Sony STR-K990 手册
74
US
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 away from a TV set or fluorescent
light.
10 feet 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.
alcohol.
There is no sound, or only a very low-
level sound is heard from the center/
surround speakers.
level sound is heard from the center/
surround speakers.
• Select a CINEMA STUDIO EX mode
• Adjust the speaker level (page 34).
There is no sound from the sub woofer.
• Check that the sub woofer is connected
correctly and securely.
• Make sure you have turned on your sub
woofer.
The surround effect cannot be
obtained.
obtained.
• Make sure the sound field function is on
(press MOVIE or MUSIC).
• Sound fields do not function for signals
with a sampling frequency of more than
48 kHz.
Dolby Digital or DTS multi channel
sound is not reproduced.
sound is not reproduced.
• Check that the DVD, etc. you are playing
is recorded in Dolby Digital or DTS
format.
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.
check the audio setting (the settings for the
audio output) of the connected component.
Recording cannot be carried out.
• Check that the components are connected
correctly.
• Select the source component using the
input buttons (page 36).
Video
There is no picture or an unclear
picture appears on the TV screen.
picture appears on the TV screen.
• Select the appropriate input using the input
buttons.
• Set your TV to the appropriate input mode.
• Move your audio components away from
• Move your audio components away from
the TV.
• Assign the composite video input to
DMPORT input correctly.
• Depending on the DIGITAL MEDIA
PORT adapter, video output may not be
possible.
possible.
The source image input to the HDMI
jack on the receiver is not output from
the TV.
jack on the receiver is not output from
the TV.
• Check the HDMI connection.
• Depending on the playback component,
• Depending on the playback component,
you may need to set up the component.
Refer to the operating instructions
supplied with each component.
Refer to the operating instructions
supplied with each component.
Recording cannot be carried out.
• Check that the components are connected
correctly.
• Select the source component using the
input buttons (page 36).