Sony Walkman WM-EX921, Service Manual

Page: 13 / 30

WM-EX921
13 13
PREAMP
METAL
CONTROL
HP901
(PLAYBACK)
AUDIO MASTER AMP
IC301 (1/2)
S704 (2/2)
(ATS)
PRE
OUT-L
MTL
DRV-R
FWD
IN-L
REV
IN-L
L-CH
R-CH
FWD
L-CH
R-CH
REV
R-CH
R-CH
R-CH
F/R SW M/N SW
7
9
46
1
5
S704 (1/2)
(TAPE DETECT)
F/R CTL
9
17
CASSETTE SW
5
METAL
SWITCH
Q306
METAL EQ
AMP CONTROL
Q305
PRE OUT
CONTROL
Q315
R-CH
FWD SW
CENTER SW
REV SW
S702
(DIRECTION)
FWD STOP REV
2 3 4
MAX NOR MIN
4 5
14
IN-L OUL-L
VCC
B+
SWITCH
Q316
DOLBY NR AMP
IC303
DDC B+
VOLUME MIN
SWITCH
Q312, 314
VOLUME MAX
SWITCH
Q311
R-CH R-CH
R-CH
DDC B+
S301
MUTING
Q317
DOLBY CTL
20
AUDIO A
T
T
REVIVE CTL
MEGA BASS CTL
AMS IN
BOOST CTL
MUTE CTL
BEEP
DA
TA/RMUM
KEY IN
XT0 XT1
1 7
28
29
30
MEGA BASS/
GROOVE
SWITCHING
Q302
REVIVE/
GROOVE
SWITCHING
Q304
8
R-CH
AMS
V/I
BASS BOOST
AMP
BST
OUT
AMS OUT
40
33
AMS
IN
12
POWER AMP
POWER AMP
EQ-L
PW IN-C
PW
NF-L
PW
IN-L
32
43 41 42
R-CH
R-CH
AGC DET 35
AGC
IN
21
PW
OUT-C
20
17 18 19
PW
OUT-L
BEEP
i
39
39 10 12 36
BST SW MT SW PW SW BEEP
R-CH
BATT B+ VCC
DATA
REMO
GND
+
RIPPLE FILTER
Q309
BATT B+
AUDIO MASTER AMP
IC301 (2/2)
RF OUT
BASE
VCC
J301
6 16 28 29
X701
32.768kHz
PLUNGER
DRIVE
Q701
PM701
(PLUNGER)
PM CTL
DC/DC
CONVERTER
IC701
BATT B+
RESET SIGNAL
GENERATOR
IC704
35 15 11
DDC B+
DDC
B+
ROTATION
DETECT SENSOR
(S REEL)
PH701
19
CAPSTAN/REEL
MOTOR SERVO
IC601
DECODER
SOFT
CLIP
13
32
31
35
36
1
28
29
30
P-SIG
ENCODER
COMPARATOR
PULSE
∆
/
∆
t
BUFFER
COMPARATOR
14
15
17
CAPSTAN/REEL
MOTOR
START SWITCH
Q602
BUFFER VI
16
4
5
6
POWER
CURRENT AMP
21
9
7
TAPE SPEED
RV601
CONTROL
BLOCK
8
10
40
19
CAPSTAIN/REEL
MOTOR CONTROL
Q603 (2/2)
CAPSTAIN/REEL
MOTOR CONTROL
Q603 (1/2)
M601
(CAPSTAN/REEL)
41 18 47 46 45 42 44 43
U
V
W
TU
TV
TW
COM
UOUT
VOUT
WOUT
US
VS
WS
UT
VT
WT
MC
ENTER
PSIG
PW
VC
IV
VI2
VI1
UIN
VIN
WIN
U
V
W
ICI1
DR
CTRL1
CTRL2
CTRL1
CTRL2
U V W CTRL1 CTRL2
RESET BATT DET AMP CTL PHOTO CTL P-SIG MOTOR START SPEED CTL MOTOR U MOTOR V MOTOR W MOTOR DIR CTRL1 CTRL2
SYSTEM CONTROLLER
IC705
44
37
PHOTO IN (S)
•
SIGNAL PATH
•
R-ch is omitted due to same as L-ch.
: PLAYBACK
PHOTO REFLECTOR
SWITCH & BUFFER
Q704
BP1
34
+
AVLS
VOL
(HEADPHONE WITH REMOTE CONTROL)
F701
PUSH bB / x
REW
S703
(JOG LEVER)
CHARGING
STAND
DC IN 4.5V
–
+
RECHARGEABLE
BATTERY
NH-14WM
1.2V 1350mAh
CHARGE
L701
D702
FF
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM