Power Supplies
The LED power supplies are identified as A-1591 or A-1633.
Complete the following steps to remove a power supply from the display:
1.
Locate the latch access fasteners on the front of the display. With a 5/32”
hex wrench turn the latch fasteners a quarter turn as shown in
Section 3.5
for opening the display front.
2.
Disconnect and label all the wires connected to the power supply.
3.
Remove the hardware holding the power supply in place to free the unit.
4.
Follow these steps in reverse order to install a new power supply. Refer to
the
Drawing C-200002
when reconnecting the wires.
Light Detector
The light detector is internally mounted and wired at
Daktronics. It is located in the top left corner of the
display door on the primary display as shown in
38
. A 4-conductor cable connects the light detector to
the controller. Only the Primary display has a light
sensor.
Figure 38: Light Sensor In Display
Modem
If a modem was included with the display, it is located in the modem enclosure
mounted at the display. Refer to the modem information
in
Section 3.7
for modem enclosure location.
Figure 39: Modem
1.
To replace a modem, first disconnect the power
and signal connections (refer to
the right
for the location of the connectors).
2.
The modem is held in place with four screws.
Remove the screws using a 3/16” nut driver,
and lift the modem out of the display.
3.
Install the new modem, replace the screws, and
reconnect power and signal cables.
The modem module has five LEDs.
•
The power LED should remain lit while power is
applied to the modem.
•
The modem RX and TX LEDs will flash when
communicating.
•
The carrier detect LED will light when the modem
has established communication to another modem.
•
The PC connect LED is not used when this modem is mounted in a display.
Maintenance and Troubleshooting
4-8
