Sony MDR-IF140K - Manual (Page 11)

Operating the system
11 GB
4
Start playback of the
component connected to the
transmitter.
5
Adjust the volume.
If the infrared sensors are covered
by your hands when adjusting the
volume, the mute function will be
activated and volume may not be
adjusted. In this case, move nearer
toward the transmitter or orient the
infrared emitters on the left housing
towards the transmitter.
After listening to the programs
Take off the headphones, and then turn
off the power.
Note
You may hear some noise when you
disconnect the AC power adaptor from the
transmitter before taking off the headphones.
Sound is automatically muted if
noise increases
— Mute function
If the infrared rays are obstructed, or
the headphones are used outside their
effective range, noise will increase and
sound will become hard to hear. To
avoid potential ear damage as a result
of noise, this function mute any sound
from the headphones. Sound is
automatically restored when you move
nearer the transmitter or remove the
obstruction.
If no audio signal is input for
more than approximately 5
minutes
The transmitter turns off automatically.
Note
The brightness of the infrared emitters may
not be uniform, however, this is not a
malfunction.