Need exploded view diagram for Brother 1870N - small part fell out

[GGD]

You might try this, the 1650 and 1870 were very similar.

http://www.eserviceinfo.com/downloadsm/1...-1650.html

I've got an 1870n also, if you could post a picture of the part, I could poke around to see if I can spot it in it's normal place.