Sony UP-D55 Instructions For Use Manual page 11

a)
Operations of all of devices which conform to USB
2.0, or all USB 2.0 extension boards/extension
cards cannot be guaranteed.
Note
When the UP-D55 is connected to the computer with the
power turned on, do not turn your computer to standby
mode (suspend status) or in pause mode. Doing so may
cause a malfunction of the operation.
11
Installing the Printer Driver