Yamaha CS80

Hi Doug,

Long story short : if you are pretty good with the soldering iron I  
would start replacing the 4000 series CMOS chips , make sockets and  
put additional bypass capacitors. Replace systematically all  
capacitors starting with the power supply. That way you could rest  a  
sure that the Yamaha custom chips are a bit out of the danger zone.
How ever this is not a ten minutes job . Take your time as it is  
worth the work and effort. If you have questions we are glad to help  
you.

Kind Regards

Csaba Zvekan


On Feb 20, 2011, at 8:42 AM, effegee wrote:

> Hi. I'm new here. I just acquired a CS-80 that originally belonged  
> to Oscar Peterson, who sold it when he put together a Synclavier  
> system. The guy I bought it from has played on records for Bon  
> Jovi, Aerosmith, the Cult, Scorpions, etc. He had the CS-80 for 16  
> years, keeping it in the studio and storage, and never once had it  
> tuned. I'm amazed, because the tuning sounds great. There is one  
> dead (or barely audible) voice on Ch. I, but everything else seems  
> in working order, and it sounds great. This is the first CS-80 I've  
> ever played and I'm having fun exploring is sonic and expressive  
> possibilities. I'm planning on having a synth tech a few hours away  
> in Seattle work on the dead voice and tune it, and I'm looking at  
> having the Kenton MIDI installed (though I don't know how I feel  
> about drilling into the beautiful front panel to install switches--  
> we'll see).
>
> I also own an Arp 2600, the internals of which I had overhauled by  
> an Arp specialist (Cirocco). When I go it, the Arp's enclosure was  
> so water damaged and the hinges & corners so rusted that I had to  
> have a new enclosure made for it. Fortunately I have a woodworking  
> friend who replicated the original enclosure out of plywood and I  
> tolexed it (using the old tolex as a pattern), and put on the  
> corner/hinges/handle hardware, hand-setting every rivet. That was a  
> huge, weeks-long project, but I learned a lot about tolex, rivets,  
> hard-to-find case hardware, and people that shamelessly lie to you  
> on eBay about what they're selling you. In the end, I have the most  
> mint (if not original) cases for an Arp 2600 in existence. If only  
> it could hold it's tuning as well as the CS-80�
>
> So, back to the CS-80: I'm somewhat concerned. With all of the  
> reading I've done here and on the net about replacing parts, etc.,  
> I feel like I'm sitting on a time bomb. Is my CS-80 going to just  
> stop working one day? I understand that there are aging components,  
> but I don't know what I need to do right now for a unit that seems  
> to be functioning well. It seems that I should have the power  
> supply refurbished (Circuit Solutions kit) based on what others  
> have written, but what about the other stuff? Should I wait until  
> something breaks before I have it fixed? Or is there potential for  
> worse damage if I don't do something now? I want to do what's best,  
> yet avoid overkill.
>
> I'm glad to be here. Thanks for letting me share.
>
> Doug
>
> 



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