JVC KD-SX60WT Service Manual page 29

6.2 HA17558F (IC571) : Ope. amp.
• Pin layout & Block diagram
1
2
3
4
GND
6.3 MM74HC126SJ-X (IC691) : 3-state Quad buffer
• Pin layout & Block diagram
Vcc 8
7
6
5
• Truth table
INPUT OUTPUT
A C Y
H H H
L H L
X L Z
H : High level
L : Low level
X : Don't care
Z : Hi-Z
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