Sony MHC-GZR999D Operating Instruction page 106

 VIDEO/SAT AUDIO IN L/R jacks
Connect the audio output jacks of an
optional component (such as VCR or
satellite tuner).
 VIDEO/SAT VIDEO IN jack
Connect the video output jack of an
optional component (such as VCR or
satellite tuner).
 COMPONENT VIDEO OUT jacks
Connect the component video input
jacks of the TV or projector. If your
TV accept progressive format signals,
you must use this connection and set
"PROGRESSIVE (COMPONENT
OUT)" to "ON" (page 32). You can
enjoy higher quality video images.
Note
You cannot output the video signal
from the VIDEO/SAT VIDEO IN
jack through the COMPONENT
VIDEO OUT jacks of this unit.

VIDEO OUT jack
Connect the video input jack of the
TV or projector.
10
GB
 DVD DIGITAL OUT jack
Connect the digital optical input jack
of an optional digital component
(such as amplifier). You can enjoy
5.1 channel sound, if the connected
amplifier equipped with Dolby Digital
or DTS decoder.
Notes
 Sound is output only when the system
function is set to "DVD" or "USB. "
 If you press AUDIO, SOUND FIELD
or the buttons related to Karaoke
mode, or if you connect or disconnect
microphones or headphones, the sound
cuts off for a moment.
 SUBWOOFER OUT jack
(MHC‑GZR888D/GZR777D
only)
Connect the audio input jack of an
optional subwoofer.
Note
The effect may be limited or noise may
occur depending on the connected
subwoofer or the type of music being
played back.