Sony st s 570 es service manual

Page 2

ST- $570ES

Section _T_it_|§ P_ag_§

1 GENERAL ......................................... 3

2- ADJUSTMENTS """"""""""""""""""" 7 The detected revolution of the tuning knob is under
digital-control so that you can tune in the correct frequency

3- DIAGRAM and stored station easily.

3 1- BLOCK DIAGRAM """"""""""""""" 10 This system employs a variable muting function that adjusts

32- SCHEMATIC DLAGRAMS """"""""""" 12 itself to the rotation speed of the TUNING knob and

3-3 PRINTED WIRING BOARDS 15 changes the muting time. This function realizes a feeling

34. 1C BLOCK DIAGRAMS """""""""""" 18 which is very close to that of an analog type tuner.

3-5. FM FRONT-END (FEIOI) --------------------- 20

36. SEMICONDUCTOR LEAD LAYOUTS ---------- 20

, Direct comparator technology '

4. EXPLODED VIEWS An employed PLL [0 allows the comparison frequency to be

OVERALL SECTION """""""""""""""" 21 as high as the channel spacing frequency, thus eliminating
the tendency of a low comparison frequency to slip into the
5 ELECTRICAL PARTS LIST ------------------------ 22 audio range and degrade the signal-to-noise ratio.

RDS (Radio Data System) Service Reception .
Function (for Customers of ST-SS7OES ).

Among the various RDS services, the following functions
are available

PS (Program Service name). CT (Clock Time) and PTY
(PTY alarm), TP (Traffic Program identification) and TA
(Traffic Announcement) service, Pl (Program Identification)
and AF (Alternative Frequency list) services.

SAFETY~FIELATED COMPONENT WARNINGII

COMPONENTS IDENTIFIED BY MARK A 0R DOTTED
LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL T0 SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.