The Yamaha AN1x Synthesizer mailing list

Hi Jonas !
First, are you sure of your new battery ? Check it with a voltmeter, it 
could be a bad one ("new" old stock...) . With no load the voltage must 
be at least 3,3 V, is it the right model (CR 2450) if i remember well.
> Which means the keyboard is useless and that I have to trow it away. I 
> hate trowing stuff away that could be fixed...
Of course, and i don't think it's a fatal issue.
You've checked all the connectors, cables, ribbons and so on ? Good idea 
but if your synth performed well before the battery replacement i don't 
think it could be a problem, unless you've done something wrong during 
the operation...
What i would do if it was mine :

  * remove the battery, power it up and try to perform the full factory
    reset . It works ? Then the cause is the new battery ... or
  * with the synth open, the power OFF (important, to be completely sure
    remove the power supply) do a momentary short circuit (yes !)
    between both sides + and minus of the battery socket (it has been
    removed, remember !), it will completely reset the static RAM where
    the patches are stored. There is a lot of capacitors inside the
    AN1x, the RAM itself could be considered as a bunch of very small
    capacitors (it's CMos) and it could be in some "undetermined" state,
    neither "empty" nor in backup mode.
  * after these operations, replace once again the battery, reassemble
    the synth and then do a full factory reset , it SHOULD work.

Some people use a "kamikaze way" to change the battery without losing 
their beloved patches when they have no external backup facility . They 
change it "live", with the synth open but powered. It works but you have 
to be very careful to avoid any short circuit between anything and 
anything else !

Don't panic, the AN1x is very reliable and mostly composed of digital 
ICs which are reliable too, much more than their analog counterpart. 
That's one reason why the old Prophets Moogs and others vintage synths 
disappeared....

Cheers.
J.F.




joohlund a \ufffdcrit :
>
> My name i Jonas and I just replaced the battery in my Yamaha AN1x. 
> When I started it up after the battery replacement I got the ordinary 
> welcome message and then a couple of weird characters. The numeric 
> keys + the Knob Parameter Group is not responding at all. This means I 
> can't do the factory reset. Which means the keyboard is useless and 
> that I have to trow it away. I hate trowing stuff away that could be 
> fixed...
>
> I've dissembled the synth completely, checked for loose connectors and 
> cable, even started it up and messed around under the hood while 
> pressing the num keys without any luck...
>
> You guys are my last hope! Any ideas are very appreciated!
> Thanks in advance.
>
> Regards,
> Jonas
>
>