Lexmark 28ET504 User Manual

Unpack the new toner cartridge, and then remove its packaging.

Align the new toner cartridge, and then press the cartridge down until it fits into place.

Slide and hold the release latch on the right side of the printer, and then slowly close the top door.

Seal the used toner cartridge in the bag that the replacement toner cartridge came in.

For more information, see 

Maintaining the printer

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