Good thing I opened mine up, it's got a wicked cold solder joint on the S/PDIF out!
On mine (granted it's an AD500 but I'm assuming the 15 pins are the same), the S/PDIF is on pins 1 and 6, with the shield on pin 6 and the center connector on pin 1.
Power is red 15, black 14.
Hope this helps.
-JLW