NOTE:  "X" = grounded.  Pins 12,16,23,29 are jumpered to ground.
Channel Pin 25 Pin  24 Pin  17 Pin  13
1 X X X X
2 X X X
3 X X X
4 X X
5 X X X
6 X X
7 X X
8 X
9 X X X
10 X X
11 X X
12 X
13 X X
14 X
15 X
16