Yamaha AD8HR Service Manual page 20

AD8HR
HD74LV157AFPEL
Quad 2 to 1 Multiplexer
MAIN: IC923,930
1
SELECT
2 1A G
1A
3
1B 4A
1B
4
1Y 1Y 4B
5
2A 4Y
2A
6
2B 3A
2B
7 2Y 3B
2Y
8
GND
74LVX4245MTCX
Dual Supply Octal Bus Transceiver
MAIN: IC17,18
VCCA
1
0
2
DIR 1 A
A1
3
2 B
A2
4
3 D
A3
5
4 D
A4
6
5 G2
A5
7
6 G1
A6 8 7 15
A7 9
8 14
A8 10 9 13
GND 11
10 12
11
GND 12
(XU815A00)
DS26C32ATMX
Quad Differential Line Receiver
SUB: IC905
1
INPUT A
-
+
INPUT A
2
OUTPUT A 3
ENABLE 4
OUTPUT C 5
INPUT C 6
+
-
INPUT C
7
GND 8
20
(IS015700)
TC74VHC244FT
Octal 3-State Bus Buffer
MAIN: IC3
16 Vcc
15
STROBE
14
4A
13 4B
12
4Y
11
3A
10
3B
9 3Y
(GND) Vss
(X3097A00)
HD74LV273AFPEL
Octal D-Type Flir Flop
MAIN: IC963-968,970,971
24 VCCB
VCCB
23
CLEAR
22 /G
1Q
B1
21 1D
2D
20 B2
2Q
19
B3
3Q
18
B4
3D
B5
17
4D
16
B6
4Q
15
B7
GND
14
B8
13
GND
TC74HC4053AF (EL)
Triple 2-Channel
Multiplexer/Demultiplexer
MAIN: IC102,202,302,402,502,602,702,802
Switches IN/OUT
16 Vcc
Switches IN/OUT
15 INPUT B
Switches IN/OUT
14 INPUT B
Commons OUT/IN
13 OUTPUT B
Swiches IN/OUT
12
ENABLE
Control Inhibit
11
OUTPUT D
10
INPUT D
INPUT D
9
(XW234A00)
1G VDD (Vcc)
1 20
1A1 2G
2 19
2Y4 1Y1
3 18
1A2 4 17 2A4
2Y3 1Y2
5 16
1A3 6 15 2A3
2Y2 7 14 1Y3
1A4 2A2
8 13
2Y1 1Y4
9 12
10 11 2A1
(IS027300)
1 20
VCC
2 19
8Q
Q Q
CL CL
3 18
D CK CK D
8D
4 17
7D
D CK CK D
CL CL
5 16
Q Q
7Q
6 15
6Q
Q Q
CL CL
7 14
D CK CK D 6D
8 13
5D
D CK CK D
CL CL
9 12
Q Q 5Q
10 11
CLOCK
(XY879A00)
V
1 16 CC
Y1
Commons OUT/IN
2 15
Y0 Y
Y0 Y
Commons OUT/IN
3 14
Z1 X
Z1 X
Swiches IN/OUT
4 13
Z X1
Z X1
Swiches IN/OUT
5 12
Z0 X0
Z0 X0
Control Input
6 11
INH A
A
Control Input
V
EE 7 10
B
B
Control Input
V
SS 8 9
C
(XU797A00)
TC74VHC245FT
(XT744A00)
TC74VHCT245AFT
Octal 3-State Bus Transceiver
MAIN: IC1,8,9,14,15,51,56,57,927,928
SUB: IC901,902
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
GND 10 11
(XU073A00)
SN75C1168NSR
Line Driver / Receiver
SUB: IC904
COMB: IC951
1
1B 16 Vcc
2 15
1A 1D
3
14
1R 1Y
4
1DE 13 1Z
5
12
2R 2DE
6
11
2A 2Z
7 10
2B 2Y
8
GND 9 2D
(XR532A00)
NJM2904V (TE)
(X3505A00)
NJM2068MD-TE2
Dual Operational Amplifier
HIC-HA: IC101,102
MAIN: IC5,103,104,203,204,303,304,403,404,
503,504,603,604,703,704,803,804
+DC Voltage
Output A
1 +V 8
Supply
Inverting
Output B
2 7
Input A - +
Non-Inverting Inverting
3 6
+ -
Input A Input B
Non-Inverting
Ground
4 -V 5
Input B
V
CC
G
B1
B2
B3
B4
B5
B6
B7
B8