Ic Block Diagrams - Sony WM-GX677 Service Manual

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6-5. IC BLOCK DIAGRAMS

IC1 TA7371AF-EL
8 7 6
REG
RF MIX
1 2 3
TE
L 13942296513
IC2 TA2022AFN-EL
SWITCH
FM
IF
FM DET
FM
OSC MIX
IF
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IC501 LA3235W
5
OSC
N.C.
REF
4
V REF
GND
REV REC L
REV REC R
FWD REC R
FWD REC L
VCC2
MONITOR L
MONITOR R
N.C.
PILOT
ø 0 VCO ø 90
FM
DEVIDE
PRE
AM
DECODE
AM DET
AM
AGC
IF
x ao
y
i
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8
36 35 34 33 32
SYSTEM CONTROL
37
38
V REF
39
40
41
REV
REC
AMP
42
43
FWD
REC
AMP
44
45
46
MONITOR
AMP
47
48
MIC
REC BIAS REGULATOR
REGULATOR
1 2 3 4 5
Q Q
3 6 7 1 3
IC302 NJM2185AV-TE2
14
ST
IND
AM
IF
STOP
PULSE
1
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— 25 —
2 9 9 4 2 8
31 30 29 28 27 26
VCC2
DET
6 7 8 9 10 11
1 5 0 5 8 2 9 9 4
13 12 11 10 9
G2
+
BIAS
–
CIRCUIT
SUM
WEIGHT
A-CH BLOCK
B-CH BLOCK: SAME AS A-CH.
2 3 4 5 6
m
co
9 9
25
24 GND
23 MIC IN L
ALC
NF L
AMP 22
L
21 RADIO IN L
20
MIC IN R
ALC
AMP 19
NF R
R
18 RADIO IN R
17
MIC OUT R
16 MIC OUT L
15
REC IN L
14
REC IN R
13 N.C.
12
2 8 9 9
8
G1 V/I
GM
7