Read Sony MHC-W550 / STR-W550 Service Manual online
– 33 –
4-10. IC BLOCK DIAGRAMS
PHASE DETECTOR
CHARGE PUMP
SWALLOW COUNTER
1/16, 1/17 4BITS
12BITS PROGRAMMABLE
DRIVER
UNIVERSAL
COUNTER
REFERENCE
DIVIDER
POWER
ON
RESET
1/2
C
2
B
I/F
1
2
3 4 5 6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
21
22
23
24
XOUT
VSS
AOUT2
AIN2
PD2
PD1
AIN1
AOUT1
VDD
FMIN
AMIN
IO2
XIN
D0
CL
D1
CE
BO5
BO1
BO2
BO3
BO4
IO1
IFIN
UNLOCK
DETECTOR
DATA SHIFT REGISTER LATCH
IC21
LC72130
ALC
BUFF
AM
OSC
AM
MIX
AM
RF. AMP
AGC
S METER
LEVEL
DET
FM
IF
AM
DET
S-CURVE
AM/FM
IF
BUFF
REG
TUNING
DRIVE
COMP
GND
AM/FM
SW
VCC
PHASE
DET
PILOT
DET
VCO
FF
STEREO
DRIVE
TRIG
STEREO
SW
MUTE
FF
FF
FM
IF
FM
DET
DECODER
ANTI BIRDIE
1
2 3
4
5
6
7
8
9
10
20
19
18
17 16
15
14
13
12
11
21
22
23
24
25
26
27
28
29
30
FM-SD
AM-OSC
FM-AFC
AM-RF-IN
AGC
AM. CUT
AM/FM
VCO
MPX-IN
OUT R
OUT L
AMP-IN R
AMP-IN L
R
L
VCO-STOP
ST-LED
AM/FM
AM. SD
AM. SD
IF-BUFF
VCC
DET
FM-IN
AM-MIX
IF
REG
AM-IF
GND
TU-LED
FM
AM
IC41
LA1835
IC1701 IR3R42
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
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