HP DesignJet T850 DesignJet T850 Printer Series DesignJet T950 Printer SeriesU - Page 151

Vertical distortion, Object replication (ghosting)

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call HP support and report "completely wrong colors after calibration", and report the letter of the scanbar that is failing (module A in the example). If all the modules are failing, call HP support and report that. Vertical distortion If the lid sensor of the scanner fails, the scanner cannot detect when the lid is open. Hence, you can start a scan, and at some point find that the pressure sliders do not move the original through the scanner paper path. In the example below the original is on the left, the scanned image on the right: NOTE: The black arrow indicates the scanning direction. ■ Open and close the scanner lid by pushing it down until you hear a click. Then repeat your scan and visually check that the original advances correctly through the scanner path. If not, call HP support and report an "incorrect paper advance" error. Remember that your scanner is not intended to work with originals thicker than 0.75 mm (29 mil). Object replication (ghosting) This error very rarely appears in CIS scanners. However, you can occasionally find image defects. In the example below the original is on the left, the scanned image on the right: 142 Chapter 16 Troubleshooting copy and scan quality issues (only MFP)

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call HP support and report “completely wrong colors after calibration”, and report the letter of the
scanbar that is failing (module A in the example).
If all the modules are failing, call HP support and report that.
Vertical distortion
If the lid sensor of the scanner fails, the scanner cannot detect when the lid is open. Hence, you can start
a scan, and at some point find that the pressure sliders do not move the original through the scanner
paper path.
In the example below the original is on the left, the scanned image on the right:
NOTE:
The black arrow indicates the scanning direction.
■
Open and close the scanner lid by pushing it down until you hear a click. Then repeat your scan and
visually check that the original advances correctly through the scanner path. If not, call HP support
and report an “incorrect paper advance” error. Remember that your scanner is not intended to work
with originals thicker than 0.75 mm (29 mil).
Object replication (ghosting)
This error very rarely appears in CIS scanners. However, you can occasionally find image defects.
In the example below the original is on the left, the scanned image on the right:
142
Chapter 16
Troubleshooting copy and scan quality issues (only MFP)