Samsung PDP 5500 series E-Manual page 58

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The colour and design of the IR EXTENDER CABLE may vary depending on the model.
Keep a distance of 5 cm at least between the IR EXTENDER CABLE and the external device, as the
illustration shows. Face the IR EXTENDER CABLE toward the external device's remote control signal
receiver. Note that it should be no obstacle between IR Extender and external device. The presence of
an obstacle will interfere with the transmission of the remote control signal.