Ricoh H545 Operator's Manual page 165

D
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.
E
Close the top cover.
Note
Background gray cast is sometimes evident on printed messages just after
installing a new toner cassette.
TSTT090N
TSTC030N
Installing The Toner Cassette
8
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