Yamaha CRX-E300 Service Manual page 30

CRX-E300
QQ
3 7 63 1515 0
IC303: TC74HC4051AP (INPUT P.C.B.)
Analog Multiplexer/Demultiplexer
VSS
VEE
No. Name
1 X4
2 X6
3 X
4 X7
5 X5
6 INHIBIT
7 VEE
TE
L 13942296513
8 VSS
9 C
10 B
11 A
12 X3
13 XO
14 X1
16 VDD
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INHIBIT VDD
6 16
A
11
LEVEL BINARY TO 1-OF-8
B
10
CONVERTER DECODER WITH INHIBIT
C
9
8
7
X0
13 SW
X1
14 SW
X2 SW
15
X3
12 SW
X4
1
X5
5
X6
2
X7 4
STATION IN (TUNER)
Power Amp. excess current DC voltage detect IN
Heat sink (when abnormal) temperature detect IN
NC
/FLSW CD Feed End detect SW IN
/OPSW CD Tray OPEN detect SW IN
/CLSW CD Tray OPEN detect SW IN
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8
INPUT STATES
C B
INHIBIT
0 0
0 0
0 0
0 0
0 1
X
3
0 1
SW
0 1
SW
1
0
X
SW 1
SW
Function
Q Q
3 6 7 1 3
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2 9 9 4 2 8
"ON" CHANNEL (S)
A
0
0 0
1
0 1
1 0 2
1 1 3
0 0 4
0 1 5
1 0 6
1 1 7
X X NONE
[0: Station available]
[1: Abnormality exists]
1 5 0 5 8 2 9 9 4
[0:
m
co
9 9
2 8 9 9
]
[0: , 1: ]
[0: , 1: ]
[0: , 1: ]