Replacing a Surge Board
The surge board is mounted inside the display below the
driver. To replace the surge board, follow these steps:
Figure 18: Surge Board
1.
Open the small panel by turning the latch fasteners
a half-turn counterclockwise.
2.
Disconnect and label all wires and connectors on
the surge board – they are noted in black on
.
3.
Remove the nuts securing the board to the inside of
the panel and pull it up off the screws.
4.
Install the new board by replacing the nuts.
5.
Reconnect all the wires and connectors.
6.
Replace the cover over the driver and surge board, fastening it securely.
7.
Close the digit panel and turn the latch fasteners a half-turn clockwise.
Replacing a Digit Segment for 36" Digits
The 36" digits are constructed in segments, as shown in
possible to replace only the defective segment. As with smaller digits, the segment circuit
boards are mounted to the back of the digit panel.
Do not attempt to remove individual
LEDs.
Replace a malfunctioning colon, decimal, or indicator assembly in the same manner.
To remove a digit segment,
follow these steps:
1.
Open the digit panel by turning the latch access fasteners
counterclockwise.
Figure 19: Digit Segments
2.
Disconnect the 2-pin power/signal connector from the back
of the individual segment (
). Release the connector
by squeezing together the locking tabs as the connector is
pulled free.
3.
The individual segments are secured to the inside of the
panel with fixed machine screws, spacers, and push nuts.
Remove the nuts and lift the segment off the standoff screws.
4.
Position a new segment over the screws and tighten the nuts.
5.
Reconnect the power/signal connector.
Note:
This is a keyed
connector it will attach in one way only. Do not attempt to
force the connection!
6.
Close and secure the digit panel and test the display.
18
Parts Replacement
