Daktronics AF-3050-20-R,A - Manual (Page 23)

removing the wires. Then release the hardware securing it to the inside of the enclosure.
Position the new transformer in its place, and tighten it down. Re-connect all the wires.
RFI Filter
The RFI electrical filters are mounted inside the power enclosure on either side of the
transformer (Z1 and Z2). Like the transformer, the filters can be replaced by first removing all
connecting wires, then releasing the attachment hardware. Install the new filter.
Fuse
The MWO-15 fuse is located in the left side of the power enclosure (F1). To replace the fuse,
push and turn the fuse cap, insert the new fuse into the cap and reattach. Replace the fuse only
with fuses of the same type and rating.
Controller
The controller sends data to the modules. Refer to the signal summary in Section 4.2 for more
information on the location of the controller board.
A typical controller is illustrated in Figure 13 below.
Figure 13: Controller Component Layout
“DIP” switches are located on the controller’s MDC. These DIP switches set the hardware
address, which is used by the software to identify that particular sign. When replacing a controller
board, be sure to set the DIP switches in the same address configuration as the defective
controller.
Note: Setting the DIP switches to address 0 (turn all the switches to OFF by flipping them toward
the printed switch numbers) can activate a test mode. The display’s power must be downed, and
then reconnected to run the test mode.
Maintenance and Troubleshooting 4-3