How to Correctly Install a New Print Head: Step-by-Step Guide & Precautions

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If the nozzle check appears normal but the printout consistently has breaks, carefully observe the nozzle check pattern—you will likely find the pattern is somewhat distorted. This is caused by a misaligned print head. Use the print head calibration tool in the application software once or multiple times until the print head is properly calibrated.

Installation and Replacement of the Print Head

  1. When installing the print head, strictly follow the instructions to remove the air hole seal. Do not randomly peel off other seals, as this may cause ink leakage.
  2. Generally, clean the print head 3-5 times each time a new print head is installed.
  3. If any print head is out of ink or not installed, the wide-format printer will not work even if other print heads have ink.
  4. Once a new print head is installed, do not remove it unless it needs to be replaced.
  5. Do not open the print head protection clip except when replacing the print head; otherwise, the print head may become unusable.
  6. Do not insert your hand into the wide-format printer or touch the print head while it is in operation.
First, check if the ink of a specific color in the cartridge has been used up, then consider the following possible causes:
  • The label (i.e., the yellow sticker) was not completely removed as instructed, leaving the air guide groove and air guide holes sealed. Air cannot enter the print head in this case—simply peel off the label entirely.
  • Small air bubbles remain in the nozzles. Clean the print head to expel the bubbles.
  • Air in the ink tube or impurities inside the print head. To resolve this, run the printer’s automatic cleaning program 1 to several times (Note: After each cleaning, you must print a nozzle check pattern—test line—to check the cleaning effect). Alternatively, turn off the printer and let it sit unused for several hours to see if the issue improves. If the problem persists, professional repair is recommended.

The appearance of slight white lines in prints may be due to paper dust particles on the surface of low-quality paper adhering to the print head after long-term use, causing partial nozzle clogging. Clean the print head first; if the issue remains unresolved, send the printer to a service center for repair.

The presence of lines in printed graphics is related to the selected print mode. For example:
  • Printing with the 850 model in ink-saving mode results in rough, lined output.
  • Printing at 360 DPI produces smoother output.
  • 720 DPI is typically used for color printing, and 1440 DPI can be selected for optimal results.
The quality of the printed graphic is also related to its original resolution—the higher the resolution, the better the print quality. This indicates that print output is not only related to the print head but also closely linked to the graphic itself and print settings.

If the printer still fails to print normally after ruling out the above causes and cleaning the print head via the cleaning program, the print head may be defective (the typical service life of a print head is 800-3000 milliliters of ink used).

                                                                                                     Reprinted from zzskycolor

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