Canon scanner CanoScan FB 630UI User Manual

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61 chapter 6
Troubleshooting
Pre-Scan Checklist
Perform the checks on this short list before you begin
troubleshooting specific problems.
¥ Refer to the Quick Start Guide to make sure that the
ScanGear CS software was installed successfully.
¥ Check that the cables between your computer and scanner
are connected securely.
¥ Before scanning or previewing, check that your scanner has
been selected as the data source in the application. If your
scanner does not appear as an...

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62 chapter 6
Troubleshooting
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.
(F38, 39)  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...

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63 chapter 6
Troubleshooting
¥ 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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64 chapter 6
Troubleshooting
Troubleshooting
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 scan head may not be in its home position.
Solution:Close the ScanGear CS window if it is open.
Colors are not what you expect.
Problem:The colors in the preview image appear different
from the colors in the original image.
Cause:The scanned colors need to...

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65 chapter 6
Troubleshooting
The printed image colors appear different from image you
see in the Preview Area.
Problem:The colors in the printed image appear different
from the colors in the image you see on the screen.
Cause:Printer toner may be low. ColorGear color
matching may have not been selected when it was
necessary.
Solution:Check the toner cartridge in the printer and make
sure that it is not low or empty.  Check that
ColorGear color matching and Use ColorGear...

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Troubleshooting
ScanGear CS does not launch.
Problem:ScanGear CS does not launch, the screen freezes, or
another software application launches.
Cause:The scanner may not be connected correctly, or you
may have chosen the wrong scanner source in your
application. The scanner configuration file may
have been changed.
Solution:Make sure the scanner is properly connected to
your computer and that the AC adapter is
connected to your scanner.  If not, connect the...

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67 chapter 6
Troubleshooting
Parts of images are missing or mis-aligned.
Problem:Some characters are missing from the image in the
Preview Area, or the image is mis-aligned in the
Preview Area.
Cause:The page has been placed on the scanner
improperly.
Solution:Check the scanner and place the page improperly
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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68 chapter 6
Troubleshooting
The image I want to scan is too big for the scanner.
Problem:The image I want to scan is 50 percent larger than
my scanner platen.
Solution:Scan one half at a time, at exactly the same
settings. Then use your imaging application to join
the parts.
The scanned image has jagged edges.
Problem:The scanned image has jagged edges when viewed
on the screen or printed.
Cause:Jagged edges usually occur because of a conflict
between the scan...

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Glossary 

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Glossary
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...