HP Designjet T2300 HP Designjet T2300 eMFP Printer series - Image Quality Trou - Page 24

Line discontinuities - scan setting

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Scan-quality issues 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 scanners. 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 31. You might also want to deactivate the automatic de-skew algorithm as indicated in A copied or scanned image is very skewed on page 36. 3. If there is no skew but the problem persists, clean and calibrate the scanner as indicated in Scanner maintenance on page 37. Take care not to move the product 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 20 Chapter 3 Troubleshooting scan-quality issues ENWW

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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
scanners. 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
31
. You might also want to deactivate the automatic
de-skew algorithm as indicated in
A copied or scanned image is very skewed
on page
36
.
3.
If there is no skew but the problem persists, clean and calibrate the scanner as indicated in
Scanner maintenance
on page
37
. Take care not to move the product 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
20
Chapter 3
Troubleshooting scan-quality issues
ENWW
Scan-quality issues