I'm trying to get the same thing working in a jamma cabinet with no luck. Did you have to do anything else to get this to work? I'm using a JROK multiwilliams board as a test case. If I get vertical and horizontal sync directly from the board and use the vga connector on the d9500, everything works fine. If I use the 10-pin PCBA connector and use the composite sync off the jamma connector, the d9500 syncs, but I get black video.
Any ideas?