Canon scanner CanoScan D660U User Manual

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Pre-Scan Checklist
Perform the checks on this short list before you begin troubleshooting
specific problems.
•Make sure that the ScanGear CS-U software was installed
successfully.
•Confirm that the cables between your computer and scanner are
connected securely.
•Before scanning or previewing, check that the data source has
been selected. If your scanner does not appear as an option when
you select a TWAIN source to scan from your imaging...

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How to Avoid Problems
Here is some general advice on avoiding problems in your scanning jobs:
•Start with the best possible original image to scan.
•Select only the part of the image you want to scan. Preview the
image and select it with the Crop and Auto Crop buttons. Not only
does a more precise selection save file space, but your image
quality will be much higher.
•Check the output file size before beginning the scan. Make sure
you have...

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•If you are using OCR software, scan in Text Enhanced at 300 dpi or
higher.
•Take advantage of the preview feature and preview as much as you
want before scanning. 

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Troubleshooting Checklist
The scanner diagnostics test fails.
Problem:The Scanner Diagnostics test, started with the Test Scanner
button on the Scanner sheet, returns a Test Failed
message.
Cause:The scanning unit may not be in its home position.
Solution:Close the ScanGear CS-U window if it is open. Try turning
the scanner off and back on again by unplugging and
plugging in the USB cable. Then restart your computer.
Colors not what you...

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The colors differ between the Preview and the Print
Problem:When printing the image, its color differ from the one in
the Preview area.
Cause1:The toner of the printer is going short.
Solution:Confirm the toner of the printer.
Cause2:Canon ColorGear Color Matching may have not been
selected when it was necessary.
Solution:Check that Canon ColorGear Color Matching is selected
on the Preferences sheet.
Cause3:The settings of the printer driver,...

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ScanGear CS-U does not launch.
Problem:ScanGear CS-U does not launch, the screen freezes, or
another software application launches.
Cause1:The scanner may not be connected correctly.
Solution:Make sure the scanner is properly connected to your
computer before you turn on the computer and start
Windows. If not, connect the scanner.  Then restart your
computer.
Cause2:You may have chosen the wrong scanner source in your
software application....

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Scanning is too slow.
Problem:The scanner is taking an unusually long time to print or
scan.
Cause1:The selected output resolution of the image may be too
high for the resolution of your printer, or your computer
may be low on memory.
Solution:Before scanning the image, make sure you have set the
Scan Resolution on the Main tab to not exceed the
resolution of your printer.  Also check to see if there is
enough memory available in your...

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Parts of images are missing or not aligned.
Problem:Some characters are missing from the image in the Preview
Area, or the image is not aligned in the Preview Area.
Cause:The page has been placed on the scanner improperly.
Solution:Check the scanner and place the original correctly to adjust
the image.
Image is too light or too dark compared to the original.
Problem:Scanned or printed image is much lighter or darker than
the original....

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Acquired Images
Images sent from your scanner software to the host graphics application.
Auto Crop
After you select an area of the screen by clicking the Crop button and
dragging a rectangle around the object or text you want to crop, click
the Auto Crop button to size the rectangle exactly to the size of the
object or block of text enclosed in the rectangle.
Auto Tone Adjustment
Automatic analysis and adjustment of the image using Contrast/
Brightness and...