Yamaha DCU5D Service Manual page 16

DCU5D
QQ
3 7 63 1515 0
TC7SH32FU (XW633A00)
DM: IC22
2-Input OR Gate
IN B
1
IN A
2
3
GND
SN74AHCT1G08DCKR (X0158A00)
DM: IC23
Single 2-Input Positive-AND Gate
1
A
2
B
3
GND
FUNCTION TABLE
INPUTS OUTPUT
A B
TE
L 13942296513
H H
L X
X L
AM26LS31CNSR (XU996A00)
DM: IC35, 41-45
Quad Line Driver
1A 1
1Y
2
1Z 3
ENABLE G
4
2Z
5
2Y 6
2A 7
GND
8
INPUT ENABLES OUTPUTS
A G G Y
H H X H
L H X L
www
H X L H
L X L L
X L H Z
.
16
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TC7SH04FU (XS775A00)
DM: IC18, 28, 301, 302
Inverter Gate
NC
Vcc
5
IN A
GND
4
OUT Y
AM26LS32ACNSR (X3251A00)
DM: IC36-40, 46
Quadruple Differential Line
Receivers
5 Vcc
4
Y
Y
H
L
L
16 Vcc
15 4A
4Y
14
13 4Z
12
ENABLE G
11
3Z
10 3Y
3A
9
Z
L
H= high level
H
L= low level
L
X= irrelevant
H
Z= high impedance (off)
Z
x ao
y
i
8
1 5 Vcc
2
3 4
OUT Y
1B Vcc
1 16
1A 4B
2 15
1Y 4A
3 14
G 4Y
4 13
2Y G
5 12
2A 3Y
6 11
Q Q
2B 3A
7 10
3 6 7 1 3
GND
8 9 3B
u163
.
2 9 9 4 2 8
TC7WU04FU (XQ805A00)
ES: IC001
Triple Inverter
1A Vcc
1 8
3Y 1Y
2 7
2A 3A
3 6
GND 2Y
4 5
EACH RECEIVER
INPUTS
OUTPUT
ENABLES
DIFFERENTIAL
Y
G G
A–B
H X H
V ID V IT+
X L H
H X ?
V IT– V ID V IT+
X L ?
H X L
V ID V IT–
X L L
L H Z
X
1 5 0 5 H 8 2 9 X 9 4 H
Open
X L H
H=high level, L=low level, ?=indeterminate,
X=irrelevant, Z=high impedance (off)
m
co
9 9
2 8 9 9