Sony SRS-X99 Operating Instructions Manual page 23


If a LAN cable is connected to the unit,
disconnect it and restart the unit. When a LAN
cable is connected to the unit, the unit
automatically tries to connect to the home
network over a wired network and a wireless
network cannot be used.

Check that your wireless router is turned on.

Bring the unit and wireless router closer
together. Devices that use the 2.4 GHz
frequency band, such as a microwave oven,
BLUETOOTH or digital cordless device, etc.,
may interrupt Wi-Fi communication. Move the
unit away from such devices or turn them off.

Set the Wi-Fi antenna.

If a Wi-Fi network is not possible even if the
setting of a Wi-Fi network is correct, try the
following.
 Turn off the wireless router/access point,
wait a while and turn on the power again.
 Turn off the unit, wait a while and turn on
the power again.
Distorted sound/humming or noise in the
unit output

Turn down the volume of the connected
device.

If a connected device has an equalizer
function, turn it off.

Keep the unit away from a microwave oven,
other wireless devices, etc.

Keep the unit away from metal objects.

Connect the unit and wireless router/PC via a
LAN cable, not via Wi-Fi network.
No sound/low sound level

Check that both the unit and connected
device are turned on.

Turn up the volume of the unit and the
connected device.

Check that the connected device is being
played back.
iTunes cannot find the unit via AirPlay

Make sure the PC with iTunes installed and the
unit are connected to the same home
network.

Update the software version of iTunes to the
latest version.
General
/ (on/standby) indicator is flashing red

The unit is in the protect mode. Unplug the AC
power cord of the unit, and unplug all other
items connected to the unit. Then, plug the AC
power cord in again and turn on the unit. If
the / (on/standby) indicator keeps flashing,
consult your nearest Sony dealer or the shop
where you purchased this unit.
The last setting is not kept

If the AC power cord is disconnected while the
unit is on, the last usage setting before
disconnecting the AC power cord is not kept.
Turn off the power of the unit, and then
unplug the AC power cord.
The unit has entered standby mode or
BLUETOOTH/Network standby mode
unexpectedly

This is not a malfunction. The unit enters
standby mode or BLUETOOTH/Network
standby mode automatically due to the auto
standby function if no operation is performed
and no sound is input for about 15 minutes.
Refer to Help Guide for details about the auto
standby function.
To check Wi-Fi signal strength
(reception sensitivity)
While the unit is connected to the Wi-Fi
network, tap and hold the NETWORK button
until you hear a beep.
5 ·····
4 ·····
3 ·····
2 ·····
1 ·····
0 ·····
Signal Number of flashing function
strength indicators
Flashing stops when any button is tapped.
To receive a stronger signal, try the
following:

Change the direction of the Wi-Fi
antenna.

Turn off other wireless devices.
23 US