Yamaha NHB32-C, Service Manual

Page: 18 / 73

NHB32-C
18
AES: IC215, IC223, IC224, IC609, IC616, IC617
D-FF
TC74VHC74FT (XV892A00)
AES: IC212-219, IC610-613
MAIN: IC212
D-FF
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
Vcc
2F
2E
2A
2Y GND
1Y
1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
2C
2B
2D
1A
1B
1C
1D
1E
1F
SN75121NSR
MAIN: IC312
LINE DRIVER
(XU816A00)
1A
1B
2R
2S
2A
2B
2Y
GND
1 16
2 15
3 14
4 13
5 12
6 11
7 10
8 9
Vcc
1S
1R
1Y
3A
3S
3R
3Y
SN75124NSR
MAIN: IC311
LINE DRIVER
(XV930A00)
TC74HC251AF
AES: IC225, IC226
MAIN: IC501
LINE DRIVER
(XQ968A00)
1
2
3
4
5
6
7
3
2
1
Y
W
STROBE
GND
0
16
15
14
13
12
11
Vcc
4
5
6
7
A
B
8 9
10
C
DATA
INPUTS
DATA
SELECT
DATE
INPUTS
OUTPUTS
D4
D5
B
C
S
D7
A
D6
D2 D3
D1
D0
Y
W
TC74VHC04FT (X0195A00)
AES: IC222, IC319, IC320, IC415, IC416, IC716,
IC717, IC815, IC816
INVERTER
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
M51953AFP (XW422A00)
AES: IC315-318, IC417-420, IC718-721, IC817-820
RESET
TC7SH04FU (XS775A00)
MAIN: IC211,IC315
INVERTER
NC
IN A
GND
V
CC
OUT Y
1
2
3
5
4
1
2 N.C.
3 N.C.
4
8
7
6
5
Output
Outside delay capacity
N.C.
GND
N.C.
Power supply
GND Outside delay capacity
7
4 5
Power supply
5 A 5 A
6 Output
+
R1
R2
1.25V
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