Yamaha A-S2000 Service Manual - Page 61

/3, IC413, IC401-406 - test audio

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A B C D E F G H I J K L M N FUNCTION 2/3 1 A-S2000 12.5 12.5 0 0 0 0 0 0 0 0 0 2 3 4 IN L 5 CB401 Page 60 K6 to FUNCTION (1)_W3002 CB402 Page 60 K4 6 to FUNCTION (1)_W3001 7 8 9 10 -12.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 IC410 0 0 0 0 0 0 0 0 0 0 12.5 0 IC404 0 0 -12.4 0 IC404 0 0 12.5 0 0 0 0 0 0 0 0 0 12.5 12.5 0 0 0 0 0 0 0 0 0 12.5 0 0 0 0 0 0.1 0 0 0 0 IC411 0 12.5 0 0 0 IC405 0 0 0 0 -12.4 0 0 0 0 0 0 IC405 0 0 -12.5 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 0.1 0 0 0 0 IC412 0 0 12.5 0 0 IC406 0 0 -12.4 0 0 0 0 0 0 0 0 IC406 0 0 -12.5 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 0.1 0 0 0 0 IC407 0 0 12.5 0 0 IC401 0.1 0.1 0 -12.5 0 0 0.1 0 0 0.1 0 IC401 0 0 -12.5 0 0 0 0 0 0 0 0 0 12.5 12.5 0 0 0 0 0 0 0 0 0 12.5 0 12.5 0 0 0 0.1 0 0 0 0 IC408 0 0 12.6 0 0 IC402 0 0 -12.5 0 0 0 0 0 0 0 IC402 0 0 0 -12.5 0 0 0 0 0 0 0 0 0 12.5 12.5 0 0 0 0 0 0 0 0 0 0 12.5 0 12.6 0 0 0.1 0 0 0 0 IC409 0 0 12.6 0 0 IC403 0 0 -12.5 0 0 0 0 0 0 0 0 IC403 0 0 0 -12.4 0 0 -12.4 0 12.5 12.5 -12.3 12.5 0 0 12.5 0 0 0 -12.4 0 -11.9 -11.9 0 -12.4 0 0 0 24.9 24.5 25.5 6.4 5.8 5.8 5.8 5.8 24.5 1.0 0.4 -0.1 25.5 1.0 0.4 0 0.3 0 -11.8 0 0 0.3 0.7 0.7 -25.3 -24.6 -0.2 -0.7 -25.8 -25.3 -25.7 0 -11.8 0 24.2 25.3 6.4 5.8 5.8 5.8 25.0 24.4 1.0 0.5 -0.1 25.5 1.0 0.4 0 0.3 0 0.3 0.7 -24.5 -25.0 -25.7 -25.2 -0.2 -0.7 -25.7 12.6 12.6 12.6 0 0 IC413 0 0 0 IC413 0 -12.5 -12.5 -12.5 OUT L -11.9 -11.9 12.5 0.6 0 0 -12.5 0.5 -12.5 25.5 25.5 0.5 0.5 0 0 0.5 -25.8 -25.8 CB406 Page 63 A8 to MAIN (2)_W202 CB403 Page 60 K3 to FUNCTION (1)_W3003 CB404 Page 66 F4 to FRONT (11)_W6 0 -12.4 0 0 -12.5 0 12.6 12.6 -12.5 0 0 -11.9 -11.9 -12.5 0 0 12.6 12.6 -12.4 0 0 -12.4 0 -12.4 0 24.4 25.4 6.4 5.8 5.8 0 0.3 0 -11.8 0 5.8 5.8 0 0.3 24.9 24.4 1.1 25.4 1.1 0.4 0.5 -0.4 -0.7 -0.7 -24.7 -24.7 -0.1 -25.8 -25.8 0 -11.8 0 24.3 25.4 6.3 5.8 5.8 5.8 0 0.3 5.8 0 0.3 24.9 24.4 1.0 -0.4 -0.2 25.4 1.0 0.4 -24.7 -0.7 0 -0.7 -0.7 -25.8 -24.7 -25.3 -25.8 12.6 0.5 0 0 -0.5 -12.5 -12.5 -11.9 -11.9 W4004 Page 64 K6 to FRONT (1)_CB517 CB405 Page 63 A3 to MAIN (1)_W102 FUNCTION (2) IC401-406: OP275GSR Dual bipolar/JFET, audio operational amplifier OUT A 1 -IN A 2 +IN A 3 V- 4 8 V+ 7 OUT B 6 -IN B 5 +IN B IC413: NJM2068MD-TE2 Dual operational amplifier OUT1 1 -IN1 2 +IN1 3 -VCC 4 +- +- 8 +VCC 7 OUT2 6 -IN2 5 +IN2 IC407-412: TC94A81UG Electronic volume control L-MVR-AGND2 L-MVR-OUT L-TVR-OUT L-TVR-IN L-TVR-REF NC R-TVR-REF R-TVR-IN R-TVR-OUT R-MVR-OUT R-MVR-AGND2 33 32 31 30 29 28 27 26 25 24 23 Latch Latch L-MVR-AGND1 34 L-MVR-IN 35 L-ZX-AGND 36 L-ZX-IN 37 L-SW-OUT 38 L-SW-IN4 39 L-SW-IN3 40 L-SW-IN2 41 L-SW-IN1 42 TEST 43 VDD 45 Zero crossing detection Latch Latch circuit Latch LLaattcchh Decoder Decoder 24-bit shift register Timing gene Test and Power ON reset Level shift Latch Zero crossing detection Latch circuit 22 R-MVR-AGND1 21 R-MVR-IN 20 R-ZX-AGND 19 R-ZX-IN 18 R-SW-OUT 17 R-SW-IN4 16 R-SW-IN3 15 R-SW-IN2 14 R-SW-IN1 13 NC 12 VSS 1 2 3 4 5 6 7 8 9 10 11 SS1 SS2 CS1 CS2 MUTEM GND TC MUTE CK DATA STB # 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. 61

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CB406
CB403
CB404
W4004
CB405
CB402
IC407
IC412
IC411
IC410
IC404
IC404
IC408
IC409
CB401
IC405
IC405
IC406
IC406
IC413
IC413
IC401
IC401
IC402
IC402
IC403
IC403
A
1
2
3
4
5
6
7
8
9
10
B
C
D
E
F
G
H
I
J
K
L
M
N
A-S2000
61
★
All voltages are measured with a 10M
Ω
/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
OUT
1
OUT
2
–
IN
1
+IN
1
+IN
2
-IN
2
–
V
CC
+V
CC
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
Latch
Latch
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