Sony ST-S444ES Service Manual page 6

Fm stereo /fm-am tuner
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T-S444ES
ST-S444ES
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© FM/AM selector button
Selects
the desired
band:
FM
or AM.
The
selected
band will be indicated in the display window.
@ IF BAND button
Normally press this button so that the IF BAND WIDE in-
dicator lights up. Low-distortion, hi-fi FM broadcasting
sound can be obtained. When
there is interference by
adjacent stations, press the button so that the IF BAND
NARROW
indicator lights up. The higher selectivity will
improve the reception.
© HI-BLEND button
When FM stereo signals are weak and noisy, press this
button so that the HI-BLEND ON indicator lights up.
This will provide better reception, although the stereo
effect at high frequencies is slightly reduced.
To deactivate the high-blend circuit, press the button
again. The HI-BLEND OFF indicator will tight up.
@ CAL TONE button
Normally press this button so that the CAL TONE
in-
dicator is not lit.
To obtain a 400 Hz, 50 % modulated signal for adjusting
the recording levei on a cassette deck, press the button.
The CAL TONE indicator will light up.
Generally, on cassette decks, adjust the recording level
so that the peak meters to —4dB, and on reel-to-reel
tape decks the peak level meters deflect as close as
possible to 0 dB. However, depending on the broadcast
programs
or the
tapes
you
use,
some
further
ad-
justments
may
be necessary.
You can determine
the
most
appropriate
recording
level for your tape deck
after several trials, using the suggested levels as a star-
ting point.
To deactivate the cal tone circuit, press the CAL TONE
button again.
© TUNING button
Press either side of this button to change the frequency.
Press the left side ( - ) to go to a lower frequency and the
right side ( + ) to go to a higher.
During automatic tuning:
Press to start automatic fre-
quency scanning. The frequencies below or above that
shown on the display window will be scanned automa-
tically until a signal is received. To resume
scanning,
press the button again.
During manual
tuning:
Press and keep the TUNING
button depressed to change the frequency continuously
until the figures in the frequency display window
ap-
proach the desired frequency. The frequency figures will
change
rapidly.
To change
the frequency
slowly
(in
0.05 MHz steps) to tune in a station accurately, press
the button and release immediately.
When the frequency figures reach the end of the tuning
range, the frequency will then be scanned from the op-
posite end of the tuning range.
@ Station
preset
buttons
and
station
identification
windows
To call up a memorized
station, press the appropriate
button.
Station labels (supplied) identifying memorized stations
can
be placed
in the station
identification
windows
above the buttons.
@ SCAN/READ button
This button
has a dual purpose.
With the PROGRAM
switch set to OFF, it works as
a memory SCAN
button
and with the PROGRAM
switch set to ON, as a program
READ button.
SCAN
button:
Press
to automatically
scan
the sta-
tions memorized on the station preset buttons.
READ button:
By pushing this button, the programmed
station order can be checked.
@ MEMORYISET button
This button has a dual purpose. With the PROGRAM
switch set to OFF, it works as
a MEMORY
button and
with the PROGRAM
switch set to ON, as a program SET
button.
MEMORY button:
Press to memorize the tuned station
to a station preset button. The MEMORY
indicator will
appear
in the
frequency
display
window
for a few
seconds
indicating that the preset memory
circuit is
standing by.
SET button:
Press to program the preset stations in
the desired order. The MEMORY indicator will appear in-
dicating that the program circuit is standing by.
@ PROGRAM
switch
To use the program function, set this switch to ON. For
ordinary use, be sure to keep the switch
in the OFF
position.
Display window
@® IF BAND indicator
Indicates the setting of the IF BAND button.
@ HI-BLEND indicator
Indicates the setting of the HI-BLEND button.
® MUTING indicator
Indicates the setting of the MUTING/MODE
button.
@ MODE indicator
Indicates the setting of the MUTING/MODE
button.
@® TUNING indicator
The AUTO indicator shows the automatic tuning mode,
and the MANUAL
indicator, the manual tuning mode set
with the TUNE MODE
button.
® CAL TONE indicator
Lights up to show that a 400 Hz calibrating tone signal
is provided by the CAL TONE button.
:
@® MEMORY
indicator
When the MEMORY/SET button is pressed, "MEMORY"
will appear for a few seconds indicating that the.memo-
ry circuit is standing by..
@ Band/frequency display
The band
and frequency
being
received
is displayed
here.
@ STEREO indicator
This indicator will light when an FM stereo program of
sufficient
signal
strength
is
tuned
in
with
the
MUTING/MODE button set to STEREO.
@® SIGNAL indicator
Indicates the strength
of the tuned signal by the amo-
unt of indicator illumination. The fullest illumination
means the antenna input signal is strong. When the in-
dicator illuminates only at the low end, it means
the
antenna input signal is weak.
The lines tracing the upper and lower ends of the ver-
tical bars indicate the signal-to-noise ratio curves.
@® PROGRAM
indicator
With the PROGRAM
switch set to ON, the order in the
programmed sequence of the station being received is
displayed here.
ST-S444ES

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