HP ScanJet Pro 3500 User Guide - Page 53

Image quality problems, Scanned images are not straight, The scanned images have streaks or scratches

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Image quality problems Scanned images are not straight ● Verify that the document feeder guides are centered on the scanner and set to an appropriate width for the original being scanned. Make sure the paper guides touch the edges of the original. ● Windows: Use the Auto-Straighten feature to straighten content that is skewed relative to the page dimensions in the source document. Use the Auto Detect Size feature to deskew page images that might have become skewed during the scanning process. The scanned images have streaks or scratches For information on cleaning the scanner, see the Care and maintenance section of the User Guide. ● Check that the originals are clean and unwrinkled. ● Clean the scanner glass. Scanned image is fuzzy ● Check for any obstructions in the scanner paper path and make sure the paper width guides are positioned appropriately. Try another scan. ● Verify that the document is not fuzzy. The scan is completely black or completely white ● The item might not be placed correctly in the document feeder. Make sure that the item being scanned is placed face up in the document feeder. ● Windows: If scanning to a black and white image, make sure the black and white threshold is not set to either extreme . Setting the threshold to an extreme will result in an image that is all white or all black. ● OS X: If scanning to a text image using the Image Capture application, set Image Correction to Manual and use the Threshold slider bar to adjust the threshold. The bottom of the scanned image is cut off By default, the scanning software can scan media that is up to 356 mm (14 in) long. Verify that the page size selected in the scanning software (or the scan shortcut selected) will accommodate the length of the document being scanned. ENWW Image quality problems 45

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Image quality problems
Scanned images are not straight
●
Verify that the document feeder guides are centered on the scanner and set to an appropriate width for the
original being scanned. Make sure the paper guides touch the edges of the original.
●
Windows: Use the
Auto-Straighten
feature to straighten content that is skewed relative to the page
dimensions in the source document. Use the
Auto Detect Size
feature to deskew page images that might
have become skewed during the scanning process.
The scanned images have streaks or scratches
For information on cleaning the scanner, see the
Care and maintenance
section of the User Guide.
●
Check that the originals are clean and unwrinkled.
●
Clean the scanner glass.
Scanned image is fuzzy
●
Check for any obstructions in the scanner paper path and make sure the paper width guides are positioned
appropriately. Try another scan.
●
Verify that the document is not fuzzy.
The scan is completely black or completely white
●
The item might not be placed correctly in the document feeder. Make sure that the item being scanned is
placed face up in the document feeder.
●
Windows: If scanning to a black and white image, make sure the black and white threshold is not set to
either extreme . Setting the threshold to an extreme will result in an image that is all white or all black.
●
OS X: If scanning to a text image using the Image Capture application, set
Image Correction
to
Manual
and
use the
Threshold
slider bar to adjust the threshold.
The bottom of the scanned image is cut off
By default, the scanning software can scan media that is up to 356 mm (14 in) long.
Verify that the page size selected in the scanning software (or the scan shortcut selected) will accommodate the
length of the document being scanned.
ENWW
Image quality problems
45