Yamaha ACU16-C Service Manual page 18

ACU16-C
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3 7 63 1515 0
TC74VHC245FT(XU797A00)
DAC: IC201, IC202, IC401, IC402
MAIN: IC219, IC503, 602, 603
74VHC245MTCX (X0296A00)
MAIN: IC219, IC503
TC74VHCT245AFT(XT744A00)
MAIN: IC407, IC410
BUFFER
D1R 1
20
A1 2 19
A2 3 18
A3 4
17
A4 5 16
A5 6 15
A6 7 14
A7 8 13
A8 9 12
TE
L 13942296513 GND 10 11
SN75C1168NSR (XU073A00)
MAIN: IC302
LINE DRIVER
1
16
1B
2 15
1A
3 14
1R
4 13
1DE
5 12
2R
6
11
2A
7
10
2B
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8 9
GND
.
18
http://www.xiaoyu163.com
DS36276M (X2155A00)
MAIN: IC307
RO 1
RE 2
DE 3
DI 4
V
CC
G
B1
B2
TC74VHC74FT (XV892A00)
B3
MAIN: IC212
B4
D-FF
B5
B6
1
1CLR
B7
2
1D
B8
3
1CK
4
1PR
5
1Q
6
1Q
7
GND
INPUTS
PR CLR
L H
H L
L L
H H
H H
H H
TC74VHC04FT (X0195A00)
MAIN: IC509
INVERTER
Vcc
1A 1
1D
2
1Y
1Y
3
1Z 2A
4
2Y
2DE
5
3A
2Z
6
2Y
3Y
7
Vss
2D
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http://www.xiaoyu163.com
8
HD74LV273ATELL (X2689A00)
MAIN: IC207, IC214, IC218, IC417
D-FF
8 V
CC
R
7 DO/RI
6 DO/RI
D
5 GND
NJM4580ED (XT157A00)
DAC: IC207-210, IC308-311, IC407-410,
µPC4570G2 (XF291A00)
14
VCC
DAC: IC205, IC206, IC306, IC307, IC405,
13
D
2CLR
Q Q
OP AMP
3 6 7 1 3
D
12
CK
2D
11
PR
CK 2CK
Q 10
PR 2PR
Q 9
Q
2Q
8
Q 2Q
OUTPUTS
-DC Voltage Supply
CLK D Q Q
X X H L
X X L H
X X H H
f H H L
f L L H
L X Q Q
O O
TC74VHC125FT (XY074A00)
MAIN: IC412, IC505, IC506
BUFFER
14
VDD
13
6A
12
6Y
11
5A
10
5Y
9
4A
8
4Y
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.
2 9 9 4 2 8
CLEAR 1 20 V
CC
1Q 2 19 8Q
Q Q
CL CL
D CK CK D
1D 3 18 8D
2D 4 17 7D
D CK CK D
CL CL
Q Q
2Q 5 16 7Q
3Q 6 6Q
15
Q Q
CL CL
D CK
CK D
3D 7 14 6D
4D 8 13 5D
CK D
D CK
CL CL
Q
Q
4Q 9 5Q
12
GND 10 11 CLOCK
IC508-511
IC406, IC506, IC507
1 5 0 5 8 2 9 9 4
+DC Voltage
Output A 1 +V 8
Supply
Inverting
2 7 Output B
Input A
- +
Non-Inverting Inverting
3 6
+ -
Input A Input B
Non-Inverting
4 -V 5
Input B
C1 1
14 Vcc
2
A1 13
C4
3
Y1 12 A4
4
C2 11 Y4
5
A2 10 C3
6 9
Y2 A3
m
7
GND 8 Y3
co
9 9
2 8 9 9