Sony HT-Z9F Operating Instructions Manual page 66

The TV sound from this system lags
behind the image.
 Set [A/V Sync] to 0 msec if it is set to
the range between 25 msec and 300
msec (page 48).
 A time gap between the sound and
picture may occur depending on the
sound source. If your TV has a
function that delays the image, use it
for adjustment.
No sound or only a very low-level
sound of the device connected to
the system is heard.
 Press  + on the remote control and
check the volume level (page 14).
 Press  or  + on the remote control
to cancel the muting function
(page 14).
 Make sure the input source is
selected correctly. You should try
other input sources by pressing the
input select button on the remote
control (TV/HDMI1/HDMI2/ANALOG/
USB/BLUETOOTH) (page 14).
 Check that all the cables and cords of
the system and connected device are
firmly inserted.
 When you play content compatible
with copyright protection technology
(HDCP), it may not be output from the
system.
 Set
[Setup] - [Advanced Settings]
- [HDMI Settings] - [HDMI Signal
Format] to [Standard format]
(page 24).
The surround effect cannot be
obtained.
 Depending on the input signal and
the sound mode setting, surround
sound processing may not work
effectively. The surround effect may
be subtle, depending on the program
or disc.
 To play multi-channel audio, check
the digital audio output setting on
the device connected to the system.
For details, refer to the operating
66
US
instructions supplied with the
connected device.
Subwoofer
No sound or only a very low-level
sound is heard from the subwoofer.
 Press SW  + on the remote control
to increase the subwoofer volume
(page 48).
 Make sure that the power indicator
on the subwoofer is lit in green.
 If the power indicator on the
subwoofer does not light, try the
following.
– Make sure the AC power cord
(mains lead) of the subwoofer is
connected properly.
– Press  (power) of the subwoofer
to turn on the power.
 If the power indicator on the
subwoofer flashes slowly in green or
lights in red, try the following.
– Move the subwoofer to a location
near the main unit so that the power
indicator on the subwoofer lights in
green.
– Follow the steps in "Connecting the
Subwoofer and Rear Speakers
Wirelessly" (page 31).
– Check the wireless connection
status (page 58).
 If the power indicator on the
subwoofer flashes in red, press 
(power) of the subwoofer to turn off
the power and check whether the
ventilation holes of the subwoofer is
blocked or not.
 If the input sources contain very little
bass sound components (i.e., a TV
broadcast), the sound from the
subwoofer may be difficult to hear.
You can check the subwoofer sound
by emitting the test tone (page 54).
 Set the night mode to off. For details,
see "Enjoying Clear Sound with Low
Volume at Midnight (NIGHT)"
(page 47).