39
1 LED Tests
1.1 Apply AC main to the MSA12X loudspeaker
input panel and check LED 1 for a solid green as
shown in fi gure 33.
Figure 33
2 Audio Tests
2.1 Perform set up procedures 19 through 32.
3 Rub and Tick Tests
3.1 Remove the two top screws on both end caps
of the MSA12X loudspeaker indicated by arrows in
fi gure 34.
3.2 Remove the grille and grille retainers.
3.3 Apply a 100mv, 80Hz sine wave signal to the
MSA12X loudspeaker. Use either Dante digital audio
fi le from the computer or analog audio using a signal
generator. Gently apply fi nger tips to each driver.
There should be no extraneous noises such as
rubbing, ticking or scraping.
4 Frequency Sweep Test
4.1 Perform set up procedures 19 through 32.
4.2 Apply a 20mv signal from either Dante digital
audio fi le from the computer or analog audio using a
signal generator. Sweep the frequency from 58Hz to
18KHz.
Figure 34
4.3 There should be no extraneous noises such as
rubbing, ticking or scraping, if so replace the defective
driver .
5 Air Leak Test
5.1 Perform Set up procedures 19 through 32.
5.2 Apply a 70mv, 80Hz, sine wave signal to the
MSA12X loudspeaker. Use either Dante digital audio
from the computer or analog audio using a generator.
5.3 Listen carefully around all gaskets, end cap areas
and joints for air leaks.
6 Reinstall the Grille
6.1 Apply a 20mv, sine wave signal from either Dante
digital audio fi le from the computer or analog audio
using a signal generator. Sweep the frequency from
58Hz to 18KHz. Insure the grille does not vibrate
or rattle. If there is vibration or noise from the grille,
reapply butyl rubber gasket material.
TEST PROCEDURES
roivaheBnoitcnuFDEL
LED #1 Status/Fault LED Solid green: Power on, system OK
Solid or blinking red: System fault
Blinking green: Identify module, ¿Umware update
LED #
2
Analog audio signal present
Green: Signal present
Yellow: Limiting
Red: Clipping
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