L-Acoustics LA8, Maintenance Manual

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LA8_MM1_EN_2.0
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Sound
Issue Possible causes Inspection procedure / Diagnosis
No sound and no error
message
(controller
not in standby
mode, refer to the LA
NWM video tutorial )
outputs muted 1.
Unmute the outputs.
wrong input mode 2.
If the fallback mode is ON, switch it OFF.
Select the input mode according to the audio
source format (analog or AES/EBU).
wrong preset selection 3.
Select a preset in accordance with the loudspeaker
system connected to the outputs.
gain value too low on the 4.
controller
Set an appropriate gain value on channels OUT1 to
OUT4.
If the AES/EBU input mode is selected, set an
appropriate AES/EBU input gain value.
audio source not plugged 5.
or plugged into the wrong
input connector
Plug and secure each XLR cable into the audio
source and the corresponding input connector on
the controller:
 Analog input connector for an analog audio
source.
 AES/EBU input connector for AES/EBU audio
source.
audio source cable 6.
incorrectly plugged
Unplug the XLR cable and plug it again on the audio
source and the controller.
audio source cable 7.
damaged
Replace the XLR cable.
wrong settings on the 8.
audio source
Set appropriate parameter values on the audio
source, in particular the output gain value (refer to
the
third party documentation ).
non-audio bit stream 9.
Verify that the AES/EBU source does not deliver
non-audio bit stream (e.g. encoded audio).
audio source failure 10.
Inspect the audio source for failure.
Reminder: A
digital audio source can meet the
following failures: no clock, loss of lock, invalid
audio (validity bit), CRC error, bipolar encoding
error, data slip.
loudspeaker not plugged 11.
or plugged into the wrong
output connector
Plug and secure each PA-COM ® or SpeakON ®
cable into the loudspeaker and the corresponding
output connector on the controller.
loudspeaker cable 12.
incorrectly plugged
Unplug the PA-COM ® or SpeakON ® cable and plug
it again on the audio source and controller.
loudspeaker cable 13.
damaged
Replace the PA-COM ® or SpeakON ® cable.
loudspeaker damaged 14.
If only one loudspeaker is connected, inspect it.
Otherwise, go to next step.
mains failure 15. Inspect the mains.
other cause 16. Contact L-ACOUSTICS ® .
continued on next page…