Edirol UA-1D Owner's Manual page 29

• Does your computer or USB hub have sufficient power supply
capacity?
The UA-1D cannot be connected if insufficient power is supplied to it. Check
whether one of the following cases apply.
If you are using the UA-1D with a notebook computer that is running on its
battery, operation may be unreliable with some models of computer. If this is
the case, connect the AC adaptor to your notebook computer.
The power conservation mode of your computer may limit the power that is
supplied to USB. Check the settings of your computer.
In some cases, the UA-1D cannot be used with a bus-powered hub (a hub that
does not contain a power supply). Please use a self-powered hub (a hub that
contains a power supply).
• Does your computer meet the USB specifications?
If you are using a computer that does not meet the USB specifications (such as
a homemade computer), operation may be unstable. In such cases, you may be
able to solve the problem by connecting a USB hub that contains a power
supply.
• Is "Unknown Device" displayed for "Other devices" or "Universal
Serial Bus controllers"?
Use the following procedure to delete "Unknown Device" from "Other
devices" (Universal serial bus controller), and re-start your computer.
1.
In the Windows Control Panel, double-click [System] to open the
System Properties dialog box.
2.
Click the [Device Manager] tab.
3.
Double-click [Other devices] (Universal Serial Bus controllers) to see the
list of devices.
4.
In the list, select Unknown Device and click [Remove].
5.
In the Confirm Device Removal dialog box, click [OK].
6.
Make sure that the list does not show Other devices or Unknown
Device, and click [Close] to close the dialog box.
In order to check whether or not the "Unknown Device" is
the UA-1D, disconnect the USB cable of the UA-1D, and
verify that "Unknown Device" has disappeared. Then
connect the UA-1D once again, and delete "Unknown
Device."
Troubleshooting
29