Daktronics FB-2500 Series, Руководство по обслуживанию

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Troubleshooting
6
Digit panels are held in place on the display
face by an offset flange across the top and by
screws at the bottom, as shown in Figure 5 .
To open a digit panel:
1� Hold the digit panel in place by putting
hand pressure on it and remove the holding
screws.
2� Carefully lift the panel away from the
display, sliding it out and down.
Note: If the panel is not held in place when
the screws are removed, it could drop
and possibly damage the LEDs or the
digit harness.
With a non-digit access panel, simply remove the top, side and bottom screws holding
it in place. Some panels are hinged and swing open when the screws are removed or
loosened. Rear access panels can be lifted up and off through keyholes.
When closing a digit or access panel, make sure all screws/latches are holding it firmly in
place to prevent moisture and debris from entering the display cabinet.
Replacing Digits
Digits that are 18" or smaller have LEDs embedded on a single circuit board that is
mounted to a black polycarbonate tray and encased in protective gel. This weather-
sealed digit tray is mounted to the back of a digit panel as shown in Figure 6 . Multiple
digits may be secured to a single face panel. Do not attempt to remove individual LEDs;
in the case of a malfunctioning LED or digit segment, replace the entire digit.
To replace a digit:
1� Open the digit panel as described in
Component Locations & Access (p�5) .
2� Disconnect the 9-pin plug from the back
of the digit. Release the connector by
squeezing the locking tabs together while
pulling the connector free.
3� Use a 9/32" nut driver to remove the
nuts securing the digit to the inside of
the panel, and then lift the digit off the
standoff studs.
4� Position a new digit over the studs, and
then tighten the nuts.
5� Reconnect the 9-pin plug. This is a keyed
connector and it will attach in one way
only. Do not force the connection.
6� Close and secure the digit panel, and
then power up and test the display to
verify the issue has been resolved.
Scoreboard
Face Panel
Digit Panel
Holding
Screws
Digit
Power/
Signal IN
Figure 5: LED Digit Panel
Stud
Digit Panel Digit
Power/
Signal IN
Nut
Figure 6: Weather-Sealed Digit Panel Assembly