Yamaha ACU16-C, Service Manual

Page: 18 / 69

ACU16-C
18
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
TC74VHCT245AFT(XT744A00)
MAIN: IC407, IC410
BUFFER
DS36276M (X2155A00)
MAIN: IC307
HD74LV273ATELL (X2689A00)
MAIN: IC207, IC214, IC218, IC417
D-FF
SN75C1168NSR (XU073A00)
MAIN: IC302
LINE DRIVER
TC74VHC74FT (XV892A00)
MAIN: IC212
D-FF
INPUTS OUTPUTS
PR CLR CLK D Q Q
L
H
H
L
H
Q
O
H
L
H
H
L
Q
O
X
X
X
H
L
X
X
X
X
f
f
L
H
L
L
H
H
H
L
H
L
H
H
H
1
2
3
4
5
6
7
1CLR
1D
1CK
1PR
1Q
1Q
GND
14
13
12
11
10
9
8
VCC
2CLR
CLR 2D
D
2CK CK
2PR PR
2Q
2Q Q
Q
CLR D
CK
PR
Q
Q
TC74VHC245FT(XU797A00)
DAC: IC201, IC202, IC401, IC402
MAIN: IC219, IC503, 602, 603
74VHC245MTCX (X0296A00)
MAIN: IC219, IC503
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
+ -
+ -
DAC: IC205, IC206, IC306, IC307, IC405,
IC406, IC506, IC507
OP AMP
µ
PC4570G2 (XF291A00)
DAC: IC207-210, IC308-311, IC407-410,
IC508-511
NJM4580ED (XT157A00)
TC74VHC04FT (X0195A00)
MAIN: IC509
INVERTER
1
2
3
4
5
6
7
1A
1Y
2A
2Y
3A
3Y
Vss
14
13
12
11
10
9
8
VDD
6A
6Y
5A
5Y
4A
4Y
1 CLEAR
2
3
4
5
6
7
8
9
10
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND 11
12
13
14
15
16
17
18
19
20 V
CC
8Q
8D
7D
7Q
6Q
6D
5D
5Q
CLOCK
Q Q
D D CK CK
CL CL
Q Q
D
D CK CK
CL
CL
Q Q
D
D
CK
CK
CL CL
Q Q
D
D
CK
CK
CL CL
1
2
3
4
R
8
7
6
5
RO
DE
DI
V
CC
DO/RI
DO/RI
GND
RE
D
1
2
3
4
5
6
7
1B
1A
1R
1DE
2R
2A
2B
16
15
14
13
12
11
10
Vcc
1D
1Y
1Z
2DE
2Z
2Y
8
GND
9
2D
TC74VHC125FT (XY074A00)
MAIN: IC412, IC505, IC506
BUFFER
1
2
3
4
5
6
7
C1
A1
Y1
C2
A2
Y2
GND
14
13
12
11
10
9
8
Vcc
C4
A4
Y4
C3
A3
Y3