Troubleshooting Guide - Technics SA-GX550 Operating Instructions Manual

Before requesting service for this unit, check the chart below for a
possible cause of the problem you are experiencing. Some simple
checks or a minor adjustment on your part may eliminate the pro-
blem and restore proper operation.
tl you ale in doubt about _orvte ot the check points, or il the
remedies indicated in the chart do not solve the problem, refer to
the directory of authorized service centers (enclosed with this unit)
to locate a convenient service center, or consult your Technics
dealer for instructions.
(In U.S.A. consult MSC Authorized Servicenters for detailed instruc-
tions.)
I Problem I Probable cause(s) Suggested remedy I
While listening to FM broadcasts
An unusual hissing noise is
heard when listening to the
broadcast in stereo, but not
heard when listening
monaurally.
Noise Is excessive in both
stereo and monaural broad-
casts.
The FM stereo Indicator or
the quartz lock Indicator
flickers, without completely
Illuminating.
Excessive distortion in the
sound of stereo broad-
casts.
A slight noise may be heard because the method
used for modulation of FM stereo broadcasts is
different than that used for monaural broadcasts.
Poor location andlor direction of the antenna.
Transmitting station is too far away.
Poor location andlor direction of the antenna.
Transmitting station is too far away.
Nearby building or mountain.
• Try reducing the treble sound by using the treble
control.
• Try changing the location, height and/or direction of
the antenna.
• If an indoor antenna is being used, change to an
outdoor antenna.
• Try using an antenna with more elements.
• Try changing the location, height andlor direction of
the antenna.
• If an indoor antenna is being used, change to an
outdoor antenna.
• Try using an antenna with more elements.
While listening to AM broadcasts
An unusual "beat" sound is
heard.
A low-pitched "hum" sound
Is heard when the
broadcast Is tuned.
A strange hissing noise Is
produced continuously or
Intermittently.
Unit is being used at the same time as the
television set.
Interference from adjacent broadcast signal.
The AM loop antenna connection wires are too
close to the power cord.
The power supply frequency from the power cord
is modulated and heard from the speakers.
Caused by the "discharge phenomenon" and the
"oscillation phenomenon" of electric appliances
(such as fluorescent lights, TV, small series-type
motors, rectification equipment, etc.).
• Turn off the television set, or use this unit farther
away from it.
• Try reducing the treble sound by using the treble
control.
• Place the antenna connection wires and the power
cord farther apart.
• Install a special outdoor antenna.
• Try placing this unit farther away from such equip-
ment.
• Install noise-prevention equipment on this unit or on
the electric appliance.
While enjoying sound with DOLBY PRO LOGIC
The DOLBY PRO LOGIC When the Dolby Pro Logic system is ON, both A • When the Dolby Pro Logic system is ON, A and B
(SURROUND or 3 STEREO) and B speakers are turned ON. speakers cannot both be used simultaneously.
Indicator will flash.
Problems noted at all times
Power will not switch ON. The power cord plug is not completely inserted.
No sound Is heard when the Connections are incomplete or incorrect to the
power Is switched ON. speaker systems, etc.
The incorrect input selector has been pressed.
Sound stops during a
performance, or no sound
is heard when the power is
switched ON.
(Over load indicator is
Illuminated.)
• Confirm that the power cord plug is connected
completely.
• Check to be sure that all connection wires are
correctly connected.
• Check to be sure that the correct selector is
pressed.
• Turn on the speaker select indicator(s).
• Switch off the power, and after determining and
correcting the cause, switch on the power once
again.
• Use a speaker system of the proper impedance
rating,
The speaker select indicators are turned off.
The protection circuitry has functioned because
the positive and negative speaker connection
wires are "shorted", speaker systems with an
impedance less than the indicated rated
impedance of this unit are used or under severe
use, such as loud volume, excessive power and in
an excessively hot environment.
When both A and B speakers are being used
simultaneously, the Dolby Pro Logic system is
turned ON.
Speaker select indicators • When both A and B speakers are being used
([A), [B|) are flashing, simultaneously, the Doiby Pro Logic system cannot
be enjoyed.
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