Onkyo HT-R410 Service Manual page 37

IC BLOCK DIAGRAMS AND DESCRIPTIONS
TC74VHC541FT(Octal bus buffer)
1
G1
2
A1
A2 3
A3 4
5
A4
A5 6
A6 7
A7 8
A8 9
GND 10
TC7WU04FU(Triple inverter)
8 Vcc
1
1A
7 1Y
2
3Y
6
3 3A
2A
5 2Y
4
GND
TC7HTC7007AF(Hex buffer)
1
1A
2
1Y
2A 3
2Y
4
3A
5
3Y
6
GND
7
74HCU04F(Hex Inverter)
1A 1
1Y 2
3
2A
4
2Y
5
3A
6
3Y
7
GND
(TOP VIEW)
INPUTS
20 Vcc
19 G2
G2
G1
18 Y1
X
H
17
Y2
X H
16 Y3
L
L
15
Y4
L
L
14
Y5
X :Don't care
13
Y6
Z :High impedance
12
Y7
11
Y8
Vcc
14
6A
13
6Y
12
5A
11
5Y
10
4A
9
4Y
8
Vcc
14
6A
13
Truth table
6Y
12
A
11 5A
L
H
10 5Y
4A
9
4Y
8
OUTPUT
An
X Z
X Z
H H
L L
Y
H
L
HT-R410