dB Technologies DigiPro OPERA D Series Panduan Pengguna - Halaman 6
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CHARACTERISTICS AND PROTECTION
Front Grille
The speakers's components in the box are protected by 1.2mm metal steel grille
version)
and by 1.5mm metal steel grille
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.
Front LED
On the front of the speaker a blue LED indicates the state of the speaker.
During normal operation the speaker front LED can be disabled if necessary (theatre,
cinema installations)
To change the state of the front LED, press and release for several times (6 times) the
MODE switch during switch on, when all the LEDs ( Limiter , Signal and Ready ) on the
amplifier module are off.
To restore front LED operation, repeat the operation.
The diagnostics of the speaker provided by this LED, is still active even if the LED is
disabled.
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 blue front LED flashes twice and 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.
The speaker switches to "mute".
Failure indications and safeties
The microprocessor is able to signal three different kinds of failure by flashing the "Limter"
red LED on the amplifier panel before the lighting up of the "Ready" green LED. The three
types of failure are:
1)
WARNING: a non severe error or auto-ripristinate malfunction is detected and the
performance of the speaker is not limited
2)
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 centre to solve the issue.
3)
FAILURE: a severe malfunction is detected. The speaker switches to "mute".
Flashing
1 or 2
3 or 4
from 5 to 8
In case of failure, the "Ready" green LED remains off.
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Indication
Warning
Limitation
Failure
(10",12" and 15" versions)
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covered by foam on
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