Pioneer PX-7 Service Manual page 10

(7)
Keyboard
interface
connector
Pin
No. Signal
I/O
1
D6
I
2
D5
I
3
D2
I/O
4 D1 I/O
5
D7
I
6
D3
I
7
D4
I/O
8
DO
I/O
9
+
5
V
10
STB
0
11
GND
12
CAPS
0
13
GND
(8)
Printer
connector
Pin
No. Signal
I/O
1
PSTB
0
2
PDBO
o
3
PDB1
0
4
PDB2
o
5
PDB3
o
6
PDB4
0
7
PDB5
o
8
PDB6
o
9
PDB7
o
10
NC
11
BUSY
I
12
NC
13
NC
14
GND
Round
13-pin
connector
Amphenol
14-pin
connector