Ic Block Diagram （Icブロック図 - Yamaha NHB32-C Service Manual

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IC BLOCK DIAGRAM
TC74VHC244FT (XW234A00)
MAIN: IC308, IC402, IC408, IC409
BUS BUFFER
1G 1
1A1 2
3
2Y4
4
1A2
5
2Y3
6
1A3
2Y2 7
1A4 8
2Y1 9
(GND) Vss 10
AM26LS31CNSR
AES: IC302, IC402, IC702, IC802
TRANSMITTER
1A 1
1Y 2
1Z 3
TE
L 13942296513
ENABLE G 4
2Z 5
2Y
6
2A
7
GND 8
INPUT ENABLES
A G
H H
L H
H X
L X
X L
H= high level
L= low level
HD74LV273ATELL (X2689A00)
MAIN: IC207, IC214, IC215, IC218
D-FF
CLEAR 1
1Q 2
Q
CL
D CK
1D 3
2D 4
D CK
CL
Q
2Q 5
3Q 6
Q
CL
CK
D
3D 7
4D 8
D CK
www
CL
Q
4Q 9
GND 10
.
http://www.xiaoyu163.com
（IC ブロック図）
TC74VHC125FT (XY074A00)
MAIN: IC314, IC412
BUFFER
20 V (Vcc)
DD
19
2G
18
1Y1
17
2A4
16
1Y2
15
2A3
14 1Y3
13 2A2
12 1Y4
11 2A1
(XU996A00) DS26C32ATMX (XU815A00)
AES: IC301, IC401, IC701, IC801
RECEIVER
16 Vcc
15
4A
INPUT A
14 4Y
INPUT A
13 4Z
OUTPUT A
12
ENABLE G
ENABLE
11
3Z
OUTPUT C
10 3Y
INPUT C
3A
9
INPUT C
OUTPUTS
G Y Z
X H L
X L H
L H L
L L H
H Z Z
X= irrelevant
Z= high impedance (off)
HD74LV574AFPEL (IS057400)
MAIN: IC417
D-FF
V
20
CC
19 8Q
Q
CL
CK D
18 8D
17 7D
CK
D
CL
Q
7Q
16
15 6Q
Q
CL
CK D
14 6D
5D
13
CK D
CL
Q
12 5Q
x ao
11 CLOCK
y
i
http://www.xiaoyu163.com
8
C1 1 14
Vcc
2
A1 13
C4
Y1 3
12 A4
C2 4
11 Y4
A2 5
10 C3
6
Y2 9
A3
GND 7 8
Y3
1
16 Vcc
-
Q Q
+
2 15
3 6 7 INPUT B 1 3
3 14 INPUT B
4 13 OUTPUT B
5
12
ENABLE
6 11
OUTPUT D
+
-
7
10 INPUT D
GND 8 INPUT D
9
Output
1 20 Vcc
Control
D Q
2 19
D0 Q0
CK OE
D Q
3 18
D1 Q1
CK OE
D Q
4 17
D2 Q2
CK
OE
D Q
5 16 Q3
D3
CK OE
D Q
D4 6 15 Q4
CK OE
7 D Q 14
D5 Q5
CK OE
Q
8 D 13
D6 Q6
CK OE
D Q
9 12
D7 Q7
CK OE
u163
Clock
GND 10 11
.
2 9 9 4 2 8
TC74HC245F(XT487A00)
MAIN: IC418
TC74VHC245FT(XU797A00)
AES: IC203-214, IC220, IC310, IC501, IC601-606,
IC608, IC614, IC710
MAIN: IC219, IC309, IC310, IC503, IC604-608
TC74VHC245MTCX (X0296A00)
AES: IC203-214, IC220, IC310, IC501, IC601-608,
IC614, IC710
MAIN: IC219, IC309, IC310, IC503, IC604-608
TC74VHC245AFT(XT744A00)
MAIN: IC407, IC410
BUFFER
D1R 1 20
A1 2 19
A2 3 18
A3 4 17
A4 5
16
A5 6 15
1 5 0 5 8 2 9 9 4
A6 7 14
A7 8
13
A8 9 12
GND 10 11
SN75C1168NSR (XU073A00)
AES: IC502, 901
DRIVER/RECEIVER
1
16
1B
2 15
1A
3 14
1R
4 13
1DE
5 12
2R
6
11
2A
7
10
2B
m
8 9
GND
co
NHB32-C
9 9
V
CC
G
B1
B2
B3
B4
2 8 9 9
B5
B6
B7
B8
Vcc
1D
1Y
1Z
2DE
2Z
2Y
2D
17