Canon PIXMA MP950 MP950 User's Guide - Page 139

Cannot display preview, Computer stops operating during scanning, Scan quality is poor Poor image

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Cause An error message appears and the ScanGear MP window fails to appear. Action z Reattaching the USB cable. Be sure to use a certified USB 2.0 Hi-Speed cable. You are recommended to use the cable no longer than 9.8 feet (3 meters). z If a USB hub is used for the connection, do not use it. Attach the cable to a USB port on the computer itself (not the hub). z Attach the USB cable to a different USB port on the computer itself (not a hub). z Set the Setup CD-ROM and install the software. z Select this machine in [Select Source] or [Import] in your application software. z Make sure that your application software supports TWAIN. You cannot start ScanGear MP from within an applilcation software that does not support TWAIN. „ Cannot display preview Cause Action An error message "Release the lock switch" appears and the machine fails to preview. Close the application softwares, disconnect the USB interface cable from the scanner and set the Scanner Lock Switch to the release position. Then reconnect the USB interface cable to the computer. For details on releasing the Scanner lock, refer to the Easy Setup Instructions. „ Computer stops operating during scanning Cause Output resolution set too high. Action Reboot the computer, lower the output resolution and rescan. The hard disk does not have enough available space. Multiple devices connected to the USB port. z Reset and reboot the computer, delete unnecessary files and application software, and rescan. z Open ScanGear MP from within the application software, click the [Preferences] button in the Advanced Mode, and change the folder listed in the [Select Folder Where Temporary Files are Saved] category to one on a disk with sufficient free space. Disconnect all other devices but the machine from the port. „ Scan quality is poor (Poor image displayed on the monitor) Cause The resolution is low. Specification of the application software. Moiré appears. Action If the image looks grainy, increase the scan resolution. For details, refer to the Scan Guide. Some application software does not display the image clearly if the image is too small. Set the view mode to 100%. Set [Descreen] to [ON] in the [Image Settings] section of the Advanced Mode of ScanGear MP. Note Moiré may appear when you scan digital photo prints. Chapter 12 Troubleshooting 137

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Chapter 12
137
Troubleshooting
Cannot display preview
Computer stops operating during scanning
Scan quality is poor (Poor image displayed on the monitor)
An error message appears and the
ScanGear MP window fails to
appear.
Reattaching the USB cable. Be sure to use a certified USB 2.0 Hi-Speed
cable. You are recommended to use the cable no longer than 9.8 feet (3
meters).
If a USB hub is used for the connection, do not use it. Attach the cable
to a USB port on the computer itself (not the hub).
Attach the USB cable to a different USB port on the computer itself (not
a hub).
Set the Setup CD-ROM and install the software.
Select this machine in [Select Source] or [Import] in your application
software.
Make sure that your application software supports TWAIN. You cannot
start ScanGear MP from within an applilcation software that does not
support TWAIN.
Cause
Action
An error message “Release the lock
switch” appears and the machine
fails to preview.
Close the application softwares, disconnect the USB interface cable from
the scanner and set the Scanner Lock Switch to the release position. Then
reconnect the USB interface cable to the computer. For details on
releasing the Scanner lock, refer to the
Easy Setup Instructions
.
Cause
Action
Output resolution set too high.
Reboot the computer, lower the output resolution and rescan.
The hard disk does not have enough
available space.
Reset and reboot the computer, delete unnecessary files and
application software, and rescan.
Open ScanGear MP from within the application software, click the
[Preferences] button in the Advanced Mode, and change the folder
listed in the [Select Folder Where Temporary Files are Saved] category
to one on a disk with sufficient free space.
Multiple devices connected to the
USB port.
Disconnect all other devices but the machine from the port.
Cause
Action
The resolution is low.
If the image looks grainy, increase the scan resolution.
For details, refer to the
Scan Guide
.
Specification of the application
software.
Some application software does not display the image clearly if the image
is too small. Set the view mode to 100%.
Moiré appears.
Set [Descreen] to [ON] in the [Image Settings] section of the Advanced
Mode of ScanGear MP.
Note
Moiré may appear when you scan digital photo prints.
Cause
Action