Yamaha RX-V992 Mode D'emploi page 8

* After you insert batteries (or you exchange batteries with new
ones), press the RESET button before using the remote control
unit.
Remote control transmitter operation range
Remote control
sensor
Notes
There should be no large obstacles between the remote control
unit and the main unit.
If the remote control sensor is directly illuminated by strong
lighting (especially an inverter type of fluorescent lamp etc.), it
might cause the remote control unit to work incorrectly. In this
case, reposition the main unit to avoid direct lighting.
4
RESET button
Within approximately
6 m (19.7 feet)
Notes about the Remote Control Unit
When you notice that remote control operation has become
erratic, or the distance from which the remote control will function
has decreased, it's time to replace the batteries. Always replace all
batteries at the same time.
This remote control uses an advanced, highly directional infrared
beam. Be sure to aim the remote control directly at the remote
control sensor on the main unit when operating.