Onkyo TX-SR601/E Service Manual page 50

IC BLOCK DIAGRAMS AND DESCRIPTIONS
TC9164AF(Function switch)
2
S1
S2 3
S3 4
S4 5
6
COM1
S5
7
8
S6
9
COM2
10 10
S7
11 11
S8
12 12
COM3
13 13
ST
Pin No. Symbol
1 Vss
14
GND
28
VDD
2,3,4,6,7,8,10,11
S1~S8
27,26,25,23,22,21,19,18
S1~S8
5,9,12
COM1 ~ COM3
24,20,17
COM1 ~ COM3
13
ST
15 C K
16 DAT A
TC7WU04F(3 Inverters)
1A
1
3Y
2
2A
3
GND
4
VSS GND VDD
1 14 14 28 28
SHIFT REGISTER
Function
Negative power supply
Ground
Positive power supply
Input/output terminals
Input/output terminals
Common terminals
Common terminals
Strobe input terminal for data reading
Clock input terminal for data transfer
Data input terminal for switch
Vcc
8
1Y
7
Truth table
A
3A
6
L
2Y
5
H
Page 50
74HCU04F(Hex Inverters)
1
1A
S1
2
27 27 1Y
S2
3
2A
26 26
4
2Y
S3
25 25
3A 5
S4
24 24
3Y 6
COM1
23 23
7
GND
S5
22 22
Truth table
S6
21 21
A
COM2
20 20
L
S7
19 19
H
S8
18 18 TC74VHCT00AFT(2-input NAND gate)
COM3
17 17
1
1A
16 16 DATA
2
1B
3
1Y
CK
15 15
2A 4
5
2B
6
2Y
GND 7
Y
H
L
TX-SR601/E
14 Vcc
13 6A
12 6Y
5A
11
5Y
10
4A
9
8 4Y
(TOP VIEW)
Y
H
L
Vcc
14
4B
13
4A
12
4Y
11
3B
10
3A
9
3Y
8
A B Y
L L H
L H H
H L H
H H L