Apple Multiple Scan 15 AV Display (15-inch CRT) - Manual (Page 48)

Monitor cable specifications
m 15-pin miniature D-type connector
Pin Output signal
1 Red video ground
2 Red video
3 Not used
4 ID 1
5 Green video
6 Green video ground
7 ID 2
8 Not used
9 Blue video
10 ID 3
11 V Sync return
12 V Sync
13 Blue video ground
14 H Sync return
15 H Sync
Shell Shield ground
8 7 6 5 4 3 2 1
15 14 13 12 11 10 9
42 Appendix