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TABLE OF CONTENTS
Section
Title
Page
SpecificatlOnsiecs.
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FOALtUPOS aio divecispecdeetevens oued cdaveccolecess sceceeueedseusbe Re ee eettteane ae 3
1.
1-1.
Location and Function of Controls ......... eee 4
1-2.
Broadcast RECEption ...........:cesscceeseesereeeeeeessereeeeees 5
1-2-1. Tuning in Manually .0..... cece sees eeseneeeserseeeeeeeee 5
1-2-2. Tuning in Automatically ..........csessseecseseseeseeees 5
1-2-3. Storing station frequency into memory ............ 6
1-2-5. Scanning Stored Stations Automatically .......... 7
1-2-6. Scanning Stored Stations Manually ..............0. 7
2.
2-1.
10601 (u4PD75108CW-A76) Pin Functions ............. 8
3.
BLOCK DIAGRAM .............:2:ccccceeeeeseeseeeeseeeeneerenes 11
4.
ELECTRICAL ADJUSTMENTS ............. cece
13
5.
5-1.
Printed Wiring Boards ...... eee esseseneesseeseeeseeeees 17
5-2.
Schematic Diagram ..........cccseeeecesssesesseeeeseeseeees 21
5-3.
Schematic on Waveforms .....ccecssecseeeseeeseeeeees 24
5-4.
IC Block DiaQrarn .......eeeeeseecceeeeeeseeesesetteeeereenseeeees 24
5-5.
Semiconductor Lead Layouts .......
eee seseeeseeeee 26
6.
6-1.
CABINET ASSEMBLY ....... i eeceeeesesscesesseseeteesrereees 27
6-1.
CHASSIS ASSEMBLY ....... eee eeseeseseeesereeerereees 29
7.
ELECTRICAL PARTS LIST 0.0.0...
cc ssceecseeesetcensaeeee 31
« Note:
G: Germany model
IT: Italian model
| ST-S770ES
Features
Precise Tuning with the large knob
The detected revolution of the tuning knob is under digital-
control so that you can tune in the correct frequency and
stored station easily.
This system employs a variable muting function that adjusts
itself to the rotation speed of the TUNING knob and changes
the muting time.
This function realizes a feeling which is
very close to that of an analog type tuner.
Direct comparator technology
An employed PLLIC allows the comparison frequency to be
as high as the channel spacing frequency, thus eliminating
the tendency of a low comparison frequency to slip into the
audio range and degrade the signal-to-noise ratio.
Free from digital noise
When the tuning completes, the clock oscillator
of the micro-
computer stops. Since the received signal passes through
only analog circuits, you can enjoy the pure sound without
an interference.
NEW
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The WOIS (Wave Optimized IF System) which makes the IF
waveform
optimum shape in stereo and monaural mode
and the WODD
(Wave Optimized
Direct Detector) which
forms the VCO oscillation waveform
of the PLL detector
ensure low distortion sound.
Program function
Using the program function, you can automatically tune in
up to four stations which
have been
memorized
in any
sequence you want. Stations will be received one by one as
the power is turned on and off by an optional audio timer.
SAFETY-RELATED
COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK A\ OR DOTTED LINE
WITH MARK
A\ ON THE SCHEMATIC DIAGRAMS AND IN
THE
PARTS
LIST ARE
CRITICAL TO SAFE
OPERATION.
REPLACE
THESE
COMPONENTS
WITH
SONY
PARTS
WHOSE
PART NUMBERS
APPEAR
AS SHOWN
IN THIS
MANUAL
OR IN SUPPLEMENTS
PUBLISHED BY SONY.
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