Daktronics H-813S - Manual (Page 18)

3-4 Maintenance &
Troubleshooting
3.3 Segmentation
In each digit, certain lamps always go on and off together. These groupings of lamps are
referred to as "segments". Drawings A-26762 and A-38532 show which connector pin
number is wired to each digit segment, and the wiring color code used throughout the display.
3.4 Fuses
The lamp driver in the scoreboard has 17 fuses. There is one fuse to protect each digit circuit.
These fuses are type AGC-10 (refer to Drawing A-37073) and are located next to each digit
output under a single metal cover.
The other fuse, F17, is type AGC-1/2. It is located near the left end of the driver, under the
same cover as F1 through F16. This fuse protects the driver logic circuit and the fan.
Additionally, each display section has one fuse, F401, located behind the access door, to
protect 120 VAC wiring circuits.
Replace fuses only with fuses of the same type and rating.
3.5
Component Location and Access
Drawing A-28823 shows front views of the three dot-digit display models covered here, and
the locations of the various components. Drawing A-39710 shows the same thing for the
three bar-digit display models covered here. The component numbers correspond to the
schematic, Drawing A-28380 (at the end of Appendix A).
Refer to Drawing A-26762 for locations of lamp drivers and other components.
The lamp driver is located behind the indicator panel. Remove the screws securing the bottom
of the panel to gain access.