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Extracted text from yamaha as 2000 schematic (Ocr-read)
Page 1
W2001
CB203
CB201
CB202
JK202 JK201
IC201
IC201
A
1
2
3
4
5
6
7
8
9 10BCDE FGH I J K
L
MN
A-S2000
59
All voltages are measured with a 10M-„¦/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.
BALANCE SCHEMATIC DIAGRAMS
12.6
-12.5 0
0
-11.9
-11.9 0
00 0 05.86.4
6.4
0.3
0.30
-24.5 0.61.00.4 1.0 24.625.2
25.7
1.0
-0.8-0.2
-25.4 25.7
5.85.8
5.8
-24.5
-0.8
-25.1
-25.7-25.0
-0.20.4 1.0
24.6
0.3
05.86.4
6.4
0.3
0.300
-24.5 0.50.4 1.0 24.725.2
25.7
1.0
-0.7-0.2
-25.4 25.7
5.85.8
5.8
-24.5
-0.7
-25.1
-25.7
-25.0
-0.2
0.4 1.01.0
24.7
0.3 00 5.86.3
6.3
0.3
0.30
-24.5 0.51.00.4 1.0 24.625.2
25.7
1.0
-0.8-0.3
-25.4 25.7
5.85.8
5.8
-24.5
-0.8
-25.1
-25.7
-25.0
0.4
1.0
24.6
0.3
00 5.86.3
0.3
-25.70
-24.5 0.60.4 1.0 24.725.2
25.7
1.0
-0.8-0.3
-25.4 25.7
5.85.8
5.8
-24.5 -25.0
-0.8
-25.1 0.4
-0.2
1.0 1.0
24.7
0.3
CD BAL L
IC201: NJM2068MD-TE2
Dual operational amplifier OUT
1
OUT
2
-“IN1 +IN1
+IN2 -IN2
-“VCC
+VCC
1
2
3
48
7
6
5
+
-“+
-“
CD BAL L
CD BAL R
to FRONT (12)_CB59Page 66
H2
to FUNCTION (3)_W3Page 62 H8
to FUNCTION (1)_W3005Page 60 K2
to FUNCTION (1)_W3006Page 60 K2
Page 2
CB301
IC301 IC301
IC302
IC302
IC303
IC303
CB305W3004W3002W3001 W3003W3005 W3006
A
1
2
3
4
5
6
7
8
9 10BCDE FGH I J K
L
MN
A-S2000
60 All voltages are measured with a 10M-„¦/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 1/3
12.0
-11.9
-11.9
-11.9
-11.8
-11.9
-11.9
0
0-11.8
0
0-11.80
0 0
0
0
-12.5 0 12.6
0 0
0
0 0
012.6
-12.5
0 0
0
-12.60 0
012.6
0
0
-11.80
0-11.8
0
0-11.80
0-11.825.7
5.8
0.3
0.3
0.1
0.325.60.9
0 1.00.9
0 0.5 1.1 24.625.1
0.9
0.3
06.4 24.6
5.8
24.61.124.6
25.7
-0.90
-25.6
-24.5
-24.51.1
0.625.7-11.9
-11.9
-11.9
-11.9 0
-0.6
-25.6
25.7
0.6 25.7
0.6
0
-25.60.5 0
0.5
-25.6 0.91.1
-0.6 0.2
-0.9
-0.4
0.5
-0.1
6.3
5.8
5.8
-0.9 -25.0
-24.8
-25.6-0.6 0
0 0.3
0.3
0.3 5.8 5.8
25.7
5.8
0.3
0.3
0.1
0.324.60.9
0 1.30.9
0 0.5 1.1 24.625.1
0.9
0.3
06.4 24.6
5.8
25.71.125.2 24.6
25.7
-0.90.3
-25.6
-24.5
-24.51.1
0.525.7
0
-0.6
-25.6 0.91.1
0
-0.6 0.3
-0.9
-0.3
0.5
0.5
6.3 5.8
5.8
-0.9
-25.1 -24.8
-25.5-0.6 0
0.1 0.3
0.3
0.3 5.8
5.8
-11.9
CD L
IN L
CD BAL L
FUNCTION (1)
LINE 2
IC301: NJM2068MD-TE2
Dual operational amplifier OUT
1
OUT
2
-“IN1 +IN1
+IN2 -IN2
-“VCC
+VCC
1
2
3
48
7
6
5
+
-“+
-“
IC302, 303: 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
to BALANCE_CB201Page 59
I5
to FUNCTION (2)_CB403Page 61 J4
to FUNCTION (2)_CB402Page 61 B6
to FUNCTION (2)_CB401Page 61 B5
to FRONT (1)_CB519Page 64 B5
to FRONT (10)_W1003Page 65 B5 to BALANCE_CB202Page 59 I7
to FRONT (10)_W1002Page 65
M5
