Daktronics DF-12xx - Manual (Page 26)

3-4 Maintenance and
Troubleshooting
In the display, the LED drivers perform the task of switching digits on and off. Refer
to Drawing A-166216 for a complete listing of connector functions and wiring pin
numbers for the correct driver for your display.
The following table lists the functions of the various jacks, including those that are
not used in this application.
LED Driver Jack Functions
The display line controlled by the driver is set with a DIP-switch that is set at the
factory before shipment. (Note: Some older drivers use a 12-pin address plug
inserted in J19). All DataMaster displays ship with the “Line 1” address already set.
Replacing a Signal Surge Board
Reference Drawings:
Enclosure Driver, 4 Column Reference....................... Drawing A-183775
The surge board is mounted inside the display enclosure and behind a digit. Refer to
Drawing 183775 for the location of your surge board. This display is front-
accessible.
1. Open the digit panel or display face panel.
2. Remove the cover from the driver enclosure.
3. Disconnect all connectors from the surge board. Release each connector
by squeezing together the locking tabs as you pull the connector free.
Note: When reconnecting, remember that these are keyed connectors and
will attach in one way only. Do not attempt to force the connections.
4. Remove the nuts securing the driver to the inside of the enclosure.
5. Carefully lift the surge board from the display and place it on a clean, flat
surface.
6. Follow the steps in reverse order to attach a new driver.
Jack No. Function
J1-J4 (4-column) Digits Output
J17 Signal/Power Input
J20 Protocol-5 Location
J23 12 VDC Power Out
J24 Modem
TB1 CAN (photo sensor)
J19 Address Plug (older drivers only)
J18, J21, J22, J25, J26, J27,
J28
Jacks not used in this application