Sony KP-46WT520 Operating Instructions Manual page 39

Using the CONTROL S Feature
CONTROL S allows you to control your system and other Sony
equipment with one remote control. In addition to allowing you to
control multiple devices with one remote control, the CONTROL S
feature tallows you to always point your remote control at your TV,
instead of having to point it at the other equipment, which might be
hidden or out of direct line of sight.
Use CONTROL S IN to send signals to tl-te _[V.
Use CONTROL S OUT to send signals to connected equipment.
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