Sony WM-EX570, Руководство по обслуживанию

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• 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
33 45 44 43 48 46 47
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
+
–