Sony WM-FX671, Service Manual

Page: 18 / 28

— 26 —
8 9 10 14 13 12
2 1 3
A-CH BLOCK
11
7 6 5 4
G2 G1 V/I
WEIGHT
BIAS
CIRCUIT
+
–
+
–
GM
SUM
V+
SW VEXT OUT
A
DCA
DET
A
INA
GND IREF
VREF
OUTB
DCB
DETB
INB
B-CH BLOCK: SAME AS A-CH.
PRE A
PRE B
MIX
PW B
PW A
PW C
BST
MT TC
BASE
RF IN
PW GND
OUT B
OUT C
OUT A
VCC
RF OUT
VREF OUT
BST NF BST OUT PW IN C LPF EQ A PW NF A PW IN A PW IN B PW NF B
3
IN A-R
5
PRE NF-A
6
PRE OUT A
7
MTL DRV A
8
MTL DRV B
9
PRE OUT B
10
PRE NF-B
11
AMS IN
12
IN B-R
4
IN B-F
2
IN A-F
1
21
20
19
18
17
GND 16
AMS DET 15
AMS MIX 14
AMS SW 13
22
23
24
38
C-AMP SW 37
PW SW 42
MT SW 41
F/R SW 44
BST SW
43
M/N SW 46
PRE GND 47
VREF IN 48
PRE SW 45
AMS OUT 40
BEEP 39
26 27 28 29 30 31 32 33 34
DET
36
AGC IN
35
+
–
+ –
+ – + –
+
–
+
–
EQ B
25
RIPPLE
FILTER
AGC
DET
BEEP
VREF
SWITCH
COMPARATOR
MTL DRV
IC301 TA2123AF (EL)
IC601 MM1279XVBE