Daktronics BA-2000 Series, Руководство пользователя

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Scoreboard Troubleshooting 25
5.5 Replacing Digit Segments
Some larger digits (24"/30") are constructed
with individual circuit board segments.
As with smaller digits, the digit segment circuit
boards are mounted to the back of a digit panel
(
Figure 21) . It may be possible to make repairs
by removing just the defective segment. Do not
attempt to remove individual LEDs.
To replace a digit segment:
1. Open the digit panel as described in
Section 5.2 .
2. Disconnect the 2- or 4-pin
power/signal connector from the back
of the digit segment by squeezing
together the locking tabs and pulling
the connector free.
3. The digit segments are secured to the
inside of the panel with fixed machine
screws, spacers, and push nuts. The
push nuts can be removed in several
ways, but a
9
/
32
" nut driver is
recommended. Remove the nuts and
lift the segment off the standoff studs.
4. Position a new segment over the screws and tighten the nuts.
5. Reconnect the power/signal connector.
Note: This is a keyed connector and it will attach in one way only. Do not attempt to
force the connection.
6. Close and secure the digit panel, then power up and test the scoreboard to see if
changing the digit segment has resolved the problem.
5.6 Replacing Colons, Decimals & Indicators
Colons, decimals, and other indicators are replaced in the same manner as a digit segment.
5.7 Power Supplies
Scoreboards with 16-column driver enclosures require a dual power supply assembly.
Replacing a Power Supply
To remove a power supply:
1. Open the access panel as described in Section 5.2 .
2. Remove the metal cover from the driver enclosure.
3. Locate and disconnect all wires connected to the power supply ( Figure 22 ).
4. Use a 9/32" nut driver to remove the hardware securing the power supply.
5. Fasten the new power supply in place and reconnect all wires.
Figure 21: Digit Segments & Panel (Rear View)