LEDs and Jumpers
The modem module has two (2) LEDs. The Power LED should remain lit while
power is applied to the modem. The Active LED will light when the modem is in the
process of communicating.
A modem system requires jumpers to be set on the controller board. Refer to
Section
for these jumper settings.
Fiber Board
The fiberboard has three LEDs. The power LED
(DS1) should remain lit while power is applied to
the module. The receive LED (DS2) will light
when the display fiberboard is accepting signal
from the fiber signal converter. The transmit LED
(DS3) will light when the display fiberboard is
sending to the fiber signal converter. In addition,
the fiberboard has two input fiber connectors that
the signal converter or the previous display
connects to, and two output fiber connectors that
connect to the next display. The fiberboard
connects to the controller board with a small DB9
to RJ11 adaptor and a straight RJ11 cable.
Figure 32:
Fiber Board
To replace a fiber optic board:
Tools required:
8mm Allen wrench, 5/16" nutdriver, and 3/16"
nutdriver
1.
Open the display and remove the module
in front of the fiber board in the lower left corner.
2.
Disconnect the power and signal connections (refer to
Figure 32
above for
disconnection of power).
3.
The fiber optic board is held in place with four 3/16" screws. Carefully
remove them.
4.
Install the new fiber board, replace the screws, and reconnect power and
signal cables.
Maintenance and Troubleshooting
4-7
