Operating Manual - nX, nXe, and nXp Power Amplifiers
52
14 nX AMPLIFIER TROUBLESHOOTING
No AC Power
1) Is the detachable AC power cord properly installed? Is it plugged into a known live outlet?
2) Has the power switch been disabled? (sec
4.7
,
9.4a
,
10.2
)
3) Is the Power-On Delay time set high? (sec
3
,
9.2c
)
4) Is the amp asleep?
(sec 4.6)
No Amplifier Output
1) Is the amplifier in Standby Mode? (sec
4.7
,
6.3
,
9.4a
,
10.1
)
2) Is there signal getting to the amplifier?
3) Is the input signal properly wired
(sec 2.2)
?
4) Are output connectors properly wired
(sec 2.3
,
5.6)
5) Are front panel, remote control, or software attenuators turned down?
6) Is the amp channel muted from within the control surface, DSP section, remote control, out-
put mixer, or event scheduler?
7) Are dynamics or gain tool settings in the DSP section allowing signal to pass properly?
8) Is the signal properly routed to the desired output in the DSP Matrix Router?
(sec 9.4d)
9) Is the fader level set properly in the DSP Matrix Mixer?
(sec 9.4d)
10) If using a DSP crossover on the outputs, are the filter frequency settings correct?
11) Did the event scheduler mute an output, change a preset or output channel source?
(sec 9.4g)
12) Is the Amplifier in Protect Mode? see below, or
(sec 4.6)
Protect LED is On
1)
Does the amp still function
, (fans still running)? If so, this means that one or more channels
of the amplifier are applying live countermeasures to compensate for an overheated, overpowered,
or rail fault condition, and the amp will continue to operate in a reduced capacity until the fault
condition is no longer present. Countermeasures include automatic attenuation of overheated or
overpowered channels, and power supply treatments for rail fault irregularities.
2)
Has the amp shut down
(fans stopped) with Protect, Sleep, and Power Switch LEDs all on? If
so, this indicates a critical situation where a failsafe fault condition has been tripped, latching the
amplifier into its shut-down state until power is cycled. These conditions may be due to internal
component failure, so
before cycling the amplifier power, first disconnect all speaker loads
. The
three failsafe fault conditions are indicated as follows:
A) High Rail Fault - If Protect, Sleep, and Power LED are on
and
one or more channel's Clip/
Mute LED is on, there is a power supply overvoltage condition on the indicated channel(s).
B) DC Output Fault - If Protect, Sleep, and Power LED are on and one or more channel's Clip/
Mute LED
and Signal LED
is on, there is a DC Output Fault on the indicated channel(s).
C) High Temperature Fault - If Protect, Sleep, and Power LED are on and one or more chan-
nel's Clip/Mute LED
and Temp LED
is on, there is a high temperature fault on the indicated channels
that could not be compensated for using countermeasures.
In all cases, if the Protect, Sleep, and Power Switch LED remain on after cycling power, the
amp requires servicing.
Clip/Mute LED Stays On
1) Is the front panel level control, Remote DC Level, or software control surface fader fully off?
2) Is the amplifier muted from software, a remote control devices, or an event scheduler action?
Attenuators Don't Work
1) Are the front panel or remote attenuators disabled? (sec
4.4
,
9.4a
)
Amplifier Not Recognized in Protea
ne
Software
1) Is the PC successfully communicating with the network?
(sec 8)
2) Is the amplifier successfully communicating with the network?
(sec 8)
3) Does the amplifier name appear as green text in the Ashly Network device tree?
(sec 9.1a)
