Pin Function
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A1 Blue Video
A2 Green Video
A3 Red Video
1 Horiz. sync return
2 Vert. sync return
3 Sense #3
4 Sense ground
5 Csync
6 Horiz. sync
7 Vert sync
8 Sense #2
9 Sense #1
10 Csync return
Shell Shell ground
For the 21-inch color sense line configuration, sense lines 1, 2, and 3
(pins 3, 8, and 9) must all be tied to sense ground (pin 4).