HP OfficeJet Pro 7740 Wide Format All-in-One Printer series , model: J3M72-80004

[jemia]

Printer head for HP Laserjet Pro 7740 printer, model: J3M72-80004

[Kuroi_Kenshi]

Hi @jemia,

Welcome to the HP Support Community! 

Thanks for reaching out about your query regarding your printer!

We're thrilled to have the opportunity to assist you and provide a solution.

The HP OfficeJet Pro 7740 printer is an InkJet printer, not a laser printer. It uses ink cartridges rather than a toner-based system typically found in LaserJet printers. If your inquiry was meant for the OfficeJet Pro 7740, here's some information:

Replacing the Printhead for HP OfficeJet Pro 7740

If you're experiencing issues that might require a printhead replacement, here are the steps to replace it:

Prepare the Printer:

• Ensure that you have the replacement printhead ready before removing the old one.

Access the Printheads:

• Open the ink cartridge access door and wait for the carriage to become idle.

Remove Ink Cartridges:

• Remove all the ink cartridges from the printhead by pressing down to release them.

Replace the Printhead:

• Lift the latch handle on the printhead assembly.
• Carefully remove the old printhead.
• Install the new printhead and ensure it is securely seated.
• Close the latch handle.

Reinsert Ink Cartridges:

• Ensure the cartridges are correctly installed by gently pushing them into place until they click.

Close the Ink Cartridge Access Door:

• Once all cartridges are installed and the printhead is secure, close the access door and let the printer perform any necessary alignments or checks.

I hope this helps.

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Best regards,