Yamaha AD8HR Service Manual page 19

IC BLOCK DIAGRAM
TC74VHC00FT
Quad 2 Input NAND
MAIN: IC53
1A
1B
1Y
2A
2B
2Y
Vss
HD74LV32AFPEL
Quad 2 Input OR
MAIN: IC12
1A
1B
1Y
2A
2B
2Y
GND
SN75124NSR
Triple Line Receiver
MAIN: IC925
GND
Downloaded from www.Manualslib.com
(X2313A00)
VDD
1 14
4B
2 13
4A
3 12
4Y
4 11
3B
5 10
3A
6 9
3Y
7 8
(IS003200)
Vcc
1 14
4B
2 13
4A
3 12
4Y
4 11
3B
5 10
3A
6 9
3Y
7 8
(XV930A00)
1A Vcc
1 16
1B 1S
2 15
2R 1R
3 14
2S 1Y
4 13
2A 3A
5 12
2B 3S
6 11
2Y 3R
7 10
8 9 3Y
manuals search engine
（IC ブロック図）
(XY102A00)
HD74LVU04AFPEL
Hex Inverter
MAIN: IC7
1
1A 14
2 13
1Y
3 12
2A
2Y 4 11
5
10
3A
6
9
3Y
Vss 7 8
(IS007400)
HD74LV74AFPEL
Dual D-Type Flip-Flop
MAIN: IC6
1
1CLR 14
2 13
1D D
D
3
12
1CK CK
4
1PR 11
PR CK
5 Q
1Q 10
PR
6
9
Q
1Q Q
7
GND 8
Q
INPUTS OUTPUTS
PR CLR CLK D Q
L H X X H
H L X X L
L L X X H
H H f H H
H H f L L
H H L X Q
O
(IS013810)
SN74LV138ANSR
3 to 8 Demultiplexer
MAIN: IC962
A 1 16
A
Select
2 B
B Y0 15
3 14
C Y1
C
4 13
G2A G2A Y2
Enable
5
G2B Y3 12
G2B
6 11
G1 Y4
G1
Output
7 10
Y7 Y7 Y5
Y6
8
GND 9
TC74VHC08FT
Quad 2 Input AND
MAIN: IC61,901
1A
1
VDD
1B
2
6A
1Y
3
6Y
2A
4
5A
2B
5
5Y
2Y
6
4A
VSS
7
4Y
SN75121NSR
Dual Line Driver
MAIN: IC926
VCC
2CLR
1A 1
2D
1B 2
2CK
1C 3
2PR
1D 4
2Q
5
1E
2Q
1F 6
1Y 7
GND 8
Q
L
H
H
L
H
Q
O
SN74LV139ANSR
Dual 2 to 4 Demultiplexer
MAIN: IC16
Vcc 1G 1
2
YO 1A
3
Y1 1B
4
Y2 1Y0
Output
5
Y3 1Y1
6
Y4 1Y2
7
Y5 1Y3
8
Y6 GND
AD8HR
(XV891A00)
VDD
14
4B
13
4A
12
4Y
11
3B
10
3A
9
3Y
8
(XU816A00)
16 Vcc
15 2F
14 2E
13 2D
12
2C
11 2B
10 2A
9 2Y
(IS013910)
16 Vcc
G
G
15 2G
A
A
14
2A
B
B
13
2B
Y0
Y0
12
2Y0
Y1
Y1
11
2Y1
Y2
Y2
10
2Y2
Y3
Y3
9 2Y3
19