Sony ST J60 audio tuner Operating Instructions

SON Yo
FM STEREO TUNER
OPERATING INSTRUCTIONS
Before operating the unit, please read this manual thoroughiy.
This manual should be retained for future reference.
O 1979 by Sony Corporation
OWNER’S RECORD
The model and serial numbers are located at the rear. Record
these numbers in the space provided below. Refer to them
whenever you call upon your Sony dealer regarding this product.
Model No. ST-J60 Serial No.
WARNING
To prevent fire or shock hazard, do not ex-
pose the unit to rain or moisture.
To avoid electrical shock, do not open the
cabinet. Refer servicing to qualified person-
nel only.
TABLE OF CONTENTS
Features... 1.1 122 4104 4 444 45 aa e a e e зо. 2
Unpacking........... FE 3
Precautions . . . . . . . . vn. aaa aaa 3
System connections .......Ñ.meerere re nro ce ore. 4
Connection notes. . . . . aaa een ae 4
Connection diagram . . .. 1... 2424244 4 0 4 100 2. À
Antenna connection . ..... 22444444 44 4 4 4 4440 5
Function of controls .. . 1 22221 4440444444 4 4 0 6406 6
FM reception. ..... 22424 44 46 4 eee e 7
Automatic tuning. . . . 1.224444 4 44 644 4 411120 7
Manualtuning. .. .. 2244 44444444 reee 8
Memory tuning .. .... 420444440444 444 4 4 4 1435 8
Station labels. .. . 1.222 4440444 444 6 4 0 0 1 444 6 9
Antennas ..... 2224 22 444 4 4 44 44 84 4 4 0 4 4400 10
Multipath reception ...... naaa e ae ..10
Antennaorientation .. ... e. oo. oe eenarorr ea. 10
Specifications. .. ....... ea aaa ea. 11
Troublechecks .. ... 2.220244 444 4 4 44 4 aaa ere e 0 11
Blockdiagram . . . .... o «2.22 ere aa back cover
FEATURES
e Accurate tuning can be easily made with the crystal locked
digital synthesizer system.
e Quick and accurate station selection with an electronic digital
readout on the frequency counter.
e Three methods of tuning are available:
Automatic tuning: The FM band is scanned automatically until a
signal is received.
Manual tuning: Tuning can be made either by changing the fre-
quency counter reading rapidly or step by step.
Memory tuning: The desired pre-memorized station can be quick-
ly received by pressing the station button.
e The memory contents are retained by the nonvolatile IC used for
the memory circuit during the time the tuner power is off. The
memory circuit also features a last station memory and memory
scanning. |
e Excellent reception characteristics are assured by employing
carefully selected parts ; a MOS FET in the front-end block for high
sensitivity, a uni-phase filter and an IC in the IF amplifier for high
selectivity, and a phase-locked loop IC in the multiplex decoder for
excellent separation and distortion characteristics.
e The 5-step LED signal strength indicator provides an easy
readout of the received signal strength.
@ À CAL TONE switch is provided for producing a 400 Hz signal
which is useful for calibrating the recording level on the deck.
® A lighting sensor automatically adjusts the brightness of the fre-
quency display in accordance with the lighting in the room.
UNPACKING
Do not throw away the carton and the associated material; they
will come in handy if you ever have to transport or ship the unit.
Inspect your unit immediately after unpacking. If any sign of
damage is found, consult your local Sony dealer.
When shipping the unit for repair work or to another location, it
should be repacked in the original carton and packing material just
as it was originally.
PRECAUTIONS
On safety
e Before operating the unit, be sure that the operating voltage of
your unit is identical with that of your local power supply.
e Should any liquid or solid object fall into the cabinet, unplug the
unit and have it checked by qualified personnel before operating it
any further. |
e Unplug the unit from the wall outlet if it is not to be used for an
extended period of time. To disconnect the cord, pull it out by
grasping the plug. Never pull it out by the cord.
On installation
@ Do not install the unit in a location near heat sources such as
radiators or air ducts, or in a place subject to direct sunlight, ex-
cessive dust, mechanical vibration or shock.
e Good air circulation is essential to prevent internal heat build-up
in the unit. Place the unit in a location with adequate air circula-
tion. Do not place the unit on a soft surface, such as a rug.
On operation
When the unit is not in use, turn the power off to conserve energy
and to extend the useful life of your unit.
On cleaning
Clean the cabinet, panel and knobs periodically with a soft cloth. If
finger prints, food and beverage stains, etc. are difficult to remove,
use a cloth moistened with a mild detergent solution. Do not use
any type of scouring powder, abrasive pad or solvent, since these
will damage the cabinet.
SYSTEM CONNECTIONS:
CONNECTION NOTES
e The power cord should be connected last of all, first making sure
that the POWER switch is turned off.
e To assure correct matching at the input and output terminals of
your audio system, refer to the “SPECIFICATIONS” on page 11,
and to the specifications given in the instruction manual provided
with your amplifier. Generally the output level of the tuner should
be equal to or slightly greater than the sensitivity of the corre-
sponding input. Also the output impedance of the tuner should be
considerably lower than the impedance of the corresponding input.
CONNECTION DIAGRAM -
FM ribbon antenna supplied
(Use this until you install an outdoor fm antenna.)
e 9
Loosen the nuts,
insert the lugs into
the holes as
illustrated, and
tighten the nuts.
For optimum reception, fully
extend the antenna, and fasten
the ends to a wall etc., using
thumbtacks or an adhesive tape.
e For all connections use low-capacitance type shielded cables
like the one supplied. Keep the cables as short as practicable,
avoiding horizontal runs. Excessively long runs, over 2 meters (6
feet), tend to reduce the high-frequency response, while horizontal
runs are susceptible to power line hum pickup.
e Be sure to connect the red plug to the right [R] jack and the re-
maining one to the left [L]. - The cable connectors should be fuily in-
serted into the jacks. A loose connection may cause hum and
noise. |
FM outdoor antenna
F type connector (supplied) for use
with a 75-ohm coaxial lead-in
ÉIANTENNAEE
Speaker
ХУ
to an ac outlet
| to tuner inputs
Stereo amplifier Speaker
ANTENNA CONNECTION
This tuner accepts either 300-chm twin lead or 75-ohm coaxial
cable. The 300-ohm twin lead is inexpensive and will be adequate
for most installations. However, in cases where local noise or
multipath pickup on the transmission line causes interference, a
75-ohm coaxial cable must be used. In locations where ignition
noise is severe, the antenna should be located as far away from the
highway as possible, and the lead-in should preferably be of the
coaxial type.
See page 10 for detailed information about FM antennas and
multipath reception.
300-ohm twin lead connection
Loosen the nuts on the 300-ohm terminals, insert the firmly twisted
wires into the holes, and tighten the nuts.
—\
a 3009 $
75-ohm coaxial cable connection
If 75-ohm coaxial cable is used, attach the supplied connector as
described below, and connect the cable to the 75Q COAXIAL IN-
PUT. |
@ Cut and remove the outer covering, shield braid and inner cover-
ing with knife or razor blade as shown.
Be careful not to damage the center conductor.
Shield braid Inner covering
Outer covering
Approx. 5mm (3/16) 4
Approx. 18 mm (3/4")
Approx. 2mm (2/16)
If the center conductor is a stranded type, twist the strands tightly
and solder them. Do not use too much solder.
@ Pass the ring over the cable, and spread the braid. Then push
the connector into the cable between the braid and the inner cover-
ing.
@ Cut the excess braid.
@ Crimp the ring with a lineman’s plier to secure the connector.
@ Let the center conductor protrude about 3 mm (!/s inch): cut off
the excess conductor.
Approx. 3 mm (1/0)
FUNCTION OF CONTROLS
Before plugging in or attempting to operate this tuner, it is sug-
gested that you familiarize yourself with all its switches and con-
trols and the purpose of each.
Each number in the photo is keyed to the descriptive text.
STEREO Indicator
SIGNAL/MULTIPATH indicator Е
Frequency Counter
POWER Switch §
CAL TONE Indicator
Lighting Sensor [AUTO DIMMER]
Station Identification Windows
Station Buttons
‘22 GTENED TONER AT-J60 =.
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MEMORY SCAN Switch §
MEMORY Switch
MANUAL TUNING Switches §
STEREO MUTING Switch €
& POWER Switch
Turns the operating power on or off. When the power is turned on,
the frequency which had been received before is turned in auto-
matically.
@ Frequency Counter |
Permits reading the received frequency at a glance from the
figures.
® SIGNAL/MULTIPATH Indicator
This is a dual-function indicator which normally shows the signal
strength of FM broadcast stations. A station is optimally tuned
when the highest possible numbered LEDs are illuminated.
By setting the SIGNAL/MULTIPATH switch to [1 MULTIPATH, the
indicator shows the magnitude of the multipath component of the
signal. For details refer to page 10.
O STEREO Indicator
Lights up when an FM stereo program of sufficient signal strength
is tuned in while the STEREO MUTING switch is set to. ON.
® CAL TONE Indicator
Lights up when a 400 Hz calibrating tone signal is provided by set-
ting the CAL TONE switch to [1 ON.
) AUTO TUNING Switches
CAL TONE Switch
SIGNAL/MULTIPATH Switch
O Lighting Sensor [AUTO DIMMER]
This senses the lighting of the room and selects the brightness of
the frequency display automatically. If the room is dark, the
display is dimmed, and if the room becomes lighter, the display is
brightened automatically.
O Station Identification Windows
Station labels (supplied) identifying pre-memorized stations are
placed in these windows.
O Station Buttons
To tune to a pre-memorized station, press the appropriate button.
The lamp in the station identification window above the button will
light up when the button is pressed.
© MEMORY SCAN Switch
Press for automatic scanning of the preset stations on the station
buttons. For details, refer to page 9.
O MEMORY Switch LE
Press to operate the memory circuit. The MEMORY indicator will
appear on the frequency counter for a few seconds indicating that
the memory circuit is standing by.
® MANUAL TUNING Switches
For manual tuning, press either of these two buttons to change the
frequency. |
Press the left switch [<] to go to a lower frequency, and the right
switch [>] to go to a higher. Momentarily pressing the switch
changes the frequency one channel (0.2 MHz) at a time. If you
keep the switch depressed, the frequencies will change rapidly.
® STEREO MUTING Switch
Normally keep this switch depressed (La ON) to eliminate FM in-
terstation noise while tuning from station to station.
When a stereo signal of sufficient strength is received, the tuner
operates in stereo mode and the STEREO indicator lights up.
When you want to tune in a very weak station, or when an FM pro-
gram is too noisy, depress again to release this switch (C1 OFF).
This will enable the tuner to receive weak stations, although the
stereo feature is sacrificed. When setting the STEREO MUTING
switch to OFF, keep the amplifier volume down to avoid speaker
damage caused by the interstation noise.
® SIGNAL/MULTIPATH Switch
Normally keep this switch depressed (££ SIGNAL). The SIGNAL/
MULTIPATH indicator shows the strength of the received signals.
To check the multipath reception, set this switch to the released
position (LI MULTIPATH).
® CAL TONE Switch
Normally keep this switch depressed (£2 OFF).
Press and release this switch ( [O1 ON) to obtain a 400 Hz, 50%
modulated signal for calibrating the recording level. When record-
ing broadcasts, first adjust the recording level by using this signal.
Generally, on ordinary cassette decks, adjust the recording level so
that the pointers of the VU meters deflect as close to —-3 dB as
possible, and on Elcaset decks or reel-to-reel tape decks, as close
to 0 dB as possible. However, depending on the broadcast pro-
grams or the tapes you use, some further adjustments may be
necessary. You can determine the most appropriate recording
level for your deck after several trials, using the suggested levels as
a starting point.
® AUTO TUNING Switches
For automatic tuning, press either of these two switches; the left
switch [<] to go to a lower frequency, and the right switch [>] to
go to a higher. When the switch is pressed, the frequencies below
(or above) that shown on the counter will be scanned automatically
until a signal is received. To continue scanning, press it again.
FM RECEPTION
AUTOMATIC TUNING |
By simply pressing the AUTO TUNING button [<] or [>] once, the
frequency counter figures change rapidly and stop automatically
~ when a radio broadcasting signal of a sufficient strength is receiv-
ed.
This tuning system is convenient for receiving those stations
whose frequency has not been memorized, or to see what kind of
programs are on the air.
Shows signal strength.
a 3 4) 5|
| i
[| Lit up.
| Not lit up.
|
SIGNAL —
Good signal reception
DU
|
Signal is weak. |
(Adjust the antenna.)
STEREO a
8 0 © COJE
a NT Y LILIA]
+ ==
Lights up when receiving
an FM stereo signal.
Depressed position
The received frequency is displayed.
@ Depress the POWER switch to ON.
O Press either the left [<] (for lower frequencies) or the right [>]
(for higher) AUTO TUNING switch to start automatic frequency
scanning.
The frequency counter figures change rapidly and stop when a
signal is received. If the received signal is not a desired one, press
the button again. Repeat this step until a desired station is tuned
in.
Notes
e When the frequency counter figures reach the edge of the tuning
range, 87.5 MHz or 107.9 MHz, the frequency will then be counted
from the opposite edge of the tuning range ; i.e., when the frequen-
cy is counted down to 87.5 MHz, the figures 107.9 will then appear
on the counter and continue counting down.
e |f the counter does not stop at the desired frequency, adjust the
antenna for optimum reception. If the signal strength is still too
weak for automatic tuning, tune in the station according to
“MANUAL TUNING” on the next page.
MANUAL TUNING
Shows signal strength.
Lit up. 2 Not lit up.
Good Signal reception
SIGNAL
; Signal is weak.
(Adjust the antenna.)
COCO
STEREO
POWER @ го
= MANBAL TUNING
ao ES ga @
Torso Sansscsclsessnds
Lights up when receiving
an FM stereo signal.
Depressed position
The received frequency is displayed.
@ Depress the POWER switch to ON.
O Select the frequency of the desired station with the MANUAL
TUNING switches.
Press either the left [< ] (for lower frequencies) or the right [ > ] (for
higher) switch and keep the switch depressed until the counter
figures approach the desired frequency. Then keep pressing the
switch momentarily to change the frequency 0.2 MHz steps until
the desired frequency appears on the counter.
Notes
® When FM stereo signals are noisy, or to tune in a very weak sta-
tion, lower the volume and release the STEREO MUTING switch by
pressing it again. This will result in better reception.
@ When the frequency counter figures reach the edge of the tuning
range, 87.5 MHz or 107.9 MHz, the frequency will then be counted
from the opposite edge of the tuning range ; i.e., when the frequen-
cy is counted down to 87.5 MHz, the figures 107.9 will then appear
on the counter and continue counting down.
MEMORY TUNING
With a conventional tuner, it is necessary to turn the tuning knob
and search for the desired station each time you wish to tune ina
station.
With this tuner, owing to an electronic tuning system using a PLL
(Phase Locked Loop) synthesizer and a memory circuit, the tuning
procedure is much simplified. Once you commit the frequencies
to memory, pushing a button is enough to tune in a desired station.
To memorize the station frequencies
The numbers in the illustration refer to the sequence of operations.
@ Depress the POWER switch to ON.
@ Tune in the station you wish to memorize with either the AUTO
TUNING switch or the MANUAL TUNING switch.
O Make sure that the disired station frequency is indicated on the
frequency counter, and check the receiving condition. Adjust the
antenna, if necessary, so that the SIGNAL/MULTIPATH indicator
lights up as fully as possible.
@ Press the MEMORY switch. The MEMORY indicator will appear
on the frequency counter indicating that the memory circuit is
ready for storing the data.
@ While the MEMORY indicator is illuminated, press the desired
station button to memorize the frequency. The lamp in the iden-
tification window above the button lights up and the frequency is
then committed to memory.
Note : The MEMORY indicator will go off automatically after a few
seconds. When the indicator is out, the memory circuit does not
operate to memorize the station.
Repeat the steps @ to @ for each station button. A total of 8 but-
tons can be preset in any desired sequence.
The previous memory will be erased when a new frequency is com-
mitted to the memory of the same button. An erasure cannot be
made without a new input.
To receive a preset station
Turn the POWER switch on and simply press the desired station
button.
Memory scan
This system is convenient for seeing what kind of programs are be-
ing broadcast by the pre-memorized stations.
When the MEMORY SCAN switch is pressed, the automatic
memory scanning system operates and the pre-memorized frequen-
cies will be automatically tuned in one after another, each for 3.5
seconds.
The scanning starts from the pre-memorized station just to the
right of the pre-memorized station being received when that station
has been tuned by memory tuning, and continues through all the
stations. The scanning starts from the pre-memorized station on
the far left and continues to the station on the far right when
manual or automatic tuning has been used. When it has reached
the station on the far right, it begins the sequence again. The lamp
in the station identification window above the button of the pre-
memorized station tuned in will flicker. If you decide that you
would like to listen to any of the stations being scanned, press the
button of that station and the scanning will stop.
Memory of the last received station
This tuner includes a memory circuit to remember the station which
had been received just before the power was turned off. This sta-
tion willl be automatically tuned in when the power is tuned on
again.
This memory system enables you to make a timer-activated re-
cording from the tuner.
e A station which has been received for less than 1 second cannot
be memorized, but the one before that is memorized, if received for
over a second.
elf the power is turned off while memory scanning, even if a sta-
tion has been received for 3.5 seconds, this memory circuit will not
operate.
STATION LABELS
Station labels are supplied for identification of the preset stations.
Affix the labels as follows:
@ Pull out the station identification plate from the cutout on the
right side.
Station identification plate
6 Pick out the appropriate labels for the pre-memorized stations
and put them on the plate as shown in the correct order.
O Replace the plate.
Check that the station labels match the pre- -memorized stations by
tuning in to each station.
ANTENNAS
Good FM reception depends not only on the tuner sensitivity but on
the quality of the received signals. This is determined by the
signal strength, the presence of multipath signal and the
geographic location of the desired FM stations. To get the best
from your tuner, use an antenna suited to your location. Until you
install a suitable one, the supplied ribbon antenna may be useful.
In a strong sinnal area, the familar “rabbit-ear” antenna is simple
to install and is usually suitable for FM reception, since it can be
adjusted easily for best signal pickup. If there are many high
structures nearby, and evidence of strong multipath reception is
present, use a highly-directional rotatable outdoor antenna.
If you wish to receive not only the local stations that an indoor
‘antenna pulls in, but to reach out into areas where there may be
programs more to your taste, use a high-gain directional outdoor
FM antenna properly installed with a rotator.
Ribbon dipole and rabbit-ear antennas pick up signals from both
front and rear equally well.
Dipole antenna with reflector has increased sensitivity to front signals
and reduced sensitivity to rear signals.
Multi-element type has narrower pickup pattern with high frontal
sensitivity and superior rejection of rear signals.
aE TR oe
MULTIPATH RECEPTION
The most important factor affecting FM signal quality is multipath
reception. Multipath is caused by signal reflections from hills or
structures that reach the receiving antenna perceptibly later in
time. Particularly with FM stereo, multipath can. cause severe
distortion and complete loss of channel separation. The effects of
a multipath condition appear as high-frequency noise and distor-
tion, particularly noticeable in music systems with extended
response. The effects of multipath reception can be avoided to a
great extent by using a coaxial or shielded twin lead lead-in, and a
good directional antenna that is correctly oriented. To help
10
eliminate the effects of multipath by antenna readjustment, this
tuner employs a visual readout of the received strength of the
multipath signal.
Reflected signal
(Multipath)
FM antenna
ANTENNA ORIENTATION
For the highest quality reception, once the antenna has been in-
stalled, it should be adjusted to furnish a maximum of signal
strength and a minimum multipath component. This can be readi-
ly done if either a “‘rabbit-ear” or motor driven antenna is used. Ad-
justment is facilitated by the use of the SIGNAL/MULTIPATH in-.
dicator. Normally this indicator gives a visual indication of the
station signal strength. However, when the SIGNAL/MULTIPATH
switch is set to IL MULTIPATH, the magnitude of the station
multipath component is visually indicated. The desired objective
of maximum signal and minimum multipath can be quickly and
easily accomplished by following this procedure :
@ Adjust antenna direction and height so that the SIGNAL/MULTI-
PATH indicator shows the best possible reception.
O Press and release the SIGNAL/MULTIPATH switeh ( CI MULTI-
PATH). |
® Rotate the antenna to find minimum illumination of the SIGNAL/
MULTIPATH indicator.
{| a 3] 4) 5| little illumination
MULTIPATH . no illumination
@ Depress the SIGNAL/MULTIPATH switch again (ZL SIGNAL) and
recheck to see if the signal strength is sufficient for lowest noise
reception.
If your favorite stations lie in different directions, this procedure
should be accomplished at each change of station. When a fixed
position antenna is used, vary the location and direction until an
overall satisfactory position is found before making the installation
permanent.
‘In locations where ignition noise is severe, the antenna should be
located as far away from the highway as possible, and used with a
shielded or coaxial lead-in.
SPECIFICATIONS
Tuner section
Tuning range
Antenna terminals
87.5 MHz - 107.9 MHz
300 ohms, balanced
75 ohms, unbalanced coaxial input
Intermediate frequency
10.7 MHz
Sensitivity at 50 dB quieting
16.1 dBf, 3.5 uV (mono)
37.3 dBf, 40 uV (stereo)
Usable sensitivity 10.3dBf, 1.8uV
Signal-to-noise ratio 77 dB (mono)
— 72dB (stereo)
Harmonic distortion at 100 Hz
0.06% (mono), 0.08% (stereo)
at 1 kHz
0.06% (mono), 0.08% (stereo)
at 10 kHz
0.06% (mono), 0.15% (stereo)
IM distortion 0.06% (mono)
0.08% (stereo)
Separation at 100 Hz 48 dB
at 1kHz 50dB
at 10kHz 40 dB
Frequency response 30 Hz -15 kHz +92 dB
Selectivity at 400 kHz 85dB
Capture ratio 1.0dB
AM suppression ratio
60 dB
Image response ratio
85 dB
IF response ratio 95 dB
Spurious response ratio
100 dB
RF intermodulation 70 dB
Sub-carrier product ratio
72dB
Muting and auto-tuning threshold
Approx. 5uV
Output level (75 kHz deviation)
750 mV, 4k ohms
CAL TONE 50% modulation (37.5 kHz deviation),
400 Hz |
General
System PLL crystal locked digital synthesizer
system
Semiconductors 11 ICs, 3 FETs, 38 transistors, 53 diodes,
.15 LEDS
Power requirements 120 V ac, 60 Hz
Power consumption 13W
Demensions Approx. 430 x 80 x 310 mm (w/h/d)
(17 x-31/4 x 121/4 inches)
including projecting parts and controls
Approx. 4.3 kg (9 Ibs 8 07) net
Approx. 5.1 kg (11 Ibs 402) in
shipping carton :
Supplied accessories
FM ribbon antenna (1)
75-ohm antenna cable connector (1)
Connecting cord (1)
Station label (1 set)
Weight
Design and specifications subject to change without notice.
TROUBLE CHECKS
The following checks will assist in the correction of most problems
which you may encounter with your unit. Should any problem per-
sist after you have made these checks, consult your nearest Sony
service facility.
Before going through the check list below, first refer back to “CON-
NECTION DIAGRAM” on page 4 and operating procedures on
pages from 7 to 9.
No audio output
e Check that the power cord is plugged into a working outlet.
@ Check the connections to the amplifier.
e Check the setting of the amplifier's input selector, volume con-
trol and power switch.
The SIGNAL/MULTIPATH indicator reading is unstable.
e Tune accurately.
e Adjust the antenna orientation.
e Check that the SIGNAL/MULTIPATH switch is depressed (a
SIGNAL).
The STEREO indicator flickers.
e Tune accurately.
e Adjust the antenna.
Severe hum or noise
e Tune accurately.
e Use shielded antenna leads.
e Avoid long horizontal runs of antenna lead.
e Keep antenna leads away from transformers or motors, and at
least 3 meters (10 feet) from TV sets and fluoresent lights.
e Adjust the antenna.
e When listening to FM stereo programs, releasing the STEREO
MUTING switch by depressing it will provide less noise in the
monaural mode.
Ignition noise
e Tune accurately.
e Install the outdoor antenna away from heavy traffic.
e Use a coaxial lead-in for the antenna.
Tuning cannot be done correctly when the station button is press-
ed.
@ Memorize the frequency correctly.
e Try again after turning off the power once and turning on again.
The frequency counter does not stop at the desired station during
automatic tuning.
e The signal strength is too weak for automatic tuning. Adjustthe
antenna for optimum reception or tune in the station with manual
tuning system.
11
BLOCK DIAGRAM
STEREO
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<A ye O НГ Ut On
S4 55
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AM
PLL 09 s3
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TO
| 5.76 MHz
Synthesizer section
MANUAL TUNING Control section
AUTO TUNING
AUTO DIMMER
N 52
Q©— e ¿—
сн Station buttons
= CECI ICL]
—0 o |
| — MEMORY
| ОС
® so LTT we
Frequency counter,
© Balun O Output amp si MEMORY SCAN switch
@ RF amp ® Relay $2 MEMORY switch
© Mixer ® Local osc. sa STEREO MUTING switch
© Uni-phase filter ® Buffer amp 54 SIGNAL/MULTIPATH switch
© IF amp e Prescaler S5 CAL TONE switch
© Driver ® Crystal osc.
@ SIGNAL/MULTIPATH Indicator O Buffer amp
0 Buffer amp © Controller
© CAL TONE osc. © Memory circuit
O Low-pass filter
Sony Corporation Printed in Japan
3-770-646-21 (1)