18
Maintenance and Troubleshooting
7.
Reapply power to the power supplies turned off in
Step 1
.
8.
Test the modules:
a.
Display the moving row, moving column, and all on/off test messages. Run the
test messages at both 10% and 100% brightness settings. Watch for proper
operation of the LED module during each test message.
b.
Perform a pixel test and check that all pixels operate correctly.
5.7 Power Supply Replacement
Power supplies are located in each electrical bay. To remove a power supply:
1.
Turn off all power to the power supply group by turning off the breaker in the
panelboard.
2.
Locate the failed power supply reported by the VFC-3000 controller. In the upper-left
corner of each electrical bay is a white sticker labeled PSG1, PSG2, etc.
3.
Note the location and orientation of the plugs going into the LVDB on the failed
power supply. Disconnect the plugs going into the LVDB.
4.
Loosen the screws securing the power supply mounting plate to the metal truss, and
gently lift the power supply and mounting plate off the truss.
5.
Loosen the screws securing the power supply to the plate, and gently lift the faulty
power supply off the plate.
6.
Remove the screws connecting the LVDB to the power supply.
To replace the new power supply, repeat the above steps in reverse order.
5.8 LVDB Replacement
1.
Turn off power to the power supply containing the failed LVDB by turning off the
appropriate breaker in the distribution panel.
2.
Note the location and orientation of the plugs connected to the failed LVDB on the power
supply. Remove the screws connecting the LVDB to the power supply.
3.
Gently lift the LVDB off the power supply.
To replace the LVDB, follow the previous steps in reverse order.
