Sony WM-FX671, Service Manual

Page: 17 / 28

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6-5. IC BLOCK DIAGRAMS
V
1
PW 2
W 3
GND 4
OSC 5
DR 6
VREF
7
START 8
VSP 9
IN+ 10
PV 20
U 19
PU 18
GND
17
VCC 16
FC 15
TC1 14
TC2 13
R1 12
OUT
11
MOTIVE
CONTROL
CIRCUIT
MOTIVE/
OSC
MOTIVE
LOGIC
SOFT SWITCH
PRE DRIVER
INVERTER
BIAS
REFERENCE
VOLTAGE
SPEED
CONTROL
CURRENT
CONTROL
OUTPUT
BIAS
+
–
IC302 NJM2185AV-TE2
37
38
39
40
41
42
43
44
45
46
47
48
24
23
22
21
20
19
18
17
16
15
14
13
1 2 3 4 5 6 7 8 9 10 11 12
35 36 34 33 32 31 30 29 28 27 26 25
N.C.
REF
V REF
GND
REV REC L
REV REC R
FWD REC R
FWD REC L
VCC2
MONITOR L
MONITOR R
N.C.
GND
MIC IN L
NF L
RADIO IN L
MIC IN R
NF R
RADIO IN R
MIC OUT R
MIC OUT L
REC IN L
REC IN R
N.C.
N.C. REC MUTE MIC/RADIO FWD/REV REC/PLAY CONT F CONT A
(FWD)
PLAY(REV)
(REV)
PLAY(FWD) PLAY(FWD)
(REV) (REV)
PLAY(FWD)
PLAY
REC
CONT B CONT C CONT D CONT E N.C.
N.C.
MIC REG REF
MIC REG
REC BIAS REG REF
REC BIAS REG
OSC
BASE VCC1
VCCRF
ALC
GND
N.C.
SYSTEM CONTROL
V REF
REV
REC
AMP
FWD
REC
AMP
MONITOR
AMP
DET MIC
REGULATOR
REC BIAS REGULATOR
ALC
AMP
L
ALC
AMP
R
VCC2
( ):REC
GND
AFC DIODE(A)
RF IN
OFC DIODE(C)
MIX OUT VCC OSC RF OUT
1 2 3 4
5 6 7 8
RF
REG
MIX
OSC
IC2 TA2022AFN-EL IC1 TA7371AF-EL