The man to speak to about all things CS50/60/80 here in Uk is Kent Spong - he's on the group.
Give him a shout and I'm sure he will have some good advice.
Si
--- In yamahacs80@yahoogroups.com, "lucidsound" <lucidsound@...> wrote:
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> Greetings!
>
> As this is my first post, I guess I should introduce myself. I am a repair tech based in the South-West UK, dealing for the last 15 years with mostly analogue synthesisers from the 1970's and early 1980's for a variety of customers.
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> Currently I have a CS-50 and a CS-60 here for restoration. I'm fortunate enough to have a plentiful supply of CS-60 spares including complete voice cards, sliders, caps and even a complete programmer section.
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> However, the CS-60 has a problem with the Pitch Ribbon. I noticed that it was having no effect at all, so I removed it, simply by pushing it gently upwards out of the panel. It then fell apart into several pieces, as no screws were holding it together. I'm guessing someone has been in here before ;-}
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> So in front of me I have the velvet cover (good), a resistive track with four terminals (also good), the plastic shell in two halves, and a long coil spring. I'm guessing when you press down on the velvet, the spring should make contact with the track at that point.
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> What I can't figure out is how the force of a finger on the velvet is transferred to pushing the spring down onto the track, as the spring is held tight in the shell. I presume there should be some other component that runs the length of the ribbon under the velvet (providing the ridge) but still can't see how this can work when the ribbon assembly is in the panel and the two halves of the plastic case are pushed together. Or am I mistaken in how this works?
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> Are there any photos or diagrams in existence of how the ribbon components should go together?
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> Any help would be most appreciated.
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> Lucidsounds.
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