Diagrams; Block Diagram - Sony WM-EX921 Service Manual

6-1.

BLOCK DIAGRAM

AUDIO MASTER AMP
IC301 (1/2)
HP901
(PLAYBACK)
FWD
PRE
IN-L
L-CH 1 OUT-L
PREAMP 7
5
FWD
REV
IN-L
R-CH R-CH
METAL EQ
R-CH AMP CONTROL
L-CH
REV
METAL
SWITCH
R-CH R-CH
MTL
DRV-R
METAL
9
CONTROL
44 46
S704 (2/2)
(ATS)
S704 (1/2)
(TAPE DETECT)
BP1
9 5
PM701
(PLUNGER)
PLUNGER
DRIVE 17 PM CTL
Q701
19
M601
(CAPSTAN/REEL)
U
34
V
32
W
31
CAPSTAIN/REEL
MOTOR CONTROL
Q603 (1/2)
35
36
1
TU
28
CAPSTAIN/REEL
TV
MOTOR CONTROL 29
TW
Q603 (2/2)
30
COM
SECTION 6

DIAGRAMS

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