HP Officejet Pro 3620 User Guide - Page 76

Error messages appear, Scanned image quality is poor, Select Scanner

Page 76 highlights

Chapter 8 Error messages appear • Unable to activate TWAIN source or An error occurred while acquiring the image ◦ If you are acquiring an image from another device, such as another scanner, make sure that the other device is TWAIN-compliant. Devices that are not TWAIN-compliant do not work with the HP software provided with the printer. ◦ If you are using a USB connection, make sure that you have connected the USB Device Cable to the correct port on the back of your computer. ◦ Verify that the correct TWAIN source is selected. In the HP software, check the TWAIN source by selecting Select Scanner on the File menu. NOTE: The HP scanning software does not support TWAIN and WIA scanning on computers running Mac OS X. • Reload document and then restart job ◦ Press the button next to OK on the printer control panel, and then reload the remaining documents in the ADF. For more information see Load an original in the automatic document feeder (ADF) (HP Officejet Pro 3620 only). Scanned image quality is poor • The original is a second-generation photo or picture Reprinted photographs, such as those in newspapers or magazines, are printed by using tiny dots of ink that make an interpretation of the original photograph, which degrades the quality. Often, the ink dots form unwanted patterns that can be detected when the image is scanned or printed or when the image appears on a screen. If the following suggestions do not solve the problem, you might need to use a better-quality version of the original. ◦ To eliminate the patterns, try reducing the size of the image after scanning. ◦ Print the scanned image to see if the quality is better. ◦ Make sure that the resolution and color settings are correct for the type of scan job. ◦ For best results, use the scanner glass for scanning rather than the ADF (HP Officejet Pro 3620 only). • Text or images on the back of a two-sided original appear in the scan ◦ Two-sided originals can "bleed" text or images from the back side to the scan if the originals are printed on paper that is too thin or too transparent. • The scanned image is skewed ◦ The original might not have been loaded properly. Be sure to use the paper guides when loading originals into the ADF. For more information, see Load an original in the automatic document feeder (ADF) (HP Officejet Pro 3620 only). For best results, use the scanner glass for scanning rather than the ADF. • The image quality is better when printed The image that appears on the screen is not always an accurate representation of the quality of the scan. ◦ Try adjusting your computer monitor settings to use more colors (or levels of gray). On Windows computers, you typically make this adjustment by opening Display on the Windows control panel. ◦ Try adjusting the resolution and color settings. • The scanned image shows blots, lines, vertical white stripes, or other defects ◦ If the scanner glass is dirty, the image produced does not have optimum clarity. See Maintain the printer for cleaning instructions. ◦ The defects might be on the original and are not a result of the scanning process. • Graphics look different from the original ◦ Scan at a higher resolution. NOTE: Scanning at high resolution can take a long time, and it can take up a large amount of space on your computer. • Take steps to improve the scan quality ◦ Use the scanner glass to scan rather than the ADF (HP Officejet Pro 3620 only). ◦ Place the paper correctly. If the paper is placed incorrectly on the scanner glass, it might skew, which causes unclear images. For more information, see Load an original on the scanner glass. 72 Solve a problem

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Error messages appear
Unable to activate TWAIN source
or
An error occurred while acquiring the image
If you are acquiring an image from another device, such as another scanner, make sure that the other
device is TWAIN-compliant. Devices that are not TWAIN-compliant do not work with the HP software
provided with the printer.
If you are using a USB connection, make sure that you have connected the USB Device Cable to the
correct port on the back of your computer.
Verify that the correct TWAIN source is selected. In the HP software, check the TWAIN source by
selecting
Select Scanner
on the
File
menu.
NOTE:
The HP scanning software does not support TWAIN and WIA scanning on computers running
Mac OS X.
Reload document and then restart job
Press the button next to
OK
on the printer control panel, and then reload the remaining documents in
the ADF. For more information see
Load an original in the automatic document feeder (ADF) (HP
Officejet Pro 3620 only).
Scanned image quality is poor
The original is a second-generation photo or picture
Reprinted photographs, such as those in newspapers or magazines, are printed by using tiny dots of ink
that make an interpretation of the original photograph, which degrades the quality. Often, the ink dots form
unwanted patterns that can be detected when the image is scanned or printed or when the image appears
on a screen. If the following suggestions do not solve the problem, you might need to use a better-quality
version of the original.
To eliminate the patterns, try reducing the size of the image after scanning.
Print the scanned image to see if the quality is better.
Make sure that the resolution and color settings are correct for the type of scan job.
For best results, use the scanner glass for scanning rather than the ADF (HP Officejet Pro 3620 only).
Text or images on the back of a two-sided original appear in the scan
Two-sided originals can "bleed" text or images from the back side to the scan if the originals are
printed on paper that is too thin or too transparent.
The scanned image is skewed
The original might not have been loaded properly. Be sure to use the paper guides when loading
originals into the ADF. For more information, see
Load an original in the automatic document feeder
(ADF) (HP Officejet Pro 3620 only).
For best results, use the scanner glass for scanning rather than the ADF.
The image quality is better when printed
The image that appears on the screen is not always an accurate representation of the quality of the scan.
Try adjusting your computer monitor settings to use more colors (or levels of gray). On Windows
computers, you typically make this adjustment by opening
Display
on the Windows control panel.
Try adjusting the resolution and color settings.
The scanned image shows blots, lines, vertical white stripes, or other defects
If the scanner glass is dirty, the image produced does not have optimum clarity. See
Maintain the
printer for cleaning instructions.
The defects might be on the original and are not a result of the scanning process.
Graphics look different from the original
Scan at a higher resolution.
NOTE:
Scanning at high resolution can take a long time, and it can take up a large amount of
space on your computer.
Take steps to improve the scan quality
Use the scanner glass to scan rather than the ADF (HP Officejet Pro 3620 only).
Place the paper correctly. If the paper is placed incorrectly on the scanner glass, it might skew, which
causes unclear images. For more information, see
Load an original on the scanner glass.
Chapter 8
72
Solve a problem