6Maintain and troubleshoot
•Troubleshooting tips and resources
•Poor print quality and unexpected printouts
Work with print cartridges
•Clean the print cartridge contacts
•Clean the area around the ink nozzles
Print cartridges
You can find the cartridge number on the label of the print cartridge you are replacing. The HP Fax uses the following print cartridges:
•HP 21 black inkjet print cartridge
•HP 22
•HP 54 black inkjet print cartridge
NOTE: Ink from the cartridges is used in the printing process in a number of different ways, including in the initialization process, which prepares the HP Fax and cartridges for printing. In addition, some residual ink is left in the cartridge after it is used. For more information see www.hp.com/go/inkusage.
NOTE: Ordering print cartridges online is not supported in all countries/regions. If it is not supported in your country/region, contact a local HP reseller for information about purchasing print cartridges.
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