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GENERAL TROUBLESHOOTING CHART
PROGRAM
SOURCE
SYMPTOM
PROBABLE
CAUSE
|
WHAT
TO DO
Tuner.
* Noise during AM recep- | * Interference by adjacent sta- | * Peculiar to AM waves, and unavoid-
tion.
tions (called
beat interfer-
able to some extent.
ence).
* TV set is being used simul- | * Move TV set away from tuner and
taneously.
amplifier.
Noise heard at certain | * Interference by nearby elect- | * Attach
noise
limiter
to appliance
hours, in certain areas
rical appliances.
producing noise.
oe over part
of dial
* In some cases, can be eliminated by
uring AM reception.
reversing power cord plug-AC outlet
connections.
Pop noise during
FM | * Ignition noise from nearby | * Adjust antenna location
and height
reception.
automobile, motorcycle, etc.
for maximum sensitivity.
* Keep antenna away from streets.
Note:
In many cases, high-frequency noise during radio reception cannot
be entirely eliminated.
Try
turning on amplifier's
High
Filter
Switch or turning Treble Control counterclockwise.
Turntable.
Hum noise.
* Unshielded
cables
used to | * Use regular shielded cables.
connect turntable.
* Examine connecting cables, especial-
* Minus (ground) wire of con-
ly their plugs.
stones a
1s not connect- | * Connect grounding lead of turntable
ea completely.
to amplifier's GND terminal.
* Turntable motor or tonearm
is not grounded.
Loud oscillating noise.
* Turntable is placed on top | * Place thick cushion between turntable
of or too close to speaker
and speaker systems.
systems.
* Change
location of
turntable
and
speaker systems.
* If using microphone(s), move or direct
them away from speaker systems
Sound is shaky.
* Dust
on record
or pickup | * Clean record and pickup stylus.
7
stylus.
-* Replace pickup stylus.
* Worn pickup stylus.
* Adjust stylus pressure.
* Improper stylus pressure.
Tape Deck.
Hiss noise.
* Magnetic heads are magnet- | * Demagnetize heads.
ized.
* Turn on High Filter Switch.
* Connect noise reduction adaptor.
Sound is not clear.
* Dust on magnetic heads.
* Clean heads.
* Tape is not pressed tight to | * Align tape transport mechanism.
heads.
7
General.
When
left
and
right | * Left
and
right
channel | * Never mind.
Optimum
stereo effect
channel sound
volumes
are balanced with ampli-
fier's Balance
Control,
it does
not
come
to
center position.
Musical
and singer not located
clearly.
Want to listen at very
low
volume
level
at
night.
instruments
*
is obtained
by adjusting
Balatice
Control so that sound
comes
from
Left and right speaker sys-
midway point between two speaker
signal strengths vary
with
program source.
Left-right,
plus-minus
con- | * Examine connections once.
nections of speaker systems,
input cables are wrong.
* Turn
on
Muting
Switch,
then
adjust Volume Control.
Fine adjustment of very low
volume cannot be done with
Volume Control.
2416
2
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