To do this, proceed as follows:
Open the "Service" menu
Enter the code 7109.
Confirm the variant.
Connect a USB flash drive with the latest
software.
If a suitable file has been found on the
USB flash drive, the "Update" menu item
appears. Select and confirm this for the
update to start.
Do not unplug the USB flash drive during
the update.
When the update is complete, the device
starts automatically.
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