Sony Walkman WM-GX677, Руководство по обслуживанию

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6-5. IC BLOCK DIAGRAMS
IC302 NJM2185AV-TE2 IC2 TA2022AFN-EL
IC501 LA3235W IC1 TA7371AF-EL
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
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.
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
VREF
OSC
VCC
GND
IF OUT IF REQ
SP
OUT
1 2
FM IF IN
MIX
3 4 5
AM IF IN
QUAD
AGC
6 7 8 9
10 11 12
ROUT LOUT ST
IND
13 14 15
MPX IN PILOT IN DET OUT IN SW AM RF IN
20 21 22 23 24
LPF 2A LPF 2B
18 19
LPF1 VCO
16 17
STOP
PULSE
OSC AGC MIX
FM
IF
FM
IF
AM
IF
AM
IF
FM DET
SWITCH
AM DET
DEVIDE
DECODE
PRE
VCO 0 90
FM
AM
PILOT
ST
IND
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