FUTABA 12K Instruction Manual page 73

(Note) When this parameter is large, the current consumption increases.
• Buzzer
When the power supply of a servo is previously turned on at the time of a power supply injection without
taking transmit of a transmitter, the buzzer sound of about 2.5 Hz continues sounding from a servo.
(Even when the transmit of a transmitter is taken out previously, a buzzer becomes until the signal of a
servo is outputted normally, but it is not unusual.)
The transmitter has been turned OFF ahead of a servo power supply → The buzzer sound of about 1.25
Hz continues sounding as servo power supply end failure alarm.
Do not insert or remove the servo connector while the receiver power is ON. A buzzer may
(
sound by incorrect recognition. )
＊ Buzzer sound is generated by vibrating the motor of a servo.
Since current is consumed and a servo generates heat, please do not operate the number more than
needed or do not continue sounding a buzzer for a long time.
<Functions of System Menu> 73