Denon AVR-2105 Service Manual page 23

QQ
3 7 63 1515 0
74LVX157
(IC810)
SE LECT 1
SEL
1A 2
1B 3
1Y 4
5 5
2A
2B 6
7
2Y
8
GND
SN74LVC139APWR (IC820)
1 16
1G V
CC
2 15 2G
1A
1B 3 14 2A
4 13 2B
1Y0
1Y1 5 12 2Y0
6 11 2Y1
1Y2
1Y3 7 10 2Y2
2Y3
GND 8 9
TE
L 13942296513
LED
SML1216W (LED901)
www
.
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16
Vcc
15
ST
14
4A
13
4B
12
4Y
11
3A
10
3B
9
3Y
30
FUNCTION TABLE
(each decoder/demultiplexer)
INPUTS
OUTPUTS OUTPUTS
SELECT
G G
B A Y3 Y2
L L L H H
L L H H H
L H L H L
L H H L H
H X X H H
x ao
y
i
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8
Y1 Y0
H L
L H
H H
H H
H H
Q Q
3 6 7 1 3
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.
23
AVR-2105/885 / AVC-1890
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
m
co
9 9
2 8 9 9