Olivetti d-Copia 1801MF Plus Service Manual page 292

(1-3) Detaching and refitting the registration cleaner
Procedure
1. Open the front cover.
2. Release it by pinching the lock lever
and then remove the waste toner box
forward.
Front cover
Figure 1-5-15
Lock levers
Waste toner box
Figure 1-5-16
1-5-10
2NC/2NF/2NG/2NN/3P7/3P8/3P9