Yamaha NHB32-C, Service Manual

Page: 19 / 73

NHB32-C
19
TC74VHC08FT
AES: IC201, IC321, IC414, IC715, IC814
AND
(XV891A00) TC7WH04FU
MAIN: IC413, IC419
INVERTER
(XY363A00) TC7WH14FU
MAIN: IC208, IC306, IC317
SCHMITT INVERTER
(XY806A00)
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
TC7SH08FU
MAIN: IC220
AND
(XR680A00)
1 5
2
3 4
IN B
GND
Vcc
OUT Y
IN A
TC74VHC32FT
MAIN: IC210, IC213, IC216, IC217
OR
(XY945A00)
1
2
3
1A
1Y
4 2A
5 2B
6 2Y
7 GND
1B
14
13
12
Vcc
4A
11 4Y
10 3B
9 3A
8 3Y
4B
B1 21
23
V
CCA
V
CCB
24
B8 14
13 12 11
1
2 DIR
22 G
10 A8
3 A1
Logic
Level
Converter
Same as above block
V
CCA
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
GND
V
CCB
V
CCB
G
B1
B2
B3
B4
B5
B6
B7
B8
GND
(TOP VIEW)
INPUTS
OUTPUTS
FUNCTION
G
L
L
H
DIR A-BUS B-BUS
L
H
X
A=B OUTPUT INPUT
B=A INPUT OUTPUT
Z High lmpedance
X : Don't Care
Z : High lmpedance
1
2
3
4
5
6
7
8
9
10
11
12
15
14
13
18
17
16
21
20
23
24
22
19
TC74LVX4245FS (XU229A00)
MAIN: IC403
TRANSCEIVER
TC74VHC138FT
AES: IC202
MAIN: IC205, IC206
3-8 DEMULTIPLEXER
(XZ495A00)
1
2
3
4
5
6
7
A
A
Select
Enable
Output
Output
B
B
C
C
G2A
G2A
G2B
G2B
G1
G1
Y7 Y7 Y5
Y4
Y3
Y2
Y1
Y0
Y6
16
15
14
13
12
11
10
Vcc
YO
Y1
Y2
Y3
Y4
Y5
8
GND
9
Y6
1
2
3
4
7
6
5
8 1A
3Y
2A
GND
Vcc
1Y
3A
2Y
1
2
3
4
7
6
5
8 1A
3Y
2A
GND
Vcc
1Y
3A
2Y
TC74NHC163FT (X2378A00)
MAIN: IC313
TC7WH08FU (XW948A00)
MAIN: IC209
AND
Vcc
RIPPLE
CARRY
OUTPUT
OA
LOAD GND
ENABLE
P
1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
OC
OD
OB
CLEAR
CLOCK
A
B
C
D
R
C
OA
EN
T
EN
P
OC
OD
OB
CLEAR
CK
A
B
C
D
ENABLE
T
LO
AD
1
2
3
4
5
6
7
8
1A
1B
2Y
GND
V
CC
1Y
2B
2A
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