Sony HT-Z9F Operating Instructions Manual page 67

 If you change the [RF Channel] setting
from [Off] to [On] (page 33), it may
take 1 minute for the sound to be
output.
Sound skips or has noise.
 If there is a device nearby that
generates electromagnetic waves,
such as a wireless LAN or a
microwave oven in use, locate the
system apart from it.
 If there is an obstacle between the
main unit and the subwoofer, move
or remove it.
 Locate the main unit and the
subwoofer as close as possible.
 Change the [RF Channel] setting
(page 33).
 Switch the network connection of the
TV or Blu-ray Disc player from
wireless to wired.
Rear Speakers (not supplied)
No sound is heard from the rear
speakers.
 Make sure the AC power cord (mains
lead) of the rear speaker is connected
properly.
 If the power indicator on the rear
speaker does not light, try the
following.
– Make sure the AC power cord
(mains lead) of the rear speaker is
connected properly.
– Press  (power) of the rear speaker
to turn on the power.
 If the power indicator on the rear
speaker flashes slowly in green or
lights in red, try the following.
– Move the rear speaker to a location
near the main unit so that the power
indicator on the rear speaker lights
in green.
– Follow the steps in "Connecting the
Subwoofer and Rear Speakers
Wirelessly" (page 31).
– Check the wireless connection
status (page 58).
 Press REAR  + on the remote
control to increase the rear speakers
volume (page 48).
 If you change the [RF Channel] setting
from [Off] to [On] (page 33), it may
take 1 minute for the sound to be
output.
Sound skips or has noise.
 If there is a device nearby that
generates electromagnetic waves,
such as a wireless LAN or a
microwave oven in use, locate the
system apart from it.
 If there is an obstacle between the
main unit and the rear speaker, move
or remove it.
 Locate the main unit and the rear
speaker as close as possible.
 Switch the network connection of the
TV or Blu-ray Disc player from
wireless to wired.
USB Device Connection
The USB device is not recognized.
 Try the following:
 Turn the system off.
 Remove and reconnect the USB
device.
 Turn the system on.
 Make sure that the USB device is
securely connected to the
port (page 38).
 Check to see if the USB device or a
cable is damaged.
 Make sure that the USB device is on.
 If the USB device is connected via a
USB hub, disconnect it and connect
the USB device directly to the system.
 When connecting a WALKMAN® or
smartphone, its internal storage or
external storage (such as a memory
card) may not be recognized.
(USB)
67
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