Troubleshooting - Yamaha YEP-842S Owner's Manual

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.
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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.