Sherwood WD-1 Guide D'utilisation page 22

WD-1 NETWORk Av ADAPTER
1
Connect the USB connector of the
main unit to the device which stores
the firmware.
2
Press the buttons in the following
order.
MODE 
Note
• When the main unit does not turn on
automatically after updating, you should
turn on the unit manually.
• Make sure not to turn off the main unit,
disconnect the USB cable or perform
any operation on the main unit while the
updating operation is in progress.
22
  ENTER