Sony Walkman WM-SR10, Service Manual

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16 16
WM-SR10
6-6. IC Block Diagrams
IC1 TA2111FN (EL) IC151 LM4871MM
IC301 LB8115W-NA-TLM IC501 TA8155FN (ER)
FM-RF IN
GND
AGC
GND2
TUN-LED
ST
-IND
QUAD
1 2
LPF3
MIX
3 4 5
VCC2
AM IF IN FM IF IN
6 7 8 9 10 11 12
LP1 MO-ST L OUT R OUT
13 14 15
AM OSC FM OSC VCC1 FM-RF OUT AM-RF IN
20 21 22 23 24
DET
-OUT
AFC
18 19
LP2 BAND MPX-IN
16 17
FM
IF
FM
RF
FM
IF
AM
IF
AF
FM DET
LEVEL
DET
ST/MO
FM/AM
TUNE
LED
FM
MUTE
ST
LED
AM DET
FM OSC
AM OSC
FM MIX
AM MIX
AGC
VCO
DIVIDE
DECODE
5
6
7
4
3
2
SHUTDOWN 8 VO2
AV=-1
VO1
GND
VDD
VDD/2
BIAS 1
BYPASS
+IN
-IN
1
2
36
35
34
33
32
31
30
29
28
27
26
25
13 14 15 16 17 18 19 20 21 22 23 24
48 47 46 45 44 43 42 41 40 39 38 37
COM
RI
VREF
POWER-OUT
(COM)
POWER-OUT
(R)
VCC
POWER-MUTE POWER-IN
(L)
POWER-IN
(R)
MIX-OUT
(L)
MIX-OUT (R)
LP.2
H.PIN (R)
H.PIN (L)
DET-OUT
M-VREF
IN
+
VSP
MIX-IN (R)
MIX-IN (L)
L. B-SW
M-GND
R.P-REF SYSTEM
POWER-OUT
(L)
POWER-GND
M-VCC DR WOUT MPGND VOUT UOUT FC OUT OSC UB VB WB
3
4
5
6
7
8
9
10
11
12
PRE-NF (L)
PRE-OUT (R)
PRE-NF (R)
FWDIN (R)
REVIN (R)
REVIN (L)
FWDIN (L)
S/S
PRE-GND
PRE-OUT (L)
BIAS
R.F
REF
SYS
CONT
DET
VREF
SPEED
LOW
BOOST
PRE DRIVER
OPERATION LOGIC
OSC
PULSE DET
REF
VOLTAGE
REF VOLTAGE
FOR SPEED CONTROL
CURRENT
DET
OPERATION
DET
FWD/
REV
FREQ
CARC.
+
–
5
6
7
8
9
10
11
12
4
3
2
1
20
19
18
17
16
15
14
13
21
22
23
24 VCC (REC)
REC OUT (L)
REC OUT (R)
VREF
PB NF (L)
PB OUT (L)
PB OUT (R)
PB NF (R)
REC SW
PW SW
PB IN (L)
PB IN (R)
ALC
VCC
MIC NF (L)
MIC IN (R)
MIC NF (R)
MIC OUT (R)
MIC OUT (L)
LINE SW
BUF IN (L)
BUF IN (R)
MIC IN (L)
GND
ALC
DET
ALC
VREF
RADIO / TAPE
ALC
REC / PB
PW SW
REC AMP
PB AMP
PB AMP