Ic Block Diagrams - Sony Walkman WM-GX670 Service Manual

6-5. IC BLOCK DIAGRAMS

IC1 TA7371AF-EL IC2
8 7 6 5
REG OSC
RF MIX
N.C. 37
1 2 3 4
REF 38
V REF 39
GND 40
REV REC L 41
42
REV REC R
43
FWD REC R
FWD REC L 44
VCC2 45
MONITOR L 46
MONITOR R 47
N.C. 48
IC302 NJM2185AV-TE2
1
V
PW 2
PRE DRIVER
MOTIVE
W 3
CONTROL
GND 4
CIRCUIT
MOTIVE/
MOTIVE
OSC 5
SOFT SWITCH
OSC
LOGIC
DR 6
BIAS
7
VREF
SPEED CURRENT
REFERENCE
CONTROL
CONTROL
START 8
VOLTAGE
OUTPUT
INVERTER
BIAS
VSP 9 –
+
IN+ 10
TA2022AFN-EL
36 35 34 33 32 31 30 29 28 27 26 25
SYSTEM CONTROL
VCC2
V REF
ALC
AMP
L
REV
REC
ALC
AMP
AMP
R
FWD
REC
AMP
MONITOR
AMP
MIC DET
REC BIAS REGULATOR
REGULATOR
1 2 3 4 5 6 7 8 9 10 11 12
IC501 LA3235W
20 PV
19 U
SWITCH
PILOT
ø 0 VCO
FM
PRE
AM
FM
IF
18 PU
AM DET
17 GND
16 VCC
FM DET
15 FC
14 TC1
13 TC2
FM AM
OSC MIX AGC
IF IF
12 R1
11 OUT
— 25 —
24 GND
23 MIC IN L
22 NF L
21 RADIO IN L
C-AMP SW 37
MT TC
20 MIC IN R
BEEP 39
19
NF R
AMS OUT 40
18
RADIO IN R
17 MIC OUT R
MT SW 41
16 MIC OUT L
PW SW 42
BST SW 43
15 REC IN L
F/R SW 44
PRE SW 45
14 REC IN R
M/N SW 46
PRE GND 47
13 N.C.
VREF IN 48
ø 90 ST
IND
DEVIDE
DECODE
AM
IF
STOP
PULSE
IC301 TA2123F (EL)
36 35 34 33 32 31 30 29 28 27 26
BST
AGC
–
DET
+
–
+
38
PW C +
–
BEEP
SWITCH
COMPARATOR
PRE A PRE B
VREF
MTL DRV
1 2 3 4 5 6 7 8 9 10 11
IC601 MM1279XVBE
14 13 12 11 10 9 8
G2 G1 V/I
+
BIAS
–
CIRCUIT
SUM
WEIGHT
–
+
GM
A-CH BLOCK
B-CH BLOCK: SAME AS A-CH.
1 2 3 4 5 6 7
— 26 —
25
24 RF IN
23 PW GND
OUT B
22
PW B
21 OUT C
PW A
20 OUT A
19 VCC
RIPPLE
18 BASE
FILTER
RF OUT
17
16 GND
15 AMS DET
AMS MIX
14
13 AMS SW
MIX
12