The Yamaha AN1x Synthesizer mailing list

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 \ufffdcrit :
>
> 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
>
>