User manual

10
TROUBLESHOOTING THE USB-400FO EXTENDER
PROBLEM CAUSE SOLUTION
All LEDs on
Sender unit are
off.
The Sender unit is not
receiving power from the
USB port or the (optional)
Sender 5VDC power supply.
1. Ensure that the USB
connection between the
Sender and host computer is
properly installed.
2. Move the USB connector to
another USB port on the host
computer.
All LEDs on
Receiver unit
are off.
The Receiver unit is not
receiving power from the
5VDC power supply.
1. Ensure that the 5VDC
power supply is properly
connected to the Receiver
unit.
2. Check that the 5VDC
power supply is connected
to a live source of electrical
power. Check that the
Receiver power LED is
illuminated.
Link LEDs on
Sender unit
and Receiver
unit are off.
There is no connection
between the Sender unit
and Receiver unit.
1. Ensure that a multimode
fi ber optic cable with
crossover is connected
between the Sender and
Receiver units.
2. Connect a fi ber optic
crossover patch cord between
the Sender and Receiver
units. Recheck operation of
the system.
Link LED
on Sender /
Receiver
units are on,
Host LED
on Sender/
Receiver units
are off.
The host computer is not
powered on.
The Sender unit is not
connected to the computer
(when used with the
optional Sender 5VDC
power supply).
The computer does not
support USB hubs.
1. Disconnect all USB devices
from the Receiver unit.
2. Disconnect the Sender unit
from the computer.
3. Disconnect the Receiver
unit from the 5VDC power
supply.
4. Reconnect the Sender unit
to the computer