HP T2500 manual Loss of shadow or highlight details, Printer banding, Maintenance Clean printheads

colored crosses that may be used to identify the problem in question. The correct pattern is shown on the left, an example of misalignment on the right.

Loss of shadow or highlight details

Looking at pattern 16, you may find a problem with the color calibration of the printer (CLC process). If you can distinguish lightness steps beyond the upper and lower specified thresholds, then the printer is fine. Here you can see examples of correct functioning on the left, incorrect on the right.

If the printer does not pass this test, you should run a color calibration if the paper loaded in the printer can be calibrated (coated or glossy paper, for instance). The color calibration can be launched from the front

panel by pressing , then , then Image Quality Maintenance > Color calibration.

Printer banding

Looking at patterns 1, 2, and 3, you can see vertical banding problems due to a miscalibrated paper advance in the printer.

You can also see some banding in patterns 4, 9, 10, and 11, indicating that the printheads need to be cleaned.

You can launch printhead cleaning from the front panel by pressing , then , then Image Quality

Maintenance > Clean printheads.

ENWW Visual check for errors while printing the diagnostic sheet 223