Daktronics KE-1010-7.6-RG - Manual (Page 30)

Maintenance
& Troubleshooting
4-6
4.4 Sign Maintenance
Visual Structural Inspection
Visual inspection should be done annually to check paint and for corrosion or any
structural weaknesses or loose welds. Fasteners should be checked and tightened or
replaced as required.
Ticker Controller Functionality LED Indicators
The ticker controller has four LEDs that indicate whether the controller is
functioning properly.
• Power LED: The power LED is labeled “PWR”. When the controller is
operating properly, this light should be on constantly.
• Run LED: The “RUN” LED is labeled “RUN”. When power is plugged
into the controller, this LED should blink at a set rate of about every half of
a second.
• Receive LED: The receive LED is labeled “RXD”. When the controller is
receiving signal from the data feed, this LED with flash each time it
receives a bit of information.
• Transmit LED: The transmit LED is labeled “TXD”. The transmit LED
will flash when the controller is transmitting back to the controlling
computer. Most of the time LED will be off, but will flash quickly when
responding to a get status command.
• NOTE: The transmit and receive LEDs will toggle on and off a few times
when the controller is establishing communication.
4.5 Troubleshooting
This section lists some symptoms that may be encountered with the ticker displays.
For these symptoms, possible cause and corrective actions are indicated. This list
does not include every possible problem, but does represent some of the more
common situations that may occur.
Symptom/Condition
Possible Cause/Remedy
A single pixel on the display will not light. • Check signal connection.
• Replace the module.
One or more LEDs will not turn off. • Check signal connection.
• Replace module.
Section of display not working. • Check power to the section.
• Check for input power to module.
• Replace ribbon cable.
• Replace/move the first module not working.
• Replace/move the last working module of the
previous section.
• Check power supply.
• Replace shift card.
• Replace the controller