Sony VGX-TP1 - Manual (Page 58)

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Using Your VAIO Computer
To connect the remote sensor control
1 Plug the cable from the remote sensor control (1) into the INFRARED TRANSMITTER OUT jack (2) on the computer.
2 Remove the adhesive tape cover from the bottom of the remote sensor control (1).
3 Attach the remote sensor control (1) onto the set-top box (3) near the infrared port (4).