Sony WM-EX621 - Schematic Diagrams; IC Block Diagrams

1414
WM-EX621
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
r
: Through hole.
• : Pattern of the rear side.
Caution:
Pattern face side: Parts on the pattern face side seen from
(SIDE B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(SIDE A) the parts face are indicated.
6-2. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• % : indicates tolerance.
• C : panel designation.
• Y : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 1.5V and fed with regulated dc power
supply from battery terminal.
no mark : PB
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
E : PB
• Abbreviation
FR : French model
6-3. IC BLOCK DIAGRAMS
PRE A
PRE B
MIX
PW B
PW A
PW C
BST
MT TC
BASE
RF IN
PW GND
OUT B
OUT C
OUT A
VCC
RF OUT
VREF OUT
BST NF
BST OUT
PW IN C
LPF
EQ A
PW NF A PW IN A
PW IN B
PW NF B
3
IN A-R
5
PRE NF-A
6
PRE OUT A
7
MTL DRV A
8
MTL DRV B
9
PRE OUT B
10
PRE NF-B
11
AMS IN
12
IN B-R
4
IN B-F
2
IN A-F
1
21
20
19
18
17
GND
16
AMS DET
15
AMS MIX
14
AMS SW
13
22
23
24
38
C-AMP SW
37
PW SW
42
MT SW
41
F/R SW
44
BST SW
43
M/N SW
46
PRE GND
47
VREF IN
48
PRE SW
45
AMS OUT
40
BEEP
39
262728293031323334
DET
36
AGC IN
35
+
–
+ –
+ –
+ –
+
–
+
–
EQ B
25
RIPPLE
FILTER
AGC
DET
BEEP
VREF
SWITCH
COMPARATOR
MTL DRV
V
1
PW
2
W
3
GND
4
OSC
5
DR
6
VREF
7
START
8
VSP
9
IN+
10
PV
20
U
19
PU
18
GND
17
VCC
16
FC
15
TC1
14
TC2
13
R1
12
OUT
11
MOTIVE
CONTROL
CIRCUIT
MOTIVE/
OSC
MOTIVE
LOGIC
SOFT SWITCH
PRE DRIVER
INVERTER
BIAS
REFERENCE
VOLTAGE
SPEED
CONTROL
CURRENT
CONTROL
OUTPUT
BIAS
+
–
IC301 TA2123AF (EL)
IC601 MM1279XVBE