Yamaha DSP-A3090 Mode D'emploi page 8

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.
* If you have exchanged batteries in the remote control unit with
new ones, press the RESET button before using the remote
control unit.
Make sure that the YPC/USER/LEARN switch on the remote
control unit is set to the YPC or USER position for normal
operation.
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.
Remote control transmitter operation range
Remote control
sensor
Notes
There should be no large obstacles between the remote control
transmitter 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 transmitter to work incorrectly. In this case, reposition the
4
main unit to avoid direct lighting.
Within approximately
6 m (19.7 feet)
Open/close the control door
When it is not necessary to operate controls inside the control
door, close the door.
To open the door
To close the door