Sony STR-AV780 - Page 30

~ | PROBLEM
CAUSE
Amplifier
Severe hum or noise is heard.
shielded type.
| SOLUTION
The
connecting
cords
are
not
of
Use
shielded
connecting
cords.
A transformer, motor, TV or
fluorescent light affects the
connecting cords.
| Place the connecting cords ina
location away from a transformer or
motor, and at least 3 meters (10 feet)
from a TV set or a fluorescent light.
t
The audio components are too close
toa TV set.
if both are used at the same time,
separate the TV from the audio
components.
The receiver 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.
The Remote Commander does not
operate.
30
The batteries are exhausted.
Replace the batteries with new ones.
The MAIN POWER switch on the
receiver is not depressed.
Depress the MAIN POWER switch.