Troubleshooting Guide.36 - Technics SA-AX730 Operating Instructions Manual

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Troubleshooting guide
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
problem and restore proper operation.
If you are in doubt about some of the check points, or if 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 dealer
for instructions.
Problem
Probable cause{s)
Suggested remedy
Page(s)
While listening to FM broadcasts
Hiss heard during stereo
broadcasts, but not during
monaural ones.
Modulation for the two types is different so some
noise may be heard during stereo broadcasts.
• Reduce the treble.
• Change the location and direction of
the antenna.
32
12, 13, 14
Excessive noise in both
stereo and monaural
broadcasts.
Antenna location and direction poor.
• Use an outdoor antenna.
• Use an antenna with more elements.
13, 14
Station is distant.
STEREO and QUARTZ
LOCK indicators flicker.
Antenna location and direction poor.
• Change the location and direction of
the antenna.
• Use an outdoor antenna,
12, 13, 14
Station is distant.
13, 14
Stereo broadcasts highly
distorted.
Building or mountain nearby.
• Use an antenna with more elements.
While listening to / UVI broadcasts
Unusual "beat"sound.
A television is on nearby.
• Separate the two or turn the television
off.
-
Adjacent signal is interfering.
• Reduce the treble.
32
Low-pitched "hum" heard
when a station is tuned.
Power cord is near the antenna wires.
• Separate the power cord from the
wires.
-
Electronic interference from a power cord .
• Use an outdoor antenna.
13, 14
A continuous or
intermittent hiss is heard.
Interference from other appliances.
■ Separate
this unit from such
appliances.
-
An AM broadcast station
cannot be picked up
clearly.
Frequency steps is set to 10 kHz.
• Hold down [BAND] for about 3
seconds, this will changes frequency
step to 9 kHz.
20
Common Problems
»
Unit doesn't come on.
The power cord plug is not fully inserted.
• Confirm the plug is fully inserted.
-
Sound is not heard.
The speaker indicators are off.
• Turn on the speaker indicators.
18
The tape monitor function is on.
♦ Press the tape monitor button.
19
The muting function is on.
• Press the muting button on the
remote control.
32
Incomplete or incorrect connection to speakers
and external equipment.
• Check all connections.
8, 9, 10, 11
15, 16, 17
The incorrect input source has been selected.
• Select the correct source. 18
Sound suddenly stops or
none is heard when the
unit is switched on.
"OVERLOAD" appears on
the display.
The protection circuitry has functioned because:
the positive and negative speakers wires have
shorted; speakers with a lower impedance than
this unit's rated impedance are being used; the
speakers are under strain through excessive
volume, excessive power, or by being used in a
high temperature environment.
• Switch off the unit, determine and
correct the cause, then switch the unit
on.
• Use speakers with the right impedance
rating.
16, 17
T4774