Black Box IC165AE manual Troubleshooting, Power Problems

USB DIRECTOR/4-PORT HUB

5.Troubleshooting

5.1Power Problems

If an overcurrent condition of > 1⁄2 amp is sensed at a port by the hub, that port’s power will be limited (< 1⁄10 amp). The condition will be reported back to the host, the host will shut off the port, and the port LED will be off.

If a port LED is off, an overcurrent condition may exist on that port and/or the port that has been turned off by the host. To clear this condition, disconnect the device causing the fault and reset the hub by unplugging and replugging the uplink connection. All downstream devices will be reset.

If the hub is self-powered, you should see the reset LED come on while the host connection is disconnected. If in self-powered mode, you can also unplug the power connection and plug it back in to create a reset.

In bus-powered mode, if the hub has an overcurrent condition or if the sum of the current being drawn by all of the devices and the hub exceeds 1⁄2 amp, the hub will shut itself down and the uplink port red LED will turn

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