Daktronics DF-12xx - Manual (Page 24)

3-2 Maintenance and
Troubleshooting
Note: Disconnect power before servicing the display! Disconnect power, too,
when the display is not in use. Prolonged power-on may shorten the life of some
electronic components.
3.3 Service and Diagnostics
Replacing a Digit
The digit circuit board, the platform for the LEDs, is mounted to the back of the digit
panel. Do not attempt to remove individual LEDs. In the case of a malfunctioning
board, replace the entire digit panel. Refer to Figure 11 for the digit assembly.
To remove a display digit, follow these steps:
1. Open the digit panel as described in the
preceding section.
2. Disconnect the power/signal connector
from the back of the digit. Release the
connector by squeezing together the
locking tabs as you pull the connector
free.
3. The digits are secured to the inside of the
panel with fixed machine screws,
spacers, and push nuts. Remove the nuts
and lift the digit off the standoff screws.
(The push nuts can be removed in
several ways, but Daktronics
recommends using a
9 /
32
" nut driver.)
4. Position a new digit over the screws and
tighten the nuts.
Figure 10: DataMaster Gas Price Display with Door Panels Open
Figure 11: Digit Assembly