Sony Bravia KDL-19M4000 Operating Instructions Manual page 24

Basic Operations
Item
9 (IR) Infrared
Receiver
0 Speaker
24
Description
Receives IR signals from the remote control.
Do not put anything near the sensor, as its function may be affected.
Outputs audio signal.
The CHANNEL + button has a tactile dot. Use it as a reference when operating the TV.
Make sure that the TV is completely switched off before unplugging the power cord.