4Supplies & handling4-20CS655 ProInserting a new staple cartridge into Finisher FS-607When the staple cartridge of the Finisher FS-607 becomes empty, the Staple Cartridge indicator lights in redin the option status area of the Machine Status Screen.Follow the procedure below to replenish staples.1Open the Finisher door.2Pull out the stacker unit.–Pull out the stacker unit slowly by holding the stacker unithandle until it stops.