a bad chip to replace . But a time
consuming examination of the PCB, unless the problem is well known...
@+
J.F.
P.S. : what do you call "digital fragmentation" ? A kind of "chopped"
sound ? An aliasing noise ?
Uwe a écrit :
>
> Help!
>
> My beloved AN1X worked well for about 8 Years now, but in the last 6
> month it starts making noises, like digital fragmentation, short blips
> and short noise sounds. The sound is still hearable, but more in the
> background.
> When it started, the noises disappeared after a short while, but last
> week it lasteed throughout the session.
> MIDI is still working, the display is fine, encoders are working.
>
> I searched the board for the symtomps, but the results are quite
> disencourageing.
>
> Any idea, if fixing is still provided by Yamaha?
>
> Greetings,
>
> tonmanns
>
>