Sony KDL-19M4000 - Manual (Page 24)

Basic Operations
24
9 (IR) Infrared
Receiver Receives IR signals from the remote control.
Do not put anything near the sensor, as its function may be affected.
0 Speaker 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.
Item Description