Chapter 8 Troubleshooting
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1. 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 | (1) | Confirm that the power switch is set correctly. |
| (2) | Confirm that the AC adapter is plugged firmly into a power |
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| outlet. |
| (3) | When the power switch is in the AUTO position, the scanner only |
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| turns on when the computer is on. |
Problem 2 | The scanner is not recognized. | |
Solutions | (1) Confirm that the scanner is properly connected to the computer | |
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| with a USB cable. |
| (2) | Confirm that the scanner is turned on. See the previous problem |
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| (1) if the scanner does not turn on. |
| (3) | The computer’s USB interface may not support the scanner. The |
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| scanner cannot be guaranteed to work with all USB interfaces. |
| (4) | Confirm that the supplied USB cable is used to connect the |
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| scanner to the computer. The scanner cannot be guaranteed to |
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| work with all available USB cables. |
| (5) | If the scanner is connected to the computer via a USB hub, try |
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| removing the hub and connecting directly to the computer. |
Problem 3 | Documents feed askew (scanned images are slanted). | |
Solutions | (1) | Align the document guides to fit the documents as closely as |
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| possible, and load the documents so that they feed straightly. |
| (2) | Enable the [Deskew] scanner driver setting. |
| (3) | If many pages have been scanned since roller cleaning, clean the |
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| rollers. If documents still feed askew, roller replacement or other |
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| maintenance may be needed. See Chapter 7 Maintenance for |
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| roller replacement procedures. |
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