Yamaha CS80

The note ping is just to let you know it is ready to play, isn't it? I thought they all did that. 

D


--- In yamahacs80@yahoogroups.com, Bob Stewart <bob@...> wrote:
>
> Hi Matt.
> 
> The first two issues are probably alignment issues (VCA and Envelope). I'd
> go through a full calibration before I start changing stuff.
> C# ping is odd, but if it's just happening on start up it may be nothing to
> worry about.
> These machines (according to the manual) take 20-30 seconds from switch on
> to settle to a playable state.
> Is the Hum a 60hz kind of hum?
> Could be you have a loose earth connection somewhere.
> 
> Dead presets is very odd, as they're all set by passive means. Check the
> preset boards just in case someone has depopulated them, or wires have come
> off.
> 
> Small green caps should be OK. Problem caps are tantalums and
> electrolytics. I don't think the green caps are either of these, but I'd
> need to double check the service manual. That's not to say other types
> don't go wrong. They can, but it's unusual.
> 
> B
> 
> On Monday, June 10, 2013, velomatte wrote:
> 
> > **
> >
> >
> > All,
> >
> > So after re-capping and re-CMOS-ing the power supply, SH and replacing the
> > SUB board I was able to tune the CS50. All the octaves are in tune! I
> > borrowed an o'scope and have to get to it on the other calibrations because:
> >
> > 1 voice is louder than others upon pressing a key -maybe short attack for
> > that card?
> > 1 voice trails off longer than the others -maybe long release for that
> > card?
> > there is a C#-ish ping upon start up that goes away
> > there is occasionally a hum in the background like when a string
> > divide-down keyboard has a bad capacitor for a single note
> > very few of the presets sound anything like I remember them sounding when
> > I had my last CS50. Some make no sound at all.
> >
> > Question: should I replace all the green small value capacitors? If so
> > does anyone have a brand or type they recommend? I was going to get some
> > from my local electronics shop but they looked nothing like the ones they
> > would replace.
> >
> > Anyone have recommendations of what to look for for the above problems?
> >
> > Onward!
> >
> > Matt in Oakland
> >
> >  
> >
> 
> 
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>