Sony STR-AV770X User Manual
Page 25
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T63A
Sound
Problem
Cause
Solution
No sound is heard even if you adjust
VOLUME,
The speaker or program source
equipment is not connected correctly.
Connect the equipment correctly.
The SPEAKERS selector is not set
correctly.
Set the selector correctly.
The TAPE 2 MONITOR button has been
pressed for a program source other than
tape deck 2. (The indicator is lit.)
Press the button to disengage.
A wrong FUNOTION selector has been
pressed.
Press the correct FUNCTION selector.
Sound is heard only at a very low
volume.
The MUTING button has been pressed.
(The MUTING indicator is lit.)
Press the button to disengage.
One channel does not transmit audio, or
the volume from the left and right
speakers is unbalanced.
The BALANCE control is not set
appropriately.
Adjust the BALANCE control.
The speaker or program source is not
connected correctly.
Check and properly connect the
equipment.
There is an abrupt loss of sound from
one or both of the speakers, and the
PROTECTOR indicator flickers in the
display window.
A short-circuit problem activates the
protective circuit.
Turn off the unit, eliminate the short-
circuit problem and turn on the power
again. If there is no short-circuit problem,
consult your nearest Sony dealer.
Sound transmitted from the speakers is
reversed.
The speakers are not connected
correctiy.
Connect the right speaker to the R
SPEAKER terminals and the left speaker
to the L SPEAKER terminals.
There is lack of bass sound or the
instrument position is obscure.
The +/- connection of the speaker is
reversed.
Connect the speaker with the correct
phase.
Severe hum or noise is heard.
The connecting cords are not shielded
type.
Use shielded type cords.
A transformer, motor, TV or fluorescent
light affects the connecting cords.
Place the connecting cords in a location
away from a transformer or motor, and at
least 3 meters (10 feet) from a TV set or a
fluorescent light.
The audio components are too close to a
TV set.
If both are used at the same time,
separate the TV from the audio
components.
The unit is not grounded.
Connect the ground wire to the antenna
ground terminal.
The connections are loose.
Make secure connections.
The plugs and jacks are dirty.
Wipe the plugs and jacks with a cloth
lightly dampened with alcohol.
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