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Replacing the Printhead for HP Officejet 7500A Wide Format e-All-in-One Printer Series


Install a new printhead assembly when the existing printhead assembly is damaged or is incompatible with the printer. Replacement printhead assemblies are only available from HP Support or authorized service providers.

Ordering the printhead assembly

  1. If you are in Asia Pacific, the site directs you to a service center in your area.
  2. Search for part number CN643A.
  3. Follow the instructions to order the printhead assembly.

Replacing the printhead

Follow these steps to replace the printhead.

Video of replacing the printhead

Watch this video to learn how to replace the printhead, or continue to the following steps for detailed instructions. The printer in the video is different than your printer, but the steps are the same.

Step one: Load paper in the input tray

  1. Raise the output tray.
    Figure : Raise the output tray.
    Illustration of raising the output tray
  2. Slide the paper widthguide to its outermost position.
  3. Insert a stack of Letter or A4-size paper stack into the input tray with the short edge forward and the printside down.
  4. Position the stack of paper against the right side of the input tray, and then slide the stack forward until it stops.
  5. Adjust the paper width guide so that it rests against the stack of paper. Do not push the guides in so tightly that they bind against the paper.
      Figure : Load the paper tray
      Illustration of loading the paper tray
    1. Slide the paper forward until it stops
    2. Adjust the paper width guide
  6. Lower the outputtray.

Step two: Remove the old printhead

Do not remove the cartridges until you have the replacement printhead assembly available.
  1. Open the cartridge access door. The carriage moves to the center of the printer. Wait until the carriage stops moving before you proceed.
    Figure : Open the cartridge access door
    Illustration of opening the cartridge access door.
  2. Press in the tab on the front of each cartridge, and then pull it out and up to remove it from its slot.
    Figure : Remove the cartridge
    Illustration of removing the cartridge
  3. Lift the gray latch on the carriage.
    Figure : Lift the gray latch
    Illustration of lifting the gray latch
  4. Remove the old printhead from the carriage.
    Figure : Remove the old printhead
    Illustration of removing the old printhead

Step three: Install the new printhead

  1. Remove the new printhead from its packaging.
    Figure : Remove the new printhead
    Illustration of the removing the new printhead from its packaging
  2. Hold the printhead upright, with the color-coded icons facing up.
    Figure : Hold the printhead upright
    Illustration of holding the new printhead
  3. Lower the printhead into the printer so that the purple and green blocks on the printhead align with the purple and green blocks on the carriage.
    Figure : Insert the printhead
    Illustration of lowering the new printhead
  4. Slowly lower the gray latch until it rests securely on the carriage.
    Figure : Lower the gray latch
    Illustration of installing the new printhead

Step four: Install the cartridges

Choose one of the following options for installing the cartridges in the new printhead.
When you install a new printhead, HP recommends that you use new cartridges. You can reuse your existing cartridges, but if they are low on ink, the calibration of the new printhead could result in a low ink condition. It is best to have new cartridges on hand when replacing the printhead.

Step five: Return the failed parts to HP

HP will analyze the failed parts to improve its products in the future. If the new printhead assembly came with a prepaid mailing label and return instructions, follow these steps to return the failed parts to HP.
HP does not always ask that customers return all failed parts, so you might not have a prepaid mailing label and return instructions. You can ignore these steps if you did not receive the return documents.
  1. Put the old printhead assembly into the package that the new part came in.
    Figure : Put the failed printhead in the package
    Illustration of placing old printhead in new packaging
  2. Peel off the lid sticker labeled ‘B’ and use it to seal the printhead assembly package.
    Figure : Peel off sticker B
    Illustration of peeling off sticker B
    Figure : Seal the package with sticker B
    Illustration of package with sticker
  3. Use the orange caps from the new cartridges to cap the old cartridges.
    Figure : Cap the old cartridges
    Illustration of old cartridges with new capsWhile five cartridges are pictured, your printer might have a different number of cartridges.
  4. Put the old parts and the form that came with the new parts into the box the new parts came in. If possible, also include a print sample showing the issue with the old printhead.
    Figure : Put the old parts into the box
    Illustration of putting old parts in the new box
  5. Close the box, apply the prepaid mailing label, and then put the package in the mail.
    Figure : Send the package back to HP
    Illustration of box and HP logo






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