Part replacement
December 10, 2007
Front Access Full Matrix LED Sign Maintenance Manual (pn 1507610501 rev. A)
41
LED driver board replacement
➩
To replace a driver board
1.
Open the sign. See “Opening a sign” on page 28.
2.
Turn the sign breaker to the OFF position.
3.
Locate the LED driver board to be replaced and remove the following cables from the back of the
driver board:
•
Power cable (P1)
•
Addressing cable (P2)
•
Communications cable (P3)
4.
Unfasten the LED panel from the front face frame and lower the LED panel.
Figure 34.
Example of a 1.07-inch/1.35-inch pitch sign. The larger 1.75-inch pitch signs have lift arms and winch handles
5.
From the front of the LED panel, remove the four screws that hold the LED driver board to the LED
mounting panel.
6.
Attach the new LED driver board to the LED mounting panel.
7.
Raise the LED mounting panel up and fasten the panel to the front face frame.
8.
Reconnect the cables to the LED driver boards (P1, P2, and P3).
9.
Reapply power to the sign, close the door and verify operation.
WARNING!
Hazardous voltage. Contact with high voltage may cause serious injury or death. Always
disconnect power to unit prior to servicing.
LED panel
Front face frame
Quick release pin
Top of driver board
