Toshiba e-studio 557 Quick Start Manual page 40

Chapter 3 MAINTENANCE
Stapler Unit of Saddle Stitch Finisher (MJ-1029)
1
Open the front cover of the Finisher.
2
Take off the staple cartridge.
3
Press the buttons on both sides of the cartridge
and take out the empty staple case.
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4
Install a new staple case into the staple cartridge
and pull out the seal.
5
Install the staple cartridge onto the stapler.
6
Close the front cover of the Finisher.