Yamaha DPX-530 Service Manual page 59

PCB-MAIN(2/3)
IC4A1 XC61FC2712MR
Vin
3
Delay
Circuit
Vref
2
Vss
IC4A3 TC7MH175FK
D1
4
1
CLR
R R R
D D D
Q
CK Q CK Q CK Q
9
CK
2 3
Q1
Truth Table
Inputs
CLR D
L X
L
H
H H
H
X
X: Don't care
IC4A4 NL17SZ00DFT2
1
5
B V
CC
2
A
3
4
GND Y
Vout
1
D2 D3
5 12
R R
D Q D Q
CK Q CK Q
7 6 10
Q 1 Q2 Q 2 Q3
Outputs
CK Q Q
X L
H
H L
L
H
Q Q No change
n n
FUNCTION TABLE
Output
Input
Y = AB
A B Y
L L H
L H H
H L H
H H L
D4
13
R
D Q
CK Q
11 15 14
Q 3 Q4 Q 4
Function
Clear
DPX-530
59