Sharp DM-3551 Operation Manual page 283

7
Push the cartridge in until it locks securely into
place.
8
Gently remove the sealing tape from the
cartridge.
9
Return the cartridge lock lever.
10
Close the front cover.
NOTE
Do not shake the developer cartridge after the sealing tape has been removed. If the cartridge is shaken after the tape is
removed, some developer will come out of the cartridge.
The machine will become
ready after about two
minutes.
7