Vintage Synth Repair

Hi All,

I have a Kurzweil MicroPiano that used to play great, then one day it 
started sort of "swallowing notes" -- it's lost a bunch of voices so 
that now after maybe 10 notes it starts cutting off the first notes 
it played.

I also have several Kurzweil 1000 PX modules that I just love and use 
24/7, and am aware of their problems...which means I have pulled and 
cleaned all the ICs to get them working again, and resoldered some of 
the power joints that cracked.  They are now in good shape.

I took the MicroPiano apart a few months ago and looked around and 
didn't really see any similar issues so I cleaned it up put it back 
together, and have the same problem...nothing was fixed.

So, my question is whether anybody here is familar with the 
MicroPiano enough to know whether I can fix it or is it just not 
worth it?  I don't really need it for anything, but every once in a 
while it's useful for a remote performance of some sort or other.

Thanks!

Fred

>I have a Kurzweil MicroPiano that used to play great, then one day it
>started sort of "swallowing notes" -- it's lost a bunch of voices so
>that now after maybe 10 notes it starts cutting off the first notes
>it played.

Typically this isn't caused by a hardware issue, probably all sounds are 
generated on a single IC, if something goes wrong it just all dies at once 
rather than losing polyphony.

It's likely either a poorly-chosen setting (multitimbral allocation of 
voices?  accidental layering? a midi cascade function for using multiple 
modules together?) or just a software malfunction (reset it).

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Thanks Scott, let me play around with it and see what I can find.  
It's been a couple of years since I looked at it -- I remember trying 
a lot of things back then, but maybe not the specific right thing.

Cheers,

Fred

--- In vintagesynthrepair@yahoogroups.com, "Scott Nordlund" 
<gsn10@...> wrote:
>
>> Typically this isn't caused by a hardware issue, probably all 
sounds are 
> generated on a single IC, if something goes wrong it just all dies 
at once 
> rather than losing polyphony.
> 
> It's likely either a poorly-chosen setting (multitimbral allocation 
of 
> voices?  accidental layering? a midi cascade function for using 
multiple 
> modules together?) or just a software malfunction (reset it).