Daktronics SPORTSOUND 1500HD GEN II, Руководство по установке

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Troubleshooting
17
Symptom/Condition Possible Cause Solution/Items to Check
Poor sound quality from audio
cabinet (distortion)
Poor source material (CD or
MP3 with heavy compression
or distorted material)
Use high quality audio files
(.wav).
Clipping audio at source
(audio control rack) output
Bring source level down below
clip.
Bad driver or amplifier Replace driver or amplifier.
Intermittent audio from audio
cabinet
Bad fiber connection
Set the fiber box ANALOG
BACKUP switch to ANALOG
and see if problem goes away.
Amplifier modules are over
driven into protect mode
Reduce source output level.
Bad amplifier module Replace amplifier.
Analog to Digital Converter (in
fiber box) failure
Replace analog to digital
converter.
Low level (-20dB)
(ANALOG BACKUP enabled)
Increase source output level
above -20dB.
Humming/buzzing from audio
cabinet
Ground loop
Disconnect ground at
isolation transformer in the
control enclosure. Refer to
Audio System Humming
Troubleshooting (DD3448287) ,
located online at
www.daktronics.com/manuals .
For more troubleshooting steps, refer to the appropriate audio control rack manual.
Indicator Lights
Control Enclosure
There is a green LED power indicator on the
bottom of the control enclosure as shown
in Figure 25 . This indicates whether there is
power feeding the control enclosure properly.
The indicator stays lit when there is power;
otherwise, it will be off.
Audio Control Rack
Refer to the troubleshooting section of a specific audio control rack manual for more
information about the indicator lights that show signal output to the audio cabinet.
Fiber Conversion Box
Within the fiber conversion box, if included, indicator lights on the equipment help verify
proper connection with the sound cabinet.
Figure 25: Control Enclosure Power Indicator