Daktronics SPORTSOUND 1500HD, Installation Manual

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Troubleshooting
15
6 Troubleshooting
This section lists potential problems with the system, indicates possible causes, and
suggests corrective action. This list does not include every possible problem, but it does
represent some of the more common situations that may occur.
Note: Be sure to power on the audio control rack, fiber conversion box, and cabinet
breakers. Make sure all connections from source to the cabinet are intact.
Symptom/Condition Possible Cause Solution/Items to Check
No power to audio cabinet;
green indicator light is off on
bottom of control enclosure
Breaker is off at sign Turn breaker ON.
Bad power supply
Order a new power supply
(part # A-2238).
No audio from cabinet, but
signal can be heard through
headphones or a monitor
speaker
No power at cabinet Turn breaker ON.
Fiber conversion box is
unplugged from wall outlet or
cable to audio control rack
Plug in fiber conversion box
power/signal.
Analog signal out of the
mixer is not being correctly
converted to a digital signal
Set the fiber box ANALOG
BACKUP switch ( Figure 30 ) to
ANALOG and see if problem
goes away.
No fiber connection to
cabinet; fiber link down
Verify the Port 1 (100M) LED on
the media converter is solid
green ( Figure 28-2 ).
Swap TX-RX fibers to fix link.
Replace fiber splice, repair
fiber termination/cable.
Isolation transformer failure
(ANALOG BACKUP enabled)
Check the isolation transformer
in the control enclosure. Refer
to the Isolation Transformer
Troubleshooting Guide
(DD3417357) , located online at
www.daktronics.com/manuals .
Muffled audio from cabinet
(but clear though headphones
or a monitor speaker)
Bad digital connection
Open CobraNet Discovery
and check for errors. Refer to
System Testing (p�17) .
Bad driver or amplifier
Perform a system check via
Monitor Application. Refer to
System Testing (p�17) .