Daktronics KE-1010-7.6-RG - Manual (Page 27)

Replacing a Power Supply
Reference Drawings:
Component Layout Drawings .................................. Refer to Appendix A
Schematics............................................................... Refer to Appendix A
Power to the LED modules is provided by +5VDC power supplies. To remove a
power supply that has failed:
Figure 17: Disconnecting the
Power Supply Mounting Plate
1. Disconnect the 120 VAC power to the
section requiring service.
2. Remove the face panel per Section 4.1.
3. Remove the LED module in front of the
failed power supply per Section 4.2. Refer
to the Component Layout Drawings for
the location of the power supplies.
4. Each power supply is attached to a
mounting plate by two (2) M4x8MM
metric screws. The plate is secured to the
back sheet by two (2) #6 nuts. Remove the
#6 nuts to remove the plate with the power
supply (refer to
Figure 17 ).
5. Lift the power supply and plate out of the
display. The metric screws securing the
power supply to the plate are now
accessible.
6. Using a #1 Philips screwdriver, remove the screws to free the power
supply.
7. Disconnect all power supply wires. The power supply is now ready for
replacement.
8. Follow the previous steps in reverse order to reattach the new power
supply. Refer to your display’s Schematic for the proper wiring
information.
Shift Card Replacement
Reference Drawings:
Component Layout Drawings .................................. Refer to Appendix A
Schematics............................................................... Refer to Appendix A
The shift cards are used to relay signal from the controller or last module of the
previous section to the LED modules. There is one shift card in the right end of each
KE-1010 section (both “master” and “echo”). To replace a failed shift card:
1. Disconnect the 120 VAC power to the section requiring service.
2. Remove the face panel per Section 4.1.
3. Remove the last module in the right end of the ticker section per Section
4.2. Refer to the Component Layout Drawings for the location of the shift
card for each ticker display.
4. Remove signal connections from the shift card.
Maintenance &
Troubleshooting
4-3