Yamaha YEB-201MS Manuale d'uso - Pagina 19

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Th e piston makes a metallic sound

when moved.

• Th e felt is torn or lost.

 Replace the felt with a new one.

• Th e screws on the piston valve or valve casing

are loose.

 Firmly tighten the screws.

• Th e piston shaft is bent.

 Contact the dealer from whom you pur-

chased the instrument.

Th e rotor lever makes a metallic sound

when moved.

• Th ere is contact or scraping with the lever's

springs.

 Oil the lever mechanisms with lever oil.

• Th e lever comes into contact with the pipes.

 Contact the dealer from whom you pur-

chased the instrument.

• Th e screws are loose.

 Firmly tighten the screws.

• Th e rotor and valve casing have come loose.

 Contact the dealer from whom you pur-

chased the instrument.

Water leaks from the slides.

• Not enough grease.

 Apply grease to the slides.

Troubleshooting