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Likewise, if the surveillance circuit detects the
presence of DC at the output terminal, the
amplifier will shut down too. Here, the blue LED
blinks at a 0.5s (quick) rate. Unallowable DC
voltages can origin from the source component
or the ALLEGRO amplifier itself. To isolate the
source of the problem, disconnect the audio
input cable from the ALLEGRO amplifier before
proceeding any further.
In case the amplifier has shut down and the
front-panel status LED is blinking, the front-panel
switch will be inoperative. In order to revert to
normal operation, the fault cause must be
rectified. There after, one has to cycle the rear
mains switch from (1) to (0) and then back to (1)
again.
If the error message persists, the amplifier hasn't
cooled down sufficiently, or the unit itself is faulty.
If the DC error only shows up, when the source is
connected, the source component is faulty. In
both cases consult your dealer.
An
overcurrent
condition
is
monitored
permanently. If the output current to the
loudspeakers exceeds 25A the amplifier limits
power
dissipation
in
the
MOSFET
output
transistor to safe levels, protecting speakers and
the amplifier.
9
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