Lexmark Z600 - Manual (Page 43)

Replacing the print cartridges
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3 Squeeze the tabs on the cartridge lids, then lift the lids.
4 Remove the used cartridges. Store them in an airtight container or dispose of them properly.
Installing the cartridges
1 If you are installing new cartridges, remove the sticker and transparent tape from the back
and bottom of the cartridges.
Warning: Do not touch or remove the gold contact areas on the back and bottom of the
cartridges.