Daktronics AF-3400-12-RGB - Manual (Page 42)

Transformer and RFI Filter Replacement
Transformer
The transformer is located in the upper portion of the display’s power termination panel, as
shown in Figure 26.
Figure 26: One-circuit Power Termination
To replace the transformer:
1. Turn off power to the display before removing
the wires.
2. Disconnect and label all the wires attached to the
transformer.
3. Release the hardware securing it to the inside of the
enclosure.
4. Position the new transformer in its place, and
replace the fastening hardware.
5. Re-connect all the wires using the Drawing A-
253685 as a reference.
RFI Filter
The RFI electrical filters are inside of the power termination box. To replace an RFI (or Z)
filter, follow these steps:
1.
Like the transformer, label all connecting wires and then remove them.
2.
Release the attachment hardware.
3. Install the new filter using Drawing A-253685 as a reference.
Power Supply Replacement
Figure 27: Power Supply
A power supply unit has 12 outputs on the power distribution
board and controls up to twenty-four modules. Each power output
jack is paired with an automotive grade fuse. Each output from the
power supply assembly provides 12 VDC to the display modules.
To replace the power supply:
1.
Turn off power to the display.
2. Remove the module in front of the power supply to be
replaced. (Consult the Shop Drawing for its location.)
3.
Disconnect the power and signal connectors from the
power supply distribution board, labeling them for
replacement.
4.
Loosen the screw holding the power supply bracket to the
display cabinet and lift it off the screw. Carefully pull it out
of the cabinet.
5. Move the new power supply into place and tighten the
screw on the support bracket.
Maintenance and Troubleshooting 36