Canon N650U, N656U, N1220U manual Troubleshooting

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Troubleshooting

Please refer to the following information if you encounter a problem using Plug-in Module CS-U. For further details, refer to the Troubleshooting item on the CD- ROM provided with your scanner.

If your problem lies outside the solutions provided below, consult the retail outlet from which you purchased the software or the closest Canon Customer Support Help Desk.

Hint

• Before you call for assistance, read the Getting Started guide.

•When you contact one of the help desks listed, you will be asked what kind of computer is connected with the scanner. Before you call, make sure you have prepared the information required on the system information page in the Getting Started guide.

	Problem:	The “Can’t use the driver required for a USB device. Search the
		Internet for a driver?” dialog displays on a system running
		Mac OS 9 (only applicable to Mac OS 9)

	➤Solution:	Scanner software has not been installed. Click the [Cancel] button to
		close the dialog. Detach the scanner, and install the required
		software from the CanoScan Setup Utility CD-ROM before
		reattaching the scanner. (➜ Getting Started guide)

	Problem:	Plug-in Module CS-U does not appear as an option on the
		menus of a plug-in compatible application program

	➤Solution:	Plug-in Module CS-U is not correctly installed on your hard disk
		drive. Reinstall Plug-in Module CS-U. (➜ Getting Started guide)

	Problem:	The image will not appear even if the Preview button is
		clicked on the Plug-in Module CS-U control panel

➤Solution 1: Make sure the original is set on the document glass correctly

➤Solution 2: The brightness settings for Plug-in Module CS-U may be set too high. Try lowering the brightness settings. For details about brightness setting, see Brightness and Contrast Settings (➜ p. 43)

➤Solution 3: The threshold setting for Plug-in Module CS-U may be set too high. Try lowering the threshold setting. For details about setting the threshold setting, see Adjusting Threshold Value (➜ p. 48)

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Contents Users Guide How to Make Best Use of the Manuals When you open the boxAbout the Conventions Used in this Guide How to Use this GuideWhere to Look Table of Contents Adjusting Scanned Images Installing Plug-in Module CS-U Operating EnvironmentControl Panel Features Image Size ppScanning Procedures E PPlug-in Module CS-U Special Features See the Results of Adjustments Immediately Dynamic PreviewGamma Curve Adjusts Image Brightness ColorSync Ver 2.0 + Compatible for Auto Tone CorrectionInstall Plug-in Module CS-U Quick Start InstructionsStart Plug-in Module CS-U Position materials for scanning and preview themVerify Image Quality with the Browser Function before Specify the Area of the Image to be ScannedClick on the Browser button Selection frame will appear Select the area to be scanned by clicking and draggingScan the Image p Save the Scanned Image pE P Displaying the Plug-in Module CS-U Control Panel RGB ValuesOperating Procedures Place the original on the scanners document glass ProceduresPositioning Originals Previewing Click on the Preview buttonSelecting the Output Device Setting the Resolution and Magnification Output Device Resolution= 720 dpi, Magnification= 100%To Set the Magnification Factor Set the desired magnification factor on the control panelSetting the Scan Mode Black and WhiteGrayscale Color DocumentsClick the arrow beside Scan Mode Select a scan mode from the pop-up menuVerifying the Image before Scanning To Verify the ImageRotating the Image Use these buttons to rotate the imageAspect Ratio Setting PreferencesOutput Device Unit Preview WindowClose Plug-in After Scan Reset Default SettingsCalibration Operating Procedures Scanning Setting the Scan Area Position the pointer in the preview windowSelect the area you want to enlarge with the zoom function Procedures to ZoomZooming Click on the Zoom In button Scanning To Initiate the ScanSpecify the Scan Area Click on the Scan buttonSaving Scanned Images Enter a name for the file and click the Save buttonColor Photos and Color Documents Grayscale, Color Photos and Color DocumentsBlack & White Tone Adjustment Tone Adjustment DialogHistogram Settings How to Interpret HistogramsTo Adjust a Histogram How to Adjust HistogramsClick on the OK button Shadow MarkTone Curve Settings Manipulating the GraphTo Edit the Tone Curve Click the OK buttonRelationship Between the Tone Curve Image Brightness Value =Brightness Brightness and Contrast SettingsContrast To Adjust the Brightness and Contrast Adjusting the Color Balance Operating ProcedureGamma value Gamma Value SettingsMatching the Gamma Value to the Display Characteristics To Change the Gamma Value Settings Adjusting the Threshold Value To Set the Threshold ValueAuto Tone Correction To Set the Auto Tone CorrectionStandard ColorSyncUnsharp Mask Open the Image menu and select Unsharp MaskDescreen Open the Image menu and select DescreenClick the Save button Saving/Recalling SettingsTo Save Settings in a Settings File To Recall a Settings File Scanning Techniques Matching Scan Resolution to PurposeOptical and Enhanced Resolutions Appendices Troubleshooting Problem Scan button cannot be selected Error Messages Error MessageCause ResponseGlossary Auto Tone CorrectionBits/Bit Numbers Black Eyedropper ToolColor Channel DotMagnification HistogramImage File Optical Resolution ResolutionMoiré PixelScan Mode ShadowsThreshold Value Tone CurveIndex Output device 7, 11, 18, 25Page Canon Customer Support Help Desk Canon Computer SYSTEMS, INCOE-040AA 052000 CDS Canon Inc