Canon scanner CanoScan FB 620U User Manual

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Problems with the Initial Connection of the Scanner to a USB Port
Scanner Appears as an Unknown Device Not a Scanner
Cause 1: Computer or computer operating system is incompatible with the scanner, or
the USB interface has not been enabled in the BIOS
Solution: The performance guarantee for this scanner and its software is limited to its
operation with computers running Windows 98 that are equipped with a
built-in USB port. Computers running Windows 95 with a USB port on an
optional expansion card...

32
Problems with Software Installation
Installation is unsuccessful
Cause 1: Insufficient memory to run the installer program
Solution: Close other software programs that are running and reinstall
Cause 2: Insufficient free hard disk space
Solution: Delete or transfer unnecessary files from the hard disk and reinstall.  Refer to
the Quick Start Guide for the required free hard disk space.
Nothing displays when the CanoScan Setup Utility CD-ROM is placed in the drive
Cause: CD-ROM will not automatically...

33
Problems starting ScanGear CS-U as a TWAIN driver from within another application
Cause 1: Insufficient memory (RAM) available to start ScanGear CS-U
Solution: Close other programs and start ScanGear CS-U
Cause 2: ScanGear CS-U already running as a TWAIN driver within another application
Solution: Close the ScanGear CS-U already running as a TWAIN driver (See ScanGear CS-U
UserÕs Guide electonic manual)
Cause 3: ScanGear CS-U is not installed
Solution: Install ScanGear CS-U (See Quick Start Guide)...

34
Problems with the Scanner
Scanner not identified
Cause 1: Scanner not powered on when computer is started
Solution: Plug in the AC adapter to an outlet
Cause 2: USB interface cable is disconnected or loose
Solution: Securely connect USB interface cable (See Quick Start Guide)
Cause 3: Computer has not correctly recognized scanner
Solution: Use the following procedures to have the computer recognize the scanner
1. Click the Windows [Start] menu and select [Settings] and [Control Panel].
2. Look for an...

35
Problems with Scanning
Scanner will not scan
Cause 1: Scanner not powered up
Solution: Securely connect the AC adapter to the scanner and electrical outlet
(See Quick Start Guide)
Cause 2: Scanning unit locked
Solution: Unlock scanning unit by setting lock switch to unlocked position
(See Quick Start Guide)
Cause 3: Software incorrectly installed
Solution: Reinstall software (See Quick Start Guide)
Scanning unit fails to return to ready position (front of scanner)
Cause: AC adapter out of contact with...

36
Scan quality is poor
Cause 1: Document cover is open
Solution: Close the document cover
Cause 2: Original document floating on document glass
Solution: Gently press down on the document cover to prevent the document from
floating
Cause 3: Improperly closed or floating document cover
Solution: Hold document cover down with hand during scan
Cause 4: Dirty document glass or document cover
Solution: Clean document glass or document cover (See p. 38)
Cause 5: Incorrect scan settings
Solution: Rescan with...

37
Stripes appear on scan of publication
Cause: MoirŽ effect from scan of publication at high resolution (print screen lines
highlighted by optical interference, producing striped patterns).  The appear-
ance of this effect is dependent upon particular combinations of screen line
densities and scanning resolutions
Solution: Rescan at different resolutions (See the ScanGear CS-U UserÕs Guide
electronic manual)
Whitened edges on image scanned from thick book
Cause:Scanner employs an ultra-sensitive...

38
Care and Maintenance
Clean off the dirt and dust that adheres to the exterior, document glass and document cover of the
scanner during the course of ordinary operation using the following procedures.
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1. Power down the computer and peripheral devices.
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2. Unplug the AC adapter from the electrical outlet.
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3. Detach the USB interface cable from the scanner....

39
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5. Thoroughly remove any moisture or water vapor from the scanner with a
dry cloth.
Moisture left on the document glass or cover may damage photographs and other
documents as well as produce poor results.
Never use substances
containing alcohol,
thinners or benzene to
clean the equipment.
Outer CasingDocument
Cover
Document Glass 

40
CanoScan FB620U
Scanner Type Flatbed (stationary document type)
Scanning Element CIS (Contact Image Sensor)
Light Source Three-color RGB LEDÕs
Optical Resolution 600 x 600 dpi
Selectable Resolution 2.5-2400 dpi
Scanning Bit Depth Color 12 bit input/8 bit output for each color (RGB)
Grayscale 12 bit input/8 bit output
Prescan Speed 15 sec
Start Button Yes
Interface USB
Maximum Document Size A4/Letter, 8.5 x 11.7 in. (216 x 297 mm)
Operating Range Temperature 41¼ to 95¼ F (5¼ to 35¼ C)
Humidity 10% to...