Audio Section - Sony WM-FX855 Service Manual

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