Yamaha Trombones Owner's Manual - Page 15

Troubleshooting Tone is not clear and pitch is poor. • A large amount of dirt has accumulated inside the pipe. ➞ Wash out the pipes. • There is a large dent in the pipe and air is leaking from a pipe seam. • The mouthpiece is loose and air is leaking from around the mouthpiece. • The holes in the rotary valve and valve casing are not aligned. ➞ Contact the dealer from whom you purchased the instrument. The slide does not move smoothly. • Dirt has accumulated between the inner and outer slides. ➞ Wash the inside of the slide. • The slide is bent. • There is a dent in the slide. ➞ Never use the instrument with a damaged slide. Contact the dealer from whom you purchased the instrument. The tuning slide is stuck can not be removed. The slide is sluggish. • Dirt or dust between the tuning slide and pipe has scratched the tuning slide. ➞ Thoroughly remove dirt and apply some slide grease that matches the type of slide. • Dropping or hitting the slide has caused a dent, or the slide was bent while cleaning. ➞ Contact the dealer from whom you purchased the instrument. The screw is too tight and cannot be removed. • The screw is corroded. • Hitting the instrument has damaged the screw. ➞ Contact the dealer from whom you purchased the instrument. The rotary valve is sluggish. • Dirt has accumulated between the rotary valve and valve casing. • The rotary valve lever linkage is bent. ➞ Contact the dealer from whom you purchased the instrument. • The string is loose. ➞ Re-attach the string. The mouthpiece cannot be removed. • The instrument was dropped or hit with the mouthpiece attached. Or, the mouthpiece was inserted with too much force. • The instrument has been left for a long period of time with the mouthpiece inserted in the instrument. ➞ Contact the dealer from whom you purchased the instrument. The 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 purchased the instrument. The rotary valve lever makes a metallic sound when moved. • The lever comes into contact with the pipes. ➞ Re-attach the string and adjust the lever's position. • Screws are loose. ➞ Firmly tighten the screws. • The rotary valve and valve casing have come loose. ➞ Contact the dealer from whom you purchased the instrument. 29