Read Sony ST-SE520 (serv.man2) Service Manual online
– 17 –
4-6. IC BLOCK DIAGRAMS
• Tuner section
IC201 LA1235
3
6
11
2
5
8
1
4
14
15
12
9
10
16
13
7
FM IF AMP
LIMITER
AF/NULL
METER
QUADRATURE
DET
AF AMP
IF OFF
NULL METER
SHORTING
LEVEL
DET
METER
DRIVE
MUTING
CIRCUIT
CIRCUIT
DETUNE
DET
GND
B+
OSC
1/2
1/2
PHASE
WAVEFORM
SEP.
GATE
SAMPLE
& HOLD
BUFFER
REGULATOR
PHASE
COMPARATOR
PHASE
COMPARATOR 2
MUTE
TRIGGER
1
2
3
4
5
6 7
8
9
10
20
19 18
17
16
15
14 13
12
11
AMP
AMP
AMP
LAMP
VCO STOP
ST
LOUT
ROUT
LHC
RHC
POUT
IN
VCC
GND
VCO
LPF1A
LPF1B
DETIN
LPF2A
LPF2B
SUBIN
SUBOUT
MON
IC401 IR3R42
IC403 TC9215P
1
2
3
4
REG
GND
CONTROL
REG
5
6
7
IC901 LA5667
3
S10
SW1
SW2
4
S11
1
GND
2
OFF
5
C12
6
S20
7
S21
8
14
13
16
15
12
11
10
9
VSS
S41
S42
VDD
S40
S34
S32
S31
S30
SW3
SW3'
SW4'
SW4
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