Olivetti d-Copia 3001MF Operation Manual page 310

Separator
Clean the separator regularly (at least monthly) to ensure optimum output quality.
1
Open the front cover.
2
Remove cleaning brush (blue colored).
3
Pull up and open left cover 1.
4
As shown in the figure, clean dirt from the separator
by moving the brush from side to side along the
separator.
9-4
Maintenance