Roland UM-4 Owner's Manual page 44

Troubleshooting
Case 7: Does not work with Windows 95.
The UM-4 requires Windows 98. It will not operate on Windows 95.
Case 8: How can I rack-mount the UM-4?
Since the UM-4 is a one-space half-rack size, it can be mounted in a standard rack using the
separately sold rack-mounting adapter (Roland RAD-50). When using the Roland RAD-50,
do not attach the included rubber feet. Attach the UM-4 using the screws included with the
Roland RAD-50.
Case 9: I used a USB cable to connect the UM-4 to my computer,
and attempted to install it. However, the display indicates
"Unknown Device" instead of "USB Compatible Device".
If the display indicates "Unknown Device" instead of "USB Compatible Device" when you
connect the UM-4 USB cable, the Windows item [Start]-[Settings]-[Control panel]-
[System]-[Device Manager]-[Universal serial bus controller] will have a "USB
Compatible Device" entry added to it. Select "USB Compatible Device", press the
Properties button to open [USB Compatible Device Properties], and click "Update driver"
after clicking Device tab. The window shown in "step 1" of P.15 will appear. Perform the
installation as directed in the manual.
This problem can also occur if the USB waveform of your computer does not sufficiently meet
the standards. In this case, the problem may be solved if you connect the UM-4 via a self-
powered USB hub (USB hub containing a power supply).
Case 10: My computer hangs up when I open a MIDI file.
This problem can occur if the USB waveform of your computer does not sufficiently meet the
standards. In this case, the problem may be solved if you connect the UM-4 via a USB hub
(USB hub containing a power supply).
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