Roland VCF VCA 80017A and 5534A Dilemma


Is your Roland Juno 106, Roland MKS-30, Roland HS-60, Roland GR-700, or Roland MKS-7 not working properly and in need of a fix?  Does it suffer from filter issues or hanging notes?  VCF or VCA problems?  If so, you need to read this.

Yamaha CS-80 Bulletin 18

Yamaha CS-80Regarding the Combosynthasiser, when the Brilliance of Touch Response is at maximum, to avoid unusual Vibration of IC (iG00150) the following alterations are made..

Yamaha CS-80 Bulletin 46

Yamaha CS-80In some cases, it has been found that there is a certain amount of reduction in the attenuation pitch in SUS 1 LONG in the CS-50, 60 and 80 component synthesizers.

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Yamaha CS-80 Bulletin 58

Yamaha CS-80Changing the constants of resistors of Conversion Control IC (IG00151) to improve adjustment – work efficiency.

Yamaha CS80 Service Bulletin 96

Yamaha CS-80In the CS-80 Polyphonic Synthesizer, the pitch of a low-frequency sound may fluctuate when keys of low- and high-pitched sounds are depressed simultaneously. If this happens, take the actions described below.