Sony DXC-C33P Instructions For Use Manual page 38

4) A damaging surge of high-voltage power can still flow into this unit from
the i.LINK connector of connected equipment even when a separate i.LINK
cable is connected to another i.LINK connector on the equipment, for
example when connecting a hard disk to a computer with an i.LINK
interface card that provides multiple connectors.
Always power all equipment off and disconnect all power plugs from their
power outlets, both on this unit and on the connected computer and its
peripherals, before connecting an i.LINK cable.
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Connections