Daktronics BA-1518, Руководство по обслуживанию

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Troubleshooting
9
Several models contain more than one driver to accommodate all of the digits and
indicators. Refer to the component location drawings in Appendix A to determine the
type and number of drivers for a particular model.
When troubleshooting driver problems, four red LEDs labeled
DS1 , DS2 , DS5 , and DS8
provide the following diagnostic information:
LED Function Operation Summary
DS1
Radio/
RS-232 RX
Blinking or off
DS1 will be blinking when the driver is receiving radio
signal and off when there is no signal.
DS2 Status Blinking
DS2 will be blinking at one second intervals to indicate
the driver is running.
DS5 Signal RX Blinking or off
DS5 will be blinking when the driver is receiving current
loop signal and off when there is no signal.
DS8 Power Steady on DS8 will be on and steady to indicate driver has power.
Note: While it is necessary to have the display powered on to check the LED status
indicators, always disconnect power before servicing.
Multiple Driver Connections
Displays with multiple drivers operate using a primary/secondary driver system. If it
appears as though only a certain group of digits is not functioning, there may be a
problem with the secondary driver(s) or the power/signal connection from the other
driver(s). Refer to the appropriate scoreboard installation manual or the schematics in
Appendix A for more information.
Replacing a Driver
1� Open the digit panel or display face panel nearest the driver as described in
Component Locations & Access (p�5) .
2� Remove the metal cover of the driver enclosure by lifting it up, then back and down
to expose the driver components.
3� Disconnect all plugs from the driver by squeezing the locking tabs together and
pulling the connectors free. It may be helpful to label the cables or take a picture to
know which plug goes to which jack when connecting the replacement driver.
4� Remove the nuts securing the driver to the inside of the enclosure.
5� Carefully lift the driver from the display cabinet and place it on a clean, flat surface.
6� Position a new driver over the screws and tighten the nuts.
7� Reconnect all plugs to their mating jacks on the new driver. The connectors are
keyed and will attach in one way only. Do not force the connections.
8� Ensure the new driver is set to the correct address. This will be the same address of the
old driver being replaced. Refer to Setting the Driver Address (p�10) .
9� Put the metal cover back on the enclosure, securely close the access panel, and
then power up and test the display to verify the issue has been resolved.