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HP Designjet T790, T1300 and T2300 ePrinter Series - Printhead information, replacement and alignment

Obtaining Printhead Information

  1. Press on the Information icon.
    Figure : Information icon
  2. Press on the Printhead Menu icon and the following screen is displayed, press on the printhead that you want information on.
    Figure : Printheads
  3. The Touch Control Panel displays information on the selected printhead.
    Figure : Printhead information
    The information supplied is:
    • The current status of the printhead.
    • The color of the printhead.
    • The make of the printhead (HP no.72 is recommended).
    • The product number of the printhead.
    • The serial number of the printhead.
    • How much ink has been fired (consumed) by the printhead.
      note:
      It is possible for a printhead to consume more than one Ink Cartridge.
    • The current warranty status of the printhead.

Changing a Printhead

To change a printhead there are two methods, the first is shown below by using the Printhead tab, the second method is to access the main menu option (refer to the User's Guide for further details).
  1. Press on the Information icon.
    Figure : Information icon
  2. Press on the Printhead Menu icon and the following screen is displayed. Press on the Replace Printhead tab.
    Figure : Replacing Printheads
  3. A screen is displayed, showing an animation of how to install the printhead(s).
  4. The product moves the Carriage to the correct position to replace printheads.
    note:
    If the carriage is left in the removal position for more than three minutes without inserting or removing any printheads, it will try to move back to its normal position at the right-hand end.
  5. Open the Scanner (MFP only) or Window.
    Figure : Opening the Scanner
  6. Locate the carriage on the right side of the product.
  7. Pull the blue handle up and toward you to release the Carriage Cover.
    Figure : Releasing the Carriage Cover
  8. Push the handle back.
    Figure : Pushing the handle back
  9. This gives you access to the printheads.
    Figure : Securing access to the printheads
  10. The following screen is displayed
    Figure : Printheads
  11. Remove a printhead by lifting up the blue handle.
    Figure : Lifting up the blue handle
  12. Using the blue handle, use steady force to disengage the printhead.
    Figure : Removing the printhead
  13. Pull the blue handle upward until the printhead is released from the carriage.
      caution:
    Do not pull abruptly because this can damage the printhead.
    Figure : Releasing printhead from the carriage
  14. The Touch Control Panel display identifies the missing printhead.
  15. To insert a new printhead first remove the orange protective caps.
    Figure : Removing the protective caps of the new printhead
  16. Insert the new printhead into its correct slot in the carriage.
      caution:
    Insert the printhead slowly and vertically, straight down. It may be damaged if you insert it too fast, or at an angle, or if you rotate it as you insert it.
    Figure : Inserting the new printhead
  17. Push down as indicated by the arrow shown below.
    Figure : Positioning the printhead
      caution:
    When installing the new printhead there may be some resistance, so you need to press it down firmly but smoothly. You should hear a beep and see confirmation on the Touch Control Panel display that the printhead has been inserted.
  18. Insert all other printheads that need to be installed, and close the carriage lid.
    Figure : Closing the carriage lid
  19. Ensure the end of the blue handle catches the wire loop on the near side of the carriage.
    Figure : The end of the blue handle catching the wire loop
  20. Lower the handle to rest on the carriage cover.
    Figure : Lowering the handle
    When all the printheads have been inserted correctly and are accepted by the product, the product beeps.
    note:
    If the product does not beep when you insert the printhead and the Replace message appears on the Touch Control Panel display, the printhead may need to be reinserted.
  21. Lower the scanner.
    Figure : Lowering the scanner
  22. The Touch Control Panel display confirms that all printheads are correctly inserted. The product starts checking and preparing the printheads. The default routine process, when all printheads are changed, takes 10 minutes. If the product finds problems in preparing the printheads, it takes longer, up to 45 minutes. For a single printhead insertion, the times vary between 2 and 40 minutes. After all printheads are checked and prepared, the printhead realignment procedure runs automatically if paper is loaded.
    The Touch Control Panel display confirms that all printheads are correctly inserted.
    The product will start checking and preparing the printheads. The default routine process, when all printheads are changed, takes 25 minutes. If the product finds problems in preparing the printheads, it will take longer, up to 55 minutes. For a single printhead insertion, the times vary between 15 and 35 minutes. After all printheads are checked and prepared, for the printhead realignment.

Aligning Printheads

Precise alignment between printheads is essential for accurate colors, smooth color transitions, and sharp edges in graphical elements. Your product has an automatic printhead alignment process which runs whenever a printhead has been accessed or replaced.
In cases where the paper has jammed, you have used a custom paper, or are experiencing problems with color accuracy you may need to align the printheads. If the paper has jammed, it is recommended that you reinsert the printheads and initiate the realignment procedure with the Image Quality Maintenance menu.
note:
Do not use transparent and semi-transparent paper to align the printheads. Photo paper is recommended for the best quality.
Reinsert Printheads Procedure
  1. If the realignment process is running and the wrong paper is loaded, press the Cancel button on the Touch Control Panel. Do not print if the realignment process has been canceled. You can restart the alignment with the Image Quality Maintenance menu procedure.
  2. Load the paper you wish to use. You can use a roll that is at least 610 mm (24 in) wide or a cut sheet that is A2 landscape or larger.
  3. Remove and re-insert all the printheads. This will start the printhead alignment procedure.
  4. The process will take about six minutes. Wait until the Touch Control Panel display shows the process complete before using the product.
Image Quality Maintenance Procedure
  1. Load the paper you wish to use. You can use a roll that is at least 610 mm (24 in) wide or a cut sheet that is A2 landscape or larger. Do not use transparent and semi-transparent paper to align the printheads. Photo paper is recommended for the best results; plain, bond and thin coated papers provide acceptable but marginal results.
  2. Press the Menu button to access the main menu and select the Image Quality Maintenance menu icon.
  3. Select Align printheads. The product will check to see if it has enough paper to run the realignment.
  4. The realignment procedure will now be performed and the realignment pattern will be printed.
  5. The process will take about five minutes. Wait until the Touch Control Panel display shows the process complete before using the product.
Scanning errors during alignment
If the alignment process fails, a scanning error message is displayed on the Touch Control Panel. This means that the alignment has not completed successfully. The problem may be due to:
  • The paper used was not valid, repeat the alignment with valid paper.
  • Printhead health problems, clean printheads.
  • The alignment was done with the Scanner open, repeat the alignment with the cover closed.
If the problem persists after using valid paper, cleaning the printheads, and keeping the cover closed, there may be a failure in the scanning system needing reparation or the printheads, although clean, may not work and need to be replaced.

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