Yamaha AS2000BL Stereo Amplifier User Manual


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CB406
CB403
CB404
W4004
CB405
CB402
IC407
IC412
IC411
IC410
IC404
IC404
IC408IC409
CB401
IC405
IC405
IC406
IC406
IC413
IC413
IC401
IC401
IC402
IC402
IC403
IC403
A
1
2
3
4
5
6
7
8
9
10
BCDEFGH I JK
L MN
A-S2000
61
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
FUNCTION 2/3
0
12.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-12.4
0
0
-12.4
0
0
-12.4
12.5
-12.3
12.5
24.5
-11.8
0
0.3
-0.1
-25.3
0.7
0.7
-0.2
-25.8
-0.7
-24.6
-25.3
-25.7
0.4
0.3
5.8
5.8
0
0
0
-11.8
24.2
-25.2
12.6
0
0
0
0
5.8
5.8
0
25.3
24.4
-24.5
0.5
-0.1
-25.0
-25.7
12.6
0
0
12.6
-12.5
-12.5
12.5
25.5
0.5
0.5
0
0
-25.8
-25.8
0.5
25.5
12.6
0.5
-0.5
0
0
-12.5
-12.5
-11.9
-11.9
0
0.6
-12.5
0.5
-12.5
-12.5
0
0.7
25.0
25.5
-0.2
-25.7
-0.7
1.0
0.4
1.0
6.4
5.8
0
0.3
0
0.3
0
6.4
25.5
24.5
24.9
25.5
1.0
0.4
1.0
5.8
5.8
12.5
0
-12.4
0
12.5
0
-11.9
-11.9
0
0
0
-12.4
0
-12.4
0
0
-12.5
0
0
-12.5
12.6
12.6
0
0
-12.5
12.6
12.6
-12.4
0
-12.4
0
0
-12.4
0
0
0
-11.9
-11.9
0
0
0
12.5
12.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
12.5
12.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-12.4
12.5
12.5
12.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0
0
0
0
-12.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-12.4
12.5
12.5
12.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0
0
0
0
-12.5
0
0
0.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
-12.5
12.5
12.5
12.5
0
0
0
0
0
0
0
0
0
0
0
0.1
0
0
0.1
0
0
0
0
0
0
0
0
0.1
0
0
0
0
-12.5
12.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-12.5
12.6
12.5
12.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
12.5
0
0
0
0.1
0
0
0
0
-12.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-12.5
12.6
12.5
12.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
12.5
0
12.6
0
0
0.1
0
0
0
0
-12.5
-11.9
-11.9
0
0
0
5.8
5.8
6.4
25.4
24.4
24.9
1.1
1.1
25.4
0.4
5.8
5.8
24.4
0.3
0.3
0.5
-0.7
-0.4
-0.7
-0.1
-25.8
-24.7
-24.7
-25.8
0
-11.8
0
0
-11.8
25.4
24.9
25.4
1.0
0.4
24.4
1.0
6.3
5.8
5.8
0
0
24.3
-0.4
-0.2
-0.7
-24.7
-24.7
-25.3
-25.8
5.8
0.3
5.8
-0.7
0
-25.8
-0.7
0.3
OUT L
IN L
IC413: NJM2068MD-TE2
Dual operational amplifier
OUT1
OUT2
–IN1
+IN1
+IN2
-IN2
–VCC
+VCC
1
2
3
4
8
7
6
5
+
–
+
–
IC401-406: OP275GSR
Dual bipolar/JFET, audio operational amplifier
OUT A
-IN A
V-
V+
OUT B
1
2
3
4
5
+IN A -IN B
+IN B
6
7
8
IC407-412: TC94A81UG
Electronic volume control
Zero crossing
detection
circuit
Decoder
24-bit shift register
39
38
37
36
35
34
33
1
32 31 30 29 28
L-SW-IN4
L-SW-OUT
L-ZX-IN
L-ZX-AGND
L-MVR-IN
L-MVR-AGND1
L-MVR-AGND2
R-MVR-AGND2
L-MVR-OUT
R-MVR-OUT
L-TVR-OUT
R-TVR-OUT
L-TVR-IN
R-TVR-IN
L-TVR-REF
R-TVR-REF
NC
40
L-SW-IN3
41
L-SW-IN2
42
43
45
L-SW-IN1
TEST
VDD
SS1
R-SW-IN4
R-SW-OUT
R-ZX-IN
R-ZX-AGND
R-MVR-IN
R-MVR-AGND1
R-SW-IN3
R-SW-IN2
R-SW-IN1
NC
VSS
Latch
Latch LatchLatch
Latch
Latch
Zero crossing
detection
circuit
Latch Latch
Latch
Decoder
27 26 25 24 23
Latch
22
21
20
19
18
17
16
15
14
13
12
2
SS2
3
CS1
4
CS2
5
MUTEM
6
GND
8
MUTE
9
CK
10
DATA
11
STB
7
TC
Timing
gene
Test and
Power ON reset
Level shift
FUNCTION (2)
to FUNCTION (1)_W3003
Page 60
K3
to FRONT (11)_W6
Page 66
F4
to FRONT (1)_CB517
Page 64
K6
to MAIN (1)_W102
Page 63 A3
to MAIN (2)_W202
Page 63
A8
to FUNCTION (1)_W3001
Page 60
K4
to FUNCTION (1)_W3002
Page 60
K6
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