Block Diagram - Main Section - Sony WALKMAN WM-SR10 Service Manual

WM-SR10
6-2. Block Diagram – Main Section –
TU L, TU R
B
IC501 (1/2)
MIC AMP, ALC
J501
MIC
(PLUG IN POWER) IN (L)
MIC
21 ALC
MIC
AMP
MIC
IN (R)
MIC
19 ALC
AMP
MIC501
FLAT MIC
TUNER MUTING
C
S301 (1/4)
(REC/PB)
REC PB
HRP901
(REC/PB)
9
L-CH
10
S301 (2/4)
(REC/PB)
REC PB
11
R-CH
12
VREF 13 VREF
HE901
(ERASE)
S301 (3/4)
(REC/PB)
REC PB
T551
BIAS OSC
Q553
REC
BIAS OSC
Q551
ISS
SWITCH
3
S551
2
ISS
MAIN VCC
1
BATT B+
COM
M601
(CAPSTAN/REEL)
U
W V
TU L TU R
IC501 (2/2)
REC/PB AMP
MIC
BUF PB
OUT (L) IN (L) OUT (L)
+
16 14 PB AMP
REC
OUT (L)
REC AMP
MIC BUF PB
OUT (R)
OUT (R) IN (R)
+
17 13 PB AMP
REC
OUT (R)
REC AMP
Q706
MUTING
LINE SW
MODE
REC SW
CONTROL
CIRCUIT
PW SW
MUTING
IC301 (1/2)
PRE AMP, POWER AMP, MEGA-BASS
FWDIN (L)
PRE-OUT (L)
EQ
+
5
AMP
REVIN (L)
EQ
PRE-NF (L)
6
PRE-NF (R)
8
FWDIN (R)
EQ
PRE-OUT (R)
EQ
+
7
AMP
REVIN (R)
S301 (4/4) LOW
(REC/PB)
BOOST
REC PB
MAIN VCC
32
PB/REC
S303
SOUND BOOST
OFF
ON
TH601
COMPARATOR
IN+
35
OUT +
RV601
37
VSP
–
36
TAPE SPEED
SPEED
34
CONTROL
M-VREF
UOUT
39
MOTOR SWITCH & BIAS
OSC S/S
VOUT
40 DRIVE LOGIC REFERENCE 3
CIRCUIT
WOUT
VOLTAGE
CIRCUIT CIRCUIT
41
IC301 (2/2)
CAPSTAN/REEL
MOTOR DRIVE
47
8
2
9
3
S304
AVLS
NORM
15 TU B+
MAIN VCC
11 PB/REC
LIMIT
12 REC VCC
Q705
H/P MUTE
SWITCH
RV301
MIX-IN (L) MIX 1
30 MIX-OUT (L)
+
24
–
Q302
AVLS
SWITCH
MIX 2
– MIX-OUT (R)
MIX-IN (R)
25
+
29
NF
–
+
L
DET
R
CONTROL
VREF
21 15
MAIN VCC
Q704
PRE MUTE D701
SWITCH
Q707
D35
POWER MUTE
H/P MUTE
SWITCH
D32
MUTING
MAIN VCC
Q722
PB/REC MUTING
CONTROL
Q720
MUTING
CONTROL
Q703, 711
PB/REC
START/STOP
CONTROL SWITCH
Q31, 709
MAIN VCC
MUTING
Q702
CONTROL
PB/REC PAUSE
Q719
S702 OFF
MUTING
PAUSE
CONTROL
MAIN VCC
ON
12 12
IC151
POWER AMP
Q252
4
–
PRE AMP
+
3
–
+
BYPASS
2
SHUT DOWN
1
S701 (1/2) S701 (2/2)
MAIN VCC
i
BATT B+
SPEAKER
H/P MUTE
VOL
POWER POWER
OUT (L)
IN (L) POWER
22 16
AMP
+
POWER POWER
IN (R) OUT (R)
POWER
23 20
AMP
POWER
VREF 18
AMP
MUTING
PB/REC
Q712, 713
TU B+ TU VCC
B+ SWITCH
D401
BATT
Q701,715
REC VCC
B+ SWITCH
PB/REC
Q401, 403
Q501, 502
MIC B+ RIPPLE
B+ SWITCH
FILTER
REC VCC
Q402
SWITCH
MAIN VCC
D302 D301
TU B+
S704
(TAPE POWER)
(ON at FF/REW/PLAY modes.)
AM
D
FM
E
Q714
MUTING
5 SP251
(SPEAKER)
8
D234
+
Q717,718
MUTING
CONTROL
TU B+
Q710
SWITCH
PB/REC
MUTING
J301
i
(HEADPHONE)
ANT
A
• SIGNAL PATH
: TUNER (FM/AM)
: TAPE PLAY
: TAPE REC
BATT B+
: MIC INPUT
S703
(FUNCTION)
FM
AM
DRY BATTERY
SIZE ''AA''
TAPE
(IEC DESIGNATION R6)
(RADIO OFF)
2PCS. 3V
J401
DC IN 3V
+
–