Page 10 www.icron.com Icron Systems Inc
Troubleshooting
The following table offers some preliminary troubleshooting options. For
additional information, consult the Icron website or contact Icron technical
support.
Problem/Cause
Remedy
Power LED on the LEX
unit is not lit.
Cause:
LEX unit is not
receiving power.
Ensure the power adapter is securely connected
to both the LEX unit and to a proper local power
supply outlet.
Power LED on the REX
is not lit.
Cause:
Connection between
the LEX and REX units
is not correct.
Ensure that the proper Category 5 UTP cable with
straight through conductors is connected between
the REX and LEX units.
Link LEDs on the LEX
are not lit.
Cause:
Connection between
the LEX and REX units
is not correct.
Link LEDs on the REX
are not lit.
Cause:
a. The computer is not
functioning.
b. The computer does
not recognize the
USB Ranger.
1. Reset the computer.
2. If the link LEDs are still not lit:
a. Close all USB device applications on the
computer.
b. disconnect the LEX unit’s USB connector
from the computer.
c. disconnect the LEX unit’s power adapter
from the wall outlet.
d. reconnect the power adapter to the LEX
unit.
e. reconnect the LEX unit’s USB cable to the
computer.
3. Ensure the USB Ranger has been recognized
as a “Generic USB Hub” by the computer. If it
is not recognized, contact Icron Technical
Support for assistance.
Ensure that the proper Category 5 UTP cable with
straight through conductors is connected between
the REX and LEX units.
Icron Systems Inc www.icron.com Page 7
USB Cables
USB cables have two distinct connectors. The Type A connector is used to
connect the cable from a USB device to the Type A port on a computer or
hub. The Type B connector is used to attach the USB cable to a USB
device.
Figure 4.
USB connectors and ports
Power Handling
Some USB devices are powered directly from the USB and do not require
individual power supplies. These devices are called bus-powered devices.
The USB Ranger can provide power to these devices so they can be
operated remotely.
Bus-powered devices are further divided into low-power and high-power
categories. The type of USB Ranger you will need to supply the necessary
power depends on the number of USB devices you want to operate
remotely.
•
To operate one bus -powered device (either low-power or high-
power) use the USB Ranger 100.
•
To operate up to four low-power devices use the USB Ranger 400.
NOTE
: Typically devices with their own power source are considered to be
low power devices from a USB perspective.
USB Type A
port
USB Type A
connector
USB Type B
port
USB Type B
connector
