Ricoh FAX2900L Operator's Manual page 136

G
Press down on the cassette until it locks into place.
Note
If you do not push the cassette right in, the top cover will not close.
H
Close the top cover.
Note
Background gray cast is sometimes evident on printed messages just after
installing a new toner cassette.
Replacing the Toner Cassette and Cleaning Pad
6
121