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HP Designjet Z2100 Photo Printer Series - Printhead Alignment

Introduction

Precise alignment between printheads is essential for accurate colors, smooth color transitions, and sharp edges in graphical elements. Printer has an automatic printhead alignment process which runs whenever a printhead has been accessed or replaced.
In cases where the paper has jammed and custom paper is used, or an issue is being experienced with color accuracy, the printheads may need to be aligned.
note:
If the paper has jammed, it is recommended to reinsert the printheads and initiate the realignment procedure with the (Image Quality Maintenance) menu icon.
  caution:
Do not use transparent and semi-transparent paper to align the printheads. Photo paper is recommended for the best quality.

Reinsert printheads procedure

Follow the procedure given below to reinsert the printheads:
  1. If the realignment process is running and the wrong paper is loaded, press the Cancel key on the front panel.
      caution:
    Do not print if the realignment process has been canceled. The alignment can be restarted with the Image Quality Maintenance menu procedure.
  2. Load the desired paper. Roll or cut sheet can be used. However, it must be A3 landscape or larger.
      caution:
    Do not use transparent and semi-transparent paper to align the printheads. Photo paper is recommended for the best quality.
  3. Remove and re-insert all the printheads. This starts the printhead alignment procedure.
  4. Ensure the transparent window is closed, as a strong light source near the printer during printhead realignment can affect alignment.
    Figure : Closing the window
  5. The process takes about six minutes. Wait until the front-panel display shows the process complete before using the printer.
    note:
    The printer prints a calibration image. Do not worry about the image. The front-panel display may shows any errors in the process.

Image Quality Maintenance menu procedure

Following is the image quality maintenance menu procedure:
  1. Load the desired paper. Roll or cut sheet can be used. However, it must be A3 landscape or larger (420 by 297 mm).
      caution:
    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 key to return to the main menu and select the (Image Quality Maintenance) menu icon, then Align printheads. The printer checks to see if it has enough paper to run the realignment.
  3. If the loaded paper is satisfactory, the printer runs the realignment and prints a realignment pattern. Ensure the transparent window is closed, as a strong light source near the printer during printhead realignment can affect alignment.
    Figure : Closing the window
  4. The process takes about 5 minutes. Wait until the front-panel display shows the process complete message, before using the printer.

Scanning errors during alignment

If the alignment process fails, a Scanning problem message appears on the front panel. This means that the alignment has not completed successfully. Therefore the printer is not aligned and the alignment should be repeated before printing with good image quality.
The issue may be due to the following reasons:
  • The paper used was not valid, repeat the alignment with valid paper.
  • Printhead health problems, clean the printheads.
  • The alignment was done with the transparent window open, repeat the alignment with the window closed.
If the issue persists after cleaning the printheads, using valid paper, and keeping the window closed, there may be a failure in the scanning system needing reparation of the printheads. Although clean, they may not work and need to be replaced.