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Operating Manual - nX, nXe, and nXp 150W/75W Power Amplifiers
4.6 Amplifier Status LEDs
PROTECT
-
The red Protect LED initially turns on to indicate that real-time countermeasures are being applied for power
limiting, overtemperature, or power supply voltage fault conditions while the amp is still running. If those countermeasures are unsuc
-
cessful, the Protect LED indicates an amplifier shut-down. If the amplifier shuts down due to self protection, the power must be cycled
before resuming normal operation. See
section 14
for details
.
SLEEP
-
This blue LED indicates that the amplifier is asleep. Sleep mode can be enabled as a power saving feature that
shuts down most amplifier circuits after a period of audio inactivity, reducing the amplifier's power consumption to less than 1 Watt.
The amplifier is awakened when there is audio signal present again, or when the power switch is pressed. Because the real-time-clock
is also shut down during sleep mode, the amplifier cannot be awakened by any software function, including the event scheduler.
Sleep mode is normally disabled, therefore must be enabled by the user. On nX series, the sleep clock timer is fixed at
30 minutes, and is enabled by toggling through the four mode conditions of the factory reset switch as detailed in
section 4.3
.
On networked nXe and nXp series, the sleep clock timer also defaults to 30 minutes, but is programmable under [Device Op
-
tions] with a range of 1-120 minutes. In all models, the presence of input signal above -24dBu (0.05Vrms) or pressing the power
switch will return the amplifier to normal operation.
Note that on all models, a fixed amplifier turn-on delay of three seconds is
necessary to manage in-rush current during power-up or waking from sleep
. Sleep mode has priority over standby mode.
DISABLE
-
This yellow LED lights when the power switch and level controls have been disabled. All external controls
are disabled together using the factory reset switch as described in
section 4.3
, or in software using the amplifier's main control
surface
(see section 9.4a)
.
COM
(nXe and nXp only) - This green LED lights whenever network communication occurs. Secondly, the COM LED
flashes for two seconds when the <Identify Device> software button for that device is clicked.
(see section 9.1i)
Lastly, the COM LED
becomes lit (along with the flashing power switch LED) during flash reprogram mode (see section 9.1h).
4.7 Power Switch/LED
–
This switch is used for powering the amplifier on or off or waking the amplifier from sleep. The
white switch LED lights solid when the amplifier is on, and flashes when in standby mode (nXe and nXp only). The power switch
can be disabled using the factory reset switch actions described in
section 4.3
, or disabled from software (nXe and nXp only). The
three possible power switch LED conditions are:
1) Fully lit: The amplifier is powered up, even if the power switch has been disabled, in which case the disable LED will be on.
2) Flashing: The amplifier is in standby mode, or is in flash reprogram mode when the COM LED is also lit.
3) Fully off: The amplifier is either completely off, or it is in sleep mode, in which case the blue sleep LED will be on.
4.8 Series and Model Labels
– The label on the left indicates the amplifier series, nX, nXe, or nXp. The label on the
right shows the amplifier model name.
