Daktronics DXB Series, Service Manual

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Test and Replace Display Components
14
6 Test and Replace Display Components
Test a Module
Module Status Indicators
Under normal operation, module indicator LEDs (one on each side on the back of the
module) should flash once every two seconds. Refer to Figure 22 .
Note: When troubleshooting, the module may take up to eight seconds to change the
pattern.
Perform a Module Self-Test
If a module is blank, but has power supplied to it,
perform a module self-test to diagnose a module
or SATA cable failure. To perform a self-test, follow
these steps:
Visit
youtu.be/M61KEMAOdaM to view a video
about performing a module self-test.
1� Attach a SATA cable to Port A and Port B on
the module. Refer to Figure 22 .
2� Disconnect the power to the power supply for
10 seconds.
3� Reconnect the power to start the self-test.
4� Verify the module is running a self-test.
Remove the SATA cable and cycle power to the
module to stop the self-test.
For more information, refer to
Performing a Daktronics Digital Billboard Module Self Test
(DD1944805) in Appendix A: Reference Documents (p�25) .
Replace Module Power Supplies
The power supply provides power
from the term panel to the module.
For DXB series digital billboards, the
module power supply is located
on the uprights. Each power supply
typically controls four modules.
1� Disconnect the power coming
from the term panel to the power
supply.
2� Disconnect the power cables
from the power supply to the
modules. Refer to Figure 23 or
Figure 24 .
3� While holding the power supply
against the upright, rotate the
power supply bracket release tab
counterclockwise off of the power supply.
4� Gently lift the power supply assembly off the upright.
Power Jack
SATA (Signal) Jacks
and LED Indicators
Figure 22: Labeled Module Back/Module
Self-Test Set Up
Figure 23: Mean Well
Power Supply
Figure 24: Efore Power
Supply