JLCooper MLA-1 User Manual
Page 7
MLA-1 / MLA-10
Installation/Operations Manual
J1 Connector
Pin
Name
Pin
Name
1
Chan 1 Out (-)
13
Chan 3 In (-)
2
Chan 1 Out (+)
14
Chan 3 In (+)
3
Chan 2 Out (-)
15
Chan 4 In (-)
4
Chan 2 Out (+)
16
Chan 4 In (+)
5 Chan
3
Out
(-) 17
Ground
6 Chan
3
Out
(+)
18
Ground
7 Chan
4
Out
(-) 19
Ground
8 Chan
4
Out
(+)
20
Ground
9 Chan
1
In
(-)
21
+9
VDC
10
Chan
1
In
(+)
22
+9
VDC
11
Chan
2
In
(-)
23
+9
VDC
12
Chan
2
In
(+)
24
+9
VDC
(Note that some units are silk-screened to have pins 9 thru 16 as channels 5 thru
8. The wiring is the same regardless.)
J2
This connector carries the actual MIDI signals, and must usually be brought to
normal 5 pin DIN connectors. Normally, these would be mounted to a wall plate.
Any type of wire may be used for these connections. The wiring is as follows:
J2 Pin MIDI Connector
J2 Pin
MIDI Connector
1
MIDI Out 1, pin 4
13
MIDI In 1, pin 4
2
MIDI Out 1, pin 2
14
No Connection
3
MIDI Out 1, pin 5
15
MIDI In 1, pin 5
4
MIDI Out 2, pin 4
16
MIDI In 2, pin 4
5
MIDI Out 2, pin 2
17
No Connection
6
MIDI Out 2, pin 5
18
MIDI In 2, pin 5
7
MIDI Out 3, pin 4
19
MIDI In 3, pin 4
8
MIDI Out 3, pin 2
20
No Connection
9
MIDI Out 3, pin 5
21
MIDI In 3, pin 5
10
MIDI Out 4, pin 4
22
MIDI In 4, pin 4
11
MIDI Out 4, pin 2
23
No Connection
12
MIDI Out 4, pin 5
24
MIDI In 4, pin 5
(Note that some MLA-1 metal work was silk-screened with MIDI Ins designated
as channels 5 thru 8. The wiring is the same regardless.)
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