Troubleshooting
Common Problems and Solutions
This section provides recommended solutions to common problems. If you have a problem that is not solved by the following, contact your local authorized Canon dealer.
Problem 1 The scanner will not turn on.
Solutions | Confirm that the AC adapter is plugged firmly into a | |
| power outlet. | |
Problem 2 The scanner is not recognized. | ||
Solutions | (1) | Confirm that the scanner is properly connected to |
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| the computer with a USB cable. |
| (2) | Confirm that the scanner is turned on. See the |
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| previous “Problem 1” if the scanner does not turn |
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| on. |
| (3) | The computer’s USB interface may not support the |
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| scanner. The scanner cannot be guaranteed to |
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| work with all USB interfaces. |
| (4) | Confirm that the supplied USB cable is used to |
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| connect the scanner to the computer. The scanner |
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| cannot be guaranteed to work with all available USB |
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| cables. |
| (5) | If the scanner is connected to the computer via a |
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| USB hub, try removing the hub and connecting |
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| directly to the computer. |
Problem 3 Documents feed askew (scanned images are | ||
| slanted). | |
Solutions | (1) | Align the document guides to fit the documents as |
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| closely as possible, and load the documents so that |
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| they feed straightly. |
| (2) | Enable [Automatically straightens skewed images] |
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| (or [Deskew]) in the scanner driver settings. |
| (3) | If many pages have been scanned since roller |
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| cleaning, clean the rollers. If documents still feed |
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| askew, roller replacement or other maintenance |
may be needed. See Chapter 7 Maintenance for roller replacement procedures.
Problem 4 Both sides are not scanned even when the Duplex
| scanner driver setting is enabled. |
Solutions | In CaptureOnTouch, executing a job for which single- |
| sided (simplex) scanning is registered will always result |
| in simplex scanning, regardless of scanner driver |
| settings. |
| To perform duplex scanning, either change the job |
| setting or create another job for duplex scanning. |
Problem 5 If white lines or streaks appear in scanned images.
Solutions | Clean both sides of the scanner glass, and the rollers. If | |
| a sticky substance such as glue or correction fluid is | |
| found, carefully wipe with just enough pressure to clean | |
| the area where the lines appear. If the problem cannot | |
| be solved by cleaning, the internal glass may be | |
| scratched. Contact your local authorized Canon dealer. | |
Problem 6 Pages are missing. | ||
Solutions | Then the scanner driver’s [Scanning Side] setting is | |
| [Skip Blank Page], documents with very little black may | |
| be unintentionally skipped. Click the [Setting] button and | |
| decrease the [Set the likelihood of skipping blank page] | |
| value, or select another scan mode setting such as | |
| [Simplex] or [Duplex]. If pages are skipped due to the | |
| document double feeding, see “Problem 7 Documents | |
| jam (or | |
Problem 7 Documents jam (or | ||
Solutions | (1) | If the roller has been installed correctly, clean it if |
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| necessary. |
| (2) | Proper scanning may not be possible when |
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| document pages stick together due to static |
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| electricity. Fan the documents before you load |
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| them. |
| (3) | Set the feed selection lever to the bypass position, |
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| and manually feed the scanner one page at a time. |
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