Care And Maintenance; Maintenance Information; Testing Procedure; Check Of Transducer And Enclosure Acoustic Behavior - L-Acoustics KUDO Multi-Mode WST Manuel D'utilisation

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CARE AND MAINTENANCE

CARE AND MAINTENANCE CARE AND MAINTENANCE CARE AND MAINTENANCE
8.1

Maintenance information

®
The L-ACOUSTICS KUDO
sound reinforcement applications. To fulfill such demanding conditions, L-ACOUSTICS
high-grade and reliable components:
•
Weather-resistant transducers.
•
Baltic birch plywood cabinet.
•
Polyester-coated steel grill covered by a non biodegradable "Airnet" fabric.
•
Oxidation-resistant screws and rigging points.
However, in order to ensure product performance and safety, it is essential to frequently inspect the KUDO
and its internal components. These checks need to be done on a regular basis depending on the conditions of system
use. The testing procedure consists of three steps as described in section 8.2. If a transducer needs to be repaired or
replaced, apply the corresponding procedure in section 8.3.
8.2

Testing procedure

8.2.1

Check of transducer and enclosure acoustic behavior

Connect a sweep frequency generator to the active input of the LA8 amplified controller. Apply a sweep from 35 Hz to
20 kHz with a maximum voltage of 0.2 volts (-12 dBu, -14 dBV): the sound should remain pure and free of any
unwanted noise. If not, check the mechanical assemblies and, if necessary, contact an L-ACOUSTICS
representative to repair or replace the damaged components (see also section 8.3).
!
0.2 volts is a maximum value that can generate very high sound levels at given frequencies.
Use ear protection to set the sound level before testing.
WARNING
Whenever a transducer is reconnected, ALWAYS check its wiring polarity using a phase checking device.
!
If it is out of phase, invert the cables connected to its electrical sockets. The connecting procedures are
given in section 8.3.
IMPORTANT
8.2.2

Check of mechanical assembly and rigging parts

Inspect the general aspect of assembly and check that screws are locked tight (on rigging elements, loudspeakers,
diaphragms, grills, rear plate, and top hatch). Check the quality of contact and locking action of the PA-COM
Also check the integrity of mobile parts (ball locking pins, rotating arms, K-LOUVER
of deformation, fissure, or corrosion). If necessary, contact an L-ACOUSTICS
damaged components.
8.2.3

Check of external aspect

Remove the dust from the front fabric with a vacuum device. If needed, repaint the cabinet.
If paint is applied, protect the mechanical parts.
!
Do not apply paint to the front grill fabric as it could fill the fabric holes and deteriorate the acoustic
transparency of the material.
IMPORTANT
KUDO_UM_ML_2-0
®
enclosure is a technical product designed for various, intensive indoor and outdoor
w w w . l - a c o u s t i c s . c o m
®
has designed the KUDO
®
) and of rigging elements (no signs
®
authorized representative to replace the
®
with
EN
®
cabinet
®
authorized
®
sockets.
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