Yamaha TP-3123 Owner's Manual - Page 11
Replacing the Head
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Replacing the Head 1 Loosen the tuning bolts on opposite sides of the timpani. Caution Do not touch the pedal when loosening the tuning bolts (loosening the head). Also, never place your fingers or foot into space under the pedal, around its base, or its moving parts. Changes in spring tension can cause the pedal to suddenly move, posing a great danger. 2 After removing all tuning bolts, mark the pedal side of the hoop with cellophane tape, so that the hoop can be re-mounted in the same position as it was prior to removal. Remove the head together with the hoop. Be careful not to lose any of the tuning bolts and prevent dust from adhering to them. Also, avoid touching the tuning bolt threads, as they are greased. Hoop Pedal Cellophane tape * Be careful not to make any scratches in the edge tape attached to the kettle's edge. If the tape is peeling or badly damaged, it must be replaced with Timpani Edge Tape (TPT-100 Teflon™ tape). 3 Place the new head with the hoop on the kettle. When using a Yamaha timpani head, make sure its YAMAHA logo is on the side opposite the pedal. The hoop must be re-mounted in the same position as marked with cellophane tape in step 2. In the proper order, tighten the tuning bolts alternately by hand until the head is tensioned slightly. At this time, make sure that the 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 page 6 "Initial Preparation" starting with step 5. For precise tuning, refer to the section "Adjusting the Pitch" on page 8. ● 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