Yamaha DDP-1 Owner's Manual page 7

AC-3 DIGITAL OPTICAL/COAXIAL terminals
OPTICAL
These terminals input AC-3 signals in digital signal format.
They are provided for future use.
* Do not remove the cover of the OPTICAL terminal unless
you will use this terminal in order to protect the terminal from
dust.
AC–3 DIGITAL
COAXIAL
AC OUTLET (UNSWITCHED)
The power cord of any audio/video unit can be connected to
this outlet.
The power to this outlet is not controlled by this unit's POWER
switch. This outlet will supply power to the connected unit even
if this unit is turned off.
The maximum power that can be connected to this outlet is
200 watts.
AC OUTLET
UNSWITCHED
I20V 60Hz
I.6A MAX.
200W MAX.
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