Ic Block Diagrams - Sony WM-GX680 Service Manual

6-5. IC BLOCK DIAGRAMS

IC1 TA7371AF-EL IC501 LA3235W
8 7 6 5
REG OSC
N.C. 37
RF MIX
REF 38
1 2 3 4
39
V REF
40
GND
REV REC L 41
REV REC R 42
FWD REC R 43
44
FWD REC L
VCC2 45
MONITOR L 46
47
MONITOR R
N.C. 48
IC2 TA2022AFN-EL
SWITCH
PILOT
ø 0 VCO ø 90
FM
DIVIDE
PRE
AM
DECODE
AF
AM DET
FM DET
FM AM
STOP
OSC MIX AGC
IF IF
PULSE
36 35 34 33 32 31 30 29 28 27 26 25
SYSTEM CONTROL
VCC2
V REF
ALC
AMP
REV
REC
ALC
AMP
AMP
FWD
REC
AMP
MONITOR
AMP
MIC DET
REC BIAS REGULATOR
REGULATOR
1 2 3 4 5 6 7 8 9 10 11 12
IC302 NJM2185AV-TE2
14 13 12 11 10 9
ST
IND G2
+
BIAS
–
CIRCUIT
SUM
WEIGHT
AM
IF
A-CH BLOCK
B-CH BLOCK: SAME AS A-CH.
1 2 3 4 5 6
— 23 —
IC301 TA2123AF (EL)
24 GND
23 MIC IN L
22 NF L
C-AMP SW 37
L
MT TC
21
RADIO IN L
BEEP 39
20 MIC IN R
AMS OUT 40
19 NF R
R
18 RADIO IN R
MT SW 41
17
MIC OUT R PW SW 42
BST SW 43
16 MIC OUT L
F/R SW 44
PRE SW 45
15 REC IN L M/N SW 46
PRE GND 47
14
REC IN R
VREF IN 48
13 N.C.
IC601 MM1279XVBE
8
PW
G1 V/I
GND
GM
OSC
DR
VREF
START
7
VSP
IN+ 10
36 35 34 33 32 31 30 29 28 27 26
BST
AGC
–
DET
+
–
+
38
PW C +
–
BEEP
SWITCH
PRE A PRE B
VREF
MTL DRV
1 2 3 4 5 6 7 8 9
V 1
2
PRE DRIVER
MOTIVE
W 3
CONTROL
4
CIRCUIT
MOTIVE/
5 MOTIVE
SOFT SWITCH
OSC
LOGIC
6
BIAS
7
SPEED CURRENT
REFERENCE
CONTROL CONTROL
8
VOLTAGE
OUTPUT
INVERTER
BIAS
9 –
+
— 24 —
25
24 RF IN
23 PW GND
22 OUT B
PW B
21 OUT C
PW A
20 OUT A
19 VCC
RIPPLE
BASE
18
FILTER
17 RF OUT
16 GND
COMPARATOR 15 AMS DET
14 AMS MIX
13 AMS SW
MIX
10 11 12
20 PV
19 U
18 PU
17 GND
16 VCC
FC
15
TC1
14
13 TC2
12 RI
11
OUT