Yamaha AW2400, Service Manual

Page: 36 / 172

AW2400
36
IC BLOCK DIAGRAM
（
IC
ブロック図）
SN74LV541APWRBUS (X5966A00)
MAIN: IC114
Octal 3-State Buffer
SN74LV08APWR (X4463A00)
MAIN: IC118
Quad 2 Input AND
SN74LV11APWR (X3516A00)
MAIN: IC015
Triple 3 Input AND
SN74LV04APWR (X5965A00)
MAIN: IC311, 401-403
SN74HCU04NSR
(XW842A00)
DIO: IC004
Hex Inverter
SN74LV244APWR (X3292A00)
DIO: IC001
Octal 3-State Bus Buffer
SN74LVC245APWR (XZ287A00)
MAIN: IC006, 007, 009-011
SN74AHCT245PWR (X2709A00)
MAIN: IC103, 104, 110, 112, 301
AD: IC001, 002
SN74LV245APWR (X3693A00)
MAIN: IC107, 108, 111, 113
74VHC245SJX (XY874A00)
FD: IC001-003
SN74AHC245NSR (X2717A00)
FD: IC001-003
Octal 3-State Bus Transceiver
SN74LV74APWR (X5534A00)
MAIN: IC210, 314
Dual D-Type Flip-Flop
SN74LV4051ANSR (X3955A00)
FD: IC007, 008
Single 8-Channel
Multiplexer/Demultiplexer
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
1A
2A
4
2B
5
2C
6
2Y
7
VSS
1B
14
13
12
VDD
1Y
11
3C
10
3B
9
3A
8
3Y
1C
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
2
3
1A
1Y
4
2A
5
2B
6
2Y
7
VSS
1B
14
13
12
VDD
4A
11
4Y
10
3B
9
3A
8
3Y
4B
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
1G
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
VDD (Vcc)
2G
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1 (GND) Vss
1
2
3
4
5
6
7
20
19
18
17
16
15
14
Vcc
G2
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
8
9
10
12
11
GND
A8
A7
A6
A5
A4
A3
A2
A1
G1
13
1
Channel IN/OUT 4
2
3
4
5
6
7
8
- do. - 6
Control Inhibit
-DC Voltage Supply
- do -
V
DD
CH2
CH1
CH0
CH3
A
B
C 9
10
11
12
13
14
15
16
+DC Voltage Supply
Channel IN/OUT 2
- do. - 1
- do - 3
Control Input A
- do. - B
- do. - C
CH4
CH6
COM
CH7
CH5
INH
VEE
V
SS
Commons OUT/IN
Channel IN/OUT 7
- do. - 5
- do - 0