Ricoh FAX2900L Operator's Manual page 207

Installation
B
Prepare the new toner cassette.
Important
Do not touch the green drum.
A Remove the new toner cassette from its bag. Do not remove any paper
or tape yet.
B Hold the cassette horizontally and shake it gently from side to side a
few times
C
Hold the cassette as shown and rest it in the machine. Make sure it fits in
the slots provided on either side.
Note
The slots are marked with small arrows.
10
192
TSTT070N
TSTT080N