
Chapter 13
Troubleshooting
139
Scanning
X
Problems Scanning
Cause
Action
The USB hub or repeater is
defective.
If you can scan documents successfully after connecting the USB
cable directly to the computer, the USB hub or repeater may be
broken. Replace if necessary.
You cannot scan because the
machine is connected to a USB
hub.
Connect the USB cable directly to the computer without using a USB
hub. To connect to the computer via a USB hub, overwrite the INI
file by the following procedure. We recommend that you copy to
another folder the files you open in 1., and save the files before
overwriting them.
1. In Memo Pad or Text Editor, open the following files.
z
Windows 98/Me
Windows/System/CNCMP51.ini
z
Windows 2000
Winnt/system32/CNCMP51.ini
z
Windows XP
Windows/System32/CNCMP51.ini
2. Below the last line, add the following two lines, and save the files.
Be careful not to overwrite any other portion of the file.
[Scan]
ReadSize=16
After installing the MP Toolbox
and MP Drivers, you installed a
TWAIN-compliant application.
After installing the software on the machine, if you install a
TWAIN-compliant application, the TWAIN system files may not be
correctly overwritten, and thus images may not be scanned. Uninstall
the software from the machine, then reinstall it. (See page 72)
The machine is not recognized in
the [Scanners and Cameras]
window of [Control Panel].
Follow this procedure to check whether the machine icon is present
in [Scanners and Cameras] of [Control Panel]:
1. Confirm that the USB cable is connected, and start the computer.
2. For Windows XP, click [Start] on the taskbar, then [Control
Panel]. (Other Windows: Click [Start] on the taskbar, point to
[Settings], then click [Control Panel].)
3. For Windows XP, in the [Control Panel] window, click [Printers
and Other Hardware], then [Scanners and Cameras]. (Other
Windows: Double-click [Scanners and Cameras].)
4. In the [Scanners and Cameras] window, if [WIA Canon MP390]
(Other Windows: [Canon MP390]) is present, the machine is
recognized. If not, uninstall the software and reinstall it.
(See page 72)
Memory is insufficient.
Close other open applications and try again.
PC