Yamaha TP3323 Manual do Proprietário - Página 11

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1. Pedal Adjustment

Replacing the Head

Loosen tuning bolts alternately and remove the

bolts.

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 ped-

al to suddenly move, posing a great danger.

We recommend that you mark the pedal side

of the hoop with a piece of tape, etc. so that the

hoop can be reattached to the same position.

Pedal

Remove the hoop and head together. 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.

* Be careful not to make any scratches in

the edge tape attached to the kettle's edge.

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

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.

The maximum head life normally is approxi-

mately 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 fol-

lowing 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.

We recommend replacing the head every year.

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