Onkyo TX-SR602 Service Manual page 68

IC BLOCK DIAGRAMS AND DESCRIPTIONS
TC9164AF(Function switch)
2
S1
S2 3
S3
4
5
S4
6
COM1
S5
7
8
S6
9
COM2
10 10
S7
11 11
S8
12 12
COM3
13 13
ST
Pin No.
1
14
28
2,3,4,6,7,8,10,11
27,26,25,23,22,21,19,18
5,9,12
24,20,17
13
15
16
VSS GND VDD
1 14 14 28 28
SHIFT REGISTER
Symbol Function
Vss
Negative power supply
GND Ground
Positive power supply
VDD
Input/output terminals
S1~S8
S1~S8 Input/output terminals
Common terminals
COM1 ~ COM3
COM1 ~ COM3 Common terminals
ST Strobe input terminal for data reading
Clock input terminal for data transfer
C K
DAT A Data input terminal for switch
TX-SR602/E
S1
27 27
S2
26 26
S3
25 25
S4
24 24
COM1
23 23
S5
22 22
S6
21 21
COM2
20 20
S7
19 19
S8
18 18
17 17 COM3
16 16 DATA
CK
15 15