Sony WM-EX621 - Technical Diagrams and Schematics; Block and IC Diagrams

1313
WM-EX621
6-1. BLOCK DIAGRAM
SECTION 6
DIAGRAMS
+
–
PREAMP
AMS
AGC
DET
BEEP
V/I
EQ
METAL
CONTROL
SPEED
CONTROL
DIRECTION CONTROL
PHOTO REFLECTOR
SWITCH & BUFFER
Q702
PLUNGER
DRIVE
Q701
AVLS CONTROL
SWITCH
Q304
MEGA BASS/GROOVE
SWITCHING
Q303
RIPPLE FILTER
Q301
RESET SIGNAL
GENERATOR
IC703
REGULATOR
IC704
Q604
MOTOR
CONTROL SWITCH
ROTATION DETECT
SENSOR
PH701
CAPSTAN/REEL
MOTOR DRIVE
IC601
SYSTEM CONTROLLER
IC701
S702 – 704
M901
(CAPSTAN/REEL)
HP901
(PLAYBACK)
AUDIO MASTER AMP
IC301
• SIGNAL PATH
: PLAYBACK
R-ch is omitted due to same as L-ch.
MOTOR
DRIVE
CIRCUIT
SWITCH &
LOGIC
CIRCUIT
BIAS
REFERENCE
VOLTAGE
OSC
CIRCUIT
REVIVE/GROOVE
SWITCHING
Q302
DC/DC
CONVERTER
IC702
DRY BATTERY
SIZE “AA”
(IEC DESIGNATION R6)
1PC. 1.5V
BATTERY PACK
(NI-CD)
(NC-6WM 1.2V)
VDD B+
DDC B+
BATT B+
BATT
B+
X701
32.768kHz
Q603
SPEED
CONTROL
SWITCH
TH601
TAPE SPEED
RV601
START
VREF
IN+
COMPARATOR
VSP
OUT
VCC
DATA
REMOTE
GND
BATT B+
BATT B+
BASE
PW OUT-L
PW OUT-R
PW OUT-C
POWER AMP
POWER AMP
POWER AMP
PW
NF-L
BASS BOOST
AMP
PW
IN-L
PW
IN-C
BST
OUT
VOL
RV301
HOLD
S707
2
J301
S901-2
(ATS)
PRE
OUT-L
MTL
DRV-L
FWD
IN-L
REV
IN-L
L-CH
R-CH
FWD
L-CH
R-CH
REV
R-CH
R-CH
R-CH
R-CH
R-CH
R-CH
R-CH
R-CH
S701
(DIRECTION)
OSC
MOTOR RESTART
MOTOR DIR
AMS OUT
F/R SW
M/N SW
35
8
7
5
DR
6
10
9
11
W
3
V
1
U
WV
U
19
48
XT0
28
XT1
29 46
18
VCC
19
RF OUT
17
20
22
21
29
EQ-L
30
40
BST SW
43
AGC IN
35
BEEP
39
28
32
33
AMS
IN
12
7
8
4644
F/R CTL
9
CASSETTE SW
5
REV SW
4
CENTER SW
3
FWD SW
2
CUE-REVIEW
AVLS
CTL
38
R-CH
47
MEGA BASS CTL
8
AMS IN
39
BOOST CTL
10
REVIVE
CTL
SPEED CTL
7
44
MOTOR CTL
45
VDD
23
SET STOP 1
13
BEEP
36
MT SW
41
MUTE CTL
12
PW SW
42
AMP CTL
11
DATA/RMUM
6
KEY IN
16
1
5
S901-1
(TAPE DETECT)
+
+
+
FWD
STOP
REV
OFF
HOLD
IN PHOTO
37
PHOTO CTL
18
PM CTL
PM901
(PLUNGER)
17
DDC B+
DDC
B+
SET STOP 2
14
BATT DET
15
RESET
+
CUE REVIEW
VOLUM SWITCH
Q306