YAMAHA PSR-270 OWNER'S MANUAL Pdf Download. wwwalslib››Electronic Keyboard›PortaTone PSR-270Summary of Contents for Yamaha PSR-270 Page 2 Yamaha. This product should be used only with the components supplied or; a cart, rack, or stand that is recommended by Yamaha. Yamaha PSR-270 User Manual - manualmachine manualmachine›Yamaha›PSR-270Yamaha PSR-270 User Manual. Size: 3 Mb. Download Congratulations on your purchase of the Yamaha PSR-270 PortaTone! You now own a portable keyboard that combines advanced functions, great sound and exceptional ease-of-use in a highly compact package. Its outstanding features also make it a remarkably expressive and versatile instrument.