Yamaha TP-5000 Owner's Manual - Page 11

Replacing The Head 1 To prevent the pedal from being pulled down by the spring force, the heel of the pedal must be kept down (this can easily be accomplished by placing a piece of wood or a softball between the base and the pedal) while the tuning bolts are loosened alternately in the proper sequence. Softball etc. Caution Never put your hands etc. under the pedal. 3 Place the new head with the hoop on the kettle. When using a Yamaha timpani head, its YAMAHA logo must be on the side opposite the pedal. The hoop must be re-mounted in the same position as marked with cellophane tape in step 2. Tighten the tuning bolts alternately by hand until the head is tensioned slightly. At this time, make sure that head and hoop are centered on the kettle. Tighten each tuning bolt an additional 1/4 of a turn using the timpani key. Repeat at least 4 times. 4 Adjust the timpani as described on pages 4 and 5, "Before Using The Pedal Timpani", starting with step 5. For precise tuning, refer to the section "Adjusting The Sound Of Your Timpani" on page 6. 2 After removing all tuning bolts, mark the pedal side of the hoop with cellophane tape etc. and then remove the head together with the hoop. At this time, be careful not to lose any of the tuning bolts and prevent dust from adhering. Also, avoid touching the tuning bolt threads, as they are greased. Hoop Pedal Cellophane tape * Be careful not to make any scratches in the tape attached to the kettle edge. If the tape is peeling or badly damaged, it must be replaced with timpani edge tape (Teflon™ tape). G Interval For Head Replacement The maximum head life normally is approximately 2 years and depends on the frequency and duration of use. However, the head should always be replaced before the sound quality deteriorates dramatically. If a head is left on and used more than two years, the following problems may occur: • It may become impossible to tune the head to the proper pitch range. • It may become impossible to balance the pedal. • The main unit mechanisms themselves may become damaged. When the head is slightly tensioned and its surface looks wavy or shows dents, it is time to replace the head with a new one. 11