Technics SX-PR603 Service Manual page 121

SCHEMATIC DIAGRAM-29
IC3
HD74LS138P
+5
(3 TO 8 DECODER)
1 16
A0 +VCC
2 A1 0 15
3 14
A2 1
4 13
CS2 2
5 12
CS3 Y 3
6 11
CS1 4
7 7 Y 5 10
8 9
GND 6
C7
0.1