Onkyo TX-SR701 Service Manual page 53

IC BLOCK DIAGRAMS AND DESCRIPTIONS
TC9274F-020 (Analog switch)
R - c h
S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15
3 3 3 2 3 1 3 0 2 9 2 8 2 7 2 6 2 5 2 4 2 3
3 4
S 4
3 5
S 3
3 6
S 2
3 7
S 1
3 8
V D D
3 9
N C
4 0
V S S
4 1
S 1
4 2
S 2
4 3
S 3
4 4
S 4
1 2 3 4 5
S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15
TC74VHC74FT(Dual D-FF with preset and clear)
1CLR
1
1D
2
CK D
Q Q
1CK
3
1PR
4
1Q
5
CK D
1Q
6
Q Q
GND
7
74VHCU04FT(Hex Inverter)
1
1A
2
1Y
3
2A
4
2Y
5
3A
6
3Y
7
GND
(TOP VIEW)
S 1 6
2 2
S 1 7
2 1
S 1 8
2 0
1 9 S T B
1 8 DATA
1 7 N C
C K
1 6
G N D
1 5
S 1 8
1 4
S 1 7
1 3
1 2 S 1 6
6 7 8 9 1 0 1 1
L - c h
14 Vcc
CLR
13 2CLR
L
12 2D
H
11 2CK
L
10 2PR
H
H
9 2Q
H
8 2Q
Vcc
14
6A
13
Truth table
6Y
12
A
11 5A
L
H
10 5Y
9 4A
8 4Y
Page 53
S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15
33 32 31 30 29 28 27 26 25 24 23
S4 34
35
S3
36
S2
37
S1
38 18 bits LATCH CIRCUIT
VDD
NC 39
VSS 40
S1 41
42
S2
43
S3
Same as R-ch
44
S4
1 2 3 4
S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15
INPUTS OUTPUTS
PR D CK Q
H X X L
L X X H
L X X H
H L L
H H H
H X Qn
X: Don't care
Y
H
L
TX-SR701/E
(R-ch)
LEVEL
SHIFT &
SHIFT
REGISTER
CIRCUIT
(L-ch)
5 6 7 8 9 10 1 1
FUNCTION
Q
H CLEAR
L PRESET
H
H
L
Qn NO CHANGE
S16
22
S17
21
S18
20
STB
19
DATA
18
NC
17
CK
16
GND
15
S18
14
S17
13
S16
12