The Yamaha AN1x Synthesizer mailing list

ed.beer a \ufffdcrit :
>
> How are the ROMS mounted ? Is it a solder job or clip in ?
>
If i remember well the EPROM IC (only one piece) is simply plugged in a 
standard IC socket. Not the "zero insertion force" type with a clip but 
a standard socket... Of course you don't need any solder. Just remove 
gently the old EPROM using a little screwdriver as a lever on both ends 
of the IC, take the new one and put it firmly at the same place.
However, be careful :
- of the mark on the IC plastic case showing the nr 1 pin . "Good" 
sockets wear the same kind of mark or dot one one end, so take your time 
and look carefully at the initial position. If it's in a wrong position 
it does not work, but normally it does no harm to the EEPROM (supply and 
input - output voltages are equal on most logic ICs). My advice : you 
better do it right first..
- to put all the (40, if i remember well) pins in the holes of the 
socket, push on both ends of the IC : don't miss a row of pins, don't 
bend them inside or outside the socket and so on.... A little useful 
trick : take the IC by both ends and bend (yes..) a little the pins 
against some hard surface to get a 90\ufffd angle between the pins and the 
case, the mounting will be easier.
- of ESD (electro static discharge) if you work in a cold and dry 
atmosphere wearing nylon, Polartec or other synthetic clothes. This is 
one of the terrors of CMos ICs...

Cheers.
J.F.

>
> --- In AN1x-list@yahoogroups.com <mailto:AN1x-list%40yahoogroups.com>, 
> "millsmike36" <djmikemills@...> wrote:
> >
> > It solved my problem straight away and its not that difficult to do...
> >
> > took me longer to unscrew the screw ont he case than the upgrade
> >
> > --- In AN1x-list@yahoogroups.com 
> <mailto:AN1x-list%40yahoogroups.com>, Peter Korsten <peter@> wrote:
> > >
> > > Op 10-1-2011 8:24, Uwe schreef:
> > >
> > > > My blip problem did not solve yet, but I found out, that it only 
> appears, when a sound is selected, that uses both scenes. As far as 
> only one scene is active, my AN1X behaves quite well.
> > > >
> > > > Any suggestions yet?
> > >
> > > Your AN1x is not going to die. This is a well-known issue, that 
> can be
> > > resolved by installing an OS update. But this involves swapping 
> chips,
> > > so it's perhaps not for everybody.
> > >
> > > - Peter
> > >
> >
>
>