dB Technologies LVX 8, Руководство пользователя

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LVX WHITE Professional Active Speaker
11
ENGLISH
3. CHARACTERISTICS AND PROTECTION
Front Grille
The speakers’s components in the box are protected by 1,2mm (LVX 8 WHITE and LVX 10
WHITE) or 1,5mm (LVX 12 WHITE and LVX 15 WHITE) metal steel grille covered by foam on
backside.
Cooling
Thermal control is provided by the internal microprocessor which, by means of two sensors,
controls the temperature of the amplifier and of the power supply, avoiding overheating by limiting
the overall volume.
In case of overheating (> 80 degrees) the volume decreases proportionally to the temperature
increase, making the change unnoticeable.
The correct volume and all the functions are automatically restored when standard operating
temperatures are reached.
Switch on
The amplifiers are equipped with a microprocessor to control the DSP and the amplifier.
The correct switch on of the amplifier is ensured by an initialization procedure; during this test
stage, the LEDs (“Limiter”, “Signal” and “Ready”), located on the amplifier module, remain off for
approx. 2 sec.
At the end of the switch on procedure, the front LED lights up (if enabled) and on the amplifier
module the “Ready” green LED only remains steadily on.
In case of severe failure of the speaker, the LED on the front panel flashes several times and on
the amplifier module, the “Limiter” red LED flashes and the speaker switches to “mute”.
Failure indications and safeties
The microprocessor is able to signal three different kinds of failure by flashing the “Limiter” red LED
on the amplifier panel before the lighting up of the “Ready” green LED. The three types of failure
are:
- WARNING: a non-severe error or auto-restore malfunction is detected and the
performance of the speaker is not limited
- LIMITATION: an error is detected and the performance of the speaker is limited (the
sound level is reduced by 3dB).
- This does not affect the operation of the speaker since it continues to operate. However,
it is necessary to call the service center to solve the issue.
- FAILURE: a severe malfunction is detected. The speaker switches to “mute”.
Flashing Indication
1 or 2 Warning
3 or 4 Limitation
from 5 to 8 Failure
In case of failure, the “Ready” green LED remains off.
Perform the checks listed below:
- Check if the speaker is properly connected to the power supply.
- Make sure that the power supply is of correct voltage.
- Check that the amplifier is not overheated.
- Disconnect the speaker from the mains power supply, wait for a few minutes and
connect it again.
If after these tests the red “LIMITER” LED is still on, please contact an authorized service center.