HP Deskjet 6840 Printer series - Cleaning instructions

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Cleaning instructions

1. Lightly moisten a cotton swab with distilled water and squeeze any excess

water from the swab.

2. Wipe the print cartridge copper contacts with the cotton swab.

Caution: Do not touch the print cartridge ink nozzles. Touching the ink

nozzles will result in clogs, ink failure, and bad electrical connections.

1. Clean only the copper contacts

Repeat this process until no ink residue or dust appears on the swab that you

use to clean the contacts.

3. Insert the print cartridges in the printer, and then close the printer cover.