After a bit of hunting on the net, I found this site:
Hard To Find Schematics For Commodore Hardware, which has a
link for the 1902A schematics, along with a little readme about its video pinouts, that says:
This NTSC monitor was made by Philips (NAP) and is very similar to the 1084.It has an 8 pin DIN for digital (TTL) RGBI, RCA jacks for composite video and
audio, and a 6 pin DIN for split (Y/C) video and audio inputs.
Just thought it might come in handy...
