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how take out print head DeskJet 3720 for cleaning?

HP Recommended
DeskJet 3720
Mac OS X 10.8 Mountain Lion

I need to manually clean the print head and don't know how to safely take it out

HP Support Agent
HP Support Agent
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Hi @Kathleen27,


I'd like to help!


Could you brief me on the printer issue?


The printer head on this printer cannot be removed or replaced.

The printer uses 2 ink cartridges, you could try cleaning the ink cartridges.


Clean the electrical contacts

Remove the cartridge indicated by the error message, clean the electrical contacts, and then reinsert the cartridge in its color-coded slot.

  1. Turn the printer on.
  2. Open the door to access the cartridges.
  3. Wait until the carriage stops moving before you continue.
  4. Remove the cartridge indicated in the error message from its slot, holding it by its side.
       CAUTION: Do not touch the copper-colored contacts or the ink nozzles. Touching these parts can result in clogs, ink failure, and bad electrical connections.
  5. Remove any protective tape that still might be on the contacts.
       CAUTION: Do not touch or try to remove the copper electrical strip
  6. Lightly dampen a lint-free cloth with distilled water, and then clean only the copper-colored contacts on the cartridge.
  7. Lightly dampen a lint-free cloth with distilled water, and then clean the electrical contacts in the carriage, located inside the printer.
  8. Wait 10 minutes for the contacts to dry.
  9. Reinsert the cartridge.
    • Insert the black cartridge into the right slot.
    • Insert the tri-color cartridge into the left slot.
  10. Repeat these steps for the other cartridge, if necessary.
  11. Close the cartridge access door.
  12. If the error persists, repeat the previous steps to clean the cartridge and carriage contacts a second time.

Hope this helps! Keep me posted. 


And, Welcome to the HP Support Community. 


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