Yamaha CS20M - Drifting VCO and Memory Fail

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Yamaha CS20M - Drifting VCO and Memory Fail

Postby winningatlife » Wed Apr 29, 2009 11:29 pm


I can not find ANYBODY who knows much of anything about the CS20M - It works just fine, sounds great, BUT, VCO 2 is a bit drifty for the first 30 min its on...

AND, the memory function no longer works.

Anybody ever worked on one of these beasts?

Some keys I have: Yamaha CS20M, ARP Axxe, Chroma Polaris, Roland Juno 60, Vermona DRMMKII, Roland R8, Sequential Circuits Pro-One, x0xbox, Terratec MB 33 II Superbass, Kurzweil SP88.
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Posts: 45
Joined: Wed Apr 29, 2009 10:58 pm
Location: Los Angeles
Real name: Ryan
Gear: Yamaha CS20M
Arp Axxe
Juno 60
Sequential Circuits Pro-One
Vermona DRMMK2
Roland R8
Kurzweil SP88
Chroma Polaris
Band: Agape

Re: Yamaha CS20M - Drifting VCO and Memory Fail

Postby Steve Jones » Thu Apr 30, 2009 12:47 am

There is a battery compartment on the underside on the synth if you turn it over, have you tried changing the batteries?
Synthesizer service tech since 1982.
Synth parts and service, Sydney Australia.
Steve Jones
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