Regardless of the age of the Mitsubsihi Rear Projection TV, it will DISPLAY 3D only as checkerboard. If the TV accepts T/B or SBS, it converts these to checkerboard. If the TV does not accept T/B or SBS and you are using the 3DA-1 or 3DC-1000, that adapter is converting the signals to checkerboard. 2009 models did not accept T/B or SBS so those models would required the adapter.
Checkerboard is like frame sequential but instead of full frame left eye followed by full frame right eye (frame sequential) it is checkerboard frame left eye (black squares of the checkerboard) followed by chckerboard frame right eye (red squares of the checkerboard).