Daktronics BA-1018-11, Installation, Maintenance, And Specifications Manual

Page: 34 / 132

The self-test runs in three cycles or phases. Each scoreboard self-test pattern will vary depending on the
scoreboard model, the number of drivers and types of digits.
l
Drawing A-133350 shows how the test pattern displays in the digits with no protocol pins set
on J26 of the LED drivers.
l
Drawing A-133351 shows a sample of test pattern displayed on a scoreboard.
Cycle 1 : Displays the protocol in the digits that are controlled by LED driver A1. P0 is
always displayed when P26 is not installed.
Cycle 2 : Displays the driver number and address in the digits that are controlled by each
driver. A000 is always displayed when P25 is not installed.
Cycle 3 : Displays a rotating pattern in all digits. The pattern starts in row 1 and rotates
through row 8 (refer to
Drawing A-133350 ).
8.7 Lightning Protection
The transient voltage surge suppresser (TVSS), located in the load center, reduces the brief surge
induced into the power lines when lightning strikes in the vicinity of the scoreboard. A varistor in the
power lines to the driver logic also helps to protect this circuit by reducing such surges.
The use of a disconnect near the scoreboard to completely cut all current-carrying lines significantly
protects the circuits against lightning damage. It is also required by the National Electrical Code. In
order for this to provide protection, the power
must be disconnected when the scoreboard is not in use.
The control console should also be disconnected from power and from the signal J-box when the
system is not in use. The same surges that may damage the scoreboard’s driver can also damage the
console’s circuit.
8.8 Replacement Parts
Refer to the following table for Daktronics scoreboard replacement parts.
Description Location
Daktronics
Part No.
LED Driver, 16 column Scoreboard 0P-1192-0011
LED driver, 8 column Scoreboard 0P-1192-0012
Power supply, 24 V
@
7.2 A, 120 V AC Driver enclosure A-1505
Plug,
1
/
4
” phone Signal P-1003
J-Box,
1
/
4
” phone, Indoor Signal 0A-1009-0038
J-Box,
1
/
4
” Phone, outdoor Signal 0A-1091-0227
Signal surge arrestor Power/signal entrance
enclosure 0P-1033-0114
12V DC trumpet horn asm. Scoreboard 0A-1091-1213
Signal cord;
1
/
4
” phone 20’ N/A W-1236
Signal cord;
1
/
4
” phone 30’ N/A W-1238
Signal cord;
1
/
4
” phone 50’ N/A W-1237
Digit, 15", 7-seg outdoor LED, red-orange Scoreboard 0P-1192-0009
8-4 Scoreboard Maintenance
and Troubleshooting