Audio System Operating Hints - Toyota TNS700 Owner's Manual

Audio system operating
hints
NOTICE
To ensure correct audio system opera-
tions:
Be careful not to spill beverages over
D
the audio system.
Do not put anything other than on ap-
D
propriate disc into the CD player slot.
The use of a cellular phone inside or
D
near the vehicle may cause a noise
from the speakers of the audio
system which you are listening to.
However, this does not indicate a
malfunction.
Radio reception
Usually, the problem with radio reception
does not mean there is a problem with your
radio — it is just the normal result of condi-
tions outside the vehicle.
For example, nearby buildings and terrain
can interfere with FM reception. Power lines
or telephone wires can interfere with AM sig-
nals. And of course, radio signals have a lim-
ited range, and the farther you are from a sta-
tion, the weaker its signal will be. In addition,
reception conditions change constantly as
your vehicle moves.
Here are some common reception problems
that probably do not indicate a problem with
your radio:
AUDIO SYSTEM
FM
Fading and drifting stations — Generally,
the effective range of FM is about 40 km (25
miles). Once outside this range, you may no-
tice fading and drifting, which increase with
the distance from the radio transmitter. They
are often accompanied by distortion.
Multi- -path — FM signals are reflective,
making it possible for two signals to reach
your antenna at the same time. If this hap-
pens, the signals will cancel each other out,
causing a momentary flutter or loss of recep-
tion.
Static and fluttering — These occur when
signals are blocked by buildings, trees, or
other large objects. Increasing the bass level
may reduce static and fluttering.
Station swapping — If the FM signal you
are listening to is interrupted or weakened,
and there is another strong station nearby on
the FM band, your radio may tune in the se-
cond station until the original signal can be
picked up again.
AM
Fading — AM broadcasts are reflected by
the upper atmosphere — especially at night.
These reflected signals can interfere with
those received directly from the radio station,
causing the radio station to sound alternately
strong and weak.
Station interference — When a reflected
signal and a signal received directly from a
radio station are very nearly the same fre-
quency, they can interfere with each other,
making it difficult to hear the broadcast.
Static — AM is easily affected by external
sources of electrical noise, such as high ten-
sion power lines, lightening, or electrical mo-
tors. This results in static.
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