Troubleshooting
7
Replacing Digit Segments
Digits that are 24" or larger are composed of seven circuit board segments. The digit
segment circuit boards are mounted to the back of the digit panel (
attempt to remove individual LEDs; it may be possible to make repairs by removing just
the defective segment.
To replace a digit segment:
1�
Open the digit panel as described in
.
2�
Disconnect the 2-pin (or 4-pin) plug from the back
of the digit segment by squeezing the locking tabs
together and pulling the connector free.
3�
Use a 9/32" nut driver to remove the nuts securing the
digit segment to the inside of the panel, and then lift
the digit segment off the standoff studs.
4�
Position a new digit segment over the studs, and
then tighten the nuts.
5�
Reconnect the 2-pin (or 4-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.
Some LED digit segments are connected to a breakout
board (
). If all the segments of an entire digit do
not work, it may be necessary to replace the breakout
board instead. Breakout boards are replaced in the
same manner as a digit segment.
Note:
Prior to May 2016, breakout boards were
contained within a small metal enclosure. These
enclosures have a cover that needs to be
removed to gain access to the breakout board.
Replacing Colons, Decimals and
Indicators
Colons, decimals, and other indicators are replaced in
the same manner as a digit segment. Some indicators
will be connected to a breakout board (
no indicators work, it may be necessary to replace the
breakout board instead. Breakout boards are replaced
in the same manner as a digit segment.
A
B
F
C
E
D
G
Figure 7:
Digit Segments & Panel
A
F
B
C
E
G
D
H
PWR
DRVR
A
B
F
G
C
E
D
Figure 8:
Breakout Board Enclosure
