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

Contents

Daktronics BA-1018-11 Installation, Maintenance, And Specifications Manual Manual pdf 34 page image

The self-test runs in three cycles or phases. Each scoreboard self-test pattern will vary depending on thescoreboard model, the number of drivers and types of digits. Drawing A-133350 shows how the test pattern displays in the digits with no protocol pins seton J26 of the LED drivers. 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 isalways displayed when P26 is not installed.Cycle 2: Displays the driver number and address in the digits that are controlled by eachdriver. 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 rotatesthrough row 8 (refer to Drawing A-133350).8.7 Lightning ProtectionThe transient voltage surge suppresser (TVSS), located in the load center, reduces the brief surgeinduced into the power lines when lightning strikes in the vicinity of the scoreboard. A varistor in thepower 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 significantlyprotects the circuits against lightning damage. It is also required by the National Electrical Code. Inorder 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 thesystem is not in use. The same surges that may damage the scoreboard’s driver can also damage theconsole’s circuit.8.8 Replacement PartsRefer to the following table for Daktronics scoreboard replacement parts.Description Location DaktronicsPart No.LED Driver, 16 column Scoreboard 0P-1192-0011LED driver, 8 column Scoreboard 0P-1192-0012Power supply, 24 V @ 7.2 A, 120 V AC Driver enclosure A-1505Plug, 1/4” phone Signal P-1003J-Box, 1/4” phone, Indoor Signal 0A-1009-0038J-Box, 1/4” Phone, outdoor Signal 0A-1091-0227Signal surge arrestor Power/signal entranceenclosure0P-1033-011412V DC trumpet horn asm. Scoreboard 0A-1091-1213Signal cord; 1/4” phone 20’ N/A W-1236Signal cord; 1/4” phone 30’ N/A W-1238Signal cord; 1/4” phone 50’ N/A W-1237Digit, 15", 7-seg outdoor LED, red-orange Scoreboard 0P-1192-00098-4 Scoreboard Maintenanceand Troubleshooting