Samsung LN23R71B Owner's Instructions Manual page 7

TV Side Panel [LNR7B, LN0R7B]
Use the left side panel jacks to connect a component that is used only occasionally, such as a camcorder or video game.
(See page 10)
1
2
1 AV IN 
Video and audio inputs for external devices, such as a camcorder or VCR.
S-VIDEO
Connects an S-Video signal from a camcorder or VCR.
HEADPHONE
2
Connects a set of external headphones for private listening
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