Sony STR-D911 - Troubleshooting Common Audio Issues (2)

Problem
There is an abrupt loss of sound from
one or both of the speakers, and the
PROTECTOR indicator flickers on the
display.
Sound transmitted from the speakers
is reversed.
There is lack of bass sound or the
instrument position is obscure.
Cause
A short-circuit problem activates the
protective circuit.
The speakers are not connected
correcily.
The @/© connection of the speaker
is reversed.
Solution
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.
Connect the right speaker to the R
SPEAKER terminals and the left
speaker to the L SPEAKER terminals.
Connect the speaker with the correct
phase.
Severe hum or noise is heard.
The connecting cords are not shielded
type.
A transformer, motor, TV or fluorescent
light affects the connecting cords.
The audio components are too close
to a TV set.
The unit is not grounded.
The connections are loose.
The plugs and jacks are dirty.
Use shielded type 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.
If both are used at the same time,
separate the TV from the audio
components.
Connect the ground wire to the
antenna ground terminal.
Make secure connections.
Wipe the plugs and jacks with a cloth
lightly dampened with alcohol.
Surround effect cannot be obtained.
The unit is in a wrong mode.
The SOUND FIELD circuit is turned
Press CURSOR MODE to set the
surround mode.
Press SOUND FIELD ON/OFF.
The remote commander will not
operate.
The batteries are exhausted.
The commander head is not pointed
toward the unit's front.
Replace the batteries with new ones.
Point the commander head toward the
receiver.
rr
ep
The equipment cannot be operated.
The mode of the receiver is not same
with that of the remote commander.
Press the desired FUNCTION button
again.