Yamaha SP2060 Service Manual - Ic Block Diagram
SP2060
23
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IC BLOCK DIAGRAM
（IC ブロック図）
• 74VHC245MTCX_NF40 (X0296A00)
Bus Tranciever
CPU:
IC003
• NJM2068M-D (TE2) (X3505A00)
Operational Amplifier
ANA:
IC401, 402
• NJM2904V (TE1) (XR532A00)
Operational Amplifier
CPU:
IC010
• NJM4556AL (XP844A00)
Operational Amplifier
ANA:
IC105, 106, 205, 206, 305, 306
• SN74AHC1G04DCKR (X4137A00)
Inverter
CPU:
IC008
ENT:
IC110
• SN74AHC1G08DCKR AN (X3833A00)
Quad 2 Input AND
CPU:
IC015
ENT:
IC114
• SN74AHC1G32DCKR (X4642A00)
Single 2 Input Positive OR Gate
ENT:
IC111
1
D1R
2
3
4
5
6
7
8
9
10
A1
A2
A3
A4
A5
A6
A7
A8
GND
11
12
13
14
15
16
17
18
19
20
V
CC
G
B1
B2
B3
B4
B5
B6
B7
B8
1
2
3
4
-V
8
7
6
5
Output A
+V
Non-Inverting
Input A
-DC Voltage Supply
+DC Voltage
Supply
Output B
Inverting
Input B
Non-Inverting
Input B
Inverting
Input A
+
-
+
-
1
2
3
4
- V
8
7
6
5
Output A
+V
Non-Inverting
Input A
Ground
+DC Voltage
Supply
Output B
Inverting
Input B
Non-Inverting
Input B
Inverting
Input A
+
-
+
-
1
2
3
5
4
NC
GND
V
CC
OUT Y
IN A
1
2
3
A
B
GND
5
4
Vcc
Y
INPUTS
FUNCTION TABLE
OUTPUT
A
B
Y
H
L
L
H
X
L
H
L
X
• SN74AHCT08PWR (X3824A00)
Quad 2 Input AND
DSP:
IC261
• SN74AHCT245PWR (X2709A00)
Bus Tranceiver
DSP:
IC016, 059, 250, 253, 258
1
2
3
1A
1B
1Y
2A
2B
4
2Y
5
VSS
VDD
4B
4A
4Y
3B
3A
3Y
6
7
14
13
12
11
10
9
8
1
2
3
4
5
6
7
20
19
18
17
16
15
14
Vcc
G
B1
B2
B3
B4
B5
B6
B7
B8
8
9
10
12
11
GND
A8
A7
A6
A5
A4
A3
A2
A1
D1R
13
Y
4
B
2
GND
3
Vcc
5
A
1