automatic needle threader

I have a pr-620 and am having trouble with the automatic needle threader. I can see that it is off center of the needle, but don't know how to fix it. Does someone know if this is something I can adjust myself, or do I have to have a technician to fix it. We live in the boonies and there are no brother techs close around. Thanks in advance for any help you can give me. It's very annoying.