The SAA7220 digital output is just for the CD-Player side, for digital outputs "Optical" and "Coaxial 1/2" that exit from the CD Player side. Basically the 4x OS filter side is not connected to anything.
YM2637B with some "glue" logic takes care of sending the SPDIF from Digital Inputs thru the TDA 1541 DAC.
So it is just one DAC.
Service manual for CD-95 is basically just an addendum, it makes refference to the CD-12 schematic.