Troubleshooting
9
Replacing a Driver
If the driver status indicators do not appear to be working correctly, it may be necessary
to replace the driver.
1� Open the control enclosure by removing the 6 screws and swinging the door open.
2� Disconnect all plugs from the driver by squeezing together the locking tabs and
pulling the connectors free. It may be helpful to label the cables or take a picture to
know which plug goes to which jack when connecting the replacement driver.
3� Remove the 4 nuts securing the driver to the control enclosure door.
4� Carefully lift the driver from the enclosure and place it on a clean, at surface.
5� Position a new driver over the screws and tighten the nuts.
6� Reconnect all plugs to their mating jacks on the driver. The connectors are keyed
and will attach in one way only. Do not force the connections.
7� Ensure the new driver is set to the correct address. This will be the same address of the
old driver being replaced. Refer to Setting the Driver Address (p�9).
8� Close and secure the enclosure door, then power up and test the display to verify the
issue has been resolved.
Setting the Driver Address
Reference Drawings:
Schematic: Control Enclosure- 120/240V AC .................................................. DWG-216653
Since the same LED drivers can be used for many display
models, each driver must be set to receive the correct signal
input, or address, for the model in which it is being used.
This address is set with jumper wires in a 12-pin plug which mates
with jack J1 on the driver (Figure 5). After replacing the driver
in the control enclosure, be sure to use an Address 1 plug in
jack J1. In most cases, the same plug can be reused from the
driver that was replaced; otherwise, one may be ordered from
Daktronics (part # 0A-1150-0122).
Note: For BB-2150 and BB-2151 to display 1/10 of a second, switch 8 of DIP switch S3
must be set to ON. Refer to DWG-216653 for additional DIP switch settings.
Replacement Parts
The following table contains display components that may require replacement. Many of
the other display components will have attached part number labels.
Description Part Number
Address 1 Plug 0A-1150-0122
LED Light Strip, 28.875" (BB-2140) 0A-1322-0008
LED Light Strip, 20.5" (BB-2141) 0A-1322-0009
Cable; 6-pin to 6-pin, 30' 0A-1322-0011
Horn Enclosure Assembly 0A-1322-0015
Cable Holder Assembly 0A-1322-0016
Horn Interface Card 0P-1192-0399
7" Four-Digit w/ Colon, Dual-Sided, Amber (BB-2140 & BB-2150) 0P-1322-0001
13" 7-Segment, Dual-Sided, Red (BB-2140) 0P-1322-0002
HAZARDOUS VOLTAGE
BEFORE SERVICING
DISCONNECT POWER
Driver Status
Indicators
Shot Clock DriverHorn Interface Card
Transformers
Figure 5: Address Jack J1
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