Panasonic AW-RP50E Mode D'emploi page 10

Installation precautions
 In addition to heeding the points presented in the "Safety precautions", 
observe the following precautions as well.
Be absolutely sure to ask your dealer to do the jobs of installing and connecting the unit.
Connecting the power supply
  Be absolutely sure to use only the power cable and AC adapter supplied with the unit.
  The power cable supplied with the unit has a 3-pin plug with a grounding terminal.
Connect it to a 3-pole outlet which has been connected to ground.
  Be absolutely sure to connect the ground terminal (SIGNAL GND) at the rear of the unit to the system ground.
  When the unit is not going to be used for a prolonged period of time, turn off its power, and disconnect the
power plug from the AC outlet.
  To prevent the DC plug from being disconnected, secure the cable of the AC adapter to the cable clamp.
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Cable clamp
  How to secure the DC plug (side view)
9 (E)
 Loosely secure the cable
clamp.
Loosely secure the cable clamp
in the area shown above.
 Fasten the cable clamp.
Strap part
Take hold of the strap part, slide
the cable clamp until it stops
moving, and then secure it tightly.