Ricoh A251 Operating Instructions Manual page 131

4 Flip the two latches on each side of the paper
spool.
5 Remove the spool.
6 Press and hold the lock on the spool and pull
the spool out of the roll.
Throw the old roll away.
7 Press and hold the lock on the spool and insert
the spool into a new roll.
46
SM029
SM030
SM031
SM032