17
Testing and Replacing Display Components
Section 6: Testing and Replacing Display
Components
6.1 Testing 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
Note: When troubleshooting, it is
important to know that the module
may take up to eight seconds to change
the pattern.
Performing a Module Self-Test
If a module is blank and has power
supplied to it, you can perform a
module self-test. For full self-test
instructions, refer to
Performing
a Daktronics Module Self-Test in
Appendix A.
6.2 Replacing Module Power Supplies
The power supply provides power from the term panel to the module. For the 4203 series of
digital billboards, the module power supply is located on the uprights. Each power supply
typically controls two modules.
Replacing a Module Power Supply
1. Disconnect the power coming from the term panel to the
power supply.
2. Disconnect the power cable from the power supply to the
modules. Refer to
3. Pull the power supply assembly release tab.
4. Gently lift the power supply assembly off the upright.
5. Pull the power supply tab to release the power supply from
the mounting bracket and lift the power supply off the pegs.
6.3 Testing and Replacing a ProLink Router
A ProLink Router (PLR) sends the signal from the DMP-8065 to
the modules via SATA cables. For the 4203 series, the PLRs have
redundant power.
Figure 11:
Labeled Module Back
Assembly
Release Tab
Pegs
Power
Supply
Tab
Power
Supply
Figure 12:
Power Supply Mounted
to Upright
