Epson Gt20000 User Guide

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Scanning Problems
You Cannot Scan Using the Thumbnail Preview
❏If you are using Office Mode, the thumbnail preview is not available. Change the scan 
mode to Home Mode or Professional Mode. See “Changing the Scan Mode” on page 
22 for instructions.
❏If you are scanning images with a very dark or bright background, use normal preview 
and create marquees on the areas you want to scan. See “Previewing and Adjusting 
the Scan Area” on page 34 for instructions.
❏If...

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❏If the optional ADF is installed, you need to create a marquee for each photo on the 
document table. Create a marquee for each photo, click All in the Preview window, then 
click Scan. See “Previewing and Adjusting the Scan Area” on page 34 for instructions.
Scanning Takes a Long Time
❏Try scanning your original at a lower resolution setting to speed up scanning. See 
“Selecting the Scan Resolution” on page 32 for instructions. 
❏Computers with USB 2.0 (high...

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A Line or Line of Dots Always Appears in Your Scanned Images
The document table may need cleaning. Clean the document table. See “Cleaning the 
Scanner” on page 112. 
If you still have the problem, the document table may be scratched. Contact your dealer for 
assistance. See “Contacting Customer Support” on page 133.
Straight Lines in Your Image Come Out Crooked
Make sure the document lies perfectly straight on the document table.
Your Image Is Distorted or...

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Colors Are Patchy or Distorted at the Edges of Your Image
If your document is very thick or curled at the edges, cover the edges with paper to block 
external light as you scan.
Your Scanned Image Is Too Dark
❏If your original is too dark, try using the Backlight Correction feature in Home Mode or 
Professional Mode. See “Fixing Backlit Photos” on page 58 for instructions.
❏Check the Brightness setting. See Epson Scan Help for details.
❏Click Configuration, select...

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An Image on the Back of Your Original Appears in Your Scanned 
Image
If your original is printed on thin paper, images on the back may be visible to the scanner 
and appear in your scanned image. Try scanning the original with a piece of black paper 
placed on the back of it. Also make sure the Document Type and Image Type settings are 
correct for your original. See “Scanning in Office Mode” on page 23, “Scanning in Home 
Mode” on page 25, or “Scanning in...

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❏Adjust the Threshold setting.
Office Mode: Select Black&White as the Image Type setting and select the 
appropriate Image Option setting. Then try adjusting the Threshold setting. See Epson 
Scan Help for details.
Home Mode: Select Black&White as the Image Type setting. Then try adjusting the 
Threshold setting. See Epson Scan Help for details.
Professional Mode: Select Black & White as the Image Type setting. Click the 
+(Windows) or r(Mac OS X) button next to...

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❏Check the color matching and color management capabilities of your computer, display 
adapter, and software. Some computers can change the palette of colors on your 
screen. See your software and hardware manuals for details.
❏Windows: Use the color management system for your computer, ICM. Add a color 
profile that matches your monitor to improve on-screen color matching. Exact color 
matching is very difficult. Check your software and monitor documentation for...

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Uninstalling Epson Scan
Follow the instructions in the section for your operating system to uninstall Epson Scan.
Uninstalling Epson Scan for Windows
Note:
❏For Windows Vista, you need an administrator account and password if you log on as a 
standard user.
❏For Windows XP, you must log on to a Computer Administrator account.
❏For Windows 2000, you must log on as a user with administrative privileges (belonging to the 
Administrator group).
1. Turn off the...

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In some cases, a message may appear to prompt you to restart the computer. If so, 
make sure I want to restart my computer now is selected and click Finish.
Uninstalling Epson Scan for Mac OS X
Note:
You must log on to a Computer Administrator account.
1. Quit all running applications.
2. Insert the scanner software CD-ROM into your Macintosh.
3. Double-click the Mac OS X icon in the Epson folder. You see the CD Installer screen. 
4. Click Custom Install.
5....

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3. Do one of the following.
Windows Vista: Click the start button icon and select Control Panel.
Windows XP: Click Start and select Control Panel.
Windows 2000: Click Start, point to Settings, and select Control Panel.
4. Do one of the following.
Windows Vista: Click Uninstall a program from the Programs category.
Windows XP: Double-click the Add or Remove Programs icon.
Windows 2000: Double-click the Add/Remove Programs icon. 
5. Select your scanner’s Manual from...