Sony HT-SF470 Operating Instructions Manual page 68

There is no sound from digital sources
(from OPTICAL input jack).
• Check that the INPUT MODE is set to.
"OPT" for SAT/CATV input (page 62).
• Set "ARC" to "ARC OFF" when no sound
is output from TV OPT IN jack during TV
input (page 45).
There is severe hum or noise.
• Check that the speakers and components
are connected securely.
• Check that the connecting cords are away
from a transformer or motor, and at least
10 feet (3 meters) away from a TV set or
fluorescent light.
• Move your audio components away from
the TV.
• The plugs and jacks are dirty. Wipe them
with a cloth slightly moistened with
alcohol.
There is pop noise from a specific
component connected to this receiver
when you turn on the component.
• Check that the INPUT MODE is set to
"OPT" for SAT/CATV input (page 62).
There is
no sound,
or only a very low-
level sound is heard from the
centerl
surround speakers.
• Select "MOVIE-D.C.S.-" (page 33).
• Adjust the speaker level (page 60).
• Check that the speakers are connected
securely.
There is no sound from the subwoofer.
• Check that the subwoofer is connected
correctly and securely.
The surround effect cannot be
obtained.
• Make sure the sound field function is on
(press SOUND FIELD +/-).
• Sound fields do not function for signals
with a sampling frequency of more than
48 kHz.
68 US
Dolby Digital or DTS multi channel
sound is not reproduced.
• Check that the DVD, etc. you are playing
is recorded in Dolby Digital or DTS
format.
• When connecting the DVD player, etc., to
the digital input jacks of this receiver,
check the audio setting (the settings for the
audio output) of the connected component.
• Use the TV menu to set the Speaker
Setting to Audio System.
There is no sound from the component
connected to the DIGITAL MEDIA PORT
adapter.
• Adjust the volume of this receiver.
• The DIGITAL MEDIA PORT adapter
and/or component is not connected
correctly. Turn off the receiver, then
reconnect the DIGITAL MEDIA PORT
adapter and/or component.
• Check the DIGITAL MEDIA PORT
adapter and/or component device to make
sure it supports this receiver..
Video
There is no picture or an unclear
picture appears on the TV screen or
monitor.
• Make sure you have connected the video
output of your video component to the TV.
• Move your audio components away from
the TV.
• Depending on the DIGITAL MEDIA
PORT adapter, video output may not be
possible.