Samsung LS19RTUSSZ-XAZ - Manual (Page 39)

4) PASSWORD
Be careful not to misplace the remote control since without it,
to select or cancel MagicChannel is impossible.
If you don't remember your pin number, turn the power off and
press 'MUTE+8+2+4'(press each key within 2 seconds' interval)
and then turn on the power to initialize the pin number.
MagicChannel should be operated only after channels are
selected by
Auto Program Seletion.
MaginChannel cannot be operated while other external devices
are connected.
MaginChnannel perfomes better when the remote control is
closer to the sensor.
OFF
RESET
PASSWORD