Yamaha YBB-841 Посібник користувача - Сторінка 18
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Troubleshooting
Tone is not clear and pitch is poor.
• Th e valve felt or cork is damaged.
Replace the felt or cork with a new one.
• A large amount of dirt has accumulated
inside the instrument.
Wash it out.
• Th ere is a large dent in the tubing or air is
leaking. Or the mouthpiece is loose and air is
leaking from around the mouthpiece.
Contact the dealer from whom you pur-
chased the instrument.
No sound.
• Th e holes in the pistons are not aligned with
the holes in the valve casings.
Make sure that the number stamped on the
piston matches the number stamped on the
valve casing.
Th e valves are sluggish.
• Dirt has accumulated between the pistons
and valve casings.
Clean the inside of the valves.
• Dust has scratched the inside of the valve
casings.
Wash out the dust as soon as possible.
• Dropping or hitting the piston has damaged
it.
Never use the instrument with a damaged
piston. Contact the dealer from whom you
purchased the instrument.
• Th e pistons or valve casings are corroded.
Contact the dealer from whom you pur-
chased the instrument.
Th e rotors are sluggish.
• Dirt has accumulated between the rotors and
valve casings.
Oil the lever mechanisms with lever oil.
Contact the dealer from whom you pur-
chased the instrument.
18
Th e valve slide is stuck and cannot be
removed. Th e slide is sluggish.
• Th ere is dirt or dust inside the slide.
Th oroughly remove dirt and apply some
slide grease that matches the type of slide.
Or apply some tuning slide oil to the slide.
• Dropping or hitting the slide has caused a
dent, or the slide was bent while cleaning.
Contact the dealer from whom you pur-
chased the instrument.
Th e screw is too tight and cannot be
removed.
• Th e screw is corroded.
• Hitting the instrument has damaged the
screw.
Contact the dealer from whom you pur-
chased the instrument.
Air does not pass through the instru-
ment.
• Th e piston is in the wrong valve casing.
Set the piston into its proper valve casing.
Th e mouthpiece cannot be removed.
• Th e instrument was dropped or hit with the
mouthpiece attached. Or, the mouthpiece
was inserted with too much force.
• Th e instrument has been left for a long
period of time with the mouthpiece inserted
in the instrument.
Contact the dealer from whom you pur-
chased the instrument.
Th e instrument makes an abnormal
sound when played.
• Solder on the instrument has come loose, or
a foreign object is in the pipe.
Contact the dealer from whom you pur-
chased the instrument.