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HP Designjet T7100 and T7100 Monochrome Printer Series - Align the printheads

Precise alignment between printheads is essential for accurate colors, smooth color transitions and sharp edges in graphical elements. Your printer has an automatic printhead alignment process which runs whenever a printhead has been accessed or replaced.
If the paper has jammed or you are experiencing problems with color accuracy, you may need to align the printheads.
  note:
If the paper has jammed, it is recommended that you reinsert the printheads and initiate the realignment procedure with the Image Quality Maintenance menu .
  caution:
Do not use transparent or semi-transparent paper to align the printheads.
Reinsert printheads procedure
  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. You can restart the alignment with the Image Quality Maintenance menu procedure.
  2. Load the paper you wish to use, see Handle the paperHandle the paper. It should be at least 420 mm wide.
      caution:
    Do not use transparent or semi-transparent paper to align the printheads.
  3. Remove and re-insert all the printheads, see Remove a printheadRemove a printhead and Insert a printheadInsert a printhead. This starts the printhead alignment procedure.
  4. Ensure the window is closed, as a strong light source near the printer during printhead realignment can affect alignment.
  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 shows any errors in the process.
Image Quality Maintenance menu procedure
  1. Load the paper you wish to use, see Handle the paperHandle the paper. It should be at least 420 mm wide.
      caution:
    Do not use transparent or semi-transparent paper to align the printheads.
  2. From the front panel, 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 window is closed, as a strong light source near the printer during printhead realignment can affect alignment.
  4. The process takes about five minutes. Wait until the front-panel display shows the process complete before using the printer.
Scanning errors during alignment
If the alignment process fails, a Scanning problems 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. Possible reasons for failure:
  • The paper used was not acceptable; repeat the alignment with a different paper type.
  • The printheads are not clean; see Clean (recover) the printheadsClean (recover) the printheads.
  • The window was open; repeat the alignment with the window closed.
If the problem persists after correcting these potential problems, there may be a failure in the scanning system requiring repair, or the printheads may need to be replaced.

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