HP T2500 manual Line discontinuities

Actions

1.Re-scan the original, setting the content type to Image, and contrast and background cleaning to zero.

2.If the problem persists, re-scan the original at a lower scanner resolution (Standard quality if scanning, Fast or Normal if copying). It may also help to flatten the original manually as much as possible before scanning it again.

NOTE: The problem of wrinkles cannot always be solved, due to the technological limitations of CIS technology. HP offers HD Scanners with CCD technology for higher quality requirements. If the wrinkles remain after the corrective actions explained above, then no further action can be taken to improve the image quality, except to buy a more expensive CCD scanner.

Line discontinuities

When scanning or copying large originals, you may sometimes find issues such as that shown in the following image, where a straight line (it does not necessarily have to be horizontal) appears with discontinuities or small steps. Please note the black arrow indicating the scanning direction in this example.

Actions

1.Repeat the scan, and this time make sure that the product is correctly positioned (it is flat on the floor and it does not move), and that the printer is not printing while you scan. Turning the original 90 or 180 degrees and scanning it again may also solve the problem.

2.If the problem persists, check that the original to be scanned is not skewed, and that it does not become skewed during the scan. If so, please refer to Incorrect paper advance, skew during scanning, or horizontal wrinkles on page 214. You might also want to deactivate the automatic de-skew algorithm as indicated in A copied or scanned image is very skewed on page 219.

3.If there is no skew but the problem persists, clean and calibrate the scanner as indicated in Scanner maintenance on page 156. Take care not to move the printer during the calibration (the printer should not be printing during scanner calibration), and check that the maintenance sheet is correctly positioned before starting the calibration. Also check that the maintenance sheet is not damaged before calibrating the scanner (an old or damaged maintenance sheet may cause this problem); if it is damaged, call HP support and ask for a new maintenance sheet.

4.If the problem persists, proceed to analyze the following areas of the diagnostic plot:

ENWW Line discontinuities 203