Sony WM-EX570 - Page 14

– 20 –
– 21 –
– 22 –
• Waveforms
1 IC701 #• (PHOTO IN)
500 mV/DIV, 50 ms/DIV
2 IC701 !∞ (XTB)
200 mV/DIV, 10 µs/DIV
100 ms
1.4 Vp-p
1 Vp-p
32.768 kHz
3 IC704 !§ (XT)
200 mV/DIV, 10 µs/DIV
4 IC704 @º (VCP)
500 mV/DIV, 500 µs/DIV
0.7 Vp-p
32.768 kHz
1.5 Vp-p
980 µ s
5 Q504 Base
200 mV/DIV, 500 µs/DIV
6 Q504 Collector
200 mV/DIV, 500 µs/DIV
0.6 Vp-p
980
µ s
1.3 Vp-p
980
µ s
7 Q502-1 Collector
200 mV/DIV, 500 µs/DIV
8 IC601 5 (OSC)
10 mV/DIV, 1 ms/DIV
1.3Vp-p
980
µ
s
21 mVp-p
1.6 ms
• IC Block Diagrams
IC301 TA2072AF
DET 2
AGC IN
RF OUT
BASE
PW VCC
PW GND
PW OUT R
PW OUT C
PW OUT L
PW SW
MUTE SW
BEEP IN
TC
BST SW
ALVS IN
AVLS OUT
BST SW
BASS
BOOST
AMP
PW
R-CH
ADD-R
ADD-L
PW
L-CH
PW C
DOLBY NR
L-CH
DOLBY NR R-CH
L-CH
R-CH
PREAMP
PREAMP
G
G
MIX AMP
EK IN L
ADD OUT BST IN PW IN C BST OUT BST NF EQ R PW NF R
RECT L
HPF L
SC IN L
NR OUT L
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
42
PRE VCC
41
PRE GND 3
40
IN R REV
39
IN R FWD
38
DC SRV R IN L FWD
37
PRE VREF
36 34
DC SRV L
35
IN L REV
3345 44 4348 4647
13
RECT R
11
PRE GND 2
12 14
HPF R
10
15
SC IN R
9
16
NR OUT R
8
RF IN
7
PW VREF
6
PW IN R
5
PRE GND 1
4
PW IN L
3
PW NF L
2
EQ L
1
17
BUF IN L
18
EK IN R
21
PRE SW
22
AMS HPF
23
AMS OUT
24
DET 1
25
F/R SW
26
PRE NF R
27
PRE OUT R
28
MTL DRV R
29
MTL DRV L
30
PRE OUT L
31
PRE NF L
32
NR SW
19
BUF IN R
20
C
C
D
D
B
B
H
H
EK
EK
+ – + –
+
–
+
–
+
–
PW
VREF
SW
AMS
METAL
CONTROL
PRE
VREF
RIPPLE
FILTER
AGC
DET
SW
ALC
BEEP
+ +
IC601 MM1279XVBE
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
+
–