Daktronics G-100-7.6-R - Manual (Page 23)

4.3 Display Interior
Once the LED module panel is removed, the display interior will be visible. Various internal
components, including the display controller, the modem (when applicable), the light detector,
the transformer, LED modules, the power supplies and the buzzer are now accessible for
repair or replacement.
4.3.1 LED Module Replacement
If any LED modules fail, the recommended procedure is to replace the failed module
or send it to Daktronics or a certified dealer for repair. Refer to Section 4.7 for
information on packaging components for shipment.
To remove an individual LED module:
Maintenance and Troubleshooting
4-3
1. Disconnect the signal connection from the
failed module.
2. Gently pull the 10-pin ribbon cable from
the failed module.
3. Disconnect the power supply (refer to
Figure 14).
4. Press the tabs on each side of the four-pin
connector to release it.
Each module is held in place by #6 screws.
Using a Philips screwdriver, remove the
module screws from the front.
Figure 14: Disconnection of Power
Supply from a LED Module
Gently pull the filed module from the panel. Reverse the previous steps to attach a
new module.
4.3.2 Power Supply Replacement
Power to the LED modules is provided
by small 5V power supplies. Each power
supply can support up to four (4)
modules. They are located on the rear
side of the LED module panel.
To remove a power supply that has
failed, first remove the LED module on
the opposite side of the failed power
supply as described in Section 4.3.1.
Each power supply is secured to the
module panel with two (2) 3x10 metric
screws as shown in Figure 15. Use a #1
Philips head screwdriver to remove the screws.
Figure 15: Loosening of Power Supply
Screws
Disconnect the power cables as shown in Figure 16. The power supply is now fully
released and ready for replacement. Follow the previous steps in reverse order to
reattach the new power supply. Be sure to connect the power wires to the correct
locations. Refer to your display’s schematic for the proper wiring configuration.