Sony Walkman WM-FX855, Service Manual

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IC Block Diagrams
– AUDIO Section –
IC301 TA2103F
+
–
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
AGC
DET
BASS
SW
BST
RIPPLE
FILTER MTL
DRV PRE
V REF
PRE
CH-A CH-B
AGC DET
AMS
SW
EK
CH-A NR
CH-B
NR
C
H
D
G F
SW
ALC
BEEP
+ –
PW
B
+ –
PW
A
+
–
PW C
V / I
PW
V REF
ADD B ADD A
MIX
PRE NF-L
PRE NF-R
F/R SW
DET 1
AMS OUT
AMS HPF
PRE SW
EK IN-R
BUF IN-R
NR SW
BUF IN-L
EK IN-L
PRE OUT-L
PRE OUT-R
MTL DRV-L
MTL DRV-R
HIGH SW BST SW PW IN-C BST OUT BST NF EQ-R PW NF-R VCC1 PRE GND 3 IN-R REV IN-R FWD DC SRV-R PRE VREF DC SRV-L IN-R FWD IN-L REV
DET 2
AGC IN
RF OUT
BASE
VCC
PW GND
PW OUT-R
PW OUT-C
PW OUT-L
PW SW
MUTE SW
BEEP
TC
AVLS DET
AVLS IN
AVLS OUT
EQ-L
PW NF-L
PW IN-L
PRE GND
PW IN-R
PW VREF
RF IN
NR OUT-R
SC IN-R
HPF-R
RECT-R
PRE GND 2
RECT-L
HPF-L
SC IN-L
NR OUT-L
B
IC703 PST9010NL
IC704 PST9015NL
IC601 MM1279XVBE
IC801 MPC1850DTBEL
2
3
4
5
6
7
8 9
10
14
13
12
11
C3H
VG
C2L
NC
RO
NC
RI
NC
C2H
C1H
GND
COL
VC
COH
VOUT
MODE
VC
VC
VC
F/F F/F
f1
f2
VC
f1/f2
CHARGE PUMP
CIRCUIT
x 2
16
15
1
OSC
CHARGE PUMP
CIRCUIT
x 4