Sony Walkman WM-GX221, Service Manual

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16 16
WM-GX221
6-6. IC BLOCK DIAGRAMS
IC1 TA2111FN (EL)
IC151 LM4863MT
IC301 LB8115W-NA-TLM IC501 TA8155FN (ER)
24 23 22 21 20 19 18 17 16 15 14
11 10 9 8 7 6 5 4 3 2 1 12
13
AM
MIX
FM
MIX
AM
OSC
FM
OSC
AF
BUFF
AM
DET
FM
IF
AM
IF
LEVEL
DET
FM
DET
TUN
LED ST
LED
AGC
FM
RF
FM-RF IN GND MIX AGC VCC 2 GND2 TUN- LED ST-LED QUAD LPF3 AM
IF IN
FM
IF IN
FM
MUTE
ST/MO
FM/AM
AF
VCO
DECODE
DIVIDE
AM-RF IN FM-RF OUT FM OSC AM OSC AFC
LP2
BAND
LP1
MO-ST L OUT R OUT VCC 1 DET-OUT
MPX-IN
5
6
7
8
9
10
4
3
2
1
16
15
14
13
12
11
17
18
19
20
SHUTDOWN
+OUT A
-OUT A
GND
GND
GND
VDD
-IN A
+IN A
GND
HP-IN
+OUT B
-OUT B
BYPASS
GND
GND
VDD
-IN B
+IN B
GND
CONTROL
CIRCUIT
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-VREF
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
PLUSE 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 OUR (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