Amprobe DM 2 Pro

I have a Amprobe 2 Probe that I am trying to breath life back into. I am looking for a schomatic for this peace of equipment. I have tried Fluk witch owns Amprobe and I had no luck there. I have looked on line with no luck either. Does anyone have an Idea that might be able to help me?

Thank you
Jeff
KD9SCJ