Ic Block Diagrams; Tuner Section - Sony ST-SE520 Service Manual

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4-7. IC BLOCK DIAGRAMS

• Tuner section

IC201 LA1235
16 15 14
MUTING
CIRCUIT
LEVEL METER
DET
IF OFF
NULL METER
SHORTING
FM IF AMP
LIMITER
GND
1 2 3 4
IC802 BU1922
16
1
13 12 11 10 9
B+
DETUNE
DET
DRIVE
QUADRATURE AF/NULL
DET
AF AMP
5 6
15 14 13
OSCILLATOR
QUALITY BIT
AND
GENERATOR
DIVIDER
BIPHASE
DEFFERENTIAL
SYMBOL
DECODER
DECODER
2 3 4
Digitized in Heiloo Netherland
IC901 LA5667
REG
1
METER
7 8
12 11
57kHz
RECONSTRUCTION
BANDPASS
FILTER
(8th ORDER)
CONTAS LOOP
VARIABLE AND
FIXED DIVIDER
CLOCK REGENERATION
AND SYNC
REFERENCE
VOLTAGE
5 6
CONTROL
REG
GND
2 3 4 5 6 7
10 9
TEST LOGIC AND OUTPUT
SELECTOR SWITCH
ANTI-
ALIASING
FILTER
CLOCKED
COMPARATOR
VP1
7 8
7/23/2017
11