Konica Minolta SD-501 - Manual (Page 11)

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Inserting a New Staple Cartridge into SD-501 Saddle Stitcher
When the staple cartridge of the SD-501 Saddle Stitcher is empty, the Cartridge
indicator lights in red in the option status area of the Machine Status Screen.
If printing job is in progress, a message will be displayed on the Copy Screen.
Follow the procedure below to replace the staple cartridge.
1.
Open the left side door of the Saddle Stitcher.
2.
Remove the empty cartridge.
Hold both left and right sides of the staple cartridge, then draw it forward.