Yamaha TP-3123 Gebruikershandleiding - Pagina 11

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Replacing the Head

Loosen the tuning bolts on opposite sides of the

timpani.

Caution

Do not touch the pedal when loosening the tun-

ing 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 sud-

denly move, posing a great danger.

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.

Pedal

* Be careful not to make any scratches in the edge

tape attached to the kettle's edge. If the tape is peel-

ing or badly damaged, it must be replaced with Tim-

pani Edge Tape (TPT-100 Teflon™ tape).

Hoop

Cellophane tape

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 posi-

tion as marked with cellophane tape in step

the proper order, tighten the tuning bolts alter-

nately 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.

Adjust the timpani as described on page 6 "Initial

Preparation" starting with step

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 be-

fore 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.

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