PSR-550 2 IMPORTANTNOTICE ThismanualhasbeenprovidedfortheuseofauthorizedYamahaRetailersandtheirservicepersonnel.Ithasbeenassumed thatbasicserviceproceduresinherenttotheindustry,andmorespecificallyYamahaProducts,arealreadyknownand understoodbytheusers,andhavethereforenotbeenrestated. ...