“Up for auction is one Yamaha CS-20m synthesizer from 1979 in great condition!! The synth works great and sounds fantastic. Unlike some other synths of the era, you can store up to eight presets right on the board, which is AMAZING for an analog synth. Sure helps when you spent a lot of time dialing in a cool sound and want to retain it for later use. I’ve tested the memory preset buttons and all the knobs and sliders. The CV Gate function works (really cool), (used my korg kr 55 for that). Did not test the tape storage function but see no reason why that shouldn’t work as well, the synth is in great condition. The two very minor issues are: the LED light on preset #5 is not working, but this does not affect the ability to save a preset on button five and the sustain slider cap is broken off, but this does not affect the function of the sustain, although you may want to replace the slider if you want to put the slider cap back on. I am selling this baby because I don’t use it very much and need to raise money for a car. ” Link
“All keys are in good shape and have been removed and cleaned. All pivots lithium lubricated. Power supply fully recapped with Xicon capacitors and voltages adjusted. All pots cleaned, no noisy audio path. The VCO’s and pitch wheel have been carefully scaled so please leave them alone. Memory storage works fine. Did not test the cassette patch download/upload interface but no reason to think it would not work as everything else does. Someone left batteries in the holder underneath which corroded so it has a new 2xAA holder. The corrosion was not kind to the cover plate, but that and the holder was the only casualty of that oversight by someone.
There are a few nicks on the wood, but there is one nasty scratch, and one corner is dented as shown in the photos. Other than that, it’s in surprisingly good shape as the CS series wood panels didn’t take road abuse very well (I toured with a new CS-40M back in the day). Happy to send some close-ups if you wish. Honestly, the graphics and paint are in remarkably fine shape over the entire synth (other than the scratch, not done by me), as are the knobs and sliders. It really is a fine specimen in general.
And it sounds great!!! Ballsy, synthy goodness. Would love to keep it but I just can’t justify it with a recent Prophet purchase and the wife’s reaction to same. No power cord, but it’s just the usual 3-pin variety found on every computer and monitor ever made. Owner’s and tech manuals readily available on the web, will send you what I downloaded and printed out with the unit. ” Link
“Biete hier ein altes Yamaha Keyboard CS-20M an
Technisch zeigt das Gerät beim einschalten leider keine Funktion, gehörte meinem Bruder der ausgezogen ist und ich kenne mich mit dem Gerät nicht aus
Optisch sieht das Keybord (müsste mindestens ca. 30 Jahre alt sein) aber noch recht gut aus, etwas Staub und Schmutz hat sich am Bedienfeld angesammelt
Der Zustand ist dennoch gebraucht und der Verkauf ist als defekt
Habe aber ein paar Foto’s gemacht ” Link
“Der Synthesizer ist voll Funktionsfähig!
Er ist jetzt 31 Jahre Alt!
Zur Ausstattung:
-Analog
-Mono
-2x VCO
-Mixer mit Noise
-VCF + EG-VCF
-VCA + EG-VCA
-1x LFO
-8 Speicherplätze
-Modulationsmöglichkeiten
-3 Oktaven-Klaviatur
Ich lege ihm ein neues Outputkabel auf 6,3mm Klinke dazu (3m).
Stromkabel ist dabei.
Er hat einen brillianten Klang mit enormen Druck!
Äußerlich ist er für sein Alter in einem recht guten Zustand. Leider hat er ein paar kleine Lackplatzer die etwas Rost gefangen haben in der nähe des Pitch- und Modulationsrad.
Mit dem Erwerb dieses Synthesizers ist noch ein Transportkoffer in dem er geliefert wird beinhaltet.
Versand ist möglich, dennoch rate ich zu einer Abholung. Versandkosten variieren je nach Strecke, weil er sehr schwer und groß ist (35kg mit Koffer).
Ich wünsche viel Spaß beim Bieten.” Link
“One of the Yamaha CS series this one in VG+ condition with a few scratches especially on bottom front panel cosmetics are excellent works perfect. Local pick-up in Los Angeles CA area preferred, weighs A LOT.” Link
“The only minor damage is a small scuff on the corners of the woodgrain and a small dent on one of the inputs in the rear of the machince (both can be seen in the pictures and neither affects the playability of the instrument). If you are looking for an instrument that you can plug in and use and look cool while doing so, this is your synth.” Link 
