Any one else had this I have a Ricoh MP 4000 that is giving off an odor like "burnt" paper at standby,I replaced the fuser unit with a new one but the same odor remains once it is on for a few minutes it is a distinctive smell, like burnt paper, not that uh oh, burning silicon smell we all fear. I can't localize the smell it just kinda lingers in the area where the copier is. Any suggestions?